--- title: "KS steel grades — 823 designations — Page 4" 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/4 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/ks/page/4.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: sha256:1fe2684936b3bc83944e06dd5250cfd2d194ff279378e80621779599776bc239 generated: 2026-09-22 --- > **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/4 > Canonical URL: https://steelequivalents.com/materials/ks/page/4 > 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 4 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. 2 of 50 rows differ and carry an “Indicative” mark. ## Also known as 823 designations | Grade | Category | C% by weight | Also in other standards | |---|---|---|---| | [SF390A](/materials/jis/sf390a "SF390A") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SF440A](/materials/jis/sf440a "SF440A") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SF490A](/materials/jis/sf490a "SF490A") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SF540A](/materials/jis/sf540a "SF540A") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SF540B](/materials/jis/sf540b "SF540B") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SF590A](/materials/jis/sf590a "SF590A") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SF590B](/materials/jis/sf590b "SF590B") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SF640B](/materials/jis/sf640b "SF640B") | Unalloyed structural steels | ≤ 0.6 | 1 | | [SFB1](/materials/jis/sfb1 "SFB1") | Unalloyed structural steels | 0.05–0.2 | 1 | | [SFB2](/materials/jis/sfb2 "SFB2") | Unalloyed structural steels | 0.1–0.25 | 1 | | [SFB3](/materials/jis/sfb3 "SFB3") | Unalloyed structural steels | 0.15–0.3 | 1 | | [SFB4](/materials/jis/sfb4 "SFB4") | Unalloyed structural steels | 0.2–0.38 | 1 | | [SFB5](/materials/jis/sfb5 "SFB5") | Unalloyed structural steels | 0.28–0.45 | 1 | | [SFB6](/materials/jis/sfb6 "SFB6") | Unalloyed structural steels | 0.35–0.5 | 1 | | [SFB7](/materials/jis/sfb7 "SFB7") | Unalloyed structural steels | 0.4–0.6 | 1 | | [SFL1](/materials/jis/sfl1 "SFL1") | Low-temperature structural steels | ≤ 0.3 | 1 | | [SFL2](/materials/jis/sfl2 "SFL2") | Low-temperature structural steels | ≤ 0.3 | 1 | | [SFL3](/materials/jis/sfl3 "SFL3") | Low-temperature structural steels | ≤ 0.2 | 1 | | [SFVAF1](/materials/jis/sfvaf1 "SFVAF1") | — | ≤ 0.3 | 1 | | [SFVAF11A](/materials/jis/sfvaf11a "SFVAF11A") | — | ≤ 0.2 | 1 | | [SFVAF11B](/materials/jis/sfvaf11b "SFVAF11B") | — | ≤ 0.2 | 1 | | [SFVAF12](/materials/jis/sfvaf12 "SFVAF12") | — | ≤ 0.2 | 1 | | [SFVAF12](/materials/jis/sfvaf12 "SFVAF12") Indicative | Case hardening steels | 0.13–0.17 | 18 | | [SFVAF12](/materials/jis/sfvaf12 "SFVAF12") Indicative | Heat-resistant structural steels | 0.08–0.18 | 22 | | [SFVAF2](/materials/jis/sfvaf2 "SFVAF2") | — | ≤ 0.2 | 1 | | [SFVAF21A](/materials/jis/sfvaf21a "SFVAF21A") | — | ≤ 0.15 | 1 | | [SFVAF21B](/materials/jis/sfvaf21b "SFVAF21B") | — | ≤ 0.15 | 1 | | [SFVAF22A](/materials/jis/sfvaf22a "SFVAF22A") | — | ≤ 0.15 | 1 | | [SFVAF22B](/materials/jis/sfvaf22b "SFVAF22B") | — | ≤ 0.15 | 1 | | [SFVAF5A](/materials/jis/sfvaf5a "SFVAF5A") | — | ≤ 0.15 | 1 | | [SFVAF5B](/materials/jis/sfvaf5b "SFVAF5B") | — | ≤ 0.15 | 1 | | [SFVAF5C](/materials/jis/sfvaf5c "SFVAF5C") | — | ≤ 0.25 | 1 | | [SFVAF5D](/materials/jis/sfvaf5d "SFVAF5D") | — | ≤ 0.25 | 1 | | [SFVAF9](/materials/jis/sfvaf9 "SFVAF9") | — | ≤ 0.15 | 1 | | [SFVC1](/materials/jis/sfvc1 "SFVC1") | — | ≤ 0.3 | 1 | | [SFVC2A](/materials/jis/sfvc2a "SFVC2A") | — | ≤ 0.35 | 1 | | [SFVC2B](/materials/jis/sfvc2b "SFVC2B") | — | ≤ 0.3 | 1 | | [SFVCMF22B](/materials/jis/sfvcmf22b "SFVCMF22B") | — | ≤ 0.17 | 1 | | [SFVCMF22V](/materials/jis/sfvcmf22v "SFVCMF22V") | — | ≤ 0.17 | 1 | | [SFVCMF3V](/materials/jis/sfvcmf3v "SFVCMF3V") | — | ≤ 0.17 | 1 | | [SFVQ1A](/materials/jis/sfvq1a "SFVQ1A") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SFVQ1B](/materials/jis/sfvq1b "SFVQ1B") | Quenched and tempered steels | ≤ 0.25 | 1 | | [SFVQ2A](/materials/jis/sfvq2a "SFVQ2A") | Quenched and tempered steels | ≤ 0.27 | 1 | | [SFVQ2B](/materials/jis/sfvq2b "SFVQ2B") | Quenched and tempered steels | ≤ 0.27 | 1 | | [SFVQ3](/materials/jis/sfvq3 "SFVQ3") | Quenched and tempered steels | ≤ 0.23 | 1 | | [SG255](/materials/jis/sg255 "SG255") | — | ≤ 0.2 | 1 | | [SG295](/materials/jis/sg295 "SG295") | — | ≤ 0.2 | 1 | | [SG325](/materials/jis/sg325 "SG325") | — | ≤ 0.2 | 1 | | [SG365](/materials/jis/sg365 "SG365") | — | ≤ 0.2 | 1 | | [SGD1](/materials/jis/sgd1 "SGD1") | Unalloyed structural steels | ≤ 0.1 | 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/3 "Previous") Page 4 of 17[Next](/materials/ks/page/5 "Next")