--- title: "KS steel grades — 823 designations — Page 8" 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/8 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/ks/page/8.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: sha256:563bf6635bf2c6007126a3b43d16dabf21a06ec6d0cf75327efad5bfc6987a35 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/8 > Canonical URL: https://steelequivalents.com/materials/ks/page/8 > 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 8 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. 12 of 50 rows differ and carry an “Indicative” mark. ## Also known as 823 designations | Grade | Category | C% by weight | Also in other standards | |---|---|---|---| | [SPS12](/materials/ks/sps12 "SPS12") | — | 0.51–0.59 | — | | [SPS13](/materials/ks/sps13 "SPS13") | — | 0.56–0.64 | — | | [SPS290](/materials/ks/sps290 "SPS290") | Unalloyed structural steels | — | — | | [SPS400](/materials/ks/sps400 "SPS400") | Unalloyed structural steels | ≤ 0.25 | — | | [SPS490](/materials/ks/sps490 "SPS490") | Unalloyed structural steels | ≤ 0.18 | — | | [SPS5](/materials/ks/sps5 "SPS5") Indicative | Spring steels | 0.52–0.59 | 18 | | [SPS500](/materials/ks/sps500 "SPS500") | Unalloyed structural steels | ≤ 0.24 | — | | [SPS540](/materials/ks/sps540 "SPS540") | Unalloyed structural steels | ≤ 0.23 | — | | [SPS5A](/materials/ks/sps5a "SPS5A") Indicative | Spring steels | 0.52–0.59 | 18 | | [SPS6](/materials/ks/sps6 "SPS6") | — | 0.56–0.64 | — | | [SPS6](/materials/ks/sps6 "SPS6") Indicative | Quenched and tempered steels | 0.47–0.55 | 27 | | [SPS7](/materials/ks/sps7 "SPS7") | — | 0.56–0.64 | — | | [SPS9](/materials/ks/sps9 "SPS9") | — | 0.52–0.6 | — | | [SPS9A](/materials/ks/sps9a "SPS9A") | — | 0.56–0.64 | — | | [SQV1A](/materials/jis/sqv1a "SQV1A") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SQV1B](/materials/jis/sqv1b "SQV1B") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SQV2A](/materials/jis/sqv2a "SQV2A") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SQV2B](/materials/jis/sqv2b "SQV2B") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SQV3A](/materials/jis/sqv3a "SQV3A") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SQV3B](/materials/jis/sqv3b "SQV3B") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SR240](/materials/ks/sr240 "SR240") | Unalloyed structural steels | — | — | | [SR300](/materials/ks/sr300 "SR300") | Unalloyed structural steels | — | — | | [SS330](/materials/ks/ss330 "SS330") | Unalloyed structural steels | — | 22 | | [SS330](/materials/ks/ss330 "SS330") | Unalloyed structural steels | ≤ 0.15 | 18 | | [SS400](/materials/jis/ss400 "SS400") | Unalloyed structural steels | — | 1 | | [SS490](/materials/jis/ss490 "SS490") | Unalloyed structural steels | — | 1 | | [SS490](/materials/jis/ss490 "SS490") Indicative | Unalloyed structural steels | — | 23 | | [SS490](/materials/jis/ss490 "SS490") Indicative | Unalloyed structural steels | — | 23 | | [SS540](/materials/jis/ss540 "SS540") | Unalloyed structural steels | ≤ 0.3 | 1 | | [SS590](/materials/ks/ss590 "SS590") | Unalloyed structural steels | ≤ 0.3 | — | | [SSC12](/materials/ks/ssc12 "SSC12") Indicative | Cast stainless steels | ≤ 0.12 | 15 | | [SSC13A](/materials/ks/ssc13a "SSC13A") | Heat-resistant cast steels | ≤ 0.08 | — | | [SSC13A](/materials/ks/ssc13a "SSC13A") Indicative | Cast stainless steels | ≤ 0.12 | 15 | | [SSC14A](/materials/ks/ssc14a "SSC14A") | Heat-resistant cast steels | ≤ 0.08 | — | | [SSC16A](/materials/ks/ssc16a "SSC16A") | Heat-resistant cast steels | ≤ 0.03 | — | | [SSC17](/materials/ks/ssc17 "SSC17") | Heat-resistant cast steels | ≤ 0.2 | — | | [SSC17](/materials/ks/ssc17 "SSC17") Indicative | Heat-resistant cast steels | 0.3–0.5 | 13 | | [SSC18](/materials/ks/ssc18 "SSC18") | Heat-resistant cast steels | ≤ 0.02 | — | | [SSC19A](/materials/ks/ssc19a "SSC19A") | Heat-resistant cast steels | ≤ 0.03 | — | | [SSC2](/materials/ks/ssc2 "SSC2") Indicative | Cast stainless steels | 0.16–0.23 | 14 | | [SSC21](/materials/ks/ssc21 "SSC21") | Heat-resistant cast steels | — | — | | [SSC23](/materials/ks/ssc23 "SSC23") | Heat-resistant cast steels | ≤ 0.07 | — | | [STB1](/materials/ks/stb1 "STB1") | — | 0.95–1.1 | — | | [STB2](/materials/ks/stb2 "STB2") | — | 0.95–1.1 | — | | [STB2](/materials/ks/stb2 "STB2") Indicative | Bearing steels | 0.93–1.05 | 22 | | [STB2](/materials/ks/stb2 "STB2") Indicative | Tool steels for cold work | 0.95–1.1 | 21 | | [STB3](/materials/ks/stb3 "STB3") | — | 0.95–1.1 | — | | [STB4](/materials/ks/stb4 "STB4") | Bearing steels | 0.95–1.1 | — | | [STB4](/materials/ks/stb4 "STB4") Indicative | Bearing steels | 0.93–1.05 | 22 | | [STB5](/materials/ks/stb5 "STB5") | 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/ks/page/7 "Previous") Page 8 of 17[Next](/materials/ks/page/9 "Next")