STN · 184 grades

STN steel grades — 184 designations

Every grade designated under STN, 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

184 designations

Grade	Material no.	Category	C% by weight	Also inother standards
10 000	1.0035	Unalloyed structural steels	—	22
10 004	1.0035	Unalloyed structural steels	—	22
11 109	1.0715	Free cutting steels	≤ 0.14	14
11 110	1.0721	Free cutting steels	0.07–0.13	15
11 120	1.0725	Free cutting steels	0.12–0.18	5
11 140	1.0726	Free cutting steels	0.32–0.39	15
11 301	1.0347	Unalloyed structural steels	≤ 0.1	12
11 305	1.0338	Unalloyed structural steels	≤ 0.08	18
11 321	1.0330	Unalloyed structural steels	≤ 0.12	17
11 343	1.0026	Unalloyed structural steels	≤ 0.2	2
11 368	1.0345	Heat-resistant structural steels	≤ 0.16	18
11 373	1.0036	Unalloyed structural steels	≤ 0.17	20
11 373	1.0036	Unalloyed structural steels	≤ 0.17	19
11 375	1.0038	Unalloyed structural steels	≤ 0.17	26
11 375	1.0039	Unalloyed structural steels	≤ 0.17	3
11 375	1.0120	Unalloyed structural steels	≤ 0.17	1
11 378	1.0114	Unalloyed structural steels	≤ 0.17	21
11 418	1.0425	Heat-resistant structural steels	≤ 0.2	20
11 443	1.0044	Unalloyed structural steels	≤ 0.21	26
11 443	1.0149	Unalloyed structural steels	≤ 0.2	2
11 443	1.0128	Unalloyed structural steels	≤ 0.21	5
11 448	1.0145	Unalloyed structural steels	≤ 0.18	8
11 448	1.0138	Unalloyed structural steels	≤ 0.2	2
11 500	1.0050	Unalloyed structural steels	—	23
11 500	1.0050	Unalloyed structural steels	—	23
11 503	1.0570	Unalloyed structural steels	≤ 0.2	22
11 503	1.0570	Unalloyed structural steels	≤ 0.2	20
11 503	1.0577	Unalloyed structural steels	≤ 0.2	11
11 503	1.0576	Fine-grain structural steels	≤ 0.22	3
11 523	1.0553	Unalloyed structural steels	≤ 0.2	20
11 523	1.0547	Others	≤ 0.22	4
11 523	1.0554	Unalloyed structural steels	≤ 0.2	8
11 600	1.0060	Unalloyed structural steels	—	21
11 600	1.0060	Unalloyed structural steels	—	21
11 700	1.0070	Unalloyed structural steels	—	16
11 700	1.0070	Unalloyed structural steels	—	16
12 010	1.1121	Case hardening steels	0.07–0.13	22
12 020	1.1148	Case hardening steels	0.12–0.18	7
12 023	1.1141	Case hardening steels	0.12–0.18	20
12 024	1.1151	Quenched and tempered steels	0.17–0.24	15
12 024	1.0402	Quenched and tempered steels	0.17–0.24	24
12 030	1.1158	Quenched and tempered steels	0.22–0.29	12
12 030	1.0406	Quenched and tempered steels	0.22–0.29	20
12 031	1.1178	Quenched and tempered steels	0.27–0.34	13
12 031	1.0528	Quenched and tempered steels	0.27–0.34	14
12 040	1.1181	Quenched and tempered steels	0.32–0.39	20
12 040	1.0501	Quenched and tempered steels	0.32–0.39	23
12 041	1.1186	Quenched and tempered steels	0.37–0.44	16
12 041	1.0511	Quenched and tempered steels	0.37–0.44	21
12 042	1.5511	Others	0.32–0.39	3

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.