--- title: "ČSN steel grades — 647 designations — Page 12" description: "Steel grades designated under ČSN, with chemical composition, mechanical properties and equivalents in other standards. 647 designations across 451…" canonical: https://steelequivalents.com/materials/csn/page/12 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/csn/page/12.md cs: https://steelequivalents.com/cs/materiály/csn.md de: https://steelequivalents.com/de/werkstoffe/csn.md es: https://steelequivalents.com/es/materiales/csn.md fr: https://steelequivalents.com/fr/matériaux/csn.md hu: https://steelequivalents.com/hu/anyagok/csn.md it: https://steelequivalents.com/it/materiali/csn.md nl: https://steelequivalents.com/nl/materialen/csn.md pl: https://steelequivalents.com/pl/materiały/csn.md pt: https://steelequivalents.com/pt/materiais/csn.md ru: https://steelequivalents.com/ru/материалы/csn.md tr: https://steelequivalents.com/tr/malzemeler/csn.md zh: https://steelequivalents.com/zh/材料/csn.md ja: https://steelequivalents.com/ja/材料/csn.md ar: https://steelequivalents.com/ar/المواد/csn.md ko: https://steelequivalents.com/ko/재료/csn.md pt-br: https://steelequivalents.com/pt-br/materiais/csn.md hi: https://steelequivalents.com/hi/सामग्री/csn.md content_hash: sha256:fc4ab69b01be83b13a9811244f768d92a85f741676b0b36a3f8b98cca296758f generated: 2026-09-23 --- > **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/csn/page/12 > Canonical URL: https://steelequivalents.com/materials/csn/page/12 > 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. ČSN · 647 grades # ČSN steel grades — 647 designations — Page 12 Every grade designated under ČSN, 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. 3 of 50 rows differ and carry a “This grade’s own name” mark. ## Also known as 647 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [19572](/materials/csn/19572 "19572") | [1.2379](/materials/material-no/1.2379 "1.2379") | Tool steels for cold work | 1.45–1.6 | 20 | | [19573](/materials/csn/19573 "19573") | [1.2379](/materials/material-no/1.2379 "1.2379") | Tool steels for cold work | 1.45–1.6 | 20 | | [19573PH](/materials/csn/19573ph "19573PH") | [1.2379](/materials/material-no/1.2379 "1.2379") | Tool steels for cold work | 1.45–1.6 | 20 | | [19614](/materials/csn/19614 "19614") | [1.2721](/materials/material-no/1.2721 "1.2721") | Tool steels for cold work | 0.45–0.55 | 4 | | [19655](/materials/csn/19655 "19655") | [1.2767](/materials/material-no/1.2767 "1.2767") | Tool steels for cold work | 0.4–0.5 | 9 | | [19662](/materials/csn/19662 "19662") | [1.2714](/materials/material-no/1.2714 "1.2714") | Tool steels for hot work | 0.5–0.6 | 15 | | [19662](/materials/csn/19662 "19662") | [1.2713](/materials/material-no/1.2713 "1.2713") | Tool steels for cold work | 0.5–0.6 | 12 | | [19663](/materials/csn/19663 "19663") | [1.2714](/materials/material-no/1.2714 "1.2714") | Tool steels for hot work | 0.5–0.6 | 15 | | [19663](/materials/csn/19663 "19663") This grade’s own name | — | — | — | — | | [19665](/materials/csn/19665 "19665") This grade’s own name | — | — | — | — | | [19712](/materials/csn/19712 "19712") | — | — | 0.9–1.05 | 1 | | [19714](/materials/csn/19714 "19714") | [1.2453](/materials/material-no/1.2453 "1.2453") | Tool steels for cold work | 1.25–1.35 | 5 | | [19720](/materials/csn/19720 "19720") This grade’s own name | — | — | — | — | | [19721](/materials/csn/19721 "19721") | [1.2581](/materials/material-no/1.2581 "1.2581") | Tool steels for hot work | 0.25–0.35 | 18 | | [19721](/materials/csn/19721 "19721") | — | — | 0.3–0.4 | 1 | | [19732](/materials/csn/19732 "19732") | [1.2542](/materials/material-no/1.2542 "1.2542") | Tool steels for cold work | 0.4–0.5 | 12 | | [19733](/materials/csn/19733 "19733") | [1.2550](/materials/material-no/1.2550 "1.2550") | Tool steels for cold work | 0.55–0.65 | 15 | | [19733](/materials/csn/19733 "19733") | [1.2542](/materials/material-no/1.2542 "1.2542") | Tool steels for cold work | 0.4–0.5 | 12 | | [19735](/materials/csn/19735 "19735") | [1.2550](/materials/material-no/1.2550 "1.2550") | Tool steels for cold work | 0.55–0.65 | 15 | | [19735](/materials/csn/19735 "19735") | [1.2542](/materials/material-no/1.2542 "1.2542") | Tool steels for cold work | 0.4–0.5 | 12 | | [19810](/materials/csn/19810 "19810") | [1.3318](/materials/material-no/1.3318 "1.3318") | High-speed steels | 0.9–1 | 4 | | [19810](/materials/csn/19810 "19810") | [1.3355](/materials/material-no/1.3355 "1.3355") | High-speed steels | 0.73–0.83 | 22 | | [19820](/materials/csn/19820 "19820") | [1.3333](/materials/material-no/1.3333 "1.3333") | High-speed steels | 0.95–1.03 | 2 | | [19824](/materials/csn/19824 "19824") | [1.3355](/materials/material-no/1.3355 "1.3355") | High-speed steels | 0.73–0.83 | 22 | | [19829](/materials/csn/19829 "19829") | [1.3342](/materials/material-no/1.3342 "1.3342") | High-speed steels | 0.95–1.05 | 3 | | [19830](/materials/csn/19830 "19830") | [1.3339](/materials/material-no/1.3339 "1.3339") | High-speed steels | 0.8–0.88 | 16 | | [19830](/materials/csn/19830 "19830") | [1.3553](/materials/material-no/1.3553 "1.3553") | Bearing steels | 0.78–0.86 | 2 | | [19830](/materials/csn/19830 "19830") | [1.3343](/materials/material-no/1.3343 "1.3343") | High-speed steels | 0.86–0.94 | 19 | | [19830](/materials/csn/19830 "19830") | [1.2581](/materials/material-no/1.2581 "1.2581") | Tool steels for hot work | 0.25–0.35 | 18 | | [19837](/materials/csn/19837 "19837") | [1.3344](/materials/material-no/1.3344 "1.3344") | High-speed steels | 1.15–1.25 | 8 | | [19851](/materials/csn/19851 "19851") | [1.3246](/materials/material-no/1.3246 "1.3246") | High-speed steels | 1.05–1.15 | 5 | | [19852](/materials/csn/19852 "19852") | [1.3243](/materials/material-no/1.3243 "1.3243") | High-speed steels | 0.87–0.95 | 19 | | [19855](/materials/csn/19855 "19855") | — | — | — | 1 | | [19861](/materials/csn/19861 "19861") | [1.3207](/materials/material-no/1.3207 "1.3207") | High-speed steels | 1.2–1.35 | 14 | | [19902](/materials/csn/19902 "19902") | [1.2709](/materials/material-no/1.2709 "1.2709") | Tool steels for cold work | ≤ 0.03 | 1 | | [19902 PH](/materials/csn/19902-ph "19902 PH") | [1.2709](/materials/material-no/1.2709 "1.2709") | Tool steels for cold work | ≤ 0.03 | 1 | | [415320](/materials/csn/415320 "415320") | [1.7733](/materials/material-no/1.7733 "1.7733") | Heat-resistant structural steels | 0.2–0.28 | 15 | | [42 2942](/materials/csn/422-942 "42 2942") | [1.4501](/materials/material-no/1.4501 "1.4501") | Stainless steels | ≤ 0.03 | 8 | | [42 2942](/materials/csn/422-942 "42 2942") | [1.4410](/materials/material-no/1.4410 "1.4410") | Stainless steels | ≤ 0.03 | 9 | | [422 630](/materials/csn/422-630 "422 630") | [1.0416](/materials/material-no/1.0416 "1.0416") | Others | 0.15–0.2 | 17 | | [422 633](/materials/csn/422-633 "422 633") | [1.0416](/materials/material-no/1.0416 "1.0416") | Others | 0.15–0.2 | 17 | | [422 640](/materials/csn/422-640 "422 640") | [1.0443](/materials/material-no/1.0443 "1.0443") | Others | ≤ 0.11 | 13 | | [422 643](/materials/csn/422-643 "422 643") | [1.0443](/materials/material-no/1.0443 "1.0443") | Others | ≤ 0.11 | 13 | | [422 650](/materials/csn/422650 "422 650") | [1.0551](/materials/material-no/1.0551 "1.0551") | Unalloyed structural steels | ≤ 0.24 | 10 | | [422 660](/materials/csn/422-660 "422 660") | [1.0553](/materials/material-no/1.0553 "1.0553") | Unalloyed structural steels | ≤ 0.2 | 20 | | [422 670](/materials/csn/422-670 "422 670") | [1.0554](/materials/material-no/1.0554 "1.0554") | Unalloyed structural steels | ≤ 0.2 | 8 | | [422 714](/materials/csn/422714 "422 714") | [1.1133](/materials/material-no/1.1133 "1.1133") | Quenched and tempered steels | 0.17–0.23 | 20 | | [422 715](/materials/csn/422-715 "422 715") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [422 904](/materials/csn/422-904 "422 904") | [1.4008](/materials/material-no/1.4008 "1.4008") | Stainless steels | ≤ 0.1 | 5 | | [422 906](/materials/csn/422-906 "422 906") | [1.4027](/materials/material-no/1.4027 "1.4027") | Cast stainless steels | 0.16–0.23 | 14 | **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/csn/page/11 "Previous") Page 12 of 13[Next](/materials/csn/page/13 "Next")