Cold rolled coil, strip and sheet

Circle Green Moda 409/4512

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Moda 409/4512 is a weldable ferritic stainless steel with good oxidation resistance in dry air. This product is also available as low-carbon Moda 409L. Its corrosion resistance is limited in applications with increased corrosiveness. Because of its titanium alloying, Moda 409/4512 can be welded in all dimensions without becoming susceptible to intergranular corrosion. It is possible to use Moda 409/4512 in high-temperature applications, for instance in automotive exhaust systems, where it is often used to replace aluminium-coated carbon steel.

Moda 430/4016

Moda 430/4016 is a classic 16% chromium ferritic stainless steel. Good corrosion resistance in mildly corrosive environments combined with good formability have made this product one of the most used non-hardenable ferritics, especially in indoor environments.

Moda 439/4510

Moda 439/4510 is a titanium-stabilized 17% chromium ferritic steel with improved corrosion resistance, formability, and weldability compared to Moda 430/4016.

Moda 439/4510 is a medium-chromium ferritic stainless steel, which can be used in many mildly corrosive environments. Because of its titanium alloying, Moda 439/4510 can be welded in all dimensions without becoming susceptible to intergranular corrosion. It is possible to use Moda 439/4510 at elevated temperatures, for instance the cold end of automotive exhaust systems.

Moda 4589

Moda 4589 is a 14% chromium product with a small amount of niobium for elevated strength, making it suitable for structural parts exposed to loads that demand higher yield points.

Moda 4589 is a structural medium-chromium martensitic-ferritic stainless steel with enhanced wear resistance. Due to its chromium content and its molybdenum alloying, it can be used in many mildly corrosive environments. Because of its titanium content, Moda 4589 can be welded in all dimensions without becoming susceptible to intergranular corrosion.

Moda 410L/4003

Moda 410L/4003 is a weldable ferritic stainless steel with elevated yield strength and resistance to abrasion. Its better corrosion resistance compared to carbon steels enables lower maintenance costs and longer service life.

Outokumpu Moda 410L/4003 is a low-chromium structural ferritic stainless steel. Its corrosion resistance is limited in applications with increased corrosiveness. Moda 410L/4003 can, however, replace carbon steel in many structural applications. When some discoloration in more aggressive environments is not acceptable, Moda 410L/4003 may be painted. 

Moda 410L/4003 is available in many product forms and dimensions, often also from stainless steel stockholders.

Circle Green Moda 410L/4003

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Circle Green Moda 410L/4003 is a weldable ferritic stainless steel with elevated yield strength and resistance to abrasion. Its better corrosion resistance compared to carbon steels enables lower maintenance costs and longer service life.

Outokumpu Circle Green Moda 410L/4003 is a low-chromium structural ferritic stainless steel. Its corrosion resistance is limited in applications with increased corrosiveness. Circle Green Moda 410L/4003 can, however, replace carbon steel in many structural applications. When some discoloration in more aggressive environments is not acceptable, Circle Green Moda 410L/4003 may be painted. 

Moda 409/4512

Moda 409/4512 is a weldable ferritic stainless steel with good oxidation resistance in dry air. This product is also available as low-carbon Moda 409L. Its corrosion resistance is limited in applications with increased corrosiveness. Because of its titanium alloying, Moda 409/4512 can be welded in all dimensions without becoming susceptible to intergranular corrosion. It is possible to use Moda 409/4512 in high-temperature applications, for instance in automotive exhaust systems, where it is often used to replace aluminium-coated carbon steel.

Core 304/4301

Core 304/4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. It’s an all-purpose product with good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Core 304/4301 can be delivered with a variety of surface finishes.

Core 304/4301 is an austenitic stainless steel, which belongs to the standard CrNi stainless steel family. Core 304/4301 is the basic variant with normal carbon and nickel content.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Core 304/4301 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Circle Green Core 304/4301

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Circle Green Core 304/4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. It’s an all-purpose product with good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Circle Green Core 304/4301 can be delivered with a variety of surface finishes.

Circle Green Core 304/4301 is an austenitic stainless steel, which belongs to the standard CrNi stainless steel family. Circle Green Core 304/4301 is the basic variant with normal carbon and nickel content.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Circle Green Core 304/4301 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Core 304L/4307

Core 304L/4307 is a low-carbon alternative to Core 304/4301. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion. It’s suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.

