ASME SA179 carbon steel tube main feature: could bear high compressure and impact ,good surface and great price. ASME SA179 carbon steel tubeOD:6-89mm;W/T: 0.5-17mm;Standard: ASME SA210,SA213, SA192;SA179Material : 20G,20MnG,25MnG,15MoG,20MoG,12CrMoG,15CrMoGT23, T22,T12,T11 ,T5,T2,210A,210B,210C;