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Austenitic Stainless Steel.png

Austenitic Stainless Steel

Austenitic stainless steels are iron-carbon alloys that have sufficient inclusions of austenite-stabilizing elements - nickel, manganese, and nitrogen - to create an austenitic substructure. 200 Series stainless steels use manganese and nitrogen to achieve their austenitic structure, whilst 300 Series use nickel.

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Austenitic stainless steel is the most commonly used of all stainless classes and is home to the single most oft-used stainless steel alloy of all - 304, or 18/8. This class is renowned for its corrosion-resistant properties in particular, with many also featuring high strength, good machining and welding properties, good formability, and high-temperature strength.

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These alloys are used across a broad range of industries with marine applications, medical equipment, food service, kitchenware, household appliances, chemical processing, petrochemical refining, sanitaryware, construction, heat exchangers, furnaces, and cryogenic uses just a few examples.

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Integ Metals supplies 31 different grades of austenitic stainless steel in total, so please read below for more information on characteristics and available shapes, or speak to our expert sales team directly.

Austenitic Stainless Steel

201.png

Supplied Shapes

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201

Int'l Equivalents

UNS

Werkstoff

ISO

S20100

1.4372

X12CrMnNiN17-7-5

Characteristics

  • Less nickel than 300 series, with manganese and nitrogen inclusions as replacement, creating a lower-cost alternative with similar properties

  • High mechanical strength

  • Good formability

  • Good corrosion resistance

  • Non-magnetic

201L.png

Supplied Shapes

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201L

Int'l Equivalents

UNS

Werkstoff

ISO

S20103

1.4371

X2CrMnNiN17-7-5

Characteristics

  • A low carbon variant of 201, designed to gain good intergranular corrosion resistance when welding thicker sections

  • ​High mechanical strength​

  • Good formability

  • Good corrosion resistance

  • Non-magnetic

204Cu.png

Supplied Shapes

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204Cu

Int'l Equivalents

UNS

Werkstoff

ISO

S20430

1.4597

X8CrMnCuN17-8-3

Characteristics

  • A chromium-magnesium alloy with additions of 2-4% copper

  • The copper additions improve corrosion resistance and resistance to stress corrosion cracking

  • Good formability with mild magnetic properties occurring when worked 

301.png

Supplied Shapes

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301

Int'l Equivalents

UNS

Werkstoff

ISO

S30100

1.4310

X10CrNi18-8

Characteristics

  • Excellent work-hardening characteristics

  • Excellent corrosion resistance

  • High mechanical strength

  • Good formability

  • Mild magnetic properties may occur when worked 

301Si.png

Supplied Shapes

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301Si

Int'l Equivalents

UNS

Werkstoff

ISO

S3010

1.4310

X10CrNi18-8

Characteristics

  • A 301 variant with an increased addition of silicon, which increases ductility, whilst retaining very good high tensile strength

  • Very good corrosion resistance

  • Very good work hardening properties

  • Mild magnetic properties may occur when worked

302.png

Supplied Shapes

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302

Int'l Equivalents

UNS

Werkstoff

ISO

S30200

1.4310

X10CrNi18-8

Characteristics

  • Excellent corrosion resistance

  • Excellent toughness

  • Good formability

  • Good fabricability

  • Excellent ductility

302HQ.png

Supplied Shapes

  • Coil

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  • Wire

302HQ

Int'l Equivalents

UNS

Werkstoff

ISO

S30430

1.4567

X3CrNiCu18-9-4 

Characteristics

  • Excellent toughness

  • Good ductility

  • Low work-hardening rate

  • Non-magnetic

303.png

Supplied Shapes

  • Round bar

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  • Flat bar

  • Hexagonal bar

  • Sheet

303

Int'l Equivalents

UNS

Werkstoff

ISO

S30300

1.4305

X8CrNiS18-9

Characteristics

  • Free-machining version of standard 18-8 stainless steel

  • Inclusion of sulfur improves machinability at the cost of weldability and corrosion resistance

  • Excellent toughness

  • Mild magnetic properties may occur when worked

303Cu.png

Supplied Shapes

  • Round Bar

  • Square Bar

  • Hexagonal Bar

  • Flat Bar

303Cu

Int'l Equivalents

UNS

Werkstoff

ISO

S30330

1.4570

X6CrNiCuS18-9-2

Characteristics

  • 303Cu is a variation of 303, with the addition of copper to improve corrosion resistance

  • The copper inclusion also improves machining, lending this grade to suitability for high-speed automatic machining

303Se.png

Supplied Shapes

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  • Round, square, and rectangular wire

303SE

Int'l Equivalents

UNS

Werkstoff

ISO

S30323

-

X10CrNiS18-9

Characteristics

  • 303Se is a variation of 303, with the addition of selenium to increase formability.

