--- title: "KS steel grades — 823 designations — Page 11" 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/11 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/ks/page/11.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: sha256:6c2265e291af6ea444f5addf5c541f3e68a21b8c3418f672c0709e9044c6ac9c 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/11 > Canonical URL: https://steelequivalents.com/materials/ks/page/11 > 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 11 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. 7 of 50 rows differ and carry an “Indicative” mark. ## Also known as 823 designations | Grade | Category | C% by weight | |---|---|---| | [STR309](/materials/ks/str309 "STR309") | Heat resistant steels | ≤ 0.2 | | [STR309](/materials/ks/str309 "STR309") Indicative | Heat resistant steels | ≤ 0.2 | | [STR31](/materials/ks/str31 "STR31") | Heat resistant steels | 0.35–0.45 | | [STR310](/materials/ks/str310 "STR310") | Heat resistant steels | ≤ 0.25 | | [STR330](/materials/ks/str330 "STR330") | Heat resistant steels | ≤ 0.15 | | [STR35](/materials/ks/str35 "STR35") | Heat resistant steels | 0.48–0.58 | | [STR35](/materials/ks/str35 "STR35") Indicative | Valve steels | 0.48–0.58 | | [STR36](/materials/ks/str36 "STR36") | Heat resistant steels | 0.48–0.58 | | [STR36](/materials/ks/str36 "STR36") Indicative | Valve steels | 0.48–0.58 | | [STR37](/materials/ks/str37 "STR37") | Heat resistant steels | 0.15–0.25 | | [STR38](/materials/ks/str38 "STR38") | Heat resistant steels | 0.25–0.35 | | [STR4](/materials/ks/str4 "STR4") | Heat resistant steels | 0.75–0.85 | | [STR409](/materials/ks/str409 "STR409") | Heat resistant steels | — | | [STR409L](/materials/ks/str409l "STR409L") | Heat resistant steels | — | | [STR446](/materials/ks/str446 "STR446") | Heat resistant steels | ≤ 0.2 | | [STR600](/materials/ks/str600 "STR600") | Heat resistant steels | 0.15–0.2 | | [STR616](/materials/ks/str616 "STR616") | Heat resistant steels | 0.2–0.25 | | [STR660](/materials/ks/str660 "STR660") | Heat resistant steels | ≤ 0.08 | | [STR661](/materials/ks/str661 "STR661") | Heat resistant steels | 0.08–0.16 | | [STS11](/materials/ks/sts11 "STS11") | — | 1.2–1.3 | | [STS2](/materials/ks/sts2 "STS2") | — | 1–1.1 | | [STS2](/materials/ks/sts2 "STS2") Indicative | Tool steels for cold work | 1–1.1 | | [STS201](/materials/ks/sts201 "STS201") | Stainless steels | ≤ 0.15 | | [STS201](/materials/ks/sts201 "STS201") Indicative | Others | ≤ 0.15 | | [STS201](/materials/ks/sts201 "STS201") Indicative | Non-magnetic steels | ≤ 0.15 | | [STS202](/materials/ks/sts202 "STS202") | Stainless steels | ≤ 0.15 | | [STS21](/materials/ks/sts21 "STS21") | — | 1–1.1 | | [STS3](/materials/ks/sts3 "STS3") | — | 0.9–1 | | [STS3](/materials/ks/sts3 "STS3") Indicative | Tool steels for cold work | 1–1.1 | | [STS301](/materials/ks/sts301 "STS301") | Stainless steels | ≤ 0.15 | | [STS302](/materials/ks/sts302 "STS302") | Stainless steels | ≤ 0.15 | | [STS302B](/materials/ks/sts302b "STS302B") | — | ≤ 0.15 | | [STS302FB](/materials/ks/sts302fb "STS302FB") | — | ≤ 0.15 | | [STS303](/materials/ks/sts303 "STS303") | Stainless steels | ≤ 0.15 | | [STS303Cu](/materials/ks/sts303cu "STS303Cu") | Stainless steels | ≤ 0.15 | | [STS303Se](/materials/ks/sts303se "STS303Se") | Stainless steels | ≤ 0.15 | | [STS304](/materials/ks/sts304 "STS304") | Stainless steels | ≤ 0.08 | | [STS304CA](/materials/ks/sts304ca "STS304CA") | Stainless steels | ≤ 0.08 | | [STS304FB](/materials/ks/sts304fb "STS304FB") | — | ≤ 0.08 | | [STS304HFB](/materials/ks/sts304hfb "STS304HFB") | — | 0.04–0.1 | | [STS304HTB](/materials/ks/sts304htb "STS304HTB") | Stainless steels | 0.04–0.1 | | [STS304J3](/materials/ks/sts304j3 "STS304J3") | Stainless steels | ≤ 0.08 | | [STS304L](/materials/ks/sts304l "STS304L") | Stainless steels | ≤ 0.03 | | [STS304LCA](/materials/ks/sts304lca "STS304LCA") | Stainless steels | ≤ 0.03 | | [STS304LFB](/materials/ks/sts304lfb "STS304LFB") | — | ≤ 0.03 | | [STS304LN](/materials/ks/sts304ln "STS304LN") | Stainless steels | ≤ 0.03 | | [STS304LTB](/materials/ks/sts304ltb "STS304LTB") | Stainless steels | ≤ 0.03 | | [STS304LTBS](/materials/ks/sts304ltbs "STS304LTBS") | Stainless steels | ≤ 0.03 | | [STS304N1](/materials/ks/sts304n1 "STS304N1") | Stainless steels | ≤ 0.08 | | [STS304N2](/materials/ks/sts304n2 "STS304N2") | Stainless steels | ≤ 0.08 | **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/10 "Previous") Page 11 of 17[Next](/materials/ks/page/12 "Next")