--- title: "HRN steel grades — 17 designations" description: "Steel grades designated under HRN, with chemical composition, mechanical properties and equivalents in other standards. 17 designations across 17…" canonical: https://steelequivalents.com/materials/hrn language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/hrn.md cs: https://steelequivalents.com/cs/materiály/hrn.md de: https://steelequivalents.com/de/werkstoffe/hrn.md es: https://steelequivalents.com/es/materiales/hrn.md fr: https://steelequivalents.com/fr/matériaux/hrn.md hu: https://steelequivalents.com/hu/anyagok/hrn.md it: https://steelequivalents.com/it/materiali/hrn.md nl: https://steelequivalents.com/nl/materialen/hrn.md pl: https://steelequivalents.com/pl/materiały/hrn.md pt: https://steelequivalents.com/pt/materiais/hrn.md ru: https://steelequivalents.com/ru/материалы/hrn.md tr: https://steelequivalents.com/tr/malzemeler/hrn.md zh: https://steelequivalents.com/zh/材料/hrn.md ja: https://steelequivalents.com/ja/材料/hrn.md ar: https://steelequivalents.com/ar/المواد/hrn.md ko: https://steelequivalents.com/ko/재료/hrn.md pt-br: https://steelequivalents.com/pt-br/materiais/hrn.md hi: https://steelequivalents.com/hi/सामग्री/hrn.md content_hash: sha256:b08ba6a4ef0d0733b8acab536f9ccc052dcdcc10a7793f20a345bd280dcaf4ee 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/hrn > Canonical URL: https://steelequivalents.com/materials/hrn > 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. HRN · 17 grades # HRN steel grades — 17 designations Every grade designated under HRN, 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. Every name on this page is an indicative cross-reference, not an asserted identity: the grades are close, not interchangeable. Check the composition before you substitute. ## Also known as 17 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [Č 4751](/materials/srps/c-4751 "Č 4751") | [1.2343](/materials/material-no/1.2343 "1.2343") | Tool steels for hot work | 0.33–0.41 | 20 | | [Č.1220](/materials/srps/c-1220 "Č.1220") | [1.0401](/materials/material-no/1.0401 "1.0401") | Case hardening steels | 0.12–0.18 | 23 | | [Č.1330](/materials/srps/c-1330 "Č.1330") | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | | [Č.1531](/materials/hrn/c-1531 "Č.1531") | [1.1191](/materials/material-no/1.1191 "1.1191") | Quenched and tempered steels | 0.42–0.5 | 21 | | [Č.1730](/materials/srps/c-1730 "Č.1730") | [1.0601](/materials/material-no/1.0601 "1.0601") | Quenched and tempered steels | 0.57–0.65 | 25 | | [Č.1731](/materials/hrn/c-1731 "Č.1731") | [1.1221](/materials/material-no/1.1221 "1.1221") | Quenched and tempered steels | 0.57–0.65 | 18 | | [Č.4830](/materials/srps/c-4830 "Č.4830") | [1.8159](/materials/material-no/1.8159 "1.8159") | Quenched and tempered steels | 0.47–0.55 | 27 | | [Č.5431](/materials/srps/c-5431 "Č.5431") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [Č.5432](/materials/srps/c-5432 "Č.5432") | [1.6580](/materials/material-no/1.6580 "1.6580") | Quenched and tempered steels | 0.26–0.34 | 15 | | [Č0361](/materials/srps/c-0361 "Č0361") | [1.0308](/materials/material-no/1.0308 "1.0308") | Unalloyed structural steels | ≤ 0.17 | 10 | | [Č0361](/materials/srps/c-0361 "Č0361") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [Č1221](/materials/hrn/c1221 "Č1221") | [1.1141](/materials/material-no/1.1141 "1.1141") | Case hardening steels | 0.12–0.18 | 20 | | [Č3840](/materials/hrn/c3840 "Č3840") | [1.2842](/materials/material-no/1.2842 "1.2842") | Tool steels for cold work | 0.85–0.95 | 14 | | [Č4150](/materials/srps/c-4150 "Č4150") | [1.2080](/materials/material-no/1.2080 "1.2080") | Tool steels for cold work | 1.9–2.2 | 18 | | [Č4650](/materials/srps/c-4650 "Č4650") | [1.2436](/materials/material-no/1.2436 "1.2436") | Tool steels for cold work | 2–2.3 | 16 | | [Č4850](/materials/srps/c-4850 "Č4850") | [1.2379](/materials/material-no/1.2379 "1.2379") | Tool steels for cold work | 1.45–1.6 | 20 | | [Č6444](/materials/srps/c-6444 "Č6444") | [1.2550](/materials/material-no/1.2550 "1.2550") | Tool steels for cold work | 0.55–0.65 | 15 | **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.