Stainless steels for highly corrosive environments Pitting and crevice corrosion Pitting and crevice

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    Stainless steels for highly corrosive environments Outokumpu Supra range datasheet

    General characteristics The Supra range contains stainless steel products designed for highly corrosive environments.

    Key product

    Outokumpu name Typical applications Product forms

    Supra 316/4401 Supra 316/4401 is a widely used Molybdenum alloyed austenitic stainless steel. It’s an all-purpose product with very good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Supra 316/4401 can be delivered with a variety of surface finishes.

    • Heat exchangers • Flanges and valves

    C, H, P, B, R, S, T

    Supra 316L/4404 Supra 316L/4404 is a low-carbon alternative to Supra 316/4401. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion.Supra 316L/4404 is suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.

    • Chemical industry • Petrochemical industry • Pulp and paper industry • Textile industry • Food and beverage industry • Pharmaceutical industry • Medical applications • Flanges and valves

    C, H, P, B, R, S, T

    Outokumpu name Typical applications Product forms

    Supra 316plus The highest strength stainless steel in the Supra range. Supra 316plus is a cost-efficient, 21Cr lower-nickel/molybdenum alternative to traditional molybdenum austenitics like Supra 316L. This product has good formability, excellent weldability, and is usable in cryogenic applications.

    • Process and transport tanks • Water treatment and pipes • Heat exchangers • Architectural applications

    C, H, P

    Supra 316L/SANS4402 A high-strength, high-formability product often used in container transports and where there is an elevated temperature requirement.

    • Container tanks C, H, P

    Alternatives

    Read more at outokumpu.com/supraSUPRA is a trademark of Outokumpu Oyj.

    http://www.outokumpu.com/supra

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    Outokumpu name Typical applications Product forms

    Supra 316/4436 A product with high resistance to non-oxidizing acids and chloride-containing media due to higher molybdenum content. Supra 316/4436 has good formability and weldability.

    • Pulp and paper industry equipment

    • Pharmaceutical industry equipment

    • Flanges and valves

    C, H, P, B, R, S, T

    Supra 316L/4432 Supra 316L/4432 is a low-carbon alternative to Supra 316/4436. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion.

    • Drinking water systems • Cooling systems • Wastewater systems • Flanges and valves

    C, H, P, B, R, S, T

    Supra 316L/4435 A Supra 316L/4432 alternative with higher chromium and nickel content for enhanced corrosion resistance and formability.

    • Urea plants • Pulp and synthetic fiber plants • Flanges and valves

    C, H, P, B, R, S, T

    Supra 316Ti/4571 A titanium-stabilized alternative to Supra 316L/4404 – mainly used in Germany for elevated temperature applications. Due to its titanium-stabilization this product is weldable in all thickness ranges.

    • Flue gas applications • Flanges and valves

    C, H, P, B, R, S, T

    Outokumpu name Typical applications Product forms

    Supra 444/4521 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.

    • Hot water tanks • Drinking water pipes

    C, H, P, S

    Nickel-free stainless steels

    Product forms: C = Cold rolled coil and sheet H = Hot rolled coil and sheet P = Quarto plate B = Bar R = Wire rod S = Semi-finished (bloom, billet, ingot & slab) T = Pipe

    Outokumpu Supra range datasheet – outokumpu.com/supra

    http://www.outokumpu.com/supra

  • 3Outokumpu Supra range datasheet – outokumpu.com/supra

    Product performance comparison Yield strength vs. corrosion resistance

    Fracture elongation vs. corrosion resistance

    PRE calculation = %Cr + 3.3 x % Mo + 16 x %N Note: PRE values shown are based on Outokumpu typical composition. Yield strength (Rp0.2) and Elongation (A80) % according to EN 10088-2 minimum values for cold rolled strip. 1) According to ASTM A240. 2) According to EN 10028-7.

