Stainless Steel Specifications  
 

EN-standard
Steel no. k.h.s DIN

EN-standard
Steel name

SAE grade

UNS

 

 

440A

S44002

1.4112

 

440B

S44003

1.4125

 

440C

S44004

 

 

440F

S44020

1.4016

X6Cr17

430

S43000

1.4512

X6CrTi12

409

S40900

 

 

410

S41000

1.4310

X10CrNi18-8

301

S30100

1.4318

X2CrNiN18-7

301LN

N/A

1.4307

X2CrNi18-9

304L

S30403

1.4306

X2CrNi19-11

304L

S30403

1.4311

X2CrNiN18-10

304LN

S30453

1.4301

X5CrNi18-10

304

S30400

1.4948

X6CrNi18-11

304H

S30409

1.4303

X5CrNi18-12

305

S30500

 

X5CrNi30-9

312

 

1.4541

X6CrNiTi18-10

321

S32100

1.4878

X12CrNiTi18-9

321H

S32109

1.4404

X2CrNiMo17-12-2

316L

S31603

1.4401

X5CrNiMo17-12-2

316

S31600

1.4406

X2CrNiMoN17-12-2

316LN

S31653

1.4432

X2CrNiMo17-12-3

316L

S31603

1.4435

X2CrNiMo18-14-3

316L

S31603

1.4436

X3CrNiMo17-13-3

316

S31600

1.4571

X6CrNiMoTi17-12-2

316Ti

S31635

1.4429

X2CrNiMoN17-13-3

316LN

S31653

1.4438

X2CrNiMo18-15-4

317L

S31703

1.4539

X1NiCrMoCu25-20-5

904L

N08904

1.4547

X1CrNiMoCuN20-18-7

N/A

S31254


  • 100 Series—austenitic chromium-nickel-manganese alloys
  • Type 101—austenitic that is hardenable through cold working for furniture
  • Type 102—austenitic general purpose stainless steel working for furniture
  • 200 Series—austenitic chromium-nickel-manganese alloys
  • Type 201—austenitic that is hardenable through cold working
  • Type 202—austenitic general purpose stainless steel
  • 300 Series—austenitic chromium-nickel alloys
  • Type 301—highly ductile, for formed products. Also hardens rapidly during mechanical working. Good weldability. Better wear resistance and fatigue strength than 304.
  • Type 302—same corrosion resistance as 304, with slightly higher strength due to additional carbon.
  • Type 303—free machining version of 304 via addition of sulfur and phosphorus. Also referred to as "A1" in accordance with ISO 3506.[10]
  • Type 304—the most common grade; the classic 18/8 stainless steel. Also referred to as "A2" in accordance with ISO 3506.[10]
  • Type 304L— same as the 304 grade but contains less carbon to increase weldability. Is slightly weaker than 304.
  • Type 304LN—same as 304L, but also nitrogen is added to obtain a much higher yield and tensile strength than 304L.
  • Type 308—used as the filler metal when welding 304
  • Type 309—better temperature resistance than 304, also sometimes used as filler metal when welding dissimilar steels, along with inconel.
  • Type 316—the second most common grade (after 304); for food and surgical stainless steel uses; alloy addition of molybdenum prevents specific forms of corrosion. It is also known as marine grade stainless steel due to its increased resistance to chloride corrosion compared to type 304. 316 is often used for building nuclear reprocessing plants. 316L is an extra low carbon grade of 316, generally used in stainless steel watches and marine applications due to its high resistance to corrosion. Also referred to as "A4" in accordance with ISO 3506.[10] 316Ti includes titanium for heat resistance, therefore it is used in flexible chimney liners.
  • Type 321—similar to 304 but lower risk of weld decay due to addition of titanium. See also 347 with addition of niobium for desensitization during welding.
  • 400 Series—ferritic and martensitic chromium alloys
  • Type 405— ferritic for welding applications
  • Type 408—heat-resistant; poor corrosion resistance; 11% chromium, 8% nickel.
  • Type 409—cheapest type; used for automobile exhausts; ferritic (iron/chromium only).
  • Type 410—martensitic (high-strength iron/chromium). Wear-resistant, but less corrosion-resistant.
  • Type 416—easy to machine due to additional sulfur
  • Type 420—Cutlery Grade martensitic; similar to the Brearley's original rustless steel. Excellent polishability.
  • Type 430—decorative, e.g., for automotive trim; ferritic. Good formability, but with reduced temperature and corrosion resistance.
  • Type 439—ferritic grade, a higher grade version of 409 used for catalytic converter exhaust sections. Increased chromium for improved high temperature corrosion/oxidation resistance.
  • Type 440—a higher grade of cutlery steel, with more carbon, allowing for much better edge retention when properly heat-treated. It can be hardened to approximately Rockwell 58 hardness, making it one of the hardest stainless steels. Due to its toughness and relatively low cost, most display-only and replica swords or knives are made of 440 stainless. Also known as razor blade steel. Available in four grades: 440A, 440B, 440C, and the uncommon 440F (free machinable). 440A, having the least amount of carbon in it, is the most stain-resistant; 440C, having the most, is the strongest and is usually considered more desirable in knifemaking than 440A, except for diving or other salt-water applications.
  • Type 446—For elevated temperature service
  • 500 Series—heat-resisting chromium alloys
  • 600 Series—martensitic precipitation hardening alloys
  • 601 through 604: Martensitic low-alloy steels.
  • 610 through 613: Martensitic secondary hardening steels.
  • 614 through 619: Martensitic chromium steels.
  • 630 through 635: Semiaustenitic and martensitic precipitation-hardening stainless steels.
  • Type 630 is most common PH stainless, better known as 17-4; 17% chromium, 4% nickel.
  • 650 through 653: Austenitic steels strengthened by hot/cold work.
  • 660 through 665: Austenitic superalloys; all grades except alloy 661 are strengthened by second-phase precipitation.
  • Type 2205— the most widely used duplex (ferritic/austenitic) stainless steel grade. It has both excellent corrosion resistance and high strength.


