Technical

Info
Conversion Factors
Corrosion Resistance Data
Equivalents of Std Wire Gauges
Fractions of Inches
Hardness Comparison Table
Nominal Composition of SS
Pipe Working Pressures
Useful Conversion Formulae
Theoretical Mass Calculation

Nominal Composition Of Some Common Grades Of Stainless Steel

NOTES

Similar grades (on a basis of composition only) from the ASTM and EN Standards are grouped together.

  1. Nominal compositions are given in this table. These must not be used for specification purposes. For the exact composition, reference must be made to the appropriate specification.
  2. The % content is a maximum unless a compositional range is given.
  3. Common Elements
    • Al = Aluminium
    • C = Carbon
    • Cr = Chromium
    • Cu = Copper
    • Mn = Manganese
    • Mo = Molybdenum
    • N = Nitrogen
    • Nb = Niobium (as Cb = Columbium in American Specifications)
    • Ni = Nickel
    • P = Phosphorus
    • S = Sulphur
    • Se = Selenium
    • Si = Silicon
    • Ti = Titanium
    • V = Vanadium
  4. Only the primary alloying elements (C, Cr, Ni, Mo and N) are individually listed in the table.
  5. All stainless steels contain Si, Mn, P and S. These are controlled to maximum contents of typically 0.75% or 1.0% Si, 2.0% Mn, 0.015% S, 0.045%P. If these elements are intentionally added as alloying elements the higher % content is listed under \"% Other\".
  6. The % content of any other alloying elements that are contained in some of the stainless steels is listed under \"% Other\".
  7. Typical Proprietary Grades (which are commonly referred to in South Africa) are given for the purpose of example only. The inclusion of any such Proprietary Grade must not be interpreted as an endorsement or recommendation; and vice versa, the exclusion of any such Proprietary Grade must not be interpreted as a non-recommendation.
Austenitic Stainless Steels and Austenitic Stainless Alloys
Grade Number UNS Number Grade Designation % C % Cr % Ni % Mo % N % Other
201 S20100 0.15 16.0-18.0 3.5-5.5 - 0.25 5.5-7.5 Mn
1.4372 X12CrMnNiN 17-7-5 0.15 16.0-18.0 3.5-5.5 - 0.05-0.25 5.5-7.5 Mn
201L S20103 0.03 16.0-17.0 3.5-3.5 - 0.25 5.5-7.5 Mn
1.4371 X2CrMnNiN 17-7-5 0.03 16.0-18.0 3.5-5.5 - 0.15-0.25 6.0-8.0 Mn
202 S20200 0.15 17.0-19.0 4.0-6.0 - 0.25 7.5-10.0 Mn
1.4373 X12CrMnNiN 18-9-5 0.15 17.0-19.0 4.0-6.0 - 0.05-0.25 7.5-10.5 Mn
CROMANITE 0.08 18.0-20.0 1 - 0.4-0.6 9.5-11.5 Mn
301 S30100 0.15 16.0-18.0 6.0-8.0 - 0.1 -
1.431 X10CrNi 18-8 0.05 - 0.15 16.0-19.0 6.0-9.5 0.8 0.11 -
1.4318 X2CrNi 18-7 0.03 16.5-18.5 6.0-8.0 - 0.10-0.20 -
303 S30300 0.15 17.0-19.0 8.0-10.0 - - >0.15 S (Free machining properties)
