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.

Ultra-Sortimentsdatenblatt herunterladen

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Outokumpu Ultra grades

Ultra 904L

High Ni and Mo austenitic grade with very high resistance to corrosion. Commonly used in chemical and petrochemical industry for handling medium concentrated sulphuric acid.

Typical applications
  • Process equipment in chemical industry
  • Petrochemical industry
  • Bleaching equipment in the pulp and paper industry
  • Flue gas cleaning
  • Desalination
  • Seawater handling
  • Hydrometallurgy
  • Food and beverage
  • Pharmaceuticals
  • Heat exchangers
Product forms
Chemical composition

Ultra 254 SMO®

Ultra 254 SMO is 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.

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
Product forms
Chemical composition

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.

Typical applications
  • Chemical tankers
  • Pulp and Paper equipment
  • Condenser tubes and heat exchanger tubes
  • Equipment for the petrochemical industry
  • Flue-gas desulfurization equipment
Product forms
Chemical composition

Ultra 725LN

Ultra 725LN is a high Ni and Mo austenitic grade with similar corrosion resistance to Ultra 904L. Typically used in Urea applications. Available as plate only.

Typical applications
  • Urea applications
  • Pulp & Paper industry
  • Flue gas cleaning
  • Chemical industry
  • Pharmaceutical industry
Product forms
Chemical composition

Ultra 6XN

Ultra 6XN is 6% Mo, high Ni, and N alloyed austenitic grade with extremely high resistance to both uniform and localized corrosion. It is commonly used in applications to withstand chlorinated sea water also used in flue gas cleaning.

Typical applications
  • In applications to withstand chlorinated sea water
  • Flue gas cleaning
  • Process equipment in chemical industry
  • Bleaching equipment in the pulp and paper industry
  • Desalination
  • Seawater handling
  • Hydrometallurgy
  • Food and beverage
  • Pharmaceuticals
  • Heat exchangers
Product forms
Chemical composition

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.

Typical applications
  • Plate heat exchangers
  • Tube, plate and shell of tubular heat exchangers
  • Scrubbers
  • Flue gas cleaning
  • Carbon capture
  • Sea water
  • Brine
  • Chlorinated acids
  • Chlorinated hydrocarbons
  • Chemical
  • Petrochemical
  • Refinery industry
  • Inorganic acids
  • Organic acids
  • Fine chemicals
  • Oil & gas equipment
  • Biorefining
  • Geothermal
Product forms
Chemical composition

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.

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
Product forms
Chemical composition

Durchsuchen Sie Steel Finder nach Outokumpu-Stahlsorten

Steel Finder

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
Sanicro® 35 datasheet
Outokumpu Product Ranges chart
Outokumpu Degerfors quarto plate product and dimension program
Machining guidelines for high alloyed superaustenitic stainless steel 254 SMO®
Machining guidelines for standard austenitic stainless steel grades