Chemical Composition of Stainless Steel 304, 316, 316L, 304L, 321, 303, 410, 430

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Chemical Composition Chart of Stainless Steel

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

Note: UOS (Unless Otherwise Specified)

Stainless Steel Composition Chart, Percentage (%)
Stainless Steel C, ≤ Mn, ≤ P, ≤ S, ≤ Si, ≤ Cr Ni Mo N, ≤ Other Elements, ≤, UOS
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 8.0-11.0
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 Composition

The main alloying element in the stainless steel composition is Ferrum (Fe) and Chromium (Cr), and 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%. Stainless steel also contains elemental composition such as C, P, S, Ni, Si, Mn, Mo, Ti, N, and Cu, etc. The corrosion resistance of stainless steel decreases with the increase of carbon percentage content. Therefore, the carbon content of most stainless steels is very low, and the maximum C percentage content does not exceed 1.2%.

Chemical Properties

The chemical composition can reflect the chemical properties of stainless steel. The higher the percentage of chromium, nickel and molybdenum, the better the corrosion resistance of stainless steel; the higher the carbon content, the worse the corrosion resistance of stainless steel.

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