--- title: "JIS steel grades — 2322 designations — Page 3" description: "Steel grades designated under JIS, with chemical composition, mechanical properties and equivalents in other standards. 2322 designations across…" canonical: https://steelequivalents.com/materials/jis/page/3 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/jis/page/3.md cs: https://steelequivalents.com/cs/materiály/jis.md de: https://steelequivalents.com/de/werkstoffe/jis.md es: https://steelequivalents.com/es/materiales/jis.md fr: https://steelequivalents.com/fr/matériaux/jis.md hu: https://steelequivalents.com/hu/anyagok/jis.md it: https://steelequivalents.com/it/materiali/jis.md nl: https://steelequivalents.com/nl/materialen/jis.md pl: https://steelequivalents.com/pl/materiały/jis.md pt: https://steelequivalents.com/pt/materiais/jis.md ru: https://steelequivalents.com/ru/материалы/jis.md tr: https://steelequivalents.com/tr/malzemeler/jis.md zh: https://steelequivalents.com/zh/材料/jis.md ja: https://steelequivalents.com/ja/材料/jis.md ar: https://steelequivalents.com/ar/المواد/jis.md ko: https://steelequivalents.com/ko/재료/jis.md pt-br: https://steelequivalents.com/pt-br/materiais/jis.md hi: https://steelequivalents.com/hi/सामग्री/jis.md content_hash: sha256:1151a0f9ee812d483307e7a0f7f62335ff9ba9f457e86e67feaa10c584f5bbbe generated: 2026-09-22 --- > **Machine-readable Markdown rendering.** This is a Markdown representation of a web page, > served for AI agents and crawlers as a token-efficient alternative to the full HTML. > Full interactive HTML version: https://steelequivalents.com/materials/jis/page/3 > Canonical URL: https://steelequivalents.com/materials/jis/page/3 > Available languages: en, cs, de, es, fr, hu, it, nl, pl, pt, ru, tr, zh, ja, ar, ko, pt-br, hi > Change detection: `content_hash` is the SHA-256 of this document's Markdown body — everything > below this block, whitespace-trimmed, excluding the front-matter. Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. JIS · 2,322 grades # JIS steel grades — 2322 designations — Page 3 Every grade designated under JIS, with the identifying and comparative data we hold for each. Open a grade for its full composition, properties and its designations in other standards. Unless marked, every name here is an asserted identity — the same grade under this standard’s own designation. 16 of 50 rows differ and carry an “Indicative” mark. ## Also known as 2322 designations | Grade | Category | C% by weight | Also in other standards | |---|---|---|---| | [FCMB300-6](/materials/jis/fcmb300-6 "FCMB300-6") | Cast iron | — | — | | [FCMB310-8](/materials/jis/fcmb310-8 "FCMB310-8") | Cast iron | — | — | | [FCMB340-10](/materials/jis/fcmb340-10 "FCMB340-10") | Cast iron | — | — | | [FCMB35](/materials/jis/fcmb35 "FCMB35") Indicative | Others | — | 10 | | [FCMB350-10](/materials/jis/fcmb350-10 "FCMB350-10") | Cast iron | — | — | | [FCMB350-10S](/materials/jis/fcmb350-10s "FCMB350-10S") | Cast iron | — | — | | [FCMP440](/materials/jis/fcmp440 "FCMP440") Indicative | Others | — | 10 | | [FCMP450-6](/materials/jis/fcmp450-6 "FCMP450-6") | Cast iron | — | — | | [FCMP490-4](/materials/jis/fcmp490-4 "FCMP490-4") | Cast iron | — | — | | [FCMP500-5](/materials/jis/fcmp500-5 "FCMP500-5") | Cast iron | — | — | | [FCMP540](/materials/jis/fcmp540 "FCMP540") Indicative | Others | — | 8 | | [FCMP540-3](/materials/jis/fcmp540-3 "FCMP540-3") | Cast iron | — | — | | [FCMP550-4](/materials/jis/fcmp550-4 "FCMP550-4") | Cast iron | — | — | | [FCMP590-3](/materials/jis/fcmp590-3 "FCMP590-3") | Cast iron | — | — | | [FCMP600-3](/materials/jis/fcmp600-3 "FCMP600-3") | Cast