--- title: "JIS steel grades — 2322 designations — Page 31" 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/31 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/jis/page/31.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: sha256:93a205492e5378c2efac132af3217857b76bcdebdd818e706e4dd2d39aea757c 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/31 > Canonical URL: https://steelequivalents.com/materials/jis/page/31 > 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 31 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 indicative cross-reference, not an asserted identity — the grades are close, not interchangeable. 18 of 50 rows differ and carry a “This grade’s own name” mark. ## Also known as 2322 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [STW400](/materials/jis/stw400 "STW400") This grade’s own name | — | Unalloyed structural steels | ≤ 0.25 | — | | [SUH 309](/materials/jis/suh-309 "SUH 309") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant steels | ≤ 0.2 | 20 | | [SUH 309](/materials/jis/suh-309 "SUH 309") | [1.4833](/materials/material-no/1.4833 "1.4833") | Heat resistant steels | ≤ 0.15 | 15 | | [SUH 309TB](/materials/jis/suh-309tb "SUH 309TB") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant steels | ≤ 0.2 | 20 | | [SUH 309TP](/materials/jis/suh-309tp "SUH 309TP") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant steels | ≤ 0.2 | 20 | | [SUH 31](/materials/jis/suh31 "SUH 31") | [1.4873](/materials/material-no/1.4873 "1.4873") | Valve steels | 0.4–0.5 | 11 | | [SUH 31 TK](/materials/jis/suh-31-tk "SUH 31 TK") | [1.4873](/materials/material-no/1.4873 "1.4873") | Valve steels | 0.4–0.5 | 11 | | [SUH 31 TP](/materials/jis/suh-31-tp "SUH 31 TP") | [1.4873](/materials/material-no/1.4873 "1.4873") | Valve steels | 0.4–0.5 | 11 | | [SUH 310](/materials/jis/suh310 "SUH 310") | [1.4843](/materials/material-no/1.4843 "1.4843") | Resistance heating alloys | ≤ 0.2 | 9 | | [SUH 409](/materials/jis/suh-409 "SUH 409") | [1.4512](/materials/material-no/1.4512 "1.4512") | Stainless steels | ≤ 0.03 | 10 | | [SUH 409](/materials/jis/suh-409 "SUH 409") | [1.4720](/materials/material-no/1.4720 "1.4720") | Heat resistant steels | ≤ 0.08 | 5 | | [SUH 409L](/materials/jis/suh409l "SUH 409L") | [1.4512](/materials/material-no/1.4512 "1.4512") | Stainless steels | ≤ 0.03 | 10 | | [SUH 446](/materials/jis/suh446 "SUH 446") | [1.4749](/materials/material-no/1.4749 "1.4749") | Heat resistant steels | 0.15–0.2 | 10 | | [SUH1](/materials/jis/suh1 "SUH1") | [1.4718](/materials/material-no/1.4718 "1.4718") | Valve steels | 0.4–0.5 | 16 | | [SUH1](/materials/jis/suh1 "SUH1") | [1.4718](/materials/material-no/1.4718 "1.4718") | Others | 0.4–0.5 | 16 | | [SUH11](/materials/jis/suh11 "SUH11") This grade’s own name | — | Heat resistant steels | 0.45–0.55 | — | | [SUH2](/materials/jis/suh2 "SUH2") | [1.4718](/materials/material-no/1.4718 "1.4718") | Valve steels | 0.4–0.5 | 16 | | [SUH2](/materials/jis/suh2 "SUH2") | [1.4718](/materials/material-no/1.4718 "1.4718") | Others | 0.4–0.5 | 16 | | [SUH21](/materials/jis/suh21 "SUH21") This grade’s own name | [1.4742](/materials/material-no/1.4742 "1.4742") | Heat resistant steels | ≤ 0.12 | 17 | | [SUH21](/materials/jis/suh21 "SUH21") This grade’s own name | — | Heat resistant steels | ≤ 0.1 | — | | [SUH3](/materials/jis/suh3 "SUH3") This grade’s own name | [1.4731](/materials/material-no/1.4731 "1.4731") | Valve steels | 0.35–0.45 | 12 | | [SUH3](/materials/jis/suh3 "SUH3") | [1.3343](/materials/material-no/1.3343 "1.3343") | High-speed steels | 0.86–0.94 | 19 | | [SUH31](/materials/jis/suh31 "SUH31") This grade’s own name | — | Heat resistant steels | 0.35–0.45 | — | | [SUH310](/materials/jis/suh310 "SUH310") | [1.4845](/materials/material-no/1.4845 "1.4845") | Heat resistant steels | ≤ 0.1 | 21 | | [SUH310](/materials/jis/suh310 "SUH310") | [1.4842](/materials/material-no/1.4842 "1.4842") | Others | ≤ 0.14 | 14 | | [SUH310](/materials/jis/suh310 "SUH310") | [1.4841](/materials/material-no/1.4841 "1.4841") | Heat resistant steels | ≤ 0.2 | 17 | | [SUH330](/materials/jis/suh330 "SUH330") This grade’s own name | — | Stainless steels | ≤ 0.15 | — | | [SUH330](/materials/jis/suh330 "SUH330") | [1.4864](/materials/material-no/1.4864 "1.4864") | Heat resistant steels | ≤ 0.15 | 14 | | [SUH35](/materials/jis/suh35 "SUH35") | [1.4871](/materials/material-no/1.4871 "1.4871") | Valve steels | 0.48–0.58 | 17 | | [SUH36](/materials/jis/suh36 "SUH36") This grade’s own name | — | Heat resistant steels | 0.48–0.58 | — | | [SUH36](/materials/jis/suh36 "SUH36") | [1.4871](/materials/material-no/1.4871 "1.4871") | Valve steels | 0.48–0.58 | 17 | | [SUH37](/materials/jis/suh37 "SUH37") This grade’s own name | — | Heat resistant steels | 0.15–0.25 | — | | [SUH38](/materials/jis/suh38 "SUH38") This grade’s own name | — | Heat resistant steels | 0.25–0.35 | — | | [SUH4](/materials/jis/suh4 "SUH4") | [1.4747](/materials/material-no/1.4747 "1.4747") | Others | 0.75–0.85 | 7 | | [SUH409L](/materials/jis/suh409l "SUH409L") This grade’s own name | — | Heat resistant steels | ≤ 0.03 | — | | [SUH446](/materials/jis/suh446 "SUH446") | [1.4762](/materials/material-no/1.4762 "1.4762") | Heat resistant steels | ≤ 0.12 | 12 | | [SUH600](/materials/jis/suh600 "SUH600") This grade’s own name | — | Heat resistant steels | 0.15–0.2 | — | | [SUH616](/materials/jis/suh616 "SUH616") This grade’s own name | — | Heat resistant steels | 0.2–0.25 | — | | [SUH616](/materials/jis/suh616 "SUH616") | [1.4929](/materials/material-no/1.4929 "1.4929") | High-temperature steels | 0.2–0.25 | 5 | | [SUH616](/materials/jis/suh616 "SUH616") | [1.4935](/materials/material-no/1.4935 "1.4935") | High-temperature steels | 0.17–0.24 | 5 | | [SUH660](/materials/jis/suh660 "SUH660") This grade’s own name | — | Stainless steels | ≤ 0.08 | — | | [SUH661](/materials/jis/suh661 "SUH661") This grade’s own name | — | Heat resistant steels | 0.08–0.16 | — | | [SUH661](/materials/jis/suh661 "SUH661") | [1.4871](/materials/material-no/1.4871 "1.4871") | Valve steels | 0.48–0.58 | 17 | | [SUJ2](/materials/jis/suj2 "SUJ2") | [1.2067](/materials/material-no/1.2067 "1.2067") | Tool steels for cold work | 0.95–1.1 | 21 | | [SUJ2](/materials/jis/suj2 "SUJ2") | [1.3505](/materials/material-no/1.3505 "1.3505") | Bearing steels | 0.93–1.05 | 22 | | [SUJ3](/materials/jis/suj3 "SUJ3") This grade’s own name | — | Bearing steels | 0.95–1.1 | — | | [SUJ3](/materials/jis/suj3 "SUJ3") | [1.3520](/materials/material-no/1.3520 "1.3520") | Bearing steels | 0.93–1.05 | 16 | | [SUJ4](/materials/jis/suj4 "SUJ4") This grade’s own name | — | Bearing steels | 0.95–1.1 | — | | [SUJ4](/materials/jis/suj4 "SUJ4") | [1.3505](/materials/material-no/1.3505 "1.3505") | Bearing steels | 0.93–1.05 | 22 | | [SUJ5](/materials/jis/suj5 "SUJ5") This grade’s own name | — | Bearing steels | 0.95–1.1 | — | **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/30 "Previous") Page 31 of 47[Next](/materials/jis/page/32 "Next")