Core 304L/4307 is an austenitic stainless steel that belongs to the standard CrNi stainless steel family.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Core 304L/4307 is commonly available from many stainless steel stockists in many product forms and dimensions. Core 304L/4307 is also available in the temper rolled condition with higher strength.

Circle Green Core 304L/4307

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Circle Green Core 304L/4307 is a low-carbon alternative to Circle Green Core 304/4301. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion. It’s suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.

Circle Green Core 304L/4307 is an austenitic stainless steel that belongs to the standard CrNi stainless steel family.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Circle Green Core 304L/4307 is commonly available from many stainless steel stockists in many product forms and dimensions. Circle Green Core 304L/4307 is also available in the temper rolled condition with higher strength.

Core 304LN/4311

Core 304LN/4311 is a low-carbon, higher nickel and nitrogen alloyed alternative to Core 304/4301 with improved strength and low-temperature toughness. Suitable for applications that require high tensile strength. is an austenitic stainless steel that belongs to the standard CrNi stainless steel family.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products. Due to its fully austenitic structure, Core 304LN/4311 is suitable for applications with low magnetic permeability requirements (µ < 1.005).

Core 304L/4306

Core 304L/4306 is a higher nickel alternative to Core 304L/4307 with improved formability and deep drawability. Core 304L/4306 is an austenitic stainless steel that belongs to the standard CrNi stainless steel family. Core 304L/4306 has the variant with 10.5 wt.% nickel for improved formability and low carbon content for improved resistance against intergranular corrosion after welding.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Core 304L/4306 is commonly available from many stainless steel stockists in manyproduct forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Core 305/4303

Core 305/4303 is a high-nickel alternative to Core 304/4301 with reduced strain hardening and excellent cold forming properties. Ideal for parts that require high deformation degrees.

Core 305/4303 is an austenitic stainless steel that belongs to the standard CrNi stainless steel family. It has 12.5 wt.-% nickel for improved formability.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products. Core 305/4303 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Core 347/4550

Core 347/4550 is a niobium stabilized alternative Core 321/4541 with improved intergranular corrosion resistance and good mechanical properties at high temperatures. Core 347/4550 is particularly useful in applications with intermittent heating in the range 400–900 °C/750–1650 °F. Core 347/4550 is an austenitic stainless steel that belongs to the standard CrNi stainless steels. Core 347/4550 can be welded in all dimensions without becoming susceptible to intergranular corrosion.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Core 301LN/4318

Core 301LN/4318 is a low-carbon, nitrogen alloyed alternative to Core 301/4310 with elevated strength, making it particularly suitable for lightweight construction. Temper rolled Core 301LN/4318 is used for applications that require increased hardness and strength.

Core 301LN/4318 is an austenitic CrNi stainless steel with high nitrogen and relatively low nickel content. Due to its high nitrogen content, Core 301LN/4318 has increased mechanical strength and shows a high degree of work hardening on mechanical deformation. As nitrogen-alloying improves corrosion properties, this product offers similar corrosion resistance to austenitic CrNi standard grades in many corrosive environments.

Core 301LN/4318 is used in applications where corrosion resistance and a combination of high mechanical strength and good formability are needed. Due to its tendency to work hardening, Core 301LN/4318 can absorb an increased amount of energy during deformation. It can be delivered in the temper rolled condition with different strength levels.

Core 201/4372

Core 201/4372 is a low-nickel stainless steel with properties approaching Core 301/4310 but with a higher work hardening coefficient.

Core 201/4372 is an austenitic stainless steel, which belongs to the family of the austenitic low nickel CrMn stainless steels, in which manganese replaces a part of the nickel that is normally alloyed to CrNi standard grades. It is the basic product of the CrMn stainless steel family. Due to its high nitrogen content, Core 201/4372 has increased mechanical strength and shows a high degree of work hardening on mechanical deformation.

The corrosion resistance of the austenitic CrMn grades is usually slightly below the corrosion resistance of the austenitic CrNi standard grades. Core 201/4372 is used in applications where a combination of high mechanical strength and good formability as well as corrosion resistance is needed. Due to its tendency to work hardening, Core 201/4372 can absorb an increased amount of energy during deformation. It can be delivered in the temper rolled condition with different strength levels.

