--- title: "JIS steel grades — 2322 designations — Page 23" 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/23 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/jis/page/23.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: sha256:884a5f13bbc87cf50e0a01e8e4076a8705e52dd4daedb5159a3a6f2b04594d2e 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/23 > Canonical URL: https://steelequivalents.com/materials/jis/page/23 > 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 23 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. 25 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 | |---|---|---|---|---| | [SMn420H](/materials/ks/smn420h "SMn420H") | [1.1133](/materials/material-no/1.1133 "1.1133") | Quenched and tempered steels | 0.17–0.23 | 20 | | [SMn420H](/materials/ks/smn420h "SMn420H") | [1.1160](/materials/material-no/1.1160 "1.1160") | Low-temperature structural steels | 0.18–0.25 | 6 | | [SMn420HRCH](/materials/jis/smn420hrch "SMn420HRCH") This grade’s own name | — | Cold extrusion steels | 0.16–0.23 | — | | [SMn420RCH](/materials/jis/smn420rch "SMn420RCH") This grade’s own name | — | Cold extrusion steels | 0.17–0.23 | — | | [SMn423H](/materials/jis/smn423h "SMn423H") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [SMn433](/materials/jis/smn433 "SMn433") This grade’s own name | — | — | 0.3–0.36 | — | | [SMn433](/materials/jis/smn433 "SMn433") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [SMn433](/materials/jis/smn433 "SMn433") | [1.0762](/materials/material-no/1.0762 "1.0762") | Free cutting steels | 0.4–0.48 | 20 | | [SMn433H](/materials/jis/smn433h "SMn433H") | [1.1173](/materials/material-no/1.1173 "1.1173") | Quenched and tempered steels | 0.27–0.34 | 7 | | [SMn433H](/materials/jis/smn433h "SMn433H") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [SMn433H](/materials/jis/smn433h "SMn433H") | [1.0762](/materials/material-no/1.0762 "1.0762") | Free cutting steels | 0.4–0.48 | 20 | | [SMn433HRCH](/materials/jis/smn433hrch "SMn433HRCH") This grade’s own name | — | Cold extrusion steels | 0.29–0.36 | — | | [SMn433RCH](/materials/jis/smn433rch "SMn433RCH") This grade’s own name | — | Cold extrusion steels | 0.3–0.36 | — | | [SMn438](/materials/ks/smn438 "SMn438") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [SMn438](/materials/ks/smn438 "SMn438") | [1.1127](/materials/material-no/1.1127 "1.1127") | Quenched and tempered steels | 0.34–0.42 | 6 | | [SMn438](/materials/ks/smn438 "SMn438") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [SMn438H](/materials/ks/smn438h "SMn438H") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [SMn438HRCH](/materials/jis/smn438hrch "SMn438HRCH") This grade’s own name | — | Cold extrusion steels | 0.34–0.41 | — | | [SMn438M](/materials/jis/smn438m "SMn438M") This grade’s own name | — | — | 0.35–0.41 | 1 | | [SMn438RCH](/materials/jis/smn438rch "SMn438RCH") This grade’s own name | — | Cold extrusion steels | 0.35–0.41 | — | | [SMn443](/materials/jis/smn443 "SMn443") | [1.1127](/materials/material-no/1.1127 "1.1127") | Quenched and tempered steels | 0.34–0.42 | 6 | | [SMn443](/materials/jis/smn443 "SMn443") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [SMn443](/materials/jis/smn443 "SMn443") | [1.5069](/materials/material-no/1.5069 "1.5069") | High-strength steels | 0.35 | 7 | | [SMn443](/materials/jis/smn443 "SMn443") | [1.5223](/materials/material-no/1.5223 "1.5223") | Quenched and tempered steels | 0.38–0.45 | 8 | | [SMn443](/materials/jis/smn443 "SMn443") | [1.0912](/materials/material-no/1.0912 "1.0912") | Others | 0.42–0.5 | 11 | | [SMn443H](/materials/jis/smn443h "SMn443H") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [SMn443HRCH](/materials/jis/smn443hrch "SMn443HRCH") This grade’s own name | — | Cold extrusion steels | 0.29–0.36 | — | | [SMn443M](/materials/jis/smn443m "SMn443M") This grade’s own name | — | — | 0.4–0.46 | 1 | | [SMn443RCH](/materials/jis/smn443rch "SMn443RCH") This grade’s own name | — | Cold extrusion steels | 0.4–0.46 | — | | [SMnC420](/materials/jis/smnc420 "SMnC420") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [SMnC420H](/materials/jis/smnc420h "SMnC420H") This grade’s own name | — | — | 0.16–0.23 | — | | [SMnC420H](/materials/jis/smnc420h "SMnC420H") | [1.7147](/materials/material-no/1.7147 "1.7147") | Case hardening steels | 0.17–0.22 | 15 | | [SMnC420H](/materials/jis/smnc420h "SMnC420H") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [SMnC420RCH](/materials/jis/smnc420rch "SMnC420RCH") This grade’s own name | — | Cold extrusion steels | 0.17–0.23 | — | | [SMnC443](/materials/jis/smnc443 "SMnC443") This grade’s own name | — | — | 0.4–0.46 | — | | [SMnC443H](/materials/jis/smnc443h "SMnC443H") This grade’s own name | — | — | 0.39–0.46 | — | | [SMnC443RCH](/materials/jis/smnc443rch "SMnC443RCH") This grade’s own name | — | Cold extrusion steels | 0.4–0.46 | — | | [SN400A](/materials/jis/sn400a "SN400A") This grade’s own name | — | Unalloyed structural steels | ≤ 0.24 | — | | [SN400B](/materials/jis/sn400b "SN400B") This grade’s own name | — | Unalloyed structural steels | ≤ 0.22 | — | | [SN400B](/materials/jis/sn400b "SN400B") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [SN400C](/materials/jis/sn400c "SN400C") This grade’s own name | — | Unalloyed structural steels | ≤ 0.22 | — | | [SN400C](/materials/jis/sn400c "SN400C") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [SN490B](/materials/jis/sn490b "SN490B") This grade’s own name | — | Unalloyed structural steels | ≤ 0.2 | — | | [SN490B](/materials/jis/sn490b "SN490B") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [SN490C](/materials/jis/sn490c "SN490C") This grade’s own name | — | Unalloyed structural steels | ≤ 0.2 | — | | [SN490C](/materials/jis/sn490c "SN490C") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [SNB16](/materials/jis/snb16 "SNB16") This grade’s own name | — | — | 0.36–0.44 | — | | [SNB21-1](/materials/jis/snb21-1 "SNB21-1") This grade’s own name | — | — | 0.36–0.44 | — | | [SNB21-2](/materials/jis/snb21-2 "SNB21-2") This grade’s own name | — | — | 0.36–0.44 | — | | [SNB21-3](/materials/jis/snb21-3 "SNB21-3") This grade’s own name | — | — | 0.36–0.44 | — | **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/22 "Previous") Page 23 of 47[Next](/materials/jis/page/24 "Next")