High speed steel bars 2.2mm-160mm,HSS steel,cold drawing ,rolled ,black surface & bright finished surface treatment High speed steel bars 2.2mm-160mm,HSS steel ... ≤0.03≤0.03DescriptionCarbide is thin and even,with high quenching hardness ,good red hardness ,toughness,wearing resistance ... 0.03≤0.03DescriptionCarbide is thin and even,with high quenching hardness,good red hardness,hot hardness and wearing ...