--- title: "KS steel grades — 823 designations — Page 5" description: "Steel grades designated under KS, with chemical composition, mechanical properties and equivalents in other standards. 823 designations across 764…" canonical: https://steelequivalents.com/materials/ks/page/5 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/ks/page/5.md cs: https://steelequivalents.com/cs/materiály/ks.md de: https://steelequivalents.com/de/werkstoffe/ks.md es: https://steelequivalents.com/es/materiales/ks.md fr: https://steelequivalents.com/fr/matériaux/ks.md hu: https://steelequivalents.com/hu/anyagok/ks.md it: https://steelequivalents.com/it/materiali/ks.md nl: https://steelequivalents.com/nl/materialen/ks.md pl: https://steelequivalents.com/pl/materiały/ks.md pt: https://steelequivalents.com/pt/materiais/ks.md ru: https://steelequivalents.com/ru/материалы/ks.md tr: https://steelequivalents.com/tr/malzemeler/ks.md zh: https://steelequivalents.com/zh/材料/ks.md ja: https://steelequivalents.com/ja/材料/ks.md ar: https://steelequivalents.com/ar/المواد/ks.md ko: https://steelequivalents.com/ko/재료/ks.md pt-br: https://steelequivalents.com/pt-br/materiais/ks.md hi: https://steelequivalents.com/hi/सामग्री/ks.md content_hash: sha256:960e075107d879daf70b05900d8273c1a97ad971cf2275a18bed5930aa8a5265 generated: 2026-09-25 --- > **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/ks/page/5 > Canonical URL: https://steelequivalents.com/materials/ks/page/5 > 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. KS · 823 grades # KS steel grades — 823 designations — Page 5 Every grade designated under KS, 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. 3 of 50 rows differ and carry an “Indicative” mark. ## Also known as 823 designations | Grade | Category | C% by weight | Also in other standards | |---|---|---|---| | [SGD2](/materials/jis/sgd2 "SGD2") | Unalloyed structural steels | 0.1–0.15 | 1 | | [SGD3](/materials/jis/sgd3 "SGD3") | Unalloyed structural steels | 0.15–0.2 | 1 | | [SGD4](/materials/jis/sgd4 "SGD4") | Unalloyed structural steels | 0.2–0.25 | 1 | | [SGDA](/materials/jis/sgda "SGDA") | Unalloyed structural steels | — | 1 | | [SGDB](/materials/jis/sgdb "SGDB") | Unalloyed structural steels | — | 1 | | [SGV410](/materials/jis/sgv410 "SGV410") | — | ≤ 0.27 | 1 | | [SGV450](/materials/jis/sgv450 "SGV450") | — | ≤ 0.29 | 1 | | [SGV480](/materials/jis/sgv480 "SGV480") | — | ≤ 0.31 | 1 | | [SK2M](/materials/ks/sk2m "SK2M") | — | 1.1–1.3 | — | | [SK3M](/materials/ks/sk3m "SK3M") | — | 1–1.1 | — | | [SK4M](/materials/ks/sk4m "SK4M") | — | 0.9–1 | — | | [SK5M](/materials/ks/sk5m "SK5M") | — | 0.8–0.9 | — | | [SK6M](/materials/ks/sk6m "SK6M") | — | 0.7–0.8 | — | | [SK7M](/materials/ks/sk7m "SK7M") | — | 0.6–0.7 | — | | [SK85-CSP](/materials/ks/sk85-csp "SK85-CSP") | Spring steels | 0.8–0.9 | — | | [SK95-CSP](/materials/ks/sk95-csp "SK95-CSP") | Spring steels | 0.9–1 | — | | [SKC11](/materials/ks/skc11 "SKC11") | Tool steels for cold work | 0.75–0.85 | 13 | | [SKC24](/materials/ks/skc24 "SKC24") | — | 0.33–0.43 | — | | [SKC3](/materials/ks/skc3 "SKC3") | Unalloyed tool steels / carbon steels | 0.75–0.85 | 15 | | [SKC31](/materials/ks/skc31 "SKC31") | — | 0.12–0.25 | — | | [SKH10](/materials/ks/skh10 "SKH10") | High-speed steels | 1.3–1.45 | 12 | | [SKH2](/materials/ks/skh2 "SKH2") | High-speed steels | 0.73–0.83 | 22 | | [SKH3](/materials/ks/skh3 "SKH3") | High-speed steels | 0.75–0.83 | 14 | | [SKH4](/materials/ks/skh4 "SKH4") | High-speed steels | 0.72–0.8 | 6 | | [SKH40](/materials/jis/skh40 "SKH40") | High-speed steels | 1.23–1.33 | 1 | | [SKH50](/materials/jis/skh50 "SKH50") | High-speed steels | 0.77–0.87 | 1 | | [SKH51](/materials/ks/skh51 "SKH51") | High-speed steels | 0.86–0.94 | 19 | | [SKH51](/materials/ks/skh51 "SKH51") | High-speed steels | 0.8–0.88 | 16 | | [SKH52](/materials/ks/skh52 "SKH52") | High-speed steels | 1–1.1 | 2 | | [SKH53](/materials/jis/skh53 "SKH53") | High-speed steels | 1.15–1.25 | 1 | | [SKH53](/materials/jis/skh53 "SKH53") Indicative | — | 1.25–1.32 | 4 | | [SKH54](/materials/ks/skh54 "SKH54") | High-speed steels | 1.25–1.4 | 4 | | [SKH55](/materials/ks/skh55 "SKH55") | High-speed steels | 0.87–0.95 | 19 | | [SKH56](/materials/jis/skh56 "SKH56") | High-speed steels | 0.85–0.95 | 1 | | [SKH57](/materials/jis/skh57 "SKH57") | High-speed steels | 1.2–1.35 | 1 | | [SKH58](/materials/ks/skh58 "SKH58") | High-speed steels | 0.95–1.05 | 8 | | [SKH59](/materials/ks/skh59 "SKH59") | High-speed steels | 1.05–1.15 | 14 | | [SKH9](/materials/ks/skh9 "SKH9") Indicative | High-speed steels | 0.8–0.88 | 16 | | [SKS2M](/materials/jis/sks2m "SKS2M") | — | 1–1.1 | 1 | | [SKS41](/materials/jis/sks41 "SKS41") Indicative | — | 0.35–0.45 | 5 | | [SKS51M](/materials/jis/sks51m "SKS51M") | — | 0.75–0.85 | 1 | | [SKS5M](/materials/jis/sks5m "SKS5M") | — | 0.75–0.85 | 1 | | [SKS7M](/materials/jis/sks7m "SKS7M") | — | 1.1–1.2 | 1 | | [SKS95M](/materials/jis/sks95m "SKS95M") | — | 0.8–0.9 | 1 | | [SL2N255](/materials/jis/sl2n255 "SL2N255") | Low-temperature structural steels | ≤ 0.17 | 1 | | [SL3N255](/materials/jis/sl3n255 "SL3N255") | Low-temperature structural steels | ≤ 0.15 | 1 | | [SL3N275](/materials/jis/sl3n275 "SL3N275") | Low-temperature structural steels | ≤ 0.17 | 1 | | [SL3N440](/materials/jis/sl3n440 "SL3N440") | Low-temperature structural steels | ≤ 0.15 | 1 | | [SL5N590](/materials/jis/sl5n590 "SL5N590") | Low-temperature structural steels | ≤ 0.13 | 1 | | [SL9N520](/materials/jis/sl9n520 "SL9N520") | Low-temperature structural steels | ≤ 0.12 | 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/ks/page/4 "Previous") Page 5 of 17[Next](/materials/ks/page/6 "Next")