... , ISO11960, JISG3444, JISG3454 etc.Grade10#-45#, 16Mn, A53-A369, API J55-API P110, ST35-ST52, Q195-Q345, 20#, 16Mn, A53(A ... , B), API J55, API K55, API N80, API L80, API P110, St37, GR ... , L320M, L360M, L390M, L415M, L450M, L485M, L555M, L625M, L690M, H40, J55, K55, M65, L80, C95, N80, C90, T95, P110, ,Q125, S235GT ...