pc steel bar Diameter: 7.1mm,9.0mm,10.7mm,12.6mm JISG3137-1994 , GB/T5223.3-2005 ,KSD ... steel barprestressed concrete steel barNominal diameter: 7.1mm,9.0mm,10.7mm,12.6mmNominal diameter in KS standard : 7.4mm, 9 ... (Korean)Chemical composition of 30MnSi CSiMnPSCu0.27-0.340.60-1.100.90-1.30<0.025<0.025<0.025 PC STEEL BAR