Core 201LN/4372

This low-nickel stainless steel also has properties approaching Core 301/4310, but has a higher strength than Core 201/4372. It hardens more quickly due to its higher work hardening coefficient.

Core 441/4509

Core 441/4509 is a nickel-free 17% chromium ferritic stainless steel originally designed for exhaust systems, with good corrosion resistance and high-temperature strength. Core 441/4509 is available with a single (niobium) or dual (niobium and titanium) stabilizer. Due to good formability and weldability, it is often a suitable replacement for Core 301/4310.

Core 441/4509 can be supplied with a wide range of functional and aesthetic surface finishes.

Circle Green Core 441/4509

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Circle Green Core 441/4509 is a nickel-free 17% chromium ferritic stainless steel originally designed for exhaust systems, with good corrosion resistance and high-temperature strength. Circle Green Core 441/4509 is available with a single (niobium) or dual (niobium and titanium) stabilizer. Due to good formability and weldability, it is often a suitable replacement for Core 301/4310.

Circle Green Core 441/4509 can be supplied with a wide range of functional and aesthetic surface finishes.

Core 4622

Core 4622 is a nickel-free, high-chromium (21Cr) ferritic stainless steel with equal corrosion resistance to Core 304/4301. Core 4622 has excellent deep drawability and is almost ridging free, meaning it is easier to polish and has a lower overall production cost.

Core 4622 is a 21% chromium ferritic stainless steel, which can be used in many corrosive environments. Because of its titanium and niobium alloying, Core 4622 can be welded in all dimensions without becoming susceptible to intergranular corrosion. It is possible to use Core 4622 at elevated temperatures, like for instance in automotive exhaust systems. Core 4622 can be supplied with a wide range of functional and aesthetic surface finishes.

Core 4513

Core 4513 is a 1% molybdenum-alloyed ferritic stainless steel with medium chromium content. It is suitable for use in many corrosive environments, like for instance in the cold end of automotive exhaust systems. Because of its titanium alloying, Core 4513 can be welded in all dimensions without becoming susceptible to intergranular corrosion.

Supra 316/4401

Supra 316/4401 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steels. Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products. Supra 316/4401 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Circle Green Supra 316/4401

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Supra 316L/4404

Supra 316L/4404 is our most widely used molybdenum-alloyed austenitic stainless steel. Supra 316L/4404 is a low-carbon stainless steel and is used in various process industries and other aggressive environments with higher than average corrosion resistance requirements. Due to its low carbon content, this product is also weldable in thicknesses of more than 5–6 mm/ 0.19–0.23 in without sensitivity to intergranular corrosion.

Supra 316L/4404 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steels. Grade Supra 316L/4404 has low carbon content for improved resistance against intergranular corrosion after welding.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316L/4404 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Circle Green Supra 316L/4404

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Circle Green Supra 316L/4404 is our most widely used molybdenum-alloyed austenitic stainless steel. Circle Green Supra 316L/4404 is a low-carbon stainless steel and is used in various process industries and other aggressive environments with higher than average corrosion resistance requirements. Due to its low carbon content, this product is also weldable in thicknesses of more than 5–6 mm/ 0.19–0.23 in without sensitivity to intergranular corrosion.

Circle Green Supra 316L/4404 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steels. Grade Circle Green Supra 316L/4404 has low carbon content for improved resistance against intergranular corrosion after welding.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Circle Green Supra 316L/4404 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316plus®

With its high chromium and nitrogen content Supra 316plus™ delivers high corrosion resistance, high strength, good formability, and excellent weldability, making it ideal for use in a variety of applications, including heat exchangers, water treatment, and piping, as well as in architectural applications such as indoor and outdoor facades.

Supra 316plus™ is an austenitic Cr-Ni-Mo stainless steel with 21 wt.-% chromium and relatively low nickel and molybdenum content. Due to its high nitrogen content, it has increased mechanical strength and shows a high degree of work hardening on mechanical deformation. Due to its high chromium and nitrogen content, Supra 316plus™ offers similar or better corrosion resistance than austenitic Cr-Ni-Mo standard grades in many corrosive environments.

