Outokumpu Dura range
Heat treatable stainless steels for greater hardness and strength
Key grades
Dura 420/4021
A very popular martensitic stainless steel that is corrosion resistant in water and steam.
Dura 420/4034
A high-hardness martensitic stainless steel that is corrosion resistant in water and steam.
We believe in the world that lasts forever
Why Dura range
Why Outokumpu
• Outokumpu is a global leader in stainless steel, and innovator of the first stainless steels in the world.• A strong customer focus, sustainability, and technical excellence are at the heart of everything we do.
• As a customer you benefit from our strong R&D and technical support
Why stainless steel
• The durability of stainless steel means that it is not only the best, but also the most economically sustainable choice for a wide range of applications.• All of our products are made from an average of 85% recycled material and are fully recyclable at the end of their lifecycles.
Outokumpu Dura stainless steel grades
Dura 420/4021
Description A very popular martensitic stainless steel that is corrosion resistant in water and steam.
EN 1.4021
ASTM type 420
ASTM UNS S42000
Microstructure Martensitic
Typical applications
- Cutting utensils
- Surgical instruments
- Press plates
- Brake discs
- Mechanical parts
- Flanges and valves
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.20
Cr 13.0
Ni -
Mo -
N -
Others -
Dura 420/4034
Description A high-hardness martensitic stainless steel that is corrosion resistant in water and steam.
EN 1.4034
ASTM type 420
ASTM UNS S42000
Microstructure Martensitic
Typical applications
- Professional kitchen knives
- Surgical instruments
- Press plates
- Brake discs
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.45
Cr 13.7
Ni -
Mo -
N -
Others -
Dura 410/4006
Description A martensitic stainless steel that is corrosion resistant in water and steam. Grade is only available as press plate.
EN 1.4006
ASTM type 410
ASTM UNS S41000
Microstructure Martensitic
Typical applications
- Valves
- Flanges
- Axles
- Pump parts
- Brake discs
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.12
Cr 12.0
Ni -
Mo -
N -
Others -
Dura 4024
Description A martensitic stainless steel with slightly better hardenability than Dura 410/4006 that is corrosion resistant in water and steam.
EN 1.4024
ASTM type -
ASTM UNS -
Microstructure Martensitic
Typical applications
- Mechanical engineering applications
- Surgical instruments
Datasheet Download Dura range datasheet
Typical chemical composition, % by mass
C 0.16
Cr 13.2
Ni -
Mo -
N -
Others -
Dura 4120
Description Similar to Dura 420/4021 but with improved corrosion resistance and hightemperature strength.
EN 1.4024
ASTM type -
ASTM UNS -
Microstructure Martensitic
Typical applications
- Mechanical engineering applications
- Surgical instruments
Datasheet Download Dura range datasheet
Typical chemical composition, % by mass
C 0.16
Cr 13.2
Ni -
Mo -
N -
Others -
Dura 420/4028
Description A martensitic stainless steel that is corrosion resistant in water and steam.
EN 1.4028
ASTM type 420
ASTM UNS S42000
Microstructure Martensitic
Typical applications
- Cutting utensils
- Surgical instruments
- Measuring tools
- Flanges and valves
- Wear-resistant mechanical parts
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.30
Cr 12.5
Ni -
Mo -
N -
Dura 4419Mo
Description Similar to Dura 420/4028, but with improved corrosion resistance and high-temperature strength.
EN 1.4419
ASTM type -
ASTM UNS -
Microstructure Martensitic
Typical applications
- Mechanical engineering applications
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.38
Cr 13.3
Ni -
Mo 0.9
N -
Others -
Dura 420/4031
Description A martensitic stainless steel with medium-high hardness that is corrosion resistant in water and steam.
EN 1.4031
ASTM type 420
ASTM UNS S42000
Microstructure Martensitic
Typical applications
- Cutting utensils
- Surgical instruments
- Measuring tools
- Wear-resistant mechanical parts
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.38
Cr 13.5
Ni -
Mo -
N -
Others -
Dura 4122
Description Outokumpu’s most corrosion-resistant martensitic stainless steel. Good resistance in moderately corrosive, low-chloride environments and very good mechanical properties and wear resistance. Medium-high hardness.
EN 1.4122
ASTM type -
ASTM UNS -
Microstructure Martensitic
Typical applications
- Surgical instruments
- Food processing equipment
- Mechanical parts
- Machine and pump construction
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.41
Cr 16.1
Ni -
Mo 1.0
N -
Others -
Dura 4110
Description A high-hardness martensitic stainless steel with improved corrosion and wear resistance compared to Dura 420/4034.
EN 1.4410
ASTM type -
ASTM UNS -
Microstructure Martensitic
Typical applications
- Knife blades
- Scissors
- Surgical cutting tools
- Measuring tools
- Pump construction
- Valves
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.50
Cr 14.8
Ni -
Mo 0.8
N -
Others -
Dura 4116
Description Similar to Dura 4110 but with elevated wear resistance.
EN 1.4116
ASTM type -
ASTM UNS -
Microstructure Martensitic
Typical applications
- Cutting instruments that undergo partial hardening
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.50
Cr 14.4
Ni -
Mo 0.6
N -
Others -
Dura 17-4PH
Description A martensitic precipitation hardening steel with high strength and hardness, good corrosion resistance, and satisfactory formability (depending on heat treatment/condition).
EN 1.4542
ASTM type 630
ASTM UNS S17400
Microstructure Precipitation hardening
Typical applications
- Oil field equipment
- Chemical process equipment
- Fittings
- Pump shafts
- Gears
- Paper mill equipment
- Aircraft parts
- Flanges and valves
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.02
Cr 15.5
Ni 4.8
Mo -
N -
Others Nb, Cu
Dura 17-7PH
Description A precipitation hardening stainless steel with high strength and hardness, good corrosion resistance, and satisfactory formability (depending on heat treatment/condition).
EN 1.4568
ASTM 631
UNS S17700
Microstructure Precipitation hardening
Typical applications
- Retaining rings
- Springs
- Valves and flanges
- Gears
- Aircraft parts
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.08
Cr 17.0
Ni 7.0
Mo -
N -
Others Al
Dura 15-7PH
Description A precipitation hardening stainless steel with high strength and hardness, good corrosion resistance, and satisfactory formability (depending on heat treatment/condition).
EN 1.4574
ASTM type 632
ASTM UNS S15700
Microstructure
Precipitation hardening
Typical applications
- Retaining rings
- Springs
- Valves
- Aircraft parts
Product forms
Datasheet Download Dura range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Chemical composition
C 0.08
Cr 14.5
Ni 7.5
Mo 2.2
N -
Others 1Al
Standards and approvals for Dura range
Dura range stainless steels meet the following standards:
ASME SA240M Code Sect. II. Part A
ASTM A240/A240M
ASTM A240M
EN 10088-2
EN 10088-3
EN 10088-4
EN 10088-5
Outokumpu meets the most common certifications and approvals, including:
- AD 2000 Merkblatt
- Approval of Material Manufacturers
- Factory Production Control Certificate
- ISO 9001
- ISO 14001
- ISO 50001
- ISO/TS 16949
- NORSOK
- OHSAS 18001
- Pressure Equipment Directive (PED)
