Edelstähle für hochkorrosive Umgebungen

Ultra

Die Ultra-Kategorie ist die beste Wahl für die Herausforderungen der Nasskorrosion Ihrer Anwendung. Sie enthält Edelstahlprodukte für hochkorrosive Umgebungen.

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Outokumpu Ultra grades

Ultra 904L stainless steel

Ultra 904L is a high-nickel and molybdenum austenitic stainless steel with very high corrosion resistance. It was originally developed for handling sulfuric acid at ambient temperatures, and is now used in a broad range of chemical industry applications.

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  • EN: 1.4539
  • ASTM type: 904L
  • ASTM UNS: NO8904
  • Microstructure: Austenitic
Typical applications
  • Chemical and petrochemical industry equipment such as pipes, heat exchangers, tanks, and reactor vessels
  • Sulfuric acid handling
  • Flanges and valves
Typical chemical composition, % by mass
  • C: 0.01
  • Cr: 19.8
  • Ni: 24.2
  • Mo: 4.3
  • N: -
  • Others: 1.4Cu

Ultra 254 SMO stainless steel

A 6 % molybdenum and nitrogen-alloyed austenitic stainless steel with extremely high resistance to both uniform and localized corrosion. This product was developed especially for oil and gas offshore platforms and the pulp and paper industry.

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  • EN: 1.4547
  • ASTM type: -
  • ASTM UNS: S31254
  • Microstructure: Austenitic
Typical applications
  • Applications requiring resistance to chlorinated seawater
  • Flue gas cleaning
  • Maritime exhaust gas cleaning (EGC)
  • Bleaching equipment in the pulp and paper industry
  • Flanges and valves
Typical chemical composition, % by mass
  • C: 0.01
  • Cr: 20.0
  • Ni: 18.0
  • Mo: 6.1
  • N: 0.20
  • Others: Cu

Ultra 317L stainless steel

Ultra 317L is a molybdenum-alloyed austenitic stainless steel with higher corrosion resistance than Supra 316L/4404 – mainly used in the USA and Asia.

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  • EN: 1.4438
  • ASTM type:

    317L

     

  • ASTM UNS: S31703
  • Microstructure : Austenitic
Typical applications
  • Chemical processing industry
Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 18.2
  • Ni: 13.7
  • Mo: 3.1
  • N: -
  • Others : -

Ultra 725LN stainless steel

Ultra 725LN is a type 310 material (high chrome and high nickel) that has been developed and optimized specifically for urea production, which demand extremely high corrosion resistance. It has similar general pitting resistance to Ultra 904L.

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  • EN: 1.4466
  • ASTM type: -
  • ASTM UNS: S31050
  • Microstructure: Austenitic
Typical applications
  •  Urea applications
Product forms
Typical chemical composition, % by mass
  • C: 0.01
  • Cr: 25.0
  • Ni: 22.3
  • Mo: 2.1
  • N: 0.12
  • Others: -

Ultra 6XN stainless steel

Ultra 6XN is a 6 % molybdenum, high-nickel and nitrogen-alloyed austenitic product with extremely high resistance to both uniform and localized corrosion.

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  • EN: 1.4529
  • ASTM type: -
  • ASTM UNS: N08926/N08367
  • Microstructure: Austenitic
Typical applications
  • Applications requiring resistance to chlorinated seawater
  • Flue gas cleaning
Typical chemical composition, % by mass
  • C: 0.01
  • Cr: 20.5
  • Ni: 24.8
  • Mo: 6.5
  • N: 0.20
  • Others: Cu

Ultra 654 SMO stainless steel

Ultra 654 SMO is the most corrosion-resistant stainless steel in the world. A 7 % molybdenum, very high nitrogen alloyed austenitic product with high mechanical strength. A potentially lean alternative to traditional wet-corrosion resistant nickel-based alloys.

