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 inother standards
Č 4751	1.2343	Tool steels for hot work	0.33–0.41	20
Č.1220	1.0401	Case hardening steels	0.12–0.18	23
Č.1330	1.0402	Quenched and tempered steels	0.17–0.24	24
Č.1531	1.1191	Quenched and tempered steels	0.42–0.5	21
Č.1730	1.0601	Quenched and tempered steels	0.57–0.65	25
Č.1731	1.1221	Quenched and tempered steels	0.57–0.65	18
Č.4830	1.8159	Quenched and tempered steels	0.47–0.55	27
Č.5431	1.6582	Quenched and tempered steels	0.3–0.38	25
Č.5432	1.6580	Quenched and tempered steels	0.26–0.34	15
Č0361	1.0308	Unalloyed structural steels	≤ 0.17	10
Č0361	1.0038	Unalloyed structural steels	≤ 0.17	26
Č1221	1.1141	Case hardening steels	0.12–0.18	20
Č3840	1.2842	Tool steels for cold work	0.85–0.95	14
Č4150	1.2080	Tool steels for cold work	1.9–2.2	18
Č4650	1.2436	Tool steels for cold work	2–2.3	16
Č4850	1.2379	Tool steels for cold work	1.45–1.6	20
Č6444	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Withdrawn — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.