EP 0882808 A1 19981209 - Manufacturing process for steels, suitable for big-sized moulds
Title (en)
Manufacturing process for steels, suitable for big-sized moulds
Title (de)
Verfahren zur Herstellung eines Stahles für Formen grosser Abmessungen
Title (fr)
Procédé de fabrication d'un acier pour moules de grandes dimensions
Publication
Application
Priority
FR 9707138 A 19970604
Abstract (en)
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
IPC 8 full level
C22C 38/38 (2006.01)
CPC (source: EP)
C22C 38/38 (2013.01)
Citation (search report)
- [A] EP 0431557 A1 19910612 - DAIDO STEEL CO LTD [JP]
- [A] EP 0648853 A1 19950419 - NIPPON STEEL CORP [JP]
- [A] EP 0508237 A1 19921014 - BETHLEHEM STEEL CORP [US]
- [A] FR 2000542 A1 19690912 - NIPPON KOKAN KK
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