--- title: "ČSN steel grades — 647 designations — Page 3" 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/3 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/csn/page/3.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:c2aed86468387183fef966f45a4144c66ab891428bd8a6db06b3458ccb100384 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/page/3 > Canonical URL: https://steelequivalents.com/materials/csn/page/3 > 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 3 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. 2 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 | |---|---|---|---|---| | [11443](/materials/csn/11443 "11443") | [1.0128](/materials/material-no/1.0128 "1.0128") | Unalloyed structural steels | ≤ 0.21 | 5 | | [11443](/materials/csn/11443 "11443") | [1.0149](/materials/material-no/1.0149 "1.0149") | Unalloyed structural steels | ≤ 0.2 | 2 | | [11443](/materials/csn/11443 "11443") | [1.0256](/materials/material-no/1.0256 "1.0256") | Unalloyed structural steels | ≤ 0.21 | 3 | | [11444](/materials/csn/11444 "11444") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [11448](/materials/csn/11448 "11448") | [1.0138](/materials/material-no/1.0138 "1.0138") | Unalloyed structural steels | ≤ 0.2 | 2 | | [11448](/materials/csn/11448 "11448") | [1.0145](/materials/material-no/1.0145 "1.0145") | Unalloyed structural steels | ≤ 0.18 | 8 | | [11449](/materials/csn/11449 "11449") | [1.0509](/materials/material-no/1.0509 "1.0509") | Others | 0.16–0.22 | 2 | | [11453](/materials/csn/11453 "11453") | [1.0256](/materials/material-no/1.0256 "1.0256") | Unalloyed structural steels | ≤ 0.21 | 3 | | [11474](/materials/csn/11474 "11474") | [1.0455](/materials/material-no/1.0455 "1.0455") | Others | ≤ 0.23 | 2 | | [11474](/materials/csn/11474 "11474") | [1.0445](/materials/material-no/1.0445 "1.0445") | Higher strength steels | — | 12 | | [11478](/materials/csn/11478 "11478") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [11478](/materials/csn/11478 "11478") | [1.0491](/materials/material-no/1.0491 "1.0491") | Fine-grain structural steels | ≤ 0.16 | 5 | | [11478](/materials/csn/11478 "11478") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [11481](/materials/csn/11481 "11481") | [1.0481](/materials/material-no/1.0481 "1.0481") | Heat-resistant structural steels | 0.08–0.2 | 17 | | [11483](/materials/csn/11483 "11483") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [11483](/materials/csn/11483 "11483") | [1.0580](/materials/material-no/1.0580 "1.0580") | Unalloyed structural steels | ≤ 0.22 | 10 | | [11483](/materials/csn/11483 "11483") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [11500](/materials/csn/11500 "11500") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [11500](/materials/csn/11500 "11500") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [11503](/materials/csn/11503 "11503") | [1.0566](/materials/material-no/1.0566 "1.0566") | Fine-grain structural steels | ≤ 0.18 | 11 | | [11503](/materials/csn/11503 "11503") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [11503](/materials/csn/11503 "11503") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [11503](/materials/csn/11503 "11503") | [1.0576](/materials/material-no/1.0576 "1.0576") | Fine-grain structural steels | ≤ 0.22 | 3 | | [11503](/materials/csn/11503 "11503") | [1.0577](/materials/material-no/1.0577 "1.0577") | Unalloyed structural steels | ≤ 0.2 | 11 | | [11523](/materials/csn/11523 "11523") | [1.0547](/materials/material-no/1.0547 "1.0547") | Others | ≤ 0.22 | 4 | | [11523](/materials/csn/11523 "11523") | [1.0553](/materials/material-no/1.0553 "1.0553") | Unalloyed structural steels | ≤ 0.2 | 20 | | [11523](/materials/csn/11523 "11523") | [1.0554](/materials/material-no/1.0554 "1.0554") | Unalloyed structural steels | ≤ 0.2 | 8 | | [11523](/materials/csn/11523 "11523") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [11523](/materials/csn/11523 "11523") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [11529](/materials/csn/11529 "11529") | [1.0585](/materials/material-no/1.0585 "1.0585") | Others | ≤ 0.2 | 1 | | [11529](/materials/csn/11529 "11529") | [1.0585](/materials/material-no/1.0585 "1.0585") | Others | ≤ 0.2 | 1 | | [11529](/materials/csn/11529 "11529") This grade’s own name | — | — | — | — | | [11531](/materials/csn/11531 "11531") | [1.0577](/materials/material-no/1.0577 "1.0577") | Unalloyed structural steels | ≤ 0.2 | 11 | | [11550](/materials/csn/11550 "11550") | [1.0507](/materials/material-no/1.0507 "1.0507") | Others | ≤ 0.2 | 8 | | [11600](/materials/csn/11600 "11600") | [1.0580](/materials/material-no/1.0580 "1.0580") | Unalloyed structural steels | ≤ 0.22 | 10 | | [11600](/materials/csn/11600 "11600") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [11600](/materials/csn/11600 "11600") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [11700](/materials/csn/11700 "11700") | [1.0070](/materials/material-no/1.0070 "1.0070") | Unalloyed structural steels | — | 16 | | [11700](/materials/csn/11700 "11700") | [1.0070](/materials/material-no/1.0070 "1.0070") | Unalloyed structural steels | — | 16 | | [12 020 VAR](/materials/csn/12-020-var "12 020 VAR") | [1.1141](/materials/material-no/1.1141 "1.1141") | Case hardening steels | 0.12–0.18 | 20 | | [12 022](/materials/csn/12022 "12 022") | [1.0408](/materials/material-no/1.0408 "1.0408") | Quenched and tempered steels | ≤ 0.21 | 3 | | [12 042](/materials/csn/12042 "12 042") This grade’s own name | — | — | — | — | | [12 061](/materials/csn/12061 "12 061") | [1.1231](/materials/material-no/1.1231 "1.1231") | Spring steels | 0.65–0.73 | 18 | | [12 061](/materials/csn/12061 "12 061") | [1.1234](/materials/material-no/1.1234 "1.1234") | Others | 0.6–0.75 | 9 | | [12 061](/materials/csn/12061 "12 061") | [1.0603](/materials/material-no/1.0603 "1.0603") | Spring steels | 0.65–0.72 | 10 | | [12 061](/materials/csn/12061 "12 061") | [1.2007](/materials/material-no/1.2007 "1.2007") | Tool steels for cold work | 0.65–0.7 | 8 | | [12 090](/materials/csn/12090 "12 090") | [1.2004](/materials/material-no/1.2004 "1.2004") | Tool steels for cold work | 0.8–0.9 | 8 | | [12 122 Tž](/materials/csn/12-122-tz "12 122 Tž") | [1.5523](/materials/material-no/1.5523 "1.5523") | Others | 0.17–0.24 | 4 | | [12010](/materials/csn/12010 "12010") | [1.0301](/materials/material-no/1.0301 "1.0301") | Case hardening steels | 0.07–0.13 | 20 | | [12010](/materials/csn/12010 "12010") | [1.1121](/materials/material-no/1.1121 "1.1121") | Case hardening steels | 0.07–0.13 | 22 | **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/2 "Previous") Page 3 of 13[Next](/materials/csn/page/4 "Next")