    For more values by product, please see steelfinder.outokumpu.com

    Strength vs. corrosion resistance

    200

    250

    0

    300

    350

    400

    450

    500

    550

    600

    100 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60

    650

    Corrosion resistance (PRE)

    Moda 4589

    Moda 410L/4003

    Forta DX 2205

    Forta SDX 2507

    Forta EDX 2304 Forta

    FDX 251 Forta

    FDX 271

    Forta LDX 2404

    Forta DX 2304

    Forta LDX 2101

    Forta SDX 100

    Ultra 904L

    Ultra 725LN

    Ultra 254 SMO

    Ultra 4565

    Ultra 654 SMO

    Ultra 4439

    Ultra 317L

    Moda 409/4512

    Supra 316/4401 Supra 316L/4404 Supra 316Ti/4571

    Moda 430Ti/4520

    410S/4000 Moda

    Core 304LN/

    4311

    Core 301LN/4318

    Core 201/4372

    Core 304/4301

    Moda 430/4016

    Core 304L/4307 Core 304L/4306 Core 305/4303 Core 347/4550

    Supra 316L/4435

    Supra 316L/4432 Supra 316/4436

    Supra 444/ 4521

    Yi el

    d st

    re ng

    th R

    p0 .2

    ( M

    Pa )

    Moda 439/4510

    Moda 4510 Moda 4511

    Core 434/ 4113Core 441/4509

    Core 301/4310

    Core 321/4541

    Core 439M1

    Core 46222

    Supra 316plus2

    Ultra 6XN

    Core – Corrosive environments

    Supra – Highly corrosive environments

    Ultra – Extremely corrosive environments (PRE > 27)

    Forta – Duplex and other high strength (PRE 16 to 43)

    Moda – Mildly corrosive environments

    Elongation vs. corrosion resistance

    Corrosion resistance (PRE)

    Moda 410L/ 4003

    Moda 409/4512

    Moda

    Core 347/4550

    Core 441/ 4509

    Core 46222

    Supra 444/ 4521

    Core

    Core 304LN/4311

    Forta DX 2205

    Ultra 904L

    Ultra 725LN

    Ultra 254 SMO

    Ultra 4565

    Ultra 654 SMO

    100 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60

    20

    15

    0

    25

    40

    45

    50

    55

    60

    65

    Ultra 4439

    Forta SDX 100

    Forta SDX 2507

    aFort LDX 2404

    Forta EDX 2304

    Core 304/4301

    Core 304L/4307

    Core 304L/4306

    Supra 316L/4432 Supra 316/4436

    Supra 316/4401 Supra 316L/4404 Supra 316Ti/4571

    Core 201/4372

    Forta FDX 271

    Ultra 317L

    Forta FDX 251

    Core 439M1

    Moda 439/4510

    Moda 4589

    430/4016 Core 434/ 4113

    30

    Moda 4511

    Supra 316L/4435

    El on

    ga ti

    on A

    80 /A

    50 1

    (% )

    Moda 4510 Moda 4511

    35 301LN/4318

    Core 321/4541 Core 301/4310

    Forta LDX 2101 Forta DX 2304

    Moda 410S/4000

    Supra 316plus2

    Core 305/4303

    Ultra 6XN

    http://www.outokumpu.com/supra

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    Products and dimensions To find the minimum and maximum thickness and width by surface finish for a specific product in the Supra range, please visit steelfinder.outokumpu.com

    Chemical composition

    Table shows Outokumpu typical values.

    For the full chemical composition list for different standards by stainless steel product, see steelfinder.outokumpu.com

    Supra 316/4401 and Supra 316L/4404 are used in the majority of application areas, and are widely available around the world. Some applications require more specific properties, and for this reason a number of other closely related austenitic steels, generally with modified alloying compositions, are also available. These include:

    • Stainless steels containing nitrogen for higher strength • Stainless steels with lower nickel content to promote higher work hardening • Stainless steels with higher nickel content for specialist cryogenic applications or to increase deep drawability • Stainless steels with titanium stabilization to improve corrosion resistance at elevated temperatures

    A nickel-free ferritic alternative, Supra 444/4521, is also available. Supra 444/4512 has good corrosion resistance and excellent deep drawability.

    The typical chemical composition is given as % by mass.

    Corrosion resistance Pitting Resistance Equivalent is calculated using the following formula: PRE = %Cr + 3.3 x %Mo + 16 x %N. All products in the Supra range are suitable for highly corrosive environments.

    Surface finish and other factors determine the actual corrosion resistance of a particular product. Contact us at outokumpu.com/contacts to discuss what product is right for your next project.

    Outokumpu name EN ASTM C Cr Ni Mo N Others Family

    Type UNS

    Key products Supra 316/4401 1.4401 316 S31600 0.04 17.2 10.1 2.1 – – A Supra 316L/4404 1.4404 316L S31603 0.02 17.2 10.1 2.