Global Patent Index - EP 0882808 B1

EP 0882808 B1 20020123 - Steel for big-sized moulds and process for manufacturing the steel

Title (en)

Steel for big-sized moulds and process for manufacturing the steel

Title (de)

Stahl für Formen grosser Abmessungen und Verfahren zu seiner Herstellung

Title (fr)

Acier pour moules de grandes dimensions et procédé de fabrication

Publication

EP 0882808 B1 20020123 (FR)

Application

EP 98401272 A 19980528

Priority

FR 9707138 A 19970604

Abstract (en)

[origin: EP0882808A1] Steel for making large moulds comprises by weight: 1-3% manganese, up to 0.400% silicon, up to 0.015% phosphorous, 1.50-3.5% chromium, 0.25-1% molybdenum, 0.100-0.250% niobium, 100-300 ppm titanium or zirconium if necessary, up to 0.300% copper, up to 0.300% nickel, up to 80ppm nitrogen, up to 80 ppm oxygen, up to 30 ppm calcium, 15-50 ppm boron, 0.10-0.25% carbon, up to 0.0250% sulphur and up to 250 ppm aluminium, the balance being iron and impurities. Also claimed is making this steel by melting in an electric furnace, then degassing under a vacuum below 1, preferably 0.2 torr, in a heated ladle.

IPC 1-7

C22C 38/38

IPC 8 full level

C22C 38/38 (2006.01)

CPC (source: EP)

C22C 38/38 (2013.01)

Designated contracting state (EPC)

AT BE CH DE ES GB IT LI NL PT SE

DOCDB simple family (publication)

EP 0882808 A1 19981209; EP 0882808 B1 20020123; AR 015385 A1 20010502; AT E212385 T1 20020215; AU 6981098 A 19981210; AU 748866 B2 20020613; BR 9814777 A 20001024; CN 1079839 C 20020227; CN 1215762 A 19990505; DE 69803514 D1 20020314; DE 69803514 T2 20020829; ES 2170462 T3 20020801; FR 2764308 A1 19981211; FR 2764308 B1 19990723; HK 1019901 A1 20000303; MY 120154 A 20050930; PT 882808 E 20020731; SG 63849 A1 19990330

DOCDB simple family (application)

EP 98401272 A 19980528; AR P980102636 A 19980604; AT 98401272 T 19980528; AU 6981098 A 19980529; BR 9814777 A 19980528; CN 98103518 A 19980603; DE 69803514 T 19980528; ES 98401272 T 19980528; FR 9707138 A 19970604; HK 99105050 A 19991104; MY PI9802472 A 19980603; PT 98401272 T 19980528; SG 1998001099 A 19980521