  • The selenium inclusion also improves machinability and provides a smoother post-machining surface finish

304.png

Supplied Shapes

  • Plate

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  • Round, square, hexagonal, and rectangular bar

  • Pipe

  • Round, rectangular, & square tube

304

Int'l Equivalents

UNS

Werkstoff

ISO

S30400

1.4301

X5CrNi18-10 

Characteristics

  • Low-carbon stainless steel which reduces post-weld intergranular corrosion

  • Excellent weldability

  • Excellent formability

  • Excellent ability to form complex shapes.

  • Good machinability

304Cu.png

Supplied Shapes

  • Rod

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  • Billet

304CU

Int'l Equivalents

UNS

JIS

ISO

S30430

SUS XM7

-

Characteristics

  • 304Cu is a variation of 304, with the addition of copper to improve corrosion resistance

  • The copper inclusion also improves machining, and offers greater ductility for severe cold-heading

  • Exhibits good weldability

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Supplied Shapes

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304H

Int'l Equivalents

UNS

Werkstoff

ISO

S30409

1.4948

X6CrNi18-11

Characteristics

  • 304H is a variant of 304, with a higher inclusion of carbon to improve both high and low temperature performance

  • Increased tensile and yield strength over 304

  • Good creep resistance

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Supplied Shapes

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304L

Int'l Equivalents

UNS

Werkstoff

ISO

S30403

1.4306/1.4307

X2CrNi18-9

Characteristics

  • 304L is the low-carbon variant of 304, which both improves weldability - especially on thick sections - and increases formability

  • Excellent corrosion resistance

  • Good ductility

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Supplied Shapes

  • Flat, square, and round wire

304V

Int'l Equivalents

UNS

Werkstoff

ISO

-

-

-

Characteristics

  • 304V is a 304 variant which has been melted by electric arc melting and then remelted by VAR

  • Double remelting gives this alloy a uniform chemistry, with purity and homogeneity, thereby offering greater product reliability

305.png

Supplied Shapes

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305

Int'l Equivalents

UNS

Werkstoff

ISO

S30500

1.4303

X8CrNi18-12

Characteristics

  • 305 is a high-nickel chromium-nickel alloy that allows deep-drawing and reduces work-hardening

  • Good corrosion resistance

  • Non-magnetic, with mild magnetic properties occurring during work-hardening

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Supplied Shapes

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309

Int'l Equivalents

UNS

Werkstoff

ISO

S30900

1.4829

X15CrNi23-13

Characteristics

  • 309 is a chromium-nickel alloy formulated to offer good heat-resistant properties

  • Excellent corrosion and oxidation resistance

  • High tensile strength

  • Good creep resistance

309S.png

Supplied Shapes

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309S

Int'l Equivalents

UNS

Werkstoff

ISO

S30908

1.4828

X15CrNiSi20-12

Characteristics

  • 309S is a variant of 309 with a lower carbon content, created to reduce carbide precipitation during welding

  • Excellent corrosion resistance

  • High tensile strength

310.png

Supplied Shapes

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310

Int'l Equivalents

UNS

Werkstoff

ISO

S31000

1.4841

X15CrNiSi25-20

Characteristics

  • 310 is a chromium-nickel alloy formulated for exceptional corrosion, oxidation, and carburization resistance at elevated temperatures.

