Chemical Composition

Standard 300 series austenitic grades

Stainless steel grades Chemical composition % by mass max unless stated
UNS No SAE No AISI No. C Si Mn P S Cr Mo Ni Others
S30100 30301 301 0.15 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.10
S30103 301L 0.03 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.20
S30153 301LN 0.03 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.07/0.20
S30200 30302 302 0.15 0.75 2.00 0.045 0.030 17.0/19.0 8.0/10.0 N 0.10
S30215 30302B 302B 0.15 2.00/ 3.00 2.00 0.045 0.030 17.0/19.0 8.0/10.0
S30300 30303 303 0.15 1.00 2.00 0.20 0.15 min 17.0/19.0 8.0/10.0
S30310 XM-5 (303Plus x) 0.15 1.00 2.50/4.50 0.20 0.25 min 17.00/19.00 7.00/9.00
S30323 30303Se 303Se 0.15 1.00 2.00 0.20 0.060 17.0/19.0 8.0/10.0 Se 0.15 min
S30330 303Cu 0.15 1.00 2.00 0.15 0.10 min 17.0/19.0 6.0/10.0 Cu 2.5/4.0; Se 0.10
S30400 30304 304 0.07 0.75 2.00 0.045 0.030 17.5/19.5 8.0/10.5 N 0.10
S30400 A276 for bar 30304 304 0.08 1.00 2.00 0.045 0.030 18.0/20.0 8.0/11.0
S30403 30304L 304L 0.030 0.75 2.00 0.045 0.030 17.5/19.5 8.0/12.0 N 0.10
S30403 A276 for bar 30304L 304L 0.030 1.00 2.00 0.045 0.030 18.0/20.0 8.0/12.0
S30430 302HQ 0.03 1.00 2.00 0.045 0.030 17.0/19.0 8.0/10.0 Cu 3.0/4.0
S30452 XM-21 (304HN) 0.08 1.00 2.00 0.045 0.030 18.0/20.0 8.00/10.00 N 0.16/0.30
S30453 304LN 0.030 0.75 2.00 0.045 0.030 18.0/20.0 8.0/12.0 N 0.10/0.16
S30454 0.03 1.00 2.00 0.045 0.030 18.0/20.0 8.0/11.0 N 0.16/0.30
S30500 30305 305 0.12 0.75 2.00 0.045 0.030 17.0/19.0 10.5/13.0
S30800 30308 308 0.08 1.00 2.00 0.045 0.030 19.0/21.0 10.0/12.0
S31600 30316 316 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10
S31603 30316L 316L 0.030 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10
S31635 316Ti 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 Ti 5x (C+N) / 0.70 N 0.10
S31640 316Cb 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 Nb 10x C / 1.10 N 0.10
S31653 316LN 0.030 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10/0.16
S31700 30317 317 0.08 0.75 2.00 0.045 0.030 18.0/20.0 3.0/4.0 11.0/15.0 N 0.10
S31703 317L 0.030 0.75 2.00 0.045 0.030 18.0/20.0 3.00/4.00 11.0/15.0 N 0.10
S31725 317LM 0.030 0.75 2.00 0.045 0.030 18.0/20.0 4.0/5.0 13.5/17.5 N 0.20
S31726 317LMN 0.030 0.75 2.00 0.045 0.030 17.0/20.0 4.0/5.0 13.5/17.5 N 0.10/0.20
S31753 317LN 0.030 0.75 2.00 0.045 0.030 18.0/20.0 3.0/4.0 11.0/15.0 N 0.10/0.22
S32100 30321 321 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.0/12.0 Ti 5 x C min/0.70 N 0.10
S34700 30347 347 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.0/13.0 Nb+Ta 10 x C min/1.0
S34720 347F 0.08 1.00 2.00 0.040 0.18/0.35 17.00/19.00 0.75 9.00/12.00 Nb 10xC / 1.10; Cu 0.75; Ta 0.05
S34723 347FSe 0.08 1.00 2.00 0.11/0.17 0.030 17.00/19.00 0.75 9.00/12.00 Nb 10xC / 1.10; Cu 0.75; Se 0.15/0.35; Ta 0.05
S34800 30348 348 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.00/13.0 Nb+Ta 10 x C / 1.00; Ta:0.10 max; Co 0.20
S38400 30384 384 0.04 1.00 2.00 0.045 0.030 15.0/17.0 17.0/19.0

