--- title: "SRPS steel grades — 178 designations — Page 2" 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/2 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/srps/page/2.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: sha256:0a3aaf5ab56539289332b8f61bbd5efc279bfc90bc5e489a74c52f82c0f4e0be 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/2 > Canonical URL: https://steelequivalents.com/materials/srps/page/2 > 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 2 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.4145](/materials/srps/c-4145 "Č.4145") | [1.2067](/materials/material-no/1.2067 "1.2067") | Tool steels for cold work | 0.95–1.1 | 21 | | [Č.4150](/materials/srps/c-4150 "Č.4150") | [1.2080](/materials/material-no/1.2080 "1.2080") | Tool steels for cold work | 1.9–2.2 | 18 | | [Č.4170](/materials/srps/c-4170 "Č.4170") | [1.4000](/materials/material-no/1.4000 "1.4000") | Stainless steels | ≤ 0.08 | 16 | | [Č.4170.1](/materials/srps/c-4170-1 "Č.4170.1") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [Č.4171](/materials/srps/c-4171 "Č.4171") | [1.4024](/materials/material-no/1.4024 "1.4024") | Stainless steels | 0.12–0.17 | 13 | | [Č.4172](/materials/srps/c-4172 "Č.4172") | [1.4021](/materials/material-no/1.4021 "1.4021") | Stainless steels | 0.16–0.25 | 18 | | [Č.4173](/materials/srps/c-4173 "Č.4173") | [1.4028](/materials/material-no/1.4028 "1.4028") | Stainless steels | 0.26–0.35 | 18 | | [Č.4174](/materials/srps/c-4174 "Č.4174") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [Č.4175](/materials/srps/c-4175 "Č.4175") | [1.2083](/materials/material-no/1.2083 "1.2083") | Tool steels for cold work | 0.36–0.42 | 16 | | [Č.4175](/materials/srps/c-4175 "Č.4175") | [1.4034](/materials/material-no/1.4034 "1.4034") | Stainless steels | 0.43–0.5 | 18 | | [Č.4180](/materials/srps/c-4180 "Č.4180") | [1.7037](/materials/material-no/1.7037 "1.7037") | Quenched and tempered steels | 0.3–0.37 | 8 | | [Č.4181](/materials/srps/c-4181 "Č.4181") | [1.7039](/materials/material-no/1.7039 "1.7039") | Quenched and tempered steels | 0.38–0.45 | 13 | | [Č.4184](/materials/srps/c-4184 "Č.4184") | [1.7038](/materials/material-no/1.7038 "1.7038") | Quenched and tempered steels | 0.34–0.41 | 7 | | [Č.4230](/materials/srps/c-4230 "Č.4230") | [1.7103](/materials/material-no/1.7103 "1.7103") | Spring steels | 0.62–0.72 | 1 | | [Č.4231](/materials/srps/c-4231 "Č.4231") | [1.2101](/materials/material-no/1.2101 "1.2101") | Tool steels for cold work | 0.58–0.66 | 5 | | [Č.4320](/materials/srps/c-4320 "Č.4320") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [Č.4321](/materials/srps/c-4321 "Č.4321") | [1.7147](/materials/material-no/1.7147 "1.7147") | Case hardening steels | 0.17–0.22 | 15 | | [Č.4332](/materials/srps/c-4332 "Č.4332") | [1.7176](/materials/material-no/1.7176 "1.7176") | Spring steels | 0.52–0.59 | 18 | | [Č.4381](/materials/srps/c-4381 "Č.4381") | [1.7139](/materials/material-no/1.7139 "1.7139") | Case hardening steels | 0.14–0.19 | 11 | | [Č.4382](/materials/srps/c-4382 "Č.4382") | [1.7149](/materials/material-no/1.7149 "1.7149") | Case hardening steels | 0.17–0.22 | 8 | | [Č.4520](/materials/srps/c-4520 "Č.4520") | [1.6587](/materials/material-no/1.6587 "1.6587") | Case hardening steels | 0.15–0.21 | 15 | | [Č.4531](/materials/srps/c-4531 "Č.4531") | [1.8550](/materials/material-no/1.8550 "1.8550") | Nitriding steels | 0.3–0.37 | 3 | | [Č.4570](/materials/srps/c-4570 "Č.4570") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [Č.4570.4](/materials/srps/c-4570-4 "Č.4570.4") | [1.4435](/materials/material-no/1.4435 "1.4435") | Stainless steels | ≤ 0.03 | 20 | | [Č.4571](/materials/srps/c-4571 "Č.4571") | [1.4310](/materials/material-no/1.4310 "1.4310") | Stainless steels | 0.05–0.15 | 18 | | [Č.4571.1](/materials/srps/c-4571-1 "Č.4571.1") | [1.4873](/materials/material-no/1.4873 "1.4873") | Valve steels | 0.4–0.5 | 11 | | [Č.4572](/materials/srps/c-4572 "Č.4572") | [1.4541](/materials/material-no/1.4541 "1.4541") | Stainless steels | ≤ 0.08 | 25 | | [Č.4573](/materials/srps/c-4573 "Č.4573") | [1.4401](/materials/material-no/1.4401 "1.4401") | Stainless steels | ≤ 0.07 | 20 | | [Č.4574](/materials/srps/c-4574 "Č.4574") | [1.4571](/materials/material-no/1.4571 "1.4571") | Stainless steels | ≤ 0.08 | 18 | | [Č.4575](/materials/srps/c-4575 "Č.4575") | [1.2731](/materials/material-no/1.2731 "1.2731") | Tool steels for hot work | 0.45–0.55 | 2 | | [Č.4577](/materials/srps/c-4577 "Č.4577") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant steels | ≤ 0.2 | 20 | | [Č.4578](/materials/srps/c-4578 "Č.4578") | [1.4841](/materials/material-no/1.4841 "1.4841") | Heat resistant steels | ≤ 0.2 | 17 | | [Č.4580](/materials/srps/c-4580 "Č.4580") | [1.4301](/materials/material-no/1.4301 "1.4301") | Stainless steels | ≤ 0.07 | 23 | | [Č.4582](/materials/srps/c-4582 "Č.4582") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [Č.4583](/materials/srps/c-4583 "Č.4583") | [1.4580](/materials/material-no/1.4580 "1.4580") | Stainless steels | ≤ 0.08 | 8 | | [Č.4583](/materials/srps/c-4583 "Č.4583") | [1.4580](/materials/material-no/1.4580 "1.4580") | Others | ≤ 0.08 | 8 | | [Č.4586](/materials/srps/c-4586 "Č.4586") | [1.4821](/materials/material-no/1.4821 "1.4821") | Heat resistant steels | 0.1–0.2 | 3 | | [Č.4590](/materials/srps/c-4590 "Č.4590") | [1.4305](/materials/material-no/1.4305 "1.4305") | Stainless steels | ≤ 0.1 | 17 | | [Č.4650](/materials/srps/c-4650 "Č.4650") | [1.2436](/materials/material-no/1.2436 "1.2436") | Tool steels for cold work | 2–2.3 | 16 | | [Č.4720](/materials/srps/c-4720 "Č.4720") | [1.7262](/materials/material-no/1.7262 "1.7262") | Case hardening steels | 0.13–0.17 | 18 | | [Č.4721](/materials/srps/c-4721 "Č.4721") | [1.7264](/materials/material-no/1.7264 "1.7264") | Case hardening steels | 0.18–0.23 | 4 | | [Č.4730](/materials/srps/c-4730 "Č.4730") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [Č.4730.4](/materials/srps/c-4730-4 "Č.4730.4") | [1.8519](/materials/material-no/1.8519 "1.8519") | Nitriding steels | 0.27–0.34 | 5 | | [Č.4731](/materials/srps/c-4731 "Č.4731") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [Č.4732](/materials/srps/c-4732 "Č.4732") | [1.7225](/materials/material-no/1.7225 "1.7225") | Quenched and tempered steels | 0.38–0.45 | 25 | | [Č.4733](/materials/srps/c-4733 "Č.4733") | [1.7228](/materials/material-no/1.7228 "1.7228") | Quenched and tempered steels | 0.46–0.54 | 12 | | [Č.4734](/materials/srps/c-4734 "Č.4734") | [1.7707](/materials/material-no/1.7707 "1.7707") | Quenched and tempered steels | 0.26–0.34 | 8 | | [Č.4738](/materials/srps/c-4738 "Č.4738") | [1.8515](/materials/material-no/1.8515 "1.8515") | Nitriding steels | 0.28–0.35 | 8 | | [Č.4739](/materials/srps/c-4739 "Č.4739") | [1.8507](/materials/material-no/1.8507 "1.8507") | Nitriding steels | 0.3–0.37 | 8 | | [Č.4740](/materials/srps/c-4740 "Č.4740") | [1.2304](/materials/material-no/1.2304 "1.2304") | Tool steels for cold work | 0.8–0.9 | 1 | **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 "Previous") Page 2 of 4[Next](/materials/srps/page/3 "Next")