Stainless Steel Chemical Composition Chart

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Stainless Steel Chemical Composition Chart

The elemental chemical composition of stainless steel is mainly composed of Ferrum (Fe) and Chromium (Cr), other alloy elements in the chemical composition also include Carbon (C), Silicon (Si), Manganese (Mn), Phosphorus (P), Sulfur (S), Nickel (Ni), Molybdenum (Mo), Titanium (Ti), Nitrogen (N), and Cuprum (Cu), etc. Only when the Cr percentage composition reaches a certain value, the steel has corrosion resistance. Therefore, stainless steel metal generally has a Chromium content of minimum 10.5%.

The following table lists the chemical composition of stainless steel alloys, including austenitic SS 304, 304L 316, 316L, 321, 303, 302, 301, 904L, 201, etc., martensitic SS 440A, 440B, 440C, 420 etc., ferritic SS 430, duplex stainless steel 2205, 2507, 329, etc.

Note: Maximum ““, unless range (Min-Max) or minimum (≥) is indicated.

Stainless Steel Chemical Composition Chart, Percentage (%)
Stainless Steel C, ≤ Mn, ≤ P, ≤ S, ≤ Si, ≤ Cr Ni Mo N, ≤ Other Elements, ≤
304 0.08 2.00 0.045 0.03 1.00 18.0-20.0 8.0-11.0
304L 0.03 2.00 0.045 0.03 1.00 18.0-20.0 8.0-12.0
316 0.08 2.00 0.045 0.030 1.00 16.0-18.0 10.0-14.0 2.00-3.00
316L 0.03 2.00 0.045 0.030 1.00 16.0-18.0 10.0-14.0 2.00-3.00
321 0.08 2.00 0.045 0.03 1.00 17.0-19.0 9.0-12.0 0.10 ≥ Ti 5×(C+N), ≤ 0.70
201 0.15 5.50-7.50 0.06 0.03 1.00 16.0-18.0 3.5-5.5 0.25
202 0.15 7.50-10.00 0.06 0.03 1.00 17.0-19.0 4.0-6.0 0.25
205 0.12-0.25 14.0-15.5 0.06 0.03 1.00 16.5-18.0 1.0-1.7 0.32-0.40
301 0.15 2.00 0.045 0.03 1.00 16.0-18.0 6.0-8.0 0.10
301L 0.03 2.00 0.045 0.03 1.00 16.0-18.0 6.0-8.0 0.20
301LN 0.03 2.00 0.045 0.03 1.00 16.0-18.0 6.0-8.0 0.07-0.20
302 0.15 2.00 0.045 0.03 0.75 17.0-19.0 8.0-10.0 0.10
302B 0.15 2.00 0.045 0.03 2.00-3.00 17.0-19.0 8.0-10.0 0.10
303 0.15 2.00 0.2 ≥0.15 1.00 17.0-19.0 8.0-10.0
303Se 0.15 2.00 0.2 0.06 1.00 17.0-19.0 8.0-10.0 Se 0.15
304H 0.04-0.10 2.00 0.045 0.03 0.75 18.0-20.0 8.0-10.5
304N 0.08 2.00 0.045 0.03 1.00 18.0-20.0 8.0-11.0 0.10-0.16
304LN 0.03 2.00 0.045 0.03 1.00 18.0-20.0 8.0-11.0 0.10-0.16
305 0.12 2.00 0.045 0.03 1.00 17.0-19.0 11.0-13.0
308 0.08 2.00 0.045 0.03 1.00 19.0-21.0 10.0-12.0
309 0.2 2.00 0.045 0.03 1.00 22.0-24.0 12.0-15.0
309S 0.08 2.00 0.045 0.03 1.00 22.0-24.0 12.0-15.0
309H 0.04-0.10 2.00 0.045 0.03 0.75 22.0-24.0 12.0-15.0
309Cb 0.08 2.00 0.045 0.03 1.00 22.0-24.0 12.0-16.0 ≥ Cb 10 x C, ≤1.10
309HCb 0.04-0.10 2.00 0.045 0.03 0.75 22.0-24.0 12.0-16.0 ≥ Cb 10 x C, ≤1.10
310 0.25 2.00 0.045 0.03 1.5 24.0-26.0 19.0-22.0
310S 0.08 2.00 0.045 0.03 1.5 24.0-26.0 19.0-22.0