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  • EN: 1.4652
  • ASTM type: -
  • ASTM UNS: S32654
  • Microstructure: Austenitic
Typical applications
  • Pressurized and erosive systems handling chlorinated seawater at higher temperatures
  • Plate heat exchangers
  • Flue gas cleaning applications
Typical chemical composition, % by mass
  • C: 0.01
  • Cr: 24.0
  • Ni: 22.0
  • Mo: 7.3
  • N: 0.50
  • Others: 3.5Mn Cu

Sanicro® 35 nickel base alloy

Sanicro® 35 is the latest addition to the Outokumpu Ultra range bridging the gap between high performance stainless steel and conventional nickel base alloys. This new grade has excellent corrosion resistance in combination with high mechanical strength. Due to its leaner alloying concept Sanicro® 35 can be an attractive and cost competitive alternative to nickel base alloys with similar properties.

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  • W. Nr: -
  • UNS: N08935
  • ISO: -
  • Microstructure: Austenitic
Sanicro®35 in a nutshell
  • Excellent resistance to pitting and crevice corrosion
  • Excellent resistance to stress corrosion cracking (SCC)
  • Very suitable in seawater applications
  • High resistance to uniform corrosion in acid and caustic environments
  • High resistance to erosion-corrosion
  • Very high mechanical strength
  • Good fabrication properties such as forming and welding

Sanicro® is a trademark owned by Alleima AB

Typical applications
  • Heat exchangers
  • Equipment in oil refineries
  • Equipment in biorefineries
  • Equipment in chemical process industry
  • Seawater and brine handling equipment

 

Product forms

Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 27.0
  • Ni: 35.5
  • Mo: 6.4
  • N: 0.27
  • Others : Cu

Ultra Alloy 825 nickel base alloy

Outokumpu Ultra Alloy 825 is a titanium stabilized austenitic nickel base alloy with an addition of copper.

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  • W.-Nr.: 2.4858
  • UNS: N08825
  • ISO: NW8825/ NiFe30Cr21Mo3
  • Microstructure: Austenitic
Typical applications
  • Components in sour gas service
  • Offshore oil and gas piping systems
  • Equipment in petroleum refineries
  • Heating coils
  • Heat exchangers
  • Tanks
  • Scrubbers
  • Chemical processing equipment
  • Food process equipment
  • Nuclear industry equipment
Typical chemical composition, % by mass
  • C: 0.01
  • Cr: 23.0
  • Ni: 39.0
  • Mo: 3.2
  • Cu: 1.7
  • Others: Ti 0.75, Mn 0.8, Si 0.35, Al 0.1, Fe bal.

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Ultra

Die Ultra-Kategorie umfasst hochlegierte austenitische Güten, die für extrem korrosive Umgebungen mit einem PRE-Wert von über 27 ausgelegt sind.

Die Ultra-Kategorie umfasst unsere Hauptprodukte Ultra Alloy 825 (EN 2.4858), Ultra 904L (EN 1.4539) und Ultra 254 SMO (EN 1.4547) sowie mehrere Alternativen, darunter den korrosionsbeständigsten Edelstahl der Welt, Ultra 654 SMO (EN 1.4652), für Ihre ganz speziellen Anwendungen.

Die Ultra-Kategorie ist die beste Wahl, wenn Sie Material für extrem korrosive Umgebungen benötigen, in denen Standard-Edelstahlgüten wie Core 304L/4307 oder Supra 316L/4404 nicht ausreichen, um die Korrosionsanforderungen Ihrer Anwendung zu erfüllen. 

Die Edelstähle der Ultra-Kategorie weisen nicht nur eine hervorragende Korrosionsbeständigkeit auf, auch die Festigkeits- und Dehnungseigenschaften der Ultra-Kategorie sind im Vergleich zu herkömmlichen austenitischen Edelstählen ähnlich oder besser. Der Zusatz von Stickstoff zu Güten der Ultra-Kategorie wie etwa Ultra 254 SMO verleiht ihnen eine höhere Streckgrenze und Zugfestigkeit. Trotz der höheren Festigkeit dieser Stähle bieten sie sehr gute Möglichkeiten sowohl für die Kaltverformung als auch für die Warmumformung. Stähle der Ultra-Kategorie eignen sich gut zum Schweißen, und die für das Schweißen herkömmlicher austenitischer Stähle verwendeten Verfahren können auch für diese Produkte angewendet werden.