Supra 316plus™ is used in applications where increased corrosion resistance and a combination of high mechanical strength and good formability is needed. Due to its tendency to work hardening, Supra 316plus can absorb an increased amount of energy during deformation. It can be delivered in the temper rolled condition with different strength levels.

Supra 316/4436

Supra 316/4436 is a Supra 316L/4432 alternative with higher carbon content and similar corrosion resistance. Supra 316/4436 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steel family. Supra 316/4436 has the variant with increased molybdenum content for slightly improved corrosion resistance.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications that demand increased corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316/4436 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316L/4432

Supra 316L/4432 has high resistance to non-oxidizing acids and chloride-containing media due to its higher molybdenum content. Supra 316L/4432 has good formability and weldability. Supra 316L/4432 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steel family. It has low carbon content for improved resistance against intergranular corrosion after welding and increased molybdenum content for slightly improved corrosion resistance.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316L/4432 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316L/4435

Supra 316L/4435 is a Supra 316L/4432 alternative with higher chromium and nickel content for enhanced corrosion resistance and formability. Supra 316L/4435 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steel family. Supra 316L/4435 has low carbon content for improved resistance against intergranular corrosion after welding, increased nickel content for improved formability, and increased molybdenum content for slightly improved corrosion resistance.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316L/4435 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316Ti/4571

Supra 316Ti/4571 is a titanium-stabilized, molybdenum-alloyed austenitic alternative to Supra 316L/4404 – mainly used for elevated temperature applications. Due to its titanium-stabilization this product is weldable in all thickness ranges without becoming susceptible to intergranular corrosion. It belongs to the standard CrNiMo stainless steel family.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products. Due to its titanium content, Supra 316Ti/4571 can also be used at elevated temperatures.

Supra 316Ti/4571 is commonly available from many stainless steel stockists in many product forms and dimensions. Due to its titanium alloying, polishing options for Supra 316Ti/4571 are limited.

Supra 444/4521

Supra 444/4521 is a nickel-free, molybdenum alloyed ferritic stainless steel with very good corrosion resistance, good cold formability, and high strength. Supra 444/4521 allows for thinner walls in tanks and is not prone to stress-corrosion cracking.

Supra 444/4521 is a 2% molybdenum-alloyed ferritic stainless steel with medium chromium that can be used in many corrosive environments. As a ferritic stainless steel, it has high resistance to chloride-induced stress corrosion cracking. Because of its titanium alloying, Supra 444/4521 can be welded in all dimensions without becoming susceptible to intergranular corrosion.

Forta DX 2205

Forta DX 2205 is the most popular duplex product on the market. It offers very good resistance to uniform and localized corrosion and stress corrosion cracking in combination with high mechanical strength.

Forta LDX 2101®

Forta LDX 2101 is a lean-alloyed duplex product with good resistance to localized and uniform corrosion, as well as stress corrosion cracking, making it a good substitute for coated carbon steel. It also offers high mechanical strength and good machinability.

Forta DX 2304

Duplex grade with good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. Used in e.g. offshore topside applications since more than 20 years.

The grade is also available as Forta EDX 2304 with enhanced corrosion resistance and strength, but still within the same EN/ASTM standards as Forta DX 2304. The EDX version has a NORSOK approval from Aker Engineering & Technolgy ASaccording to NORSOKM standard M-650 Edition 4, September 2011 "Qualification of manufacturers of special materials".

Forta EDX 2304

Forta LDX 2404®

Austenitic-ferritic stainless steel also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also molybdenum, these steels offer good resistance to localised and uniform corrosion. The duplex microstructure contributes to the high strength and high resistance to stress corrosion cracking. Duplex steels have good weldability. All duplex grades have the maximum service temperature restricted to 250 or 325°C according to EN10028-7 or ASME II-D 2007 respectively. Outokumpu produces a range of duplex grades, LDX 2101^®; 2304; LDX 2404^®; 2205; 4501 and 2507.

LDX 2404^®is a molybdenum-containing duplex stainless steel with high contents of chromium and nitrogen. The grade combines a higher mechanical strength than for other common duplex grades with a generally high corrosion resistance.These characteristics make

LDX 2404^® well suited for optimal designs with respect to strength, reduced maintenance, durability and long-term cost efficiency.

