| Classification | Specification | Chemical composition | Other | Properties and applications | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JIS | AISI | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | N | |||
| Martensitic grades 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 | – | – | – | – | A good stainless steel/heat-resistant steel for turbine blades and components subject to high stress. |
| 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 | – | – | – | – | Good corrosion resistance and workability for machining. Appropriate for blades and general applications. | |
| 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 | – | – | – | A stronger specification with better corrosion resistance than 410 steel. Appropriate for turbine blades and components subject to high temperatures. | |
| 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 | Lead-containing free-cutting steel with 410-level corrosion resistance preserved. | |
| 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) | – | – | – | More conducive to cutting than any other stainless steel. Appropriate for screws, bolts, and automatic boards. | |
| 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 | – | – | – | – | Very hard with good corrosion resistance when quenched. Appropriate for turbine blades. | |
| 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 | – | – | – | – | Maintains hardness after quenching. Appropriate for blades, nozzles, valve seats, valves, and rulers. | |
| 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) | – | – | – | 420J2 steel modified to be more conducive to cutting. Appropriate for shafts. | |
| 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 | Lead-containing free-cutting steel with 420J1-level corrosion resistance preserved. | |
| 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 | – | – | – | – | Nickel-containing chrome steel, heat treatment confers advanced mechanical properties. Good corrosion resistance. | |
| 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) | – | – | – | Excellent hardness thanks to conduciveness to quenching and hardening, tougher than 440B and 440C steel. Appropriate for blades and gauges. | |
| 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) | – | – | – | Harder than 440A steel, tougher than 440C steel. Appropriate for blades and valves. | |
| 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) | – | – | – | Harder than any other stainless steel/heat-resistant steel. Appropriate for nozzles and bearings. | |
| 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) | – | – | – | A specification with better conduciveness to cutting than 440C steel. Appropriate for automatic boards. | |
| Ferritic grades 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 | No extreme hardening when cooled from high temperatures. Appropriate for turbine materials and quenching components. |
| 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 | – | – | – | – | Excellent bending of welded parts, workability, and resistance to oxidation at high temperatures. Appropriate for automobile exhaust gas treatment systems. | |
| 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 | – | – | – | – | A versatile specification with excellent corrosion resistance. Appropriate for interior finishing materials and components of oil burners and household electronics. | |
| 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) | – | – | – | A specification with better conduciveness to cutting than 430 steel. Appropriate for automatic boards, bolts, and nuts. | |
| 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 | – | – | – | More resistant to salinity than 430 steel. Appropriate for automobile exteriors. | |
| 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 | – | Appropriate for resistance to pitting in plants that handle organic acids or produce caustic soda. | |
| 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 | – | Similar properties to 447J1 steel. Appropriate for applications that require both corrosion resistance and soft magnetic properties. | |
| Austenitic ferritic grades 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 | – | – | – | Biphasic steel with excellent acid and pitting resistance and high strength. Appropriate for exhaust gas desulfurizers. |
| 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 | – | Exhibits resistance in environments that include hydrogen sulfide, carbon dioxide, chlorides, and the like. Appropriate for oil well pipes. | |
| 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 | – | Excellent resistance to pitting. Also resistant to SCC. Appropriate for seawater heat exchangers and salt manufacturing plants. | |
| Austenitic grades 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 | – | This nickel-saving specification is an alternative to 301 steel. Cold-worked to produce magnetic properties. Appropriate for railway rolling stock. |
| 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 | – | This nickel-saving specification is an alternative to 302 steel. Appropriate for cooking utensils. | |
| 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 | – | – | – | – | Appropriate for railway rolling stock, conveyor belts, bolts, nuts, and springs. | |
| 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 | – | – | – | – | Appropriate for exterior finishing materials. Appropriate for screws and bolts. | |
| 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) | – | – | – | Improved conduciveness to cutting and seizure resistance. Optimal for automatic boards. Appropriate for bolts and nuts. | |
| 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 | Improved conduciveness to cutting and seizure resistance. Optimal for automatic boards. Appropriate for rivets and screws. | |