310H 0.04-0.10 2.00 0.045 0.03 0.75 24.0-26.0 19.0-22.0
310Cb 0.08 2.00 0.045 0.03 1.5 24.0-26.0 19.0-22.0 ≥ Cb 10 x C, ≤ 1.10
310 MoLN 0.02 2.00 0.03 0.01 0.5 24.0-26.0 20.5-23.5 1.60-2.60 0.09-0.15
314 0.25 2.00 0.045 0.03 1.50-3.00 23.0-26.0 19.0-22.0
316H 0.04-0.10 2.00 0.045 0.03 0.75 16.0-18.0 10.0-14.0 2.00-3.00
316Ti 0.08 2.00 0.045 0.03 1.00 16.0-18.0 10.0-14.0 2.00-3.00 0.1 ≥ Ti 5 × (C + N), ≤0.70
316Cb 0.08 2.00 0.045 0.03 1.00 16.0-18.0 10.0-14.0 2.00-3.00 0.1 ≥ Cb 10 × C, ≤ 1.10
316N 0.08 2.00 0.045 0.03 1.00 16.0-18.0 10.0-14.0 2.00-3.00 0.10-0.16
316LN 0.03 2.00 0.045 0.03 1.00 16.0-18.0 10.0-13.0 2.00-3.00 0.10-0.16
317 0.08 2.00 0.045 0.03 1.00 18.0-20.0 11.0-15.0 3.0-4.0 0.1
317L 0.03 2.00 0.045 0.03 0.75 18.0-20.0 11.0-15.0 3.0-4.0 0.1
317LM 0.03 2.00 0.045 0.03 0.75 18.0-20.0 13.5-17.5 4.0-5.0 0.2
317LMN 0.03 2.00 0.045 0.03 0.75 17.0-20.0 13.5-17.5 4.0-5.0 0.10-0.20
317LN 0.03 2.00 0.045 0.03 0.75 18.0-20.0 11.0-15.0 3.0-4.0 0.10-0.22
321 0.08 2.00 0.045 0.03 1.00 17.0-19.0 9.0-12.0 0.1 ≥ Ti 5 × (C + N), ≤ 0.70
321H 0.04-0.10 2.00 0.045 0.03 0.75 17.0-19.0 9.0-12.0 ≥ Ti 4 × (C + N), ≤ 0.70
334 0.08 1.00 0.03 0.015 1.00 18.0-20.0 19.0-21.0 Al 0.15-0.60, Ti 0.15-0.60
347 0.08 2.00 0.045 0.03 1.00 17.0-19.0 9.0-12.0 ≥ Cb 10 × C, ≤ 1.00
347H 0.04-0.10 2.00 0.045 0.03 0.75 17.0-19.0 9.0-13.0 ≥ Cb 8 × C, ≤ 1.00
347LN 0.005-0.020 2.00 0.045 0.03 1.00 17.0-19.0 9.0-13.0 0.06-0.10 Cb 0.20-0.50, 15 × C ≥
348 0.08 2.00 0.045 0.03 1.00 17.0-19.0 9.0-12.0 Cb 10×C-1.10, Ta 0.10, Co 0.20
348H 0.04-0.10 2.00 0.045 0.03 0.75 17.0-19.0 9.0-13.0 (Cb + Ta) 8×C ≥ , 1.00 ≤, Ta 0.10, Co 0.20
2205 0.03 2.00 0.03 0.02 1.00 22.0-23.0 4.5-6.5 3.0-3.5 0.14-0.20
2304 0.03 2.5 0.04 0.03 1.00 21.5-24.5 3.0-5.5 0.05-0.60 0.05-0.60
255 0.04 1.5 0.04 0.03 1.00 24.0-27.0 4.5-6.5 2.9-3.9 0.10-0.25 Cu 1.50-2.50
2507 0.03 1.2 0.035 0.02 0.8 24.0-26.0 6.0-8.0 3.0-5.0 0.24-0.32 Cu ≤0.50
329 0.08 1.00 0.04 0.03 0.75 23.0-28.0 2.0-5.00 1.00-2.00
403 0.15 1.00 0.04 0.03 0.5 11.5-13.0
405 0.08 1.00 0.04 0.03 1.00 11.5-14.5 ≤0.5 Al 0.10-0.30
410 0.08-0.15 1.00 0.04 0.03 1.00 11.5-13.5
410S 0.08 1.00 0.04 0.03 1.00 11.5-13.5 ≤0.6
414 0.15 1.00 0.04 0.03 1.00 11.5-13.5 1.25-2.50
416 0.15 1.25 0.06 ≥0.15 1.00 12.0-14.0
416Se 0.15 1.25 0.06 ≥0.06 1.00 12.0-14.0 Se 0.15
420 0.15, ≥ 1.00 0.04 0.03 1.00 12.0-14.0
420F 0.30-0.40 1.25 0.06 ≥0.15 1.00 12.0-14.0 ≤0.5 Cu 0.60
420FSe 0.20-0.40 1.25 0.06 0.15 1.00 12.0-14.0 ≤0.5 Se 0.15; Cu 0.60
422 0.20-0.25 0.50-1.00 0.025 0.025 0.5 11.0-12.5 0.50-1.00 0.90-1.25 V (0.20-0.30), W (0.90-1.25)
429 0.12 1.00 0.04 0.03 1.00 14.0-16.0
430 0.12 1.00 0.04 0.03 1.00 16.0-18.0
430F 0.12 1.25 0.06 ≥0.15 1.00 16.0-18.0
