Chemical Composition and Applications of Stainless Steel

Classification Specification Chemical composition Other Properties and applications
JIS AISI C Si Mn P S Ni Cr Mo Cu N
Martensitic grades SUS403 403 0.15 or lower 0.50 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 11.50–13.00 – – – – Turbine blade, compressor, valve parts
SUS410 410 0.15 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 11.50–13.50 – – – – Machinery parts, pump shaft
SUS410J1 – 0.08–0.18 0.60 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 11.50–14.00 0.30–0.60 – – – Turbine blade, machinery parts for high temperature
SUS410F2 – 0.15 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 11.50–13.50 – – – Pb 0.05–0.30 –
SUS416 416 0.15 or lower 1.00 or lower 1.25 or lower 0.060 or lower 0.15 or higher (1) 12.00–14.00 (2) – – – Screw, bolt, nut
SUS420J1 420 0.16–0.25 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 12.00–14.00 – – – – Motor shaft, machinery parts
SUS420J2 420 0.26–0.40 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 12.00–14.00 – – – – Valve parts, knives, shaft, machining tool parts
SUS420F 420 F 0.26–0.40 1.00 or lower 1.25 or lower 0.060 or lower 0.15 or higher (1) 12.00–14.00 (2) – – – –
SUS420F2 – 0.26–0.40 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 12.00–14.00 – – – Pb 0.05–0.30 High strength machinery parts
SUS431 431 0.20 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower 1.25–2.50 15.00–17.00 – – – – Nozzle, bearing
SUS440A 440A 0.60–0.75 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 16.00–18.00 (3) – – – Knives, valve
SUS440B 440B 0.75–0.95 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 16.00–18.00 (3) – – – Corrosion and heat resistant bearing knives
SUS440C 440C 0.95–1.20 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower (1) 16.00–18.00 (3) – – – Bearing
SUS440F S44020 0.95–1.20 1.00 or lower 1.25 or lower 0.060 or lower 0.15 or higher (1) 16.00–18.00 (3) – – – –
Ferritic grades SUS405 405 0.08 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower – 11.50–14.50 – – – Al 0.10–0.30 Turbine nozzle, welding parts, cast parts
SUS410L – 0.03 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower – 11.00–13.50 – – – – Burner parts
SUS430 430 0.12 or lower 0.75 or lower 1.00 or lower 0.040 or lower 0.030 or lower – 16.00–18.00 – – – – Kitchen, commodity, oxidation resistant parts below 900℃
SUS430F 430 F 0.12 or lower 1.00 or lower 1.25 or lower 0.060 or lower 0.15 or higher – 16.00–18.00 (2) – – – Bolt, nut
SUS434 434 0.12 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower – 16.00–18.00 0.75–1.25 – – – Automobile exterior equipment
SUS447J1 – 0.01 or lower 0.40 or lower 0.40 or lower 0.030 or lower 0.020 or lower – 28.50–32.00 1.50–2.50 – 0.015 or lower – Pollution protection equipment
SUSXM27 – 0.01 or lower 0.40 or lower 0.40 or lower 0.030 or lower 0.020 or lower – 25.00–27.50 0.75–1.50 – 0.015 or lower – Pollution protection equipment
Austenitic ferritic grades SUS329J1 329 0.08 or lower 1.00 or lower 1.50 or lower 0.040 or lower 0.030 or lower 3.00–6.00 23.00–28.00 1.00–3.00 – – – Seawater pump
SUS329J3L S31803 0.03 or lower 1.00 or lower 2.00 or lower 0.040 or lower 0.030 or lower 4.50–6.50 21.00–24.00 2.50–3.50 – 0.08–0.20 – Stirring shaft
SUS329J4L S31260 0.03 or lower 1.00 or lower 1.50 or lower 0.040 or lower 0.030 or lower 5.50–7.50 24.00–26.00 2.50–3.50 – 0.08–0.30 – Stirring shaft
Austenitic grades SUS201 201 0.15 or lower 1.00 or lower 5.50–7.50 0.060 or lower 0.030 or lower 3.50–5.50 16.00–18.00 – – 0.25 or lower – Alternative grade of SUS301
SUS202 202 0.15 or lower 1.00 or lower 7.50–10.00 0.060 or lower 0.030 or lower 4.00–6.00 17.00–19.00 – – 0.25 or lower – Alternative grade of SUS302
SUS301 301 0.15 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 6.00–8.00 16.00–18.00 – – – – Spring, shaft
SUS302 302 0.15 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 8.00–10.00 17.00–19.00 – – – – General corrosion resistance construction material, equipment parts
SUS303 303 0.15 or lower 1.00 or lower 2.00 or lower 0.200 or lower 0.15 or higher 8.00–10.00 17.00–19.00 (2) – – – Automatic machined parts such as screw, bolt
SUS303Se 303Se 0.15 or lower 1.00 or lower 2.00 or lower 0.200 or lower 0.060 or lower 8.00–10.00 17.00–19.00 – – – Se 0.15 or higher Screw
SUS303Cu – 0.15 or lower 1.00 or lower 3.00 or lower 0.200 or lower 0.15 or higher 8.00–10.00 17.00–19.00 (2) 1.50–3.50 – – Shaft
SUS304 304 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 8.00–10.50 18.00–20.00 – – – – General corrosion resistance, food processing, equipment parts
SUS304L 304L 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 9.00–13.00 18.00–20.00 – – – – To avoid intergranular corrosion (e.g. welding by SUS304)
