... ...ASTM A53 A106 A179...JIS G3429 JIS 3445...DIN 1630 DIN 17175...API 5CT OCTG seriesCasing:K55 M65 N80- ... TTSt35V, 26CrMo4,11MnNi53, 13MnNi63, 10Ni14,12Ni19, X8Ni19DIN 17175 St35.8, St45.8, 17Mn4, 19Mn5,15Mo3, 13CrMo910, 10CrMo910,14MoV63, X20CrMoV121DIN 17176 ... EStE420,StE460, WStE460, TStE460, EStE460DIN 28180 St37.0, St35.8, TTSt35N,15Mo3, 13CrMo4 4JIS Steel Pipes StandardStandard GradeJIS G3429 ...