  • Dry service ceiling of 1100℃

  • Good high-temperature creep strength

310S.png

Supplied Shapes

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310S

Int'l Equivalents

UNS

Werkstoff

ISO

S31008

1.4845

X8CrNi25-21

Characteristics

  • 310S is a variant of 310 with a lower carbon content, created to reduce carbide precipitation during welding

  • Excellent high-temperature corrosion and oxidation resistance

  • Superior strength at elevated temperatures

310H.png

Supplied Shapes

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310H

Int'l Equivalents

UNS

Werkstoff

ISO

S31009

1.4845

-

Characteristics

  • 310H is a variant of 310 with a higher carbon content to offer greater creep strength

  • Excellent high-temperature corrosion and oxidation resistance, especially where sulfur dioxide gas is present 

314.png

Supplied Shapes

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314

Int'l Equivalents

UNS

Werkstoff

ISO

S31400

1.4841

X15CrNiSi25-20

Characteristics

  • 314 is a chromium-nickel-silicon alloy, formulated for high-temperature corrosion resistance to severe environments

  • Good mechanical properties and creep-resistance at high temperatures

316.png

Supplied Shapes

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316

Int'l Equivalents

UNS

Werkstoff

ISO

S31600

1.4401

X3CrNiMo17-13-3

Characteristics

  • ​316 is a chromium-nickel-molybdenum alloy, created to extend the mechanical properties of 304 at high temperatures and increase its corrosion resistance

  • The molybdenum addition increases the resistance to chloride pitting

316H.png

Supplied Shapes

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316H

Int'l Equivalents

UNS

Werkstoff

ISO

S31609

1.4919

X6CrNiMo17-12

Characteristics

  • 316H is a high carbon variant of 316, created to increase both tensile and yield strength at higher temperatures

  • Excellent toughness, even at cryogenic temperatures

  • Excellent corrosion resistance

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Supplied Shapes

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316Ti

Int'l Equivalents

UNS

Werkstoff

ISO

S31635

1.4571

X6CrNiMoTi17-12-2

Characteristics

  • 316Ti is a 316 variant with the addition of titanium to stabilize the structure of the alloy over 800℃

  • Increased corrosion resistance over 316, with greater resistance to sensitisation

  • Enhanced strength at elevated temperatures

316L.png

Supplied Shapes

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316L

Int'l Equivalents

UNS

Werkstoff

ISO

S31603

1.4404

X2CrNiMo17-12-2

Characteristics

  • 316L is a 316 variant with lower carbon inclusion to prevent grain boundary carbide precipitation and improve the quality of weldments

  • Ideal material for weldments on thicker sections

  • Improved corrosion resistance, especially in chloride-rich conditions

317L.png

Supplied Shapes

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317L

Int'l Equivalents

UNS

Werkstoff

ISO

S31703

1.4438

X2CrNiMo18-15-4

Characteristics

  • 317L is a chromium-nickel austenitic alloy with a lower carbon content to prevent grain boundary carbide precipitation

  • Used in situations where post-welding annealing is not possible

  • Excellent corrosion and oxidation resistance at elevated temperatures

321.png

Supplied Shapes

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321

Int'l Equivalents

UNS

Werkstoff

ISO

S3210

1.4541

X6CrNiTi18-10

Characteristics

  • 321 is a chromium-nickel alloy with titanium inclusions to stabilise the alloy at elevated temperatures

  • Titanium inclusion prevents intergranular carbide precipitation, increasing weld strength

  • No post-welding annealing required

  • Excellent corrosion and oxidation resistance at high temperatures

  • Good high-temperature creep strength

321H.png

Supplied Shapes

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321H

Int'l Equivalents

UNS

Werkstoff

ISO

S32109

1.4878

X12CrNiTi18-9

Characteristics

  • 321H is a 321 variant with a greater carbon inclusion, formulated to offer greater creep resistance at high temperatures

  • Good low temperature toughness

  • Good ductility and formability

330.png

Supplied Shapes

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330

Int'l Equivalents

UNS

Werkstoff

ISO

N08330

1.4886

X12NiCrSi35-16

Characteristics

  • 330 is a chromium-nickel alloy with additions of silicon to increase resistance to high temperature oxidation and carburisation

  • High nickel content further prevents stress-corrosion cracking and embrittlement

  • Low coefficient of expansion

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Supplied Shapes

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347

Int'l Equivalents

UNS

Werkstoff

ISO

S34700

1.4550

X6CrNiNb18-10

Characteristics

  • 347 is a chromium nickel alloy that is stabilised with niobium

  • The niobium inclusion helps prevent chromium carbide precipitation

  • Good resistance to intergranular attack

  • Negates need for post-weld annealing

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