SUS304N1 304N 0.08 or lower 1.00 or lower 2.50 or lower 0.045 or lower 0.030 or lower 7.00–10.50 18.00–20.00 – – 0.10–0.25 – Structural parts for higher strength
SUS304N2 – 0.08 or lower 1.00 or lower 2.50 or lower 0.045 or lower 0.030 or lower 7.50–10.50 18.00–20.00 – – 0.15–0.30 Nb 0.15 or lower Valve, pump
SUS304LN 304LN 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 8.50–11.50 17.00–19.00 – – 0.12–0.22 – SUS304 with higher strength
SUS304J3 – 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 8.00–10.50 17.00–19.00 – 1.00–3.00 – – Cold heading
SUS305 305 0.12 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 10.50–13.00 17.00–19.00 – – – – Cold heading
SUS309S 309S 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 12.00–15.00 22.00–24.00 – – – – Superior corrosion and oxidation resistance to 304. Parts for chemical plant, heat treatment, furnace
SUS310S 310S 0.08 or lower 1.50 or lower 2.00 or lower 0.045 or lower 0.030 or lower 19.00–22.00 24.00–26.00 – – – – Superior corrosion and heat resistance to SUS309S. Parts for thermal exchanger and furnace
SUS316 316 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 10.00–14.00 16.00–18.00 2.00–3.00 – – – Chemical plant equipment (paper, soap, chemical textile, fertilizer)
SUS316L 316L 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 12.00–15.00 16.00–18.00 2.00–3.00 – – – To avoid intergranular corrosion of SUS316
SUS316N 316N 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 10.00–14.00 16.00–18.00 2.00–3.00 – 0.10–0.22 – SUS316 with higher strength
SUS316LN 316LN 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 10.50–14.50 16.50–18.50 2.00–3.00 – 0.12–0.22 – SUS316 with higher strength
SUS316Ti – 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 10.00–14.00 16.00–18.00 2.00–3.00 – – Ti 5 × C% or higher SUS316 with higher intergranular corrosion resistance
SUS316J1 – 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 10.00–14.00 17.00–19.00 1.20–2.75 1.00–2.50 – – Chemical plant equipment (corrosion resistance plate or tube)
SUS316J1L – 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 12.00–16.00 17.00–19.00 1.20–2.75 1.00–2.50 – – To avoid intergranular corrosion of SUS316J1
SUS316F – 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.10 or higher 10.00–14.00 16.00–18.00 2.00–3.00 – – – Watchband
SUS317 317 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 11.00–15.00 18.00–20.00 3.00–4.00 – – – Environment which requires corrosion resistance (e.g. dyeing machine)
SUS317L 317L 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 11.00–15.00 18.00–20.00 3.00–4.00 – – – Improved intergranular corrosion resistance of SUS317
SUS317LN – 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 11.00–15.00 18.00–20.00 3.00–4.00 – 0.10–0.22 – SUS317L with higher strength
SUS317J1 – 0.04 or lower 1.00 or lower 2.50 or lower 0.045 or lower 0.030 or lower 15.00–17.00 16.00–19.00 4.00–6.00 – – – Thermal exchanger including chlorine ion
SUS836L – 0.03 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 24.00–26.00 19.00–24.00 5.00–7.00 – 0.25 or lower – Seawater resistance stainless steel
SUS890L – 0.02 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 23.00–28.00 19.00–23.00 4.00–5.00 1.00–2.00 – – Seawater resistance stainless steel
SUS321 321 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 9.00–13.00 17.00–19.00 – – – Ti 5 × C% or higher Parts which are unable to be heat treated after welding. Equipment parts used between 730～900℃ thermal condition
SUS347 347 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 9.00–13.00 17.00–19.00 – – – Nb 10 × C% or higher Superior intergranular corrosion resistance
SUSXM7 304Cu 0.08 or lower 1.00 or lower 2.00 or lower 0.045 or lower 0.030 or lower 8.50–10.50 17.00–19.00 – 3.00–4.00 – – Screw, bolt, nut
SUSXM15J1 – 0.08 or lower 3.00–5.00 2.00 or lower 0.045 or lower 0.030 or lower 11.50–15.00 15.00–20.00 – – – – Environment which includes chlorine ion
Precipitation hardening grades SUS630 S17400 0.07 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower 3.00–5.00 15.00–17.50 – 3.00–5.00 – Nb 0.15–0.45 Shaft, turbine parts
SUS631 S17700 0.09 or lower 1.00 or lower 1.00 or lower 0.040 or lower 0.030 or lower 6.50–7.75 16.00–18.00 – – – Al 0.75–1.50 Springs, washers

* SUS329J1 stainless steel is listed under austenitic ferritic.

Notes:

  1. (1) Ni may be contained 0.6% or less.
  2. (2) Mo can be added up to 0.6%.
  3. (3) Mo can be added up to 0.75%.

Remarks:

  1. (1) Ferrite SUS447J1 and SUSXM27 may contain Ni 0.60% or less.
    SUS447J1 and SUSXM27 may contain Ni 0.50% or less, Cu 0.20% or less, and Ni+Cu 0.50% or less. And alloy elements other than those listed may be added as necessary.
  2. (2) Alloy elements other than those listed may be added to SUSXM15J1 steel as necessary.

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