(19)

(11)

EP 0 268 632 A1

(12)

(43) Date of publication: 01.06.1988 Bulletin 1988/22 (21) Application number: 87903375.0 (22) Date of filing: 27.05.1987

(51) International Patent Classification (IPC):  B22D 1/ 00( . ) C21C 1/ 10( . ) B22D 41/ 42( . ) (86) International application number: PCT/GB1987/000362 (87) International publication number: WO 1987/007306 (03.12.1987 Gazette 1987/27)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 29.05.1986 GB 19860013106 (71) Applicant: British Steel Corporation London SE1 7SN (GB)	(72) Inventors: STAMP, David, William Cleveland (GB) KENNEDY, James Bothwell, Lanarkshire (GB) (74) Representative: Heath, Peter William Murray  FRY, HEATH & CO. Seloduct House Station Road Redhill Surrey RH1 1PD Redhill Surrey RH1 1PD (GB)