Standard and super-duplex grades

Stainless steel grades Chemical composition % by mass max unless stated
UNS No SAE No AISI No. C Si Mn P S Cr Mo Ni Others
S31803 2205 0.030 1.00 2.00 0.030 0.020 21.0/23.0 2.5/3.5 4.5/6.5 N 0.08/0.20
S32304 2304 0.030 1.00 2.50 0.040 0.030 21.5/24.5 0.05/0.60 3.0/5.5 N 0.05/0.20; Cu 0.05/0.60
S32750 2507 0.030 0.80 1.20 0.035 0.020 24.0/26.0 3.0/5.0 6.0/8.0 N 0.24/0.32; Cu 0.50

Special austenitic grades

Stainless steel grades Chemical composition % by mass max unless stated
UNS No SAE No AISI No. C Si Mn P S Cr Mo Ni Others
N08904 904L 0.020 1.00 2.00 0.045 0.035 19.0/23.0 4.0/5.0 23.0/28.0 Cu 1.0/2.0 N 0.10

Standard ferritic grades

Stainless steel grades Chemical composition % by mass max unless stated
UNS No SAE No AISI No. C Si Mn P S Cr Mo Ni Others
S40300 51403 403 0.15 0.50 1.00 0.040 0.030 11.5/13.0
S40500 51405 405 0.08 1.00 1.00 0.040 0.030 11.5/14.5 Al 0.10./0.30
S40800 0.08 1.00 1.00 0.045 0.045 11.5/13.0 0.50 Ti 12xC/1.10
S40900 409 This well known grade is replaced by S40910 S40920 and S40930
S41008 410S 0.08 1.00 1.00 0.040 0.030 11.5/13.5 0.60
S43000 51430 430 0.12 1.00 1.00 0.040 0.030 16.0/18.0
S43020 51430F 430F 0.12 1.00 1.25 0.060 0.15 min 16.0/18.0 0.75
S43023 51430FSe 430FSe 0.12 1.00 1.25 0.060 0.060 16.0/18.0 Se 0.15
S43036 430Ti 0.10 1.00 1.00 0.040 0.030 16.0/19.5 0.75 Ti 5xC/0.75
S43400 51434 434 0.12 1.00 1.00 0.040 0.030 16.0/18.0 0.75/1.25
S43600 51436 436 0.12 1.00 1.00 0.040 0.030 16.0/18.0 0.75/1.25 Nb+Ta 5xC/0.80
S44200 51442 442 0.20 1.00 1.00 0.040 0.035 18.0/23.0 0.60

