Patent ID: 6200527
Filing Date: 2001-03-13
Classification: C22B,C22C,Y02P,Y10T

Abstract:
A carbon or low-alloy steel, comprising;a carbon content of less than 1.5% by weight,alloy elements in a combined amount of less than 9% by weight,oxide and sulfide inclusions,wherein the chemical composition of the steel comprises, by weight:0.1%.ltoreq.Mn.ltoreq.5%0.01%.ltoreq.Al.ltoreq.0.05%0.025%.ltoreq.S.ltoreq.0.3%0.002%.ltoreq.Ca.ltoreq.0.1%O.ltoreq.0.0015%wherein a ""DO oxide"" cleanness index is below 30, the oxide inclusions are lime aluminates, and an average calcium content of type 2, type 3, type 4 and type 5 inclusions is less than 30% of the inclusions.