BS970/72 - 015A03 equivalent ? BS970/72 - 015A03 equivalent ? Techcitizen (Mechanical) (OP) 24 Nov 03 22:39 Can anybody suggest the latest equivalent in BS or ASTM for the old BS970/72 - 015A03 low carbon steel ? Will any of the EN grades match this ? RE: BS970/72 - 015A03 equivalent ? atad (Aerospace) 25 Nov 03 09:00 Take a look at this pdf file reference table 8. It appears to show the various equivalents. I think the specification now is BS EN 10083-1 CR22E.www.dstan.mod.uk/data/03/016/00000200.pdf RE: BS970/72 - 015A03 equivalent ? andyenergy (Materials) 25 Nov 03 10:11 There is no equivalent BS 970:1955 EN Grade for BS 970: 1970 015A03. The nearest equivalent is BS970 Pt1 1996 040A04 being equaivalent to the old EN grade 2A or 2A/1 but the specified C and Mn levels are slightly higher. Depends whether this is it is important or not. You coud try asking a stockholder to supply the 040A04 to the compositional limits of the old 015A03, but the Mn will bver be low enough to meet that low of 0.30% max.For info:015A03 was 0.06%C max, 0.30% Mn max.040A04 is 0.08% C max, 0.30 - 0.50% Mn maxEn2A/1 was 0.1%C max, 0.50% Mn maxEn2A was 0.12% C max, 0.50% Mn maxENB 10083-1:1991 is for quenched and tempered steels. CR22E has a specified C of 0.17/0.24% and Mn of 0.40/0.70% (plus maximum Cr+Mn+Ni of 0.63% Max) so it's not really the same. Hope this helpsAndy RE: BS970/72 - 015A03 equivalent ? Techcitizen (Mechanical) (OP) 1 Dec 03 07:01 Thanks atad and Andy.Any DIN matches on this ?