Heat resisting grades

Stainless steel grades Chemical composition % by mass max unless stated
UNS No SAE No AISI No. C Si Mn P S Cr Mo Ni Others
S30409 304H 0.04/0.10 0.75 2.00 0.045 0.030 18.0/20.0 8.0/10.5
S30415 153MA 0.04/0.06 1.00/2.00 0.80 0.045 0.030 18.0/19.0 9.0/10.0 N 0.12/0.18; Ce 0.03/0.08
S30451 304N 0.08 0.75 2.00 0.045 0.030 18.0/20.0 8.0/10.5 N 0.10/0.16
S30452 304HN (XM-21) 0.08 0.75 2.00 0.045 0.030 18.0/20.0 8.0/10.5 N 0.16/0.30
S30615 RA85H 0.16/0.24 3.2/4.0 2.00 0.030 0.030 17.0/19.5 13.5/16.0 Al 0.80/1.50
S30815 253MA 0.05/0.10 1.40/2.00 0.80 0.040 0.030 20.0/22.0 10.0/12.0 N 0.14/0.20; Ce 0.03/0.08
S30900 30309 309 0.20 1.00 2.00 0.045 0.030 22.0/24.0 12.0/15.0
S30908 30309S 309S 0.08 0.75 2.00 0.045 0.030 22.0/24.0 12.0/15.0
S30909 309H 0.04/0.10 0.75 2.00 0.045 0.030 22.0/24.0 12.0/15.0
S30940 309Cb 0.08 0.75 2.00 0.045 0.030 22.0/24.0 12.0/16.0 Nb 10xC / 1.10
S30941 309HCb 0.04/0.10 0.75 2.00 0.045 0.030 22.0/24.0 12.0/16.0 Nb 10xC / 1.10
S31000 30310 310 0.25 1.50 2.00 0.045 0.030 24.0/26.0 19.0/22.0
S31008 30310S 310S 0.08 1.50 2.00 0.045 0.030 24.0/26.0 19.0/22.0
S31009 310H 0.04/0.10 0.75 2.00 0.045 0.030 24.0/26.0 19.0/22.0
S31040 310Cb 0.08 1.50 2.00 0.045 0.030 24.0/26.0 19.0/22.0 Nb 10xC / 1.10
S31041 310HCb 0.04/0.10 0.75 2.00 0.045 0.030 24.0/26.0 19.0/22.0 Nb 10xC / 1.10
S31400 30314 314 0.25 1.50/3.00 2.00 0.045 0.030 23.0/26.0 19.0/22.0
S31609 316H 0.04/0.10 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0
S31651 316N 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10/0.16
S32109 321H 0.04/0.10 0.75 2.00 0.045 0.030 17.0/19.0 9.0/12.0 Ti 4x(C+N) / 0.70
S33228 0.04/0.08 0.30 1.00 0.020 0.015 26.0/28.0 31.0/33.0 Al 0.025;Ce 0.05/0.10; Nb 0.6/1.0
S33400 334 0.08 1.00 1.00 0.030 0.015 18.0/22.0 19.0/21.0 Al 0.15/0.60; Ti 0.15/0.60
S34709 347H 0.04/0.10 0.75 2.00 0.045 0.030 17.0/19.0 9.0/13.0 Nb 8xC /1.00
S34800 348 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.0/13.0 Nb+Ta 10xC / 1.00; Ta 0.10; Co 0.20
S34809 348H 0.04/0.10 0.75 2.00 0.045 0.030 17.0/19.0 9.0/13.0 Nb+Ta 10xC /1.00; Ta 0.10; Co 0.20
S35045 0.06/0.10 1.00 1.50 0.045 0.015 25.0/29.0 32.0/37.0 Al 0.15/0.60; Ti 0.15/0.60
S35315 353MA 0.04/0.08 1.20/2.00 2.00 0.040 0.030 24.0/26.0 34.0/36.0 N 0.12/0.18; Ce 0.03/0.10
S41041 0.13/0.18 0.50 0.40/0.60 0.030 0.030 11.50/13.00 0.20 0.50 Al 0.05; Nb 0.15
S41425 0.05 0.50 0.50/1.00 0.020 0.005 12.0/15.0 1.50/2.00 4.0/7.0 N 0.06/0.12; Cu 0.30
S41800 Greek Ascoloy (615) 0.15/0.20 0.50 0.50 0.040 0.030 12.00/14.00 0.50 1.80/2.20 W 2.50/3.50
S42200 616 0.20/0.25 0.50 0.50/1.00 0.025 0.025 11.0/12.5 0.90/1.25 0.50/1.00 V 0.20/0.30; W 0.90/1.25
S42300 Lapelloy (619) 0.27/0.32 0.50 0.95/1.35 0.025 0.025 11.00/12.00 2.50/3.00 0.50 V 0.20/0.30
S44300 MT443 0.20 1.00 1.00 0.040 0.030 18.0/23.0 0.50 Cu 0.90/1.25
S44600 51446 446 0.20 1.00 1.50 0.040 0.030 23.0/27.0 0.75 N 0.25
S64152 XM-32 0.08/0.15 0.35 0.50/0.90 0.025 0.025 11.00/12.50 1.50/2.00 2.00/3.00 N 0.01/0.05; V 0.25/0.40
N08800 800 (332) 0.10 1.00 1.50 0.045 0.015 19.0/23.0 30.0/35.0 Fe 39.5 min; Al 0.15/0.60; Ti 0.15/0.60
N08810 800H 0.05/0.10 1.00 1.50 0.045 0.015 19.0/23.0 30.0/35.0 30.0/35.0 Cu 0.75; Fe 39.5 min; Al 0.15/0.60; Ti 0.15/0.60