... -B ASTM A53-B API 5L-BAPI 5L, X42, X52, and 5CT ,J55 ,K55SAE1020 ,SAE1045 JIS G4051, S20C ,S45C, JIS G3454 ... rolled .(7) Packing : paint,bundles or for the clients’ needs(8) Application field:Transportation of oil,gas or fluid,Construction,Electricity ... building industy,Chemical industy,Petroleum,Traffic. Standardgradechemical composition(%)CSiMnPSCuNiMoCrDIN 17175ST37ST35.8 0.07~0.140.17~0.370.35~0.65 ...