1.4305 X8CrNiS 18-9 0.1 17.0-19.0 8.0-10.0 - 0.11 0.15-0.35 S (Free machining properties)
303Se S30323 0.15 17.0-19.0 8.0-10.0 - - 0.06 S & >0.15 Se (Free machining properties)
304 S30400 0.08 18.0-20.0 8.0-10.5 - 0.10 -
1.4301 X5CrNi 18-10 0.07 17.0-19.5 8.0-10.5 - 0.11 -
304L S30403 0.03 18.0-20.0 10.0-12.0 - 0.10 -
1.4306 X2CrNi 19-11 0.03 18.0-20.0 10.0-12.0 - 0.11 -
304LN S30453 0.03 18.0-20.0 8.0-12.0 - 0.10-0.16 -
1.4311 X2CrNiN 18-10 0.03 17.0-19.0 8.5-11.5 - 0.12-0.22 -
304H S30409 0.04 - 0.10 18.0-20.0 8.0-10.5 - - -
1.4948 X6CrNi 18-10 0.04 - 0.08 17.0-19.0 8.0-11.0 - 0.11 -
305 S30500 0.12 17.0-19.0 10.5-13.0 - - -
1.4303 X4CrNi 18-12 0.06 17.0-19.0 11.0-13.0 - 0.11 -
309 S30900 0.2 22.0-24.0 12.0-15.0 - - -
1.4828 X15CrNiSi 20-12 0.2 19.0-21.0 11.0-13.0 - 0.11 1.5-2.0 Si
309S S30908 0.08 22.0-24.0 12.0-15.0 - - -
1.4833 X12CrNi 23-13 0.15 22.0-24.0 12.0-14.0 - 0.11 -
310 S31000 0.25 24.0-26.0 19.0-22.0 - - 1.5 Si
1.4841 X15CrNiSi 25-21 0.2 24.0-26.0 19.0-22.0 - 0.11 1.5-2.5 Si
310S S31008 0.08 24.0-26.0 19.0-22.0 - - 1.5Si
1.4845 X8CrNi 25-21 0.1 24.0-26.0 19.0-22.0 - 0.11 1.5Si
310MoLN S31050 0.02 24.0-26.0 20.5-23.5 1.6-2.6 0.09-0.15 -
1.4466 X1CrNiMoN 25-22-2 0.02 24.0-26.0 21.0-23.0 2.0-2.5 0.10-0.16 -
*253MA S30815 0.12 20 10 0.12 1.4 Si, Ce
1.4835
316 S31600 0.08 16.0-18.0 10.0-14.0 2.0-3.0 0.1 -
1.4401 X5CrNiMo 17-12-2 0.07 16.5-18.5 10.0-13.0 2.0-2.5 0.11 -
1.4436 X3CrNiMo 17-13-3 0.05 16.5-18.5 10.5-13.0 2.5-3.0 0.11 -
316L S31603 0.03 16.0-18.0 10.0-14.0 2.0-3.0 0.1 -
1.4404 X2CrNiMo 17-12-2 0.03 16.5-18.5 10.0-13.0 2.0-2.5 0.11 -
1.4432 X2CrNiMo 17-12-3 0.03 16.5-18.5 10.5-13.0 2.5-3.0 0.11 -
1.4435 X2CrNiMo 18-14-3 0.03 17.0-19.0 12.5-15.0 2.5-3.0 0.11 -
316LN S31653 0.03 16.0-18.0 10.0-14.0 2.0-3.0 0.10-0.16 -
1.4406 X2CrNiMoN 17-11-2 0.03 16.5-18.5 10.0-12.0 2.0-2.5 0.12-0.22 -
1.4429 X2CrNiMoN 17-13-3 0.03 16.5-18.5 11.0-14.0 2.5-3.0 0.12-0.22 -
316Ti S31635 0.08 16.0-18.0 10.0-14.0 2.0-3.0 0.1 (5x[%C+%N])-0.7 Ti
1.4571 X6CrNiMoTi 17-12-2 0.08 16.5-18.5 10.5-13.5 2.0-2.5 - (5x%C)-0.7 Ti
316Cb S31640 0.08 16.0-18.0 10.0-14.0 2.0-3.0 - (10x%C)-1.1 Cb
1.458 X6CrNiMoNb 17-12-2 0.08 16.5-18.5 10.5-13.5 2.0-2.5 - (10x%C)-1.0 Nb
317L S31703 0.03 18.0-20.0 11.0-15.0 3.0-4.0 0.1 -
1.4438 X2CrNiMo 18-15-4 0.03 17.5-19.5 13.0-16.0 3.0-4.0 0.11 -
~ ~ ~ S31726 0.03 17.0-20.0 13.5-17.5 4.0-5.0 0.10-0.20 -
1.4439 X2CrNiMoN 17-13-5 0.03 16.5-18.5 12.5-14.5 4.0-5.0 0.12-0.22 -
317LN S31753 0.03 18.0-20.0 11.0-15.0 3.0-4.0 0.10-0.22 -
1.4434 X2CrNiMoN 18-12-4 0.03 16.5-19.5 10.5-14.0 3.0-4.0 0.10-0.20 -
