Types : S780/SS2.5 S660/SS2.0 S550/SS1.7 S460/SS1.4 S390/SS1.2 S330/SS1.0 S280/SS0.8 S230/SS0.6 S170/SS0.5 S110/SS0.3 The Major Technological Index: Chemical Composition: C 0.70~1.20% Mn 0.35~1.20% Si≥0.40% S≤0.05% P ≤ ...Read More