430FSe 0.12 1.25 0.06 0.06 1.00 16.0-18.0 Se 0.15
439 0.03 1.00 0.04 0.03 1.00 17.0-19.0 ≤0.5 0.03 ≥ Ti [0.20+4(C+N)], ≤ 1.10; Al 0.15
431 0.2 1.00 0.04 0.03 1.00 15.0-17.0 1.25-2.50
434 0.12 1.00 0.04 0.03 1.00 16.0-18.0 0.75-1.25
436 0.12 1.00 0.04 0.03 1.00 16.0-18.0 0.75-1.25 ≥ Cb 5×C, ≤ 0.80
440A 0.60-0.75 1.00 0.04 0.03 1.00 16.0-18.0 ≤0.75
440B 0.75-0.95 1.00 0.04 0.03 1.00 16.0-18.0 ≤0.75
440C 0.95-1.20 1.00 0.04 0.03 1.00 16.0-18.0 ≤0.75
440F 0.95-1.20 1.25 0.06 0.15 1.00 16.0-18.0 ≤0.5 Cu ≤0.60
440FSe 0.95-1.20 1.25 0.06 0.06 1.00 16.0-18.0 ≤0.5 Se ≤0.15; Cu ≤0.60
442 0.2 1.00 0.04 0.04 1.00 18.0-23.0 ≤0.6
444 0.025 1.00 0.04 0.03 1.00 17.5-19.5 ≤1.00 1.75-2.50 0.035 Ti+Cb 0.20+4 × (C+N)-0.80
446 0.2 1.5 0.04 0.03 1.00 23.0-27.0 ≤0.75 0.25
800 0.1 1.5 0.045 0.015 1.00 19.0-23.0 30.0-35.0 Cu 0.75; ≥ FeH 39.5; Al 0.15-0.60
800H 0.05-0.10 1.5 0.045 0.015 1.00 19.0-23.0 30.0-35.0 Cu 0.75; ≥ FeH 39.5; Al 0.15-0.60
904L 0.02 2.00 0.045 0.035 1.00 19.0-23.0 23.0-28.0 4.00-5.00 0.1 Cu 1.00-2.00
Alloy 20 0.07 2.00 0.045 0.035 1.00 19.0-21.0 32.0-38.0 2.00-3.00 Cu 3.0-4.0; ≥ Nb 8 × C; ≤1.00
XM-1 0.08 5.0-6.5 0.04 0.18-0.35 1.00 16.00-18.0 5.0-6.5 Cu 1.75-2.25
XM-2 0.15 2.00 0.05 0.11-0.16 1.00 17.0-19.0 8.0-10.0 0.40-0.60 Al 0.60-1.00
XM-5 0.15 2.5-4.5 0.2 ≥0.25 1.00 17.0-19.0 7.0-10.0
XM-6 0.15 1.50-2.50 0.06 ≥0.15 1.00 12.0-14.0
XM-10 0.08 8.0-10.0 0.045 0.03 1.00 19.0-21.5 5.5-7.5 0.15-0.40
XM-11 0.04 8.0-10.0 0.045 0.03 1.00 19.0-21.5 5.5-7.5 0.15-0.40
XM-15 0.08 2.00 0.03 0.03 1.50-2.50 17.0-19.0 17.5-18.5
XM-17 0.08 7.50-9.00 0.045 0.03 0.75 17.5-22.0 5.0-7.0 2.00-3.00 0.25-0.50
XM-18 0.03 7.50-9.00 0.045 0.03 0.75 17.5-22.0 5.0-7.0 2.00-3.00 0.25-0.50
XM-19 0.06 4.0-6.0 0.045 0.03 1.00 20.5-23.5 11.5-13.5 1.50-3.00 0.20-0.40 Cb 0.10-0.30, V 0.10-0.30
XM-21 0.08 2.00 0.045 0.03 0.75 18.0-20.0 8.0-10.5 0.16-0.30
XM-27 0.01 0.4 0.02 0.02 0.4 25.0-27.5 ≤0.5 0.75-1.50 0.015 Cu 0.20; Cb 0.05-0.20; (Ni + Cu) 0.50
XM-33 0.06 0.75 0.04 0.02 0.75 25.0-27.0 ≤0.5 0.75-1.50 0.04 Cu 0.20; Ti 0.20-1.00; ≥ Ti 7(C+N)
XM-34 0.08 2.5 0.04 ≥0.15 1.00 17.5-19.5 1.50-2.50
PH 13-8Mo 0.05 0.2 0.01 0.008 0.1 12.25-13.25 7.5-8.5
15-5 PH 0.07 1 0.04 0.03 1 14.0-15.5 3.5-5.5 2.5-4.5 Cu; 0.15-0.45 Nb
17-4 PH 0.07 1 0.04 0.03 1 15.5-17.5 3.0-5.0 3.0-5.0 Cu; 0.15-0.45 Nb
17-7 PH 0.09 1 0.04 0.04 1 16.0-18.0 6.5-7.75 0.75-1.5 Al
Stainless Steel C, ≤ Mn, ≤ P, ≤ S, ≤ Si, ≤ Cr Ni Mo N, ≤ Other Elements, ≤
1 Comment
  1. Science Tech says

    Cool chart. What would be even more helpful is an additional column at the end that says the most common usage for each type of stainless steel.

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