321 S32100 0.08 17.0-19.0 9.0-12.0 - 0.1 (5x[%C+%N])-0.7 Ti
1.4541 X6CrNiTi 18-10 0.08 17.0-19.0 9.0-12.0 - - (5x%C)-0.7 Ti
347 S34700 0.08 17.0-19.0 9.0-13.0 - - (10x%C)-1.0 Cb
1.455 X6CrNiNb 18-10 0.08 17.0-19.0 9.0-12.0 - - (10x%C)-1.0 Nb
*254 SMo S31254 0.02 19.5 17.5 6 0.18 0.5 Cu
1.4547
~ ~ ~ SN08904 0.02 19.0-23.0 23.0-28.0 4.0-5.0 0.1 1.0-2.0 Cu
1.4539 X1NiCrMoCu 25-20-5 0.02 19.0-21.0 24.0-26.0 4.0-5.0 0.15 1.2-2.0 Cu
Typical similar proprietary grades:- 904L ~ Cronifer 1925LC ~ 2RK65 ~ Uranus B6
~ ~ ~ N08925/6 0.02 19.0-21.0 24.0-26.0 6.0-7.0 0.15-0.25 0.5-1.5 Cu
1.4529 X1NiCrMoCuN 25-20-7 0.02 19.0-21.0 24.0-26.0 6.0-7.0 0.15-0.25 0.5-1.5 Cu
Typical similar proprietary grades:- Cronifer 1925hMo ~ 25-6Mo ~ Uranus B26
~ ~ ~ N08028 0.03 26.0-28.0 29.5-32.5 3.0-4.0 - 0.6-1.4 Cu
1.4563 X1NiCrMoCu 31-27-4 0.02 26.0-28.0 30.0-32.0 3.0-4.0 0.11 0.7-1.5 Cu
Typical similar proprietary grades:- Nicrofer 3127LC ~ Sanicro 28
~ ~ ~ N08020 0.07 19.0-21.0 32.0-38.0 2.0-3.0 - (8x%C)-1.0 Cb & 3.0-4.0 Cu
2.466 NiCr 20 CuMo 0.05 19.0-21.0 36.0-39.0 2.0-3.0 - (8x%C)-1.0 Nb & 3.0-4.0 Cu
Typical similar proprietary grades:- Alloy 20Cb3 ~ Nicrofer 3620Nb ~ Inco alloy 20
~ ~ ~ N08825 0.05 19.5-23.5 38.0-46.0 2.5-3.5 - 0.6-1.2 Ti & 1.5-3.0 Cu & 0.20 Al
Typical similar proprietary grades:- Incoloy 825 ~ Nicrofer 4221
2.4858 NiCr 21 Mo 0.025 19.5-23.5 38.0-46.0 2.5-3.5 - 0.6-1.2 Ti & 1.5-3.0 Cu & 0.20 Al
~ ~ ~ N08330 & N08332 0.1 17.0-20.0 34.0-37.0 - - 0.75-1.50 Si & 1.0 Cu
1.4864 X12NiCrSi 35-16 0.15 15.0-17.0 33.0-37.0 - 0.11 1.0-2.0 Si
Typical similar proprietary grades:- Incoloy DS ~ Nicrofer 3718
~ ~ ~ N08800 & N08811 0.1 19.0-23.0 30.0-35.0 - - 39.5 Fe(min) & 0.15-0.60 Ti & 0.15-0.60 Al
1.4876 X10NiCrAITi 32-21 0.12 19.0-23.0 30.0-34.0 - - 0.15-0.60 Ti& 0.15-0.60 Al
Typical similar proprietary grades:- Incoloy 800 & 800HT ~ Nicrofer 3220& 3220H ~ Uranus 800 & 800H
* Chemical composition minimum values
Ferritic Stainless Steels
Grade Number UNS Number Grade Designation % C % Cr % Ni % Mo % N % Other
3CR12™ 0.03 11.0-12.0 1.5 - 0.03 0.6Ti
1.4003 X2CrNi 12 0.03 10.5-12.5 0.3-1.0 - 0.03 -
~ ~ ~ S40910 0.03 10.5-11.7 0.5 - 0.03 (6x[%C+%N]}-0.5 Ti & 0.17 Cb
1.4512 X2CrTi 12 0.03 10.5-12.5 - - - (6x[%C+%N])-0.65 Ti
430 S43000 0.12 16.0-18.0 0.75 - -
1.4016 X6Cr 17 0.08 16.0-18.0 - - -
1.4509 X2CrTiNb18 0.03 17.5-18.5 - - 0.045 0.10-0.60 Ti &(0.3+[3x%C])-1.0 Nb
439 S43035 0.07 17.0-19.0 0.5 - 0.04 (0.2+4x[%C+%N])-1.1 Ti & 0.15Al
1.451 X3CrTi 17 0.05 16.0-18.0 - - - (0.15+4x[%C+%N])-0.80 Ti
444 S44400 0.025 17.5-19.5 1 1.8-2.5 0.035 (0.20+4x[%C+%N])-0.80 Ti+Cb
1.4521 X2CrMoTi 18-2 0.025 17.0-20.0 - 1.8-2.5 0.03 (0.15+4x[%C+%N])-0.8 Ti