| 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 | – | – | – | |
| 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 | – | – | – | – | Appropriate for food product and general chemical facilities, nuclear power, architecture, and household goods. | |
| 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 | – | – | – | – | Excellent resistance to intergranular corrosion, cannot be heat-treated after welding. | |
| 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 | – | Can be used to reduce material thickness. Appropriate for structural load-bearing members. | |
| 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 | 304 steel with nitrogen and niobium added to deliver the same properties. Appropriate for nonmagnetic springs. | |
| 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 | – | Same applications as 304N1 steel with excellent resistance to intergranular corrosion. | |
| 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 | – | – | An intermediate component of 304 and XM7 steel. Appropriate for bolts and nuts for cold working. | |
| 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 | – | – | – | – | Appropriate for spinning, special drawing, and 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 | – | – | – | – | A specification with better corrosion resistance than 304 steel. Used as heat-resistant steel. | |
| 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 | – | – | – | – | A specification with better oxidation resistance than 309S steel. Used as heat-resistant steel. Appropriate for gaskets. | |
| 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 | – | – | – | Better corrosion resistance than 304 steel in seawater and other media. Appropriate for pitting-resistant materials. | |
| 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 | – | – | – | An ultra-low carbon specification of 316 steel with additional resistance to intergranular corrosion. | |
| 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 | – | Can be used to reduce material thickness. Excellent corrosion resistance. Appropriate for load-bearing members. | |
| 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 | – | A specification with better resistance to intergranular corrosion than 316N steel. | |
| 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 | 316 steel with titanium added to improve resistance to intergranular corrosion. | |
| 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 | – | – | A specification with better corrosion and pitting resistance than 316 steel. Appropriate for sulfuric acid-resistant materials. | |
| 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 | – | – | A low carbon specification of 316J1 steel with additional resistance to intergranular corrosion. | |
| 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 | – | – | – | – | |
| 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 | – | – | – | A specification with better pitting resistance than 316 steel. Appropriate for dying facility materials. | |
| 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 | – | – | – | An ultra-low carbon specification of 317 steel with additional resistance to intergranular corrosion. | |
| 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 | – | 317L steel with nitrogen added for high strength and corrosion resistance. Appropriate for tanks and containers. | |
| 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 | – | – | – | Appropriate for heat exchangers compatible with liquids containing chloride ions as well as acetic acid and phosphoric acid plants. | |
| 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 | – | – | |
| 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 | – | – | – | |
| 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 | 304 steel with titanium added to enhance resistance to intergranular corrosion. Not appropriate for decorative components. | |
| 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 | 304 steel with niobium added to enhance resistance to intergranular corrosion. Appropriate for boilers and shells. | |
| 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 | – | – | 304 steel with copper added to improve conduciveness to cold working. Appropriate for cold heading. | |
| 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 | – | – | – | – | 304 steel with extra nickel and silicon added to improve resistance to stress, corrosion, and cracking. Appropriate for environments containing chloride ions. | |
| Precipitation hardening grades 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 | A specification with copper added for conduciveness to precipitation hardening. Appropriate for shafts and turbine components. |
| 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 | A specification with aluminium added for conduciveness to precipitation hardening. Appropriate for springs and washers. | |
* SUS329J1 stainless steel is listed under austenitic ferritic grades.
Notes:
- (1) Nickel content may be 0.6% or lower.
- (2) Molybdenum can be added such that the content is 0.6% or lower.
- (3) Molybdenum can be added such that the content is 0.75% or lower.
Remarks:
- (1) SUS447J1 and SUSXM27 steel under the ferritic grades may have nickel content of 0.60% or lower.
SUS447J1 and SUSXM27 steel may have nickel content of 0.50% or lower, copper content of 0.20% or lower, and nickel + copper content of 0.50% or lower, and alloy elements other than those listed may be added as necessary. - (2) Alloy elements other than those listed may be added to SUSXM15J1 steel as necessary.
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