Stainless steel designations[11]

SAE designation

UNS designation

 % Cr

 % Ni

 % C

 % Mn

 % Si

 % P

 % S

 % N

Other

Austenitic

201

S20100

16–18

3.5–5.5

0.15

5.5–7.5

0.75

0.06

0.03

0.25

-

202

S20200

17–19

4–6

0.15

7.5–10.0

0.75

0.06

0.03

0.25

-

205

S20500

16.5–18

1–1.75

0.12–0.25

14–15.5

0.75

0.06

0.03

0.32–0.40

-

301

S30100

16–18

6–8

0.15

2

0.75

0.045

0.03

-

-

302

S30200

17–19

8–10

0.15

2

0.75

0.045

0.03

0.1

-

302B

S30215

17–19

8–10

0.15

2

2.0–3.0

0.045

0.03

-

-

303

S30300

17–19

8–10

0.15

2

1

0.2

0.15 min

-

Mo 0.60 (optional)

303Se

S30323

17–19

8–10

0.15

2

1

0.2

0.06

-

0.15 Se min

304

S30400

18–20

8–10.50

0.08

2

0.75

0.045

0.03

0.1

-

304L

S30403

18–20

8–12

0.03

2

0.75

0.045

0.03

0.1

-

304Cu

S30430

17–19

8–10

0.08

2

0.75

0.045

0.03

-

3–4 Cu

304N

S30451

18–20

8–10.50

0.08

2

0.75

0.045

0.03

0.10–0.16

-

305

S30500

17–19

10.50–13

0.12

2

0.75

0.045

0.03

-

-

308

S30800

19–21

10–12

0.08

2

1

0.045

0.03

-

-

309

S30900

22–24

12–15

0.2

2

1

0.045

0.03

-

-

309S

S30908

22–24

12–15

0.08

2

1

0.045

0.03

-

-

310

S31000

24–26

19–22

0.25

2

1.5

0.045

0.03

-

-

310S

S31008

24–26

19–22

0.08

2

1.5

0.045

0.03

-

-

314

S31400

23–26

19–22

0.25

2

1.5–3.0

0.045

0.03

-

-

316

S31600

16–18

10–14

0.08

2

0.75

0.045

0.03

0.10

2.0–3.0 Mo

316L

S31603

16–18

10–14

0.03

2

0.75

0.045

0.03

0.10

2.0–3.0 Mo

316F

S31620

16–18

10–14

0.08

2

1

0.2

0.10 min

-

1.75–2.50 Mo

316N

S31651

16–18

10–14

0.08

2

0.75

0.045

0.03

0.10–0.16

2.0–3.0 Mo

317

S31700

18–20

11–15

0.08

2

0.75

0.045

0.03

0.10 max

3.0–4.0 Mo

317L

S31703

18–20

11–15

0.03

2

0.75

0.045

0.03

0.10 max

3.0–4.0 Mo

321

S32100

17–19

9–12

0.08

2

0.75

0.045

0.03

0.10 max

Ti 5(C+N) min, 0.70 max

329

S32900

23–28

2.5–5

0.08

2

0.75

0.04

0.03

-

1–2 Mo

330

N08330

17–20

34–37

0.08

2

0.75–1.50

0.04

0.03

-

-

347

S34700

17–19

9–13

0.08

2

0.75

0.045

0.030

-

Nb + Ta, 10 x C min, 1 max

348

S34800

17–19

9–13

0.08

2

0.75

0.045

0.030

-

Nb + Ta, 10 x C min, 1 max, but 0.10 Ta max; 0.20 Ca

384

S38400

15–17

17–19

0.08

2

1

0.045

0.03

-

-


Ferritic

405

S40500

11.5–14.5

-

0.08

1

1

0.04

0.03

-

0.1–0.3 Al, 0.60 max

409

S40900

10.5–11.75

0.05

0.08

1

1

0.045

0.03

-

Ti 6 x C, but 0.75 max

429

S42900

14–16

0.75

0.12

1

1

0.04

0.03

-

-

430

S43000

16–18

0.75

0.12

1

1

0.04

0.03

-

-

430F

S43020

16–18

-

0.12

1.25

1

0.06

0.15 min

-

0.60 Mo (optional)

430FSe