Typische Anwendungen für Güten der Ultra-Kategorie sind:

  • chemische und petrochemische Industrie
  • maritime Abgasreinigung
  • Wärmetauscher
  • Anwendungen, die Beständigkeit gegen gechlortes Meerwasser erfordern.

Ultra Alloy 825 ist eine Ti-stabilisierte austenitische Nickelbasislegierung, die in der Öl- und Gasindustrie in Rohrleitungssystemen, Erdölraffinerieanlagen und Sauergasanlagen verwendet wird. Ultra 904L wird in Ausrüstungen der petrochemischen Industrie wie Rohren, Wärmetauschern, Tanks und Reaktorbehältern verwendet. Ultra 254 SMO eignet sich für Anwendungen, die eine Beständigkeit gegen chloriertes Meerwasser erfordern, für die Rauchgasreinigung, die Reinigung von Schiffsabgasen sowie für Bleichanlagen in der Zellstoff- und Papierindustrie und für Flansche und Ventile.

Die Güten der Ultra-Kategorie können in einer Vielzahl von Anwendungen eingesetzt werden, die durch eine breite Auswahl an Oberflächenausführungen von Walzwerken und Servicecentern unterstützt werden.

Standards und Zulassungen für die Kategorie Ultra

EN 10028-7 Flat products for pressure purposes – Stainless steels
EN 10088-2 Stainless steels – Corrosion resisting sheet/ plate/strip for general and construction purposes
EN 10088-3 Stainless steels – Corrosion resisting semi-finished products/bars/rods/wire/sections for general and construction purposes
EN 10088-4 Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes
EN 10088-5 Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resistant steels for construction purposes
EN 10272 Stainless steel bars for pressure purposes
EN 10283 Corrosion resistant steel castings

 The most commonly used international product standards are given in the table above. For a full list of standards by product, see steelfinder.outokumpu.com  

ASTM A 193 / ASME SA-193 Alloy and stainless steel bolts and nuts for high pressure and high temperature service
ASTM A 240 / ASME SA-240 Cr and Cr-Ni stainless steel plate/sheet/strip for pressure purposes
ASTM A 276 Stainless and heat-resisting steel bars/shapes
ASTM A 312 / ASME SA-312 Seamless and welded austenitic stainless steel pipe
ASTM A 351 / ASME SA-351 Steel castings, austenitic, duplex for pressure containing parts
ASTM A 358 / ASME SA-358 Electric fusion-welded austenitic Cr-Ni alloy steel pipe for high temperature
ASTM A 409 / ASME SA-409 Welded large diameter austenitic pipe for corrosive or high-temperature service
ASTM A 473 Stainless steel forgings for general use
ASTM A 479 / ASME SA-479 Stainless steel bars for boilers and other pressure vessels
ASTM A 743 Castings, Fe-Cr-Ni, corrosion resistant for general application
ASTM A 744 Castings, Fe-Cr-Ni, corrosion resistant for severe service
ASTM B 649 / ASME SB-649 Bar and wire

 The most commonly used international product standards are given in the table above. For a full list of standards by product, see steelfinder.outokumpu.com

NACE MR0175 Sulfide stress cracking resistant material for oil field equipment
Norsok M-CR-630 Material data sheets for 6Mo stainless steel
VdTÜV WB 473 Austenitischer Stahl X 1 CrNiMoCuN 20 18 7 Werkstoff-Nr. 1.4547
VdTÜV WB 537 Stickstofflegierter austenitischer Stahl X2CrNiMnMoN 25-18-6-5 Werkstoff-Nr 1.4565

 The most commonly used international product standards are given in the table above. For a full list of standards by product, see steelfinder.outokumpu.com

  • 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) 

For the list of certificates and approvals by mill, see outokumpu.com/certificates

Downloads zur Kategorie Ultra

Outokumpu Ultra range datasheet
Outokumpu Product Ranges chart
Outokumpu Degerfors quarto plate product and dimension program
Machining guidelines for high-alloy-superaustenitic stainless 654 SMO®
Machining guidelines for high alloyed superaustenitic stainless steel 254 SMO®
Machining guidelines for standard austenitic stainless steel grades