BS · 1,547 grades

BS steel grades — 1547 designations — Page 22

Every grade designated under BS, 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

1547 designations

Grade	Material no.	Category	C% by weight	Also inother standards
C25 C25E C25R	1.1139	Quenched and tempered steels	0.24–0.29	6
C25 C25E C25R	1.1158	Quenched and tempered steels	0.22–0.29	12
C25 C25E C25R	1.1163	Quenched and tempered steels	0.22–0.29	6
C25 C25E C25R	1.9415	Quenched and tempered steels	0.22–0.28	6
C25E	1.0406	Quenched and tempered steels	0.22–0.29	20
C30 C30E C30R	1.0528	Quenched and tempered steels	0.27–0.34	14
C30 C30E C30R	1.0530	Others	0.3–0.35	7
C30 C30E C30R	1.1143	Quenched and tempered steels	0.3–0.34	7
C30 C30E C30R	1.1178	Quenched and tempered steels	0.27–0.34	13
C30 C30E C30R	1.1179	Quenched and tempered steels	0.27–0.34	8
C30 C30E C30R	1.9416	Quenched and tempered steels	0.28–0.34	7
C35	1.0501	Quenched and tempered steels	0.32–0.39	23
C35E	1.0501	Quenched and tempered steels	0.32–0.39	23
C40	1.0511	Quenched and tempered steels	0.37–0.44	21
C40E	1.0511	Quenched and tempered steels	0.37–0.44	21
C45	1.0912	Others	0.42–0.5	11
C45	1.0503	Quenched and tempered steels	0.42–0.5	24
C45 C45E C45R	—	—	—	3
C45E	1.0503	Quenched and tempered steels	0.42–0.5	24
C45E	1.0912	Others	0.42–0.5	11
C50 C50E C50R	1.0540	Quenched and tempered steels	0.47–0.55	13
C50 C50E C50R	1.0586	Steels for surface hardening	0.48–0.53	7
C50 C50E C50R	1.1206	Quenched and tempered steels	0.47–0.55	17
C50 C50E C50R	1.1213	Steels for surface hardening	0.5–0.57	11
C50 C50E C50R	1.1241	Steels for surface hardening	0.47–0.55	8
C50 C50E C50R	1.9505	Steels for surface hardening	0.48–0.55	6
C50E	1.0535	Quenched and tempered steels	0.52–0.6	21
C55	1.0535	Quenched and tempered steels	0.52–0.6	21
C55E	1.0535	Quenched and tempered steels	0.52–0.6	21
C60	1.0601	Quenched and tempered steels	0.57–0.65	25
C60 C60E C60R	1.1212	Others	0.56–0.6	5
C60 C60E C60R	1.1228	Others	0.58–0.62	5
C60 C60E C60R	—	—	—	3
C60E	1.0601	Quenched and tempered steels	0.57–0.65	25
CDS7	1.0507	Others	≤ 0.2	8
CEW1	1.0033	Unalloyed structural steels	≤ 0.11	3
CEW2	1.0034	Unalloyed structural steels	≤ 0.15	12
CEW2BK	1.0028	Unalloyed structural steels	≤ 0.15	18
CEW4	1.0308	Unalloyed structural steels	≤ 0.17	10
CEW4	1.0044	Unalloyed structural steels	≤ 0.21	26
CEW4	1.0225	Unalloyed structural steels	≤ 0.21	2
CEW5	1.0580	Unalloyed structural steels	≤ 0.22	10
CEW5	1.0570	Unalloyed structural steels	≤ 0.2	22
CEW5	1.0570	Unalloyed structural steels	≤ 0.2	20
CFS10	1.7218	Quenched and tempered steels	0.22–0.29	25
CFS11	1.7225	Quenched and tempered steels	0.38–0.45	25
CFS3	1.0301	Case hardening steels	0.07–0.13	20
CFS3A	1.0212	Unalloyed structural steels	≤ 0.1	3
CFS4	1.0308	Unalloyed structural steels	≤ 0.17	10
CFS5	1.0580	Unalloyed structural steels	≤ 0.22	10

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.