S43023

16–18

-

0.12

1.25

1

0.06

0.06

-

0.15 Se min

434

S43400

16–18

-

0.12

1

1

0.04

0.03

-

0.75–1.25 Mo

436

S43600

16–18

-

0.12

1

1

0.04

0.03

-

0.75–1.25 Mo; Nb+Ta 5 x C min, 0.70 max

442

S44200

18–23

-

0.2

1

1

0.04

0.03

-

-

446

S44600

23–27

0.25

0.2

1.5

1

0.04

0.03

-

-

Martensitic

403

S40300

11.5–13.0

0.60

0.15

1

0.5

0.04

0.03

-

-

410

S41000

11.5–13.5

0.75

0.15

1

1

0.04

0.03

-

-

414

S41400

11.5–13.5

1.25–2.50

0.15

1

1

0.04

0.03

-

-

416

S41600

12–14

-

0.15

1.25

1

0.06

0.15 min

-

0.060 Mo (optional)

416Se

S41623

12–14

-

0.15

1.25

1

0.06

0.06

-

0.15 Se min

420

S42000

12–14

-

0.15 min

1

1

0.04

0.03

-

-

420F

S42020

12–14

-

0.15 min

1.25

1

0.06

0.15 min

-

0.60 Mo max (optional)

422

S42200

11.0–12.5

0.50–1.0

0.20–0.25

0.5–1.0

0.5

0.025

0.025

-

0.90–1.25 Mo; 0.20–0.30 V; 0.90–1.25 W

431

S41623

15–17

1.25–2.50

0.2

1

1

0.04

0.03

-

-

440A

S44002

16–18

-

0.60–0.75

1

1

0.04

0.03

-

0.75 Mo

440B

S44003

16–18

-

0.75–0.95

1

1

0.04

0.03

-

0.75 Mo

440C

S44004

16–18

-

0.95–1.20

1

1

0.04

0.03

-

0.75 Mo

Heat resisting

501

S50100

4–6

-

0.10 min

1

1

0.04

0.03

-

0.40–0.65 Mo

502

S50200

4–6

-

0.1

1

1

0.04

0.03

-

0.40–0.65 Mo

Martensitic precipitation hardening

630

S17400

15-17

3-5

0.07

1

1

0.04

0.03

-

Cu 3-5, Ta 0.15-0.45 12

Stainless steel finishes
316L stainless steel, with an unpolished, mill finish.
Standard mill finishes can be applied to flat rolled stainless steel directly by the rollers and by mechanical abrasives. Steel is first rolled to size and thickness and then annealed to change the properties of the final material. Any oxidation that forms on the surface (scale) is removed by pickling, and the passivation layer is created on the surface. A final finish can then be applied to achieve the desired aesthetic appearance.

  • No. 0 - Hot rolled, annealed, thicker plates
  • No. 1 - Hot rolled, annealed and passivated
  • No. 2D - Cold rolled, annealed, pickled and passivated
  • No. 2B - Same as above with additional pass-through highly polished rollers
  • No. 2BA - Bright annealed (BA or 2R) same as above then Bright annealed under Oxygen-free atmospheric conditions
  • No. 3 - Coarse abrasive finish applied mechanically
  • No. 4 - Brushed finish
  • No. 5 - Satin finish
  • No. 6 - Matte finish
  • No. 7 - Reflective finish
  • No. 8 - Mirror finish
  • No. 9 - Bead blast finish
  • No. 10 - heat colored finish-wide range of electropolished & heat colored surfaces
 
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