Forta SDX 100

Austenitic-ferritic stainless steel also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also molybdenum, these steels offer good resistance to localised and uniform corrosion. The duplex microstructure contributes to the high strength and high resistance to stress corrosion racking. Duplex steels have good weldability. All duplex grades have the maximum service temperature restricted to 250 or 325°C according to EN10028-7 or ASME II-D 2007 respectively. Outokumpu produces a range of duplex grades, LDX 2101®, 2304, LDX 2404®, 2205, 4501 and 2507. The properties of 4501 is in general terms very similar to those of 2507. Grade 4501 is delivered if specified.

Forta SDX 2507

Forta SDX 2507 is a super duplex product with higher corrosion resistance and mechanical strength than Forta DX 2205. Often used in extremely corrosive environments such as desalination, chemical, or offshore subsea applications.

Forta H400

Forta H400 has higher strength than standard Core 304/4301 and a lower nickel content, making it a cost-effective and lightweight austenitic product for the automotive industry. It has been used in automotive applications for over 10 years.

Forta H400 is an austenitic stainless steel, which belongs to the austenitic low-nickel CrMn stainless steel family, in which manganese replaces part of the nickel that is normally alloyed to CrNi standard grades. This variant has low carbon content. Due to its high nitrogen content, Forta H400 has increased mechanical strength. Forta H400 is optimized for strong work hardening on mechanical deformation.

The corrosion resistance of the austenitic CrMn grades is usually slightly below that of the austenitic CrNi standard grades. Forta H400 is used in applications where a combination of high mechanical strength and good formability, as well as corrosion resistance, is needed. Due to its strong tendency to work hardening, Forta H400 can absorb a high amount of energy during deformation. It can be delivered in the temper rolled condition with different strength levels.

Forta 430/4016

Forta 430/4016 is a classic 16% chromium ferritic stainless steel for mildly corrosive environments. Not recommended for welding due to its decreased intergranular corrosion resistance

Forta 4589

Forta 301LN/4318

Forta 301LN/4318 is a low-carbon, nitrogen-alloyed alternative to Forta 301/4310 with elevated strength, making it particularly suitable for lightweight construction applications.

Forta 301/4310

Forta 301/4310 is a lower chromium and nickel variant of Core 304/4301 with high work hardening capacity. Used for items subject to high mechanical loading.

Forta 304/4301

Forta 304/4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. Forta 304/4301 is an all-purpose product with good resistance to atmospheric corrosion and to many organic and inorganic chemicals.

Forta 304L/4307

Forta 304L/4307 is a low-carbon alternative to Core 304/4301. Forta 304L/4307 is an all- purpose product with good resistance to atmospheric and intergranular corrosion.

Forta 316/4401

A normal-carbon, molybdenum-alloyed stainless steel that is widely used for various applications with higher than average corrosion resistance requirements. Forta 316/4401 is strengthened with temper rolling for applications that require specific strength.

Forta 316plus®

Forta 316Ti/4571

Forta 316Ti/4571 is a titanium-stabilized, molybdenum-alloyed austenitic steel for highly corrosive environments, including applications in elevated temperatures.

Ultra 904L

Ultra 904L is a high-nickel and molybdenum austenitic grade with very high resistance to corrosion. It is commonly used in chemical and petrochemical industry for handling medium concentrated sulphuric acid.

Sanicro® 35

Sanicro® 35 (UNS N08935)  is a newly developed alloy combining the best features of a high performance austenitic stainless steel and nickel based alloys. This grade has excellent corrosion resistance in combination with a high mechanical strength.

NOTE: Sanicro®35 is a trademark owned by Alleima AB and produced as plates and sheets by Outokumpu under a license agreement.

• Excellent resistance to pitting and crevice corrosion
• Excellent resistance to stress corrosion cracking (SCC)
• High resistance to uniform corrosion in acid and caustic environments
• High resistance to erosion-corrosion
• Very high mechanical strength
• Good weldability using nickel based alloy consumables.

Sanicro® 35 complies with NACE MR0175/ISO 15156-3 as a type 4a and 4c material, with significantly higher environmental limits than 6Mo grades like Ultra 254 SMO. Additionally, cold worked Sanicro® 35 (to 965 and 1240 MPa) has been tested in a NACE MR0175/ISO 15156 Test Level VI environment according to NACE TM0198 with no indication of SCC.