iron | — | — | | [FCMP650-2](/materials/jis/fcmp650-2 "FCMP650-2") | Cast iron | — | — | | [FCMP700-2](/materials/jis/fcmp700-2 "FCMP700-2") | Cast iron | — | — | | [FCMP800-1](/materials/jis/fcmp800-1 "FCMP800-1") | Cast iron | — | — | | [FCMW350-4](/materials/jis/fcmw350-4 "FCMW350-4") | Cast iron | — | — | | [FCMW360-12](/materials/jis/fcmw360-12 "FCMW360-12") | Cast iron | — | — | | [FCMW380-12](/materials/jis/fcmw380-12 "FCMW380-12") | Cast iron | — | — | | [FCMW380-7](/materials/jis/fcmw380-7 "FCMW380-7") | Cast iron | — | — | | [FCMW400-5](/materials/jis/fcmw400-5 "FCMW400-5") | Cast iron | — | — | | [FCMW450-7](/materials/jis/fcmw450-7 "FCMW450-7") | Cast iron | — | — | | [FCMW550-4](/materials/jis/fcmw550-4 "FCMW550-4") | Cast iron | — | — | | [FCV300](/materials/jis/fcv300 "FCV300") | Cast iron | — | — | | [FCV350](/materials/jis/fcv350 "FCV350") | Cast iron | — | — | | [FCV400](/materials/jis/fcv400 "FCV400") | Cast iron | — | — | | [FCV450](/materials/jis/fcv450 "FCV450") | Cast iron | — | — | | [FCV500](/materials/jis/fcv500 "FCV500") | Cast iron | — | — | | [G3127 gr. SL3N255](/materials/jis/g3127-gr-sl3n255 "G3127 gr. SL3N255") Indicative | Low-temperature structural steels | ≤ 0.15 | 11 | | [G3127 gr. SL3N255](/materials/jis/g3127-gr-sl3n255 "G3127 gr. SL3N255") Indicative | Low-temperature structural steels | 0.12–0.19 | 9 | | [G3127 gr. SL3N440](/materials/jis/g3127-gr-sl3n440 "G3127 gr. SL3N440") Indicative | Low-temperature structural steels | ≤ 0.15 | 11 | | [G3127 gr. SL3N440](/materials/jis/g3127-gr-sl3n440 "G3127 gr. SL3N440") Indicative | Low-temperature structural steels | 0.12–0.19 | 9 | | [G3127 gr. SL5N590](/materials/jis/g3127-gr-sl5n590 "G3127 gr. SL5N590") Indicative | Low-temperature structural steels | ≤ 0.15 | 11 | | [G3127 gr. SL5N590](/materials/jis/g3127-gr-sl5n590 "G3127 gr. SL5N590") Indicative | Low-temperature structural steels | 0.12–0.19 | 9 | | [G3464 gr. STBL450](/materials/jis/g3464-gr-stbl450 "G3464 gr. STBL450") Indicative | Low-temperature structural steels | ≤ 0.15 | 11 | | [G3464 gr. STBL450](/materials/jis/g3464-gr-stbl450 "G3464 gr. STBL450") Indicative | Low-temperature structural steels | 0.12–0.19 | 9 | | [G4303](/materials/jis/g4303 "G4303") Indicative | Stainless steels | ≤ 0.03 | 6 | | [NCF 800](/materials/jis/ncf800 "NCF 800") Indicative | Heat resistant steels | ≤ 0.12 | 12 | | [NCF 800 TB](/materials/jis/ncf800tb "NCF 800 TB") Indicative | Heat resistant steels | ≤ 0.12 | 12 | | [NCF 800 TP](/materials/jis/ncf800tp "NCF 800 TP") Indicative | Heat resistant steels | ≤ 0.12 | 12 | | [NCF600](/materials/jis/ncf600 "NCF600") | Nickel and cobalt alloys | ≤ 0.15 | 1 | | [NCF600TB](/materials/jis/ncf600tb "NCF600TB") | Nickel and cobalt alloys | ≤ 0.15 | 1 | | [NCF600TP](/materials/jis/ncf600tp "NCF600TP") | Nickel and cobalt alloys | ≤ 0.15 | 1 | | [NCF601](/materials/jis/ncf601 "NCF601") | Nickel and cobalt alloys | ≤ 0.1 | 1 | | [NCF601](/materials/jis/ncf601 "NCF601") Indicative | Heat resistant steels | 0.03–0.1 | 7 | | [NCF625](/materials/jis/ncf625 "NCF625") | Nickel and cobalt alloys | ≤ 0.1 | 1 | | [NCF625TB](/materials/jis/ncf625tb "NCF625TB") | Nickel and cobalt alloys | ≤ 0.1 | 1 | | [NCF625TP](/materials/jis/ncf625tp "NCF625TP") | Nickel and cobalt alloys | ≤ 0.1 | 1 | **This grade’s own name** — recorded in our sources as this grade’s own designation under that standard. **Indicative** — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. **Withdrawn** — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. [Previous](/materials/jis/page/2 "Previous") Page 3 of 47[Next](/materials/jis/page/4 "Next")