Stainless Steel Grade Compositions for Austenitic Stainless

Grade

UNS No.

Typical Composition (%)

Description and Applications

C

Mn

Cr

Mo

Ni

others

301

S30100

0.15

2

16-18

 

6-8

 

Primarily for roll-formed paneling, high strength springs and deep drawn components.

302HQ

S30430

0.01

0.6

17.7

 

9.7

Cu 3

Wire for severe cold heading applications, such as cross-recess screws.

303

S30300

0.06

1.8

18

 

9

S 0.3

Free machining grade for high speed repetition machining. Also available as "Ugima" 303 improved machinability bar for even higher machinability.

304

S30400

0.08

2

18 - 20

 

8-12

 

Standard austenitic grade - good corrosion resistance and excellent fabrication characteristics. Also available as "Ugima" 304 improved machinability bar.

304L

S30403

0.03

2

18 - 20

 

8-12

 

Low carbon version of 304 gives resistance to intergranular corrosion for heavy section welding and high temperature applications.

308L

S30803

0.02

1

19.5

 

10.5

 

Filler wire for welding 304 and similar grades.

309

S30900

0.2

2

22-24

 

12-15

 

Good corrosion resistance and improved resistance to hot sulfur compounds present in oxidizing gases. Filler for welding dissimilar metals.

310

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S31000

0.25

2

24-26

 

19-22

 

Good resistance to oxidation and carburizing atmospheres in temperatures of 850-1100°C.

316

S31600

0.08

2

16-18

2-3

10-14

 

Higher resistance than 304 to many media, particularly those containing chlorides. Also available as "Ugima" 316 improved machinability bar.

316L

S31603

0.03

2

16-18

2-3

10-14

 

Low carbon version of 316 offers excellent intergranular corrosion resistance - for high temperature applications and heavy section welding.

321

S32100

0.05

1

18

 

9

Ti 0.5

Titanium stabilized grade resists intergranular corrosion during exposure at 425 to 850°C. High strength in this temperature range.

347

S34700

0.04

1

18

 

9

Nb 0.7

Niobium stabilized grade resists intergranular corrosion as for 321, but more commonly used as a filler for welding 321.

904L

N08904

0.02

1

20

4.5

24

Cu 1.5

Super austenitic grade having very high corrosion resistance, particularly to warm chlorides and sulfuric acid.

2111HTR

S30815

0.09

0.6

21

 

11

N 0.16
Ce 0.06

Excellent scaling and creep resistance at temperatures up to 1150°C.

 

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