Ultra Alloy 825

Outokumpu Ultra Alloy 825 (W.-Nr. 2.4858, UNS N08825, ISO NW8825) is a titanium stabilized austenitic nickel base alloy with an addition of copper.

• Excellent resistance to stress corrosion cracking
• Very good resistance in oxidizing and reducing acids
• Moderate resistance to pitting and crevice corrosion
• Good mechanical properties also at elevated temperatures
• Reduced risk for sensitization when used in temperature ranges where this is a problem for stainless steels.

Outokumpu Ultra Alloy 825 is listed in ISO 15156-3 (NACE MR0175), materials for oil and gas production, and in NACE MR0103, materials resistant to sulfide stress cracking.

Ultra 317L

Ultra 317L is a Mo alloyed austenitic grade with higher corrosion resistance than “316L”. It is used, for instance, in chemical processing industry applications.

Circle Green Dura 4116

Circle Green® is the world’s first towards zero carbon stainless steel. It has the lowest carbon footprint in the industry.

Similar to 1.4110, but with elevated wear resistance. Applied especially for cutting instruments which undergo partial hardening for excellent wear resistance of functional surfaces.

Dura 4024

Martensitic grade with slightly increased hardenability (comp. 1.4006). Corrosion resistant in water and steam. For mechanical engineering applications and surgical instruments.

Dura 420/4021

Very popular martensitic grade. Corrosion resistant in water and steam. Low-medium hardness for applications such as cutting utensils, surgical instruments, press plates, brake discs and mechanical parts.

Dura 420/4028

Medium-hardness martensitic grade. Corrosion resistant in water and steam. Applied for cutting utensils, surgical instruments, measuring tools, mechanical parts esp. subject to wear.

Dura 420/4031

Martensitic grade with medium-high hardness . Corrosion resistant in water and steam. Applied for cutting utensils, surgical instruments, measuring tools, mechanical parts subject to wear.

Dura 420/4034

High-hardness martensitic grade. Corrosion resistant in water and steam. For e.g. professional kitchen knives, top-quality knives, surgical instruments, press plates, brake disks.

Dura 4110

High hardness martensitic grade (comp. 1.4034), but with improved corrosion and wear resistance. Applied for e.g. knife blades, scissors, surgical cutting tools, measuring tools, pump construction, valves.

Dura 4116

Similar to 1.4110, but with elevated wear resistance. Applied especially for cutting instruments which undergo partial hardening for excellent wear resistance of functional surfaces.

Dura 4122

Outokumpu’s most corrosion resistant martensitic grade, good resistance in moderately corrosive, low chloride containing environments. Very good mechanical properties and wear resistance. Medium-high hardness. Applied for e.g. surgical instruments, food processing equipment, mechanical parts, machine and pump construction.

Dura 17-7PH

Precipitation hardening grade with high strength and hardness, good corrosion resistance and satisfactory formability (depending on heat treatment/”Condition”). For e.g. retaining rings, springs, valves and gears, aircraft parts.

Therma 253 MA®

Therma 253 MA is a stainless steel with excellent oxidation and creep resistance in cyclic conditions that is best employed in temperatures up to 1150 °C/2100 °F. There is a slight susceptibility to embrittlement during continuous operation at 600–850 °C/1110–1560 °F.

Therma 310S/4845

Austenitic heat resisting 4845 grade with very good oxidation resistance. This grade 4845 belongs to austenitic chromium-nickel stainless steel grades. A specific feature for 4845 grade is high chromium and high nickel contents, which make this grade suitable for use in high temperatures. A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Characteristic properties
• Good resistance to oxidation
• Good resistance to high-temperature corrosion
• Good mechanical strength at elevated temperatures

Therma Alloy 800

The Therma range contains heat-resisting stainless steels and alloys for use in applications with high service temperatures normally > 550 °C/1020 °F. Outokumpu Therma Alloy 800 is a high temperature alloy design for high creep strength, resistance to carburization, oxidation, and other types of high-temperature corrosion.

Therma Alloy 800 (EN 1.4876, UNS N08800) is stabilized austenitic alloys with high Nickel and Chromium content as well as controlled additions of Carbon, Titanium and Aluminum. Additionally, grain size is controlled for improved creep strength properties.

