astm a 106 grade b carbon steel pipe 10#, 20#, 45#, 16Mn, Q235, Q345, Q195 ... .:1.8-100mm or more precision astm a 106 grade b carbon steel pipe1) Material: 10#, 20#, 45#, 16Mn, Q235, Q345 ... /hot roll/cold rollAbove are the general items, for the special types, we