--- title: "ČSN steel grades — 647 designations" 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 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/csn.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:fcd59f85937ccd22472e070a2f97671f7f34a9cda65d43128924c839669ce180 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/csn > Canonical URL: https://steelequivalents.com/materials/csn > 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 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 | |---|---|---|---|---| | [10 500 Hž](/materials/csn/10-500-hz "10 500 Hž") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [10 500 Hž](/materials/csn/10-500-hz "10 500 Hž") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [10000](/materials/csn/10000 "10000") | [1.0035](/materials/material-no/1.0035 "1.0035") | Unalloyed structural steels | — | 22 | | [10000](/materials/csn/10000 "10000") | [1.0033](/materials/material-no/1.0033 "1.0033") | Unalloyed structural steels | ≤ 0.11 | 3 | | [10000](/materials/csn/10000 "10000") | [1.0034](/materials/material-no/1.0034 "1.0034") | Unalloyed structural steels | ≤ 0.15 | 12 | | [10004](/materials/csn/10004 "10004") | [1.0035](/materials/material-no/1.0035 "1.0035") | Unalloyed structural steels | — | 22 | | [10022](/materials/csn/10022 "10022") | [1.0408](/materials/material-no/1.0408 "1.0408") | Quenched and tempered steels | ≤ 0.21 | 3 | | [10216](/materials/csn/10216 "10216") This grade’s own name | — | — | — | — | | [10216](/materials/csn/10216 "10216") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [10216](/materials/csn/10216 "10216") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [10370](/materials/csn/10370 "10370") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [10370](/materials/csn/10370 "10370") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 19 | | [10420](/materials/csn/10420 "10420") | [1.0077](/materials/material-no/1.0077 "1.0077") | Unalloyed structural steels | ≤ 0.25 | 2 | | [10420](/materials/csn/10420 "10420") | [1.0042](/materials/material-no/1.0042 "1.0042") | Unalloyed structural steels | ≤ 0.23 | 3 | | [10425](/materials/csn/10425 "10425") | [1.0433](/materials/material-no/1.0433 "1.0433") | Others | — | 2 | | [10505](/materials/csn/10505 "10505") This grade’s own name | — | — | — | — | | [11 320](/materials/csn/11320 "11 320") | [1.0320](/materials/material-no/1.0320 "1.0320") | Unalloyed structural steels | ≤ 0.1 | 1 | | [11 418](/materials/csn/11418 "11 418") | [1.0426](/materials/material-no/1.0426 "1.0426") | Aging resistant steels | 0.08–0.2 | 17 | | [11 448](/materials/csn/11448 "11 448") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [11 453](/materials/csn/11453 "11 453") | [1.0408](/materials/material-no/1.0408 "1.0408") | Quenched and tempered steels | ≤ 0.21 | 3 | | [11 481](/materials/csn/11481 "11 481") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [11 523](/materials/csn/11523 "11 523") | [1.0580](/materials/material-no/1.0580 "1.0580") | Unalloyed structural steels | ≤ 0.22 | 10 | | [11 523](/materials/csn/11523 "11 523") This grade’s own name | — | — | — | — | | [11109](/materials/csn/11109 "11109") | [1.0715](/materials/material-no/1.0715 "1.0715") | Free cutting steels | ≤ 0.14 | 14 | | [11110](/materials/csn/11110 "11110") | [1.0721](/materials/material-no/1.0721 "1.0721") | Free cutting steels | 0.07–0.13 | 15 | | [11120](/materials/csn/11120 "11120") | [1.0725](/materials/material-no/1.0725 "1.0725") | Free cutting steels | 0.12–0.18 | 5 | | [11120](/materials/csn/11120 "11120") | [1.0724](/materials/material-no/1.0724 "1.0724") | Free cutting steels | 0.18–0.25 | 1 | | [11140](/materials/csn/11140 "11140") | [1.0726](/materials/material-no/1.0726 "1.0726") | Free cutting steels | 0.32–0.39 | 15 | | [11140](/materials/csn/11140 "11140") | [1.0762](/materials/material-no/1.0762 "1.0762") | Free cutting steels | 0.4–0.48 | 20 | | [11300](/materials/csn/11300 "11300") | [1.0314](/materials/material-no/1.0314 "1.0314") | Unalloyed structural steels | ≤ 0.03 | 14 | | [11300](/materials/csn/11300 "11300") | [1.0330](/materials/material-no/1.0330 "1.0330") | Unalloyed structural steels | ≤ 0.12 | 17 | | [11301](/materials/csn/11301 "11301") | [1.0333](/materials/material-no/1.0333 "1.0333") | Unalloyed structural steels | ≤ 0.08 | 4 | | [11301](/materials/csn/11301 "11301") | [1.0347](/materials/material-no/1.0347 "1.0347") | Unalloyed structural steels | ≤ 0.1 | 12 | | [11301](/materials/csn/11301 "11301") | [1.0314](/materials/material-no/1.0314 "1.0314") | Unalloyed structural steels | ≤ 0.03 | 14 | | [11304](/materials/csn/11304 "11304") | [1.0347](/materials/material-no/1.0347 "1.0347") | Unalloyed structural steels | ≤ 0.1 | 12 | | [11304](/materials/csn/11304 "11304") | [1.0335](/materials/material-no/1.0335 "1.0335") | Unalloyed structural steels | ≤ 0.08 | 12 | | [11304](/materials/csn/11304 "11304") | [1.0336](/materials/material-no/1.0336 "1.0336") | Unalloyed structural steels | ≤ 0.09 | 2 | | [11304](/materials/csn/11304 "11304") | [1.0322](/materials/material-no/1.0322 "1.0322") | Unalloyed structural steels | ≤ 0.12 | 17 | | [11304](/materials/csn/11304 "11304") | [1.0330](/materials/material-no/1.0330 "1.0330") | Unalloyed structural steels | ≤ 0.12 | 17 | | [11305](/materials/csn/11305 "11305") | [1.0335](/materials/material-no/1.0335 "1.0335") | Unalloyed structural steels | ≤ 0.08 | 12 | | [11305](/materials/csn/11305 "11305") | [1.0338](/materials/material-no/1.0338 "1.0338") | Unalloyed structural steels | ≤ 0.08 | 18 | | [11305](/materials/csn/11305 "11305") | [1.0389](/materials/material-no/1.0389 "1.0389") | Unalloyed structural steels | ≤ 0.08 | 2 | | [11320](/materials/csn/11320 "11320") | [1.0332](/materials/material-no/1.0332 "1.0332") | Unalloyed structural steels | ≤ 0.12 | 16 | | [11320](/materials/csn/11320 "11320") | [1.0322](/materials/material-no/1.0322 "1.0322") | Unalloyed structural steels | ≤ 0.12 | 17 | | [11321](/materials/csn/11321 "11321") | [1.0330](/materials/material-no/1.0330 "1.0330") | Unalloyed structural steels | ≤ 0.12 | 17 | | [11321](/materials/csn/11321 "11321") | [1.0338](/materials/material-no/1.0338 "1.0338") | Unalloyed structural steels | ≤ 0.08 | 18 | | [11321](/materials/csn/11321 "11321") | [1.0322](/materials/material-no/1.0322 "1.0322") | Unalloyed structural steels | ≤ 0.12 | 17 | | [11325](/materials/csn/11325 "11325") | [1.0398](/materials/material-no/1.0398 "1.0398") | Unalloyed structural steels | ≤ 0.1 | 5 | | [11325](/materials/csn/11325 "11325") | [1.0338](/materials/material-no/1.0338 "1.0338") | Unalloyed structural steels | ≤ 0.08 | 18 | | [11325](/materials/csn/11325 "11325") | [1.0322](/materials/material-no/1.0322 "1.0322") | Unalloyed structural steels | ≤ 0.12 | 17 | **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. Page 1 of 13[Next](/materials/csn/page/2 "Next")