--- title: "SRPS steel grades — 178 designations — Page 3" description: "Steel grades designated under SRPS, with chemical composition, mechanical properties and equivalents in other standards. 178 designations across 178…" canonical: https://steelequivalents.com/materials/srps/page/3 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/srps/page/3.md cs: https://steelequivalents.com/cs/materiály/srps.md de: https://steelequivalents.com/de/werkstoffe/srps.md es: https://steelequivalents.com/es/materiales/srps.md fr: https://steelequivalents.com/fr/matériaux/srps.md hu: https://steelequivalents.com/hu/anyagok/srps.md it: https://steelequivalents.com/it/materiali/srps.md nl: https://steelequivalents.com/nl/materialen/srps.md pl: https://steelequivalents.com/pl/materiały/srps.md pt: https://steelequivalents.com/pt/materiais/srps.md ru: https://steelequivalents.com/ru/материалы/srps.md tr: https://steelequivalents.com/tr/malzemeler/srps.md zh: https://steelequivalents.com/zh/材料/srps.md ja: https://steelequivalents.com/ja/材料/srps.md ar: https://steelequivalents.com/ar/المواد/srps.md ko: https://steelequivalents.com/ko/재료/srps.md pt-br: https://steelequivalents.com/pt-br/materiais/srps.md hi: https://steelequivalents.com/hi/सामग्री/srps.md content_hash: sha256:804e4704fd7e29a59d44db30842048dfa38a9cd4f21cd84d27550140059a0862 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/srps/page/3 > Canonical URL: https://steelequivalents.com/materials/srps/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. SRPS · 178 grades # SRPS steel grades — 178 designations — Page 3 Every grade designated under SRPS, 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 178 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [Č.4740](/materials/srps/c-4740 "Č.4740") | [1.2327](/materials/material-no/1.2327 "1.2327") | Tool steels for cold work | 0.83–0.9 | 2 | | [Č.4742](/materials/srps/c-4742 "Č.4742") | [1.2312](/materials/material-no/1.2312 "1.2312") | Tool steels for cold work | 0.35–0.45 | 5 | | [Č.4750](/materials/srps/c-4750 "Č.4750") | [1.2601](/materials/material-no/1.2601 "1.2601") | Tool steels for cold work | 1.55–1.75 | 15 | | [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.4752](/materials/srps/c-4752 "Č.4752") | [1.2606](/materials/material-no/1.2606 "1.2606") | Tool steels for hot work | 0.32–0.4 | 8 | | [Č.4753](/materials/srps/c-4753 "Č.4753") | [1.2344](/materials/material-no/1.2344 "1.2344") | Tool steels for hot work | 0.35–0.42 | 20 | | [Č.4755](/materials/srps/c-4755 "Č.4755") | [1.2631](/materials/material-no/1.2631 "1.2631") | Tool steels for cold work | 0.45–0.55 | 2 | | [Č.4756](/materials/srps/c-4756 "Č.4756") | [1.2363](/materials/material-no/1.2363 "1.2363") | Tool steels for cold work | 0.95–1.05 | 16 | | [Č.4757](/materials/srps/c-4757 "Č.4757") | [1.2345](/materials/material-no/1.2345 "1.2345") | Tool steels for hot work | 0.48–0.53 | 3 | | [Č.4770](/materials/srps/c-4770 "Č.4770") | [1.4116](/materials/material-no/1.4116 "1.4116") | Stainless steels | 0.45–0.55 | 6 | | [Č.4770.1](/materials/srps/c-4770-1 "Č.4770.1") | [1.4105](/materials/material-no/1.4105 "1.4105") | Stainless steels | ≤ 0.08 | 10 | | [Č.4782](/materials/srps/c-4782 "Č.4782") | [1.7227](/materials/material-no/1.7227 "1.7227") | Quenched and tempered steels | 0.38–0.45 | 15 | | [Č.4783](/materials/srps/c-4783 "Č.4783") | [1.7226](/materials/material-no/1.7226 "1.7226") | Others | 0.3–0.37 | 9 | | [Č.4784](/materials/srps/c-4784 "Č.4784") | [1.8509](/materials/material-no/1.8509 "1.8509") | Nitriding steels | 0.38–0.45 | 16 | | [Č.4790](/materials/srps/c-4790 "Č.4790") | [1.4104](/materials/material-no/1.4104 "1.4104") | Stainless steels | 0.1–0.17 | 13 | | [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.4831](/materials/srps/c-4831 "Č.4831") | [1.8161](/materials/material-no/1.8161 "1.8161") | Quenched and tempered steels | 0.55–0.62 | 4 | | [Č.4835](/materials/srps/c-4835 "Č.4835") | [1.2208](/materials/material-no/1.2208 "1.2208") | Tool steels for cold work | 0.28–0.35 | 4 | | [Č.4840](/materials/srps/c-4840 "Č.4840") | [1.2063](/materials/material-no/1.2063 "1.2063") | Tool steels for cold work | 1.4–1.6 | 4 | | [Č.4844](/materials/srps/c-4844 "Č.4844") | [1.2235](/materials/material-no/1.2235 "1.2235") | Tool steels for cold work | 0.75–0.85 | 13 | | [Č.4850](/materials/srps/c-4850 "Č.4850") | [1.2379](/materials/material-no/1.2379 "1.2379") | Tool steels for cold work | 1.45–1.6 | 20 | | [Č.4851](/materials/srps/c-4851 "Č.4851") | [1.2376](/materials/material-no/1.2376 "1.2376") | Tool steels for cold work | 0.92–1 | 1 | | [Č.4870](/materials/srps/c-4870 "Č.4870") | [1.4871](/materials/material-no/1.4871 "1.4871") | Valve steels | 0.48–0.58 | 17 | | [Č.4970](/materials/srps/c-4970 "Č.4970") | [1.4762](/materials/material-no/1.4762 "1.4762") | Heat resistant steels | ≤ 0.12 | 12 | | [Č.4970.1](/materials/srps/c-4970-1 "Č.4970.1") | [1.4510](/materials/material-no/1.4510 "1.4510") | Stainless steels | ≤ 0.05 | 14 | | [Č.4972](/materials/srps/c-4972 "Č.4972") | [1.4724](/materials/material-no/1.4724 "1.4724") | Heat resistant steels | ≤ 0.12 | 15 | | [Č.4973](/materials/srps/c-4973 "Č.4973") | [1.4742](/materials/material-no/1.4742 "1.4742") | Heat resistant steels | ≤ 0.12 | 17 | | [Č.4974](/materials/srps/c-4974 "Č.4974") | [1.4713](/materials/material-no/1.4713 "1.4713") | Heat resistant steels | ≤ 0.12 | 7 | | [Č.5120](/materials/srps/c-5120 "Č.5120") | [1.5622](/materials/material-no/1.5622 "1.5622") | Low-temperature structural steels | ≤ 0.18 | 6 | | [Č.5160](/materials/srps/c-5160 "Č.5160") | [1.3912](/materials/material-no/1.3912 "1.3912") | Controlled-expansion nickel-iron alloys | — | 4 | | [Č.5161](/materials/srps/c-5161 "Č.5161") | [1.3917](/materials/material-no/1.3917 "1.3917") | Controlled-expansion nickel-iron alloys | ≤ 0.05 | 4 | | [Č.5420](/materials/srps/c-5420 "Č.5420") | [1.5919](/materials/material-no/1.5919 "1.5919") | Case hardening steels | 0.12–0.18 | 11 | | [Č.5421](/materials/srps/c-5421 "Č.5421") | [1.5920](/materials/material-no/1.5920 "1.5920") | Case hardening steels | 0.15–0.2 | 6 | | [Č.5425](/materials/srps/c-5425 "Č.5425") | [1.5732](/materials/material-no/1.5732 "1.5732") | Case hardening steels | 0.1–0.17 | 13 | | [Č.5426](/materials/srps/c-5426 "Č.5426") | [1.5752](/materials/material-no/1.5752 "1.5752") | Case hardening steels | 0.14–0.2 | 15 | | [Č.5426](/materials/srps/c-5426 "Č.5426") | [1.5752](/materials/material-no/1.5752 "1.5752") | Case hardening steels | 0.14–0.2 | 15 | | [Č.5427](/materials/srps/c-5427 "Č.5427") | [1.5860](/materials/material-no/1.5860 "1.5860") | Case hardening steels | 0.1–0.17 | 3 | | [Č.5430](/materials/srps/c-5430 "Č.5430") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | | [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 | | [Č.5434](/materials/srps/c-5434 "Č.5434") | [1.5710](/materials/material-no/1.5710 "1.5710") | Quenched and tempered steels | 0.32–0.4 | 14 | | [Č.5436](/materials/srps/c-5436 "Č.5436") | [1.5736](/materials/material-no/1.5736 "1.5736") | Quenched and tempered steels | 0.32–0.4 | 3 | | [Č.5438](/materials/srps/c-5438 "Č.5438") | [1.5755](/materials/material-no/1.5755 "1.5755") | Quenched and tempered steels | 0.27–0.35 | 9 | | [Č.5439](/materials/srps/c-5439 "Č.5439") | [1.5864](/materials/material-no/1.5864 "1.5864") | Quenched and tempered steels | 0.3–0.4 | 2 | | [Č.5480](/materials/srps/c-5480 "Č.5480") | [1.6957](/materials/material-no/1.6957 "1.6957") | Quenched and tempered steels | 0.22–0.32 | 1 | | [Č.5741](/materials/srps/c-5741 "Č.5741") | [1.2713](/materials/material-no/1.2713 "1.2713") | Tool steels for cold work | 0.5–0.6 | 12 | | [Č.5742](/materials/srps/c-5742 "Č.5742") | [1.2714](/materials/material-no/1.2714 "1.2714") | Tool steels for hot work | 0.5–0.6 | 15 | | [Č.5743](/materials/srps/c-5743 "Č.5743") | [1.2726](/materials/material-no/1.2726 "1.2726") | Tool steels for hot work | 0.22–0.3 | 2 | | [Č.6440](/materials/srps/c-6440 "Č.6440") | [1.2419](/materials/material-no/1.2419 "1.2419") | Tool steels for cold work | 1–1.1 | 16 | | [Č.6441](/materials/srps/c-6441 "Č.6441") | [1.2519](/materials/material-no/1.2519 "1.2519") | Tool steels for cold work | 1.05–1.15 | 2 | **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/srps/page/2 "Previous") Page 3 of 4[Next](/materials/srps/page/4 "Next")