--- title: "JIS steel grades — 2322 designations — Page 28" 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/28 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/jis/page/28.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:fe750d1293b85978f6e866fa3b4d379d62dadb39e0ca5dde1ef6ffb161c8832d generated: 2026-09-26 --- > **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/28 > Canonical URL: https://steelequivalents.com/materials/jis/page/28 > 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 28 Every grade designated under JIS, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. 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. 17 of 50 rows differ and carry an “Indicative” mark. ## Also known as 2322 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [STAM440H](/materials/jis/stam440h "STAM440H") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STAM470G](/materials/jis/stam470g "STAM470G") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STAM470H](/materials/jis/stam470h "STAM470H") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STAM500G](/materials/jis/stam500g "STAM500G") | — | Unalloyed structural steels | ≤ 0.3 | — | | [STAM500H](/materials/jis/stam500h "STAM500H") | — | Unalloyed structural steels | ≤ 0.3 | — | | [STAM540H](/materials/jis/stam540h "STAM540H") | — | Unalloyed structural steels | ≤ 0.3 | — | | [STB340](/materials/jis/stb340 "STB340") | — | — | ≤ 0.18 | — | | [STB340](/materials/jis/stb340 "STB340") Indicative | [1.0301](/materials/material-no/1.0301 "1.0301") | Case hardening steels | 0.07–0.13 | 20 | | [STB410](/materials/jis/stb410 "STB410") | — | — | ≤ 0.32 | — | | [STB410](/materials/jis/stb410 "STB410") Indicative | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | | [STB410](/materials/jis/stb410 "STB410") Indicative | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [STB410](/materials/jis/stb410 "STB410") Indicative | [1.1155](/materials/material-no/1.1155 "1.1155") | Others | 0.2–0.28 | 6 | | [STB510](/materials/jis/stb510 "STB510") | — | — | ≤ 0.25 | — | | [STB510](/materials/jis/stb510 "STB510") Indicative | [1.1133](/materials/material-no/1.1133 "1.1133") | Quenched and tempered steels | 0.17–0.23 | 20 | | [STBA12](/materials/jis/stba12 "STBA12") | — | — | 0.1–0.2 | — | | [STBA12](/materials/jis/stba12 "STBA12") Indicative | [1.5415](/materials/material-no/1.5415 "1.5415") | Heat-resistant structural steels | 0.12–0.2 | 15 | | [STBA13](/materials/jis/stba13 "STBA13") | — | — | 0.15–0.25 | — | | [STBA20](/materials/jis/stba20 "STBA20") | — | — | 0.1–0.2 | — | | [STBA20](/materials/jis/stba20 "STBA20") Indicative | [1.7262](/materials/material-no/1.7262 "1.7262") | Case hardening steels | 0.13–0.17 | 18 | | [STBA20](/materials/jis/stba20 "STBA20") Indicative | [1.7335](/materials/material-no/1.7335 "1.7335") | Heat-resistant structural steels | 0.08–0.18 | 22 | | [STBA22](/materials/jis/stba22 "STBA22") | — | — | ≤ 0.15 | — | | [STBA22](/materials/jis/stba22 "STBA22") Indicative | [1.7262](/materials/material-no/1.7262 "1.7262") | Case hardening steels | 0.13–0.17 | 18 | | [STBA22](/materials/jis/stba22 "STBA22") Indicative | [1.7335](/materials/material-no/1.7335 "1.7335") | Heat-resistant structural steels | 0.08–0.18 | 22 | | [STBA23](/materials/jis/stba23 "STBA23") | — | — | ≤ 0.15 | — | | [STBA24](/materials/jis/stba24 "STBA24") | — | — | ≤ 0.15 | — | | [STBA25](/materials/jis/stba25 "STBA25") | — | — | ≤ 0.15 | — | | [STBA25](/materials/jis/stba25 "STBA25") Indicative | [1.7362](/materials/material-no/1.7362 "1.7362") | Hydrogen resistant steels | 0.1–0.15 | 13 | | [STBA26](/materials/jis/stba26 "STBA26") | — | — | ≤ 0.15 | — | | [STBA26](/materials/jis/stba26 "STBA26") Indicative | [1.7386](/materials/material-no/1.7386 "1.7386") | Hydrogen resistant steels | 0.08–0.15 | 6 | | [STBL380](/materials/jis/stbl380 "STBL380") | — | Low-temperature structural steels | ≤ 0.25 | — | | [STBL450](/materials/jis/stbl450 "STBL450") | — | Low-temperature structural steels | ≤ 0.18 | — | | [STBL690](/materials/jis/stbl690 "STBL690") | — | Low-temperature structural steels | ≤ 0.13 | — | | [STC370](/materials/jis/stc370 "STC370") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STC42](/materials/jis/stc42 "STC42") Indicative | [1.7337](/materials/material-no/1.7337 "1.7337") | Heat-resistant structural steels | 0.13–0.2 | 9 | | [STC440](/materials/jis/stc440 "STC440") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STC48](/materials/jis/stc48 "STC48") Indicative | [1.7362](/materials/material-no/1.7362 "1.7362") | Hydrogen resistant steels | 0.1–0.15 | 13 | | [STC510A](/materials/jis/stc510a "STC510A") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STC510B](/materials/jis/stc510b "STC510B") | — | Unalloyed structural steels | ≤ 0.18 | — | | [STC52C](/materials/jis/stc52c "STC52C") Indicative | [1.4300](/materials/material-no/1.4300 "1.4300") | Stainless steels | ≤ 0.12 | 15 | | [STC540](/materials/jis/stc540 "STC540") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STC590A](/materials/jis/stc590a "STC590A") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STC590B](/materials/jis/stc590b "STC590B") | — | Unalloyed structural steels | ≤ 0.25 | — | | [STF410](/materials/jis/stf410 "STF410") | — | — | ≤ 0.3 | — | | [STFA12](/materials/jis/stfa12 "STFA12") | — | — | 0.1–0.2 | — | | [STFA22](/materials/jis/stfa22 "STFA22") | — | — | ≤ 0.15 | — | | [STFA22](/materials/jis/stfa22 "STFA22") Indicative | [1.7262](/materials/material-no/1.7262 "1.7262") | Case hardening steels | 0.13–0.17 | 18 | | [STFA22](/materials/jis/stfa22 "STFA22") Indicative | [1.7335](/materials/material-no/1.7335 "1.7335") | Heat-resistant structural steels | 0.08–0.18 | 22 | | [STFA23](/materials/jis/stfa23 "STFA23") | — | — | ≤ 0.15 | — | | [STFA24](/materials/jis/stfa24 "STFA24") | — | — | ≤ 0.15 | — | | [STFA25](/materials/jis/stfa25 "STFA25") | — | — | ≤ 0.15 | — | **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/27 "Previous") Page 28 of 47[Next](/materials/jis/page/29 "Next")