ČSN · 647 grades

ČSN steel grades — 647 designations — Page 7

Every grade designated under ČSN, 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. Unless marked, every name here is an indicative cross-reference, not an asserted identity — the grades are close, not interchangeable. 2 of 50 rows differ and carry a “This grade’s own name” mark.

Also known as

647 designations

Grade	Material no.	Category	C% by weight	Also inother standards
15323	1.7766	Hydrogen resistant steels	0.15–0.2	1
15330	1.8519	Nitriding steels	0.27–0.34	5
15330	1.7707	Quenched and tempered steels	0.26–0.34	8
15340	1.8509	Nitriding steels	0.38–0.45	16
15341	1.7225	Quenched and tempered steels	0.38–0.45	25
15423	1.7779	Hydrogen resistant steels	0.17–0.23	1
15432ŠN	1.7361	Quenched and tempered steels	0.28–0.35	7
15432ŠN	1.8515	Nitriding steels	0.28–0.35	8
16 121	1.5714	Case hardening steels	0.13–0.19	6
16 121	1.5715	Case hardening steels	0.13–0.19	7
16 125 PH	1.6523	Case hardening steels	0.17–0.23	18
16 444	1.6582	Quenched and tempered steels	0.3–0.38	25
16 520 This grade’s own name	—	—	—	—
16 XXX NN	1.6511	Quenched and tempered steels	0.32–0.4	18
16 XXX NN	1.5864	Quenched and tempered steels	0.3–0.4	2
16125	1.6523	Case hardening steels	0.17–0.23	18
16125PH	1.3536	Bearing steels	0.93–1.05	2
16220	1.5919	Case hardening steels	0.12–0.18	11
16220	1.5713	Others	0.1–0.17	3
16223PH	—	—	0.09–0.16	1
16224	1.8928	High-strength steels	≤ 0.2	7
16231	1.5920	Case hardening steels	0.15–0.2	6
16240	1.5815	Others	0.3–0.37	5
16240	1.5710	Quenched and tempered steels	0.32–0.4	14
16321	1.5919	Case hardening steels	0.12–0.18	11
16321 PH	1.5919	Case hardening steels	0.12–0.18	11
16326	1.6587	Case hardening steels	0.15–0.21	15
16326PH	1.6587	Case hardening steels	0.15–0.21	15
16329VN	1.5637	Low-temperature structural steels	≤ 0.15	11
16341	1.6563	Others	0.38–0.44	4
16341	1.6511	Quenched and tempered steels	0.32–0.4	18
16342	1.6582	Quenched and tempered steels	0.3–0.38	25
16342	1.6511	Quenched and tempered steels	0.32–0.4	18
16343	1.6582	Quenched and tempered steels	0.3–0.38	25
16343	1.6511	Quenched and tempered steels	0.32–0.4	18
16420	1.5752	Case hardening steels	0.14–0.2	15
16420	1.5752	Case hardening steels	0.14–0.2	15
16420	1.2735	Tool steels for cold work	0.1–0.17	2
16420	1.5732	Case hardening steels	0.1–0.17	13
16430VN	1.6580	Quenched and tempered steels	0.26–0.34	15
16430ŽH	1.6580	Quenched and tempered steels	0.26–0.34	15
16431	1.6931	Others	0.22–0.32	1
16435	1.6580	Quenched and tempered steels	0.26–0.34	15
16440	1.5755	Quenched and tempered steels	0.27–0.35	9
16440	1.6582	Quenched and tempered steels	0.3–0.38	25
16520 This grade’s own name	—	—	—	—
16523	1.5860	Case hardening steels	0.1–0.17	3
16527VN	1.5680	Low-temperature structural steels	≤ 0.15	4
16640	1.5864	Quenched and tempered steels	0.3–0.4	2
16720	1.6657	Special steels for aviation and aerospace	0.11–0.17	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.