446 S44600 0.2 23.0-27.0 0.75 - 0.25
1.4762 X10CrAISi25 0.12 23.0-26.0 - - - 1.2-1.7 Al & 0.7-1.4 Si
Martensitic Stainless Steels
Grade Number UNS Number Grade Designation % C % Cr % Ni % Mo % N % Other
410 S41000 0.15 11.5-13.5 - - - -
1.4006 X12Cr 13 0.08-0.15 11.5-13.5 0.75 - - -
416 S41600 0.15 12.0-14.0 - - - >0.15 S (Free machining properties)
1.4005 X12CrS 13 0.08-0.15 12.0-14.0 - 0.6 - 0.15-0.35 S (Free machining properties)
420 S42000 >0.15 12.0-14.0 - - - -
1.4021 X20Cr 13 0.16-0.25 12.0-14.0 - - - -
431 S43100 0.2 15.0-17.0 1.25-2.50 - - -
1.4057 X17CrNi 16-2 0.12-0.22 15.0-17.0 1.5-2.5 - - -
440A S44002 0.60-0.75 16.0-18.0 - 0.75 - -
440B S44003 0.75-0.95 16.0-18.0 - 0.75 - -
1.4112 X90CrMoV 18 0.85-0.95 17.0-19.0 - 0.9-1.3 - 0.07-0.12 V
440C S44004 0.95-1.20 16.0-18.0 - 0.75 - -
1.4125 X105CrMo 17 0.95-1.20 16.0-18.0 - 0.4-0.8 - -
Duplex Stainless Steels
Grade Number UNS Number Grade Designation % C % Cr % Ni % Mo % N % Other
2304 S32304 0.03 21.5-24.5 3.0-5.5 0.1-0.6 0.05-0.20 0.05-0.6 Cu
1.4362 X12CrNiN 23-4 0.03 22.0-24.0 3.5-5.5 0.1-0.6 0.05-0.20 0.1-0.6 Cu
Typical similar proprietary grades: SAF2304 ~ 2304
~ ~ ~ S31803 0.03 21.0-23.0 4.5-6.5 2.5-3.5 0.08-0.20 -
2205 S32205 0.03 22.0-23.0 4.5-6.5 3.0-3.5 0.14-0.20 -
1.4462 X2CrNiMoN 22-5-3 0.03 21.0-23.0 4.5-6.5 2.5-3.5 0.10-0.22 -
Typical similar proprietary grades: SAF2205 ~ 2205 ~ Uranus 45N
2507 S32750 0.03 24.0-26.0 6.0-8.0 3.0-5.0 0.24-0.35 -
1.441 X2CrNiMoN 25-7-4 0.03 24.0-26.0 6.0-8.0 3.0-4.5 0.20-0.35 -
Typical similar proprietary grades: SAF2507 ~ 2507 ~ Uranus 47N
*LDX 2101 S32101 0.03 21.5 1.5 0.3 0.22 5.0 Mn
1.4162 -
*LDX 2404 S82441 0.02 24 3.6 1.6 0.27 3.0 Mn
1.4662 -
*DX 2202 S32202 0.025 23 2.5 <0.30 0.2 1.3 Mn
1.4062 X2CrNiN 22-2 -
255 S32550 0.04 24.0-27.0 4.5-6.5 2.9-3.9 0.10-0.25 1.5-2.5 Cu
1.4507 X2CrNiMoCuN 25-6-3 0.03 24.0-26.0 5.5-7.5 2.7-4.0 0.15-0.30 1.0-2.5 Cu
Typical similar proprietary grades: Ferralium 255-3SF ~ Uranus 52N
* Typical Composition %
Precipitation Hardenable (PH) Stainless Steels
Grade Number UNS Number Grade Designation % C % Cr % Ni % Mo % N % Other
630 S17400 0.07 15.0-17.5 3.0-5.0 - - 3.0-5.0 Cu & 0.1-0.5 Cb
1.4542 X5CrNiCuNb 16-4 0.07 15.0-17.0 3.0-5.0 0.6 - 3.0-5.0 Cu & (5x%C)-0.45 Nb
Typical similar proprietary grade: 17-4PH
631 S17700 0.09 16.0-18.0 6.5-7.75 - - 0.7-1.5 Al
1.4568 X7CrNiAl 17-7 0.09 16.0-18.0 6.5-7.8 - - 0.7-1.5 Al
Typical similar proprietary grade: 17-7PH
632 S15700 0.09 14.0-16.0 6.5-7.75 2.0-3.0 - 0.7-1.5 Al
1.4532 X8CrNiMoAl 15-7-2 0.1 14.0-16.0 6.5-7.8 2.0-3.0 - 0.7-1.5 Al
Typical similar proprietary grade: PH 15-7Mo