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 inother standards
Č.4145	1.2067	Tool steels for cold work	0.95–1.1	21
Č.4150	1.2080	Tool steels for cold work	1.9–2.2	18
Č.4170	1.4000	Stainless steels	≤ 0.08	16
Č.4170.1	1.4006	Stainless steels	0.08–0.15	26
Č.4171	1.4024	Stainless steels	0.12–0.17	13
Č.4172	1.4021	Stainless steels	0.16–0.25	18
Č.4173	1.4028	Stainless steels	0.26–0.35	18
Č.4174	1.4016	Stainless steels	≤ 0.08	18
Č.4175	1.2083	Tool steels for cold work	0.36–0.42	16
Č.4175	1.4034	Stainless steels	0.43–0.5	18
Č.4180	1.7037	Quenched and tempered steels	0.3–0.37	8
Č.4181	1.7039	Quenched and tempered steels	0.38–0.45	13
Č.4184	1.7038	Quenched and tempered steels	0.34–0.41	7
Č.4230	1.7103	Spring steels	0.62–0.72	1
Č.4231	1.2101	Tool steels for cold work	0.58–0.66	5
Č.4320	1.7131	Case hardening steels	0.14–0.19	24
Č.4321	1.7147	Case hardening steels	0.17–0.22	15
Č.4332	1.7176	Spring steels	0.52–0.59	18
Č.4381	1.7139	Case hardening steels	0.14–0.19	11
Č.4382	1.7149	Case hardening steels	0.17–0.22	8
Č.4520	1.6587	Case hardening steels	0.15–0.21	15
Č.4531	1.8550	Nitriding steels	0.3–0.37	3
Č.4570	1.4057	Stainless steels	0.12–0.22	17
Č.4570.4	1.4435	Stainless steels	≤ 0.03	20
Č.4571	1.4310	Stainless steels	0.05–0.15	18
Č.4571.1	1.4873	Valve steels	0.4–0.5	11
Č.4572	1.4541	Stainless steels	≤ 0.08	25
Č.4573	1.4401	Stainless steels	≤ 0.07	20
Č.4574	1.4571	Stainless steels	≤ 0.08	18
Č.4575	1.2731	Tool steels for hot work	0.45–0.55	2
Č.4577	1.4828	Heat resistant steels	≤ 0.2	20
Č.4578	1.4841	Heat resistant steels	≤ 0.2	17
Č.4580	1.4301	Stainless steels	≤ 0.07	23
Č.4582	1.4550	Stainless steels	≤ 0.08	15
Č.4583	1.4580	Stainless steels	≤ 0.08	8
Č.4583	1.4580	Others	≤ 0.08	8
Č.4586	1.4821	Heat resistant steels	0.1–0.2	3
Č.4590	1.4305	Stainless steels	≤ 0.1	17
Č.4650	1.2436	Tool steels for cold work	2–2.3	16
Č.4720	1.7262	Case hardening steels	0.13–0.17	18
Č.4721	1.7264	Case hardening steels	0.18–0.23	4
Č.4730	1.7218	Quenched and tempered steels	0.22–0.29	25
Č.4730.4	1.8519	Nitriding steels	0.27–0.34	5
Č.4731	1.7220	Quenched and tempered steels	0.3–0.37	24
Č.4732	1.7225	Quenched and tempered steels	0.38–0.45	25
Č.4733	1.7228	Quenched and tempered steels	0.46–0.54	12
Č.4734	1.7707	Quenched and tempered steels	0.26–0.34	8
Č.4738	1.8515	Nitriding steels	0.28–0.35	8
Č.4739	1.8507	Nitriding steels	0.3–0.37	8
Č.4740	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.