Therma Alloy 800/800H

The Therma range contains heat-resisting stainless steels and alloys for use in applications with high service temperatures normally > 550 °C/1020 °F. Outokumpu Therma Alloy 800/800H & 800T is a series of high temperature alloys design for high creep strength, resistance to carburization, oxidation, and other types of high-temperature corrosion.

Therma Alloy 800 series (EN 1.4876/1.4958/1.4959, UNS N08800/N08810/N08811) are stabilized austenitic alloys with high Nickel and Chromium content as well as controlled additions of Carbon, Titanium and Aluminum. Additionally, grain size is controlled for improved creep strength properties.

Therma Alloy 800T

The Therma range contains heat-resisting stainless steels and alloys for use in applications with high service temperatures normally > 550 °C/1020 °F. Outokumpu Therma Alloy 800/800H/800T is a series of high temperature alloys design for high creep strength, resistance to carburization, oxidation, and other types of high-temperature corrosion.

Therma Alloy 800 series (EN 1.4876/1.4958/1.4959, UNS N08800/N08810/N08811) are stabilized austenitic alloys with high Nickel and Chromium content as well as controlled additions of Carbon, Titanium and Aluminum. Additionally, grain size is controlled for improved creep strength properties.

Therma 4622Nb®

Outokumpu Therma 4622Nb™ (EN 1.4622) dual stabilized ferritic stainless steel has enhanced high temperature creep resistance above 1000°C due to alloying of niobium and silicon. Thanks to its high chromium content improved corrosion resistance is achieved. That makes it ideal for a wide range of applications such as automotive exhaust systems, furnace equipment, annealing boxes, air heaters and burner nozzles. Therma 4622Nb™ fulfils ASTM UNS S44330.

Therma 4622Nb™ has:

• Good corrosion resistance Comparable to common austenitic grades, such as 304L (EN 1.4307).
• Competitive and stable price 
• Excellent cost stability compared to Ni-alloyed austenitic grades and Mo-alloyed acid proof grades.
• Deep drawable Ideal for deep drawing applications with high R-value and limiting drawing ratio (LDR).
• Good weldability
• Low risk of sensitization due to stabilization. Less distortion than in austenitic grades due to higher heat transfer. 
• Good machinability
• Lower work hardening versus austenitic grades.

Therma 4828

Austenitic grade with improved oxidation resistance. Commonly used for furnace equipment (esp. supporting parts), annealing and hardening boxes, air heaters.

A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Therma 309S/4833

Austenitic grade with improved oxidation resistance. Commonly used for furnace equipment, annealing boxes, thermo wells, baffle plates and salt pots.

A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Therma 314/4841

Austenitic heat resisting grade with excellent oxidation resistance. Commonly used for furnace equipment, super heater suspensions, enameling grates etc.

A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Therma 4713

A ferritic low-alloyed stainless steel best employed at 550–800°C/1020–1470°F when you need higher mechanical loading compared to other ferritic grades.

Offers good resistance against sulfur attack compared to austenitic stainless grades.

Therma 4724

Low-alloyed ferritic heat resisting grade with improved scaling resistance. Uncritical regarding embrittlement at service temperatures. Applied for e.g. furnace equipment, thermal boiler components, grids, burner nozzles, conveying parts, thermowells.

The high temperature (HT) ferritic stainless steels complement Outokumpu austenitic heat and creep portfolio. The main alloying element in the ferritic grades is chromium. Its positive effect on the scaling resistance is enhanced by silicon and aluminium. The characteristic properties are excellent resistance to oxidising and reducing sulphur containing atmospheres, good resistance to oxidation and high thermal conductivity with low thermal expansion.

Therma 4713 does not form brittle phases but should only be exposed to moderately corrosive atmospheres owing to its low chromium content.

Therma 4724 is a truly stainless high temperature grade with 13% chromium. It is not critical in terms of embrittlement. 4742 shows better scaling resistance than 4724 and can be subjected to reducing sulphur environments without risk. It is subject to 475°C embrittlement and grain coarsening at temperatures above 950°C. σ-phase may form after long time exposures to temperatures around 650°C.

1.4762 - with the highest chromium content- is the most resistant to reducing sulphurous gases. It is susceptible to the same embrittlement phenomena as 4742 whilst σ-phase forms during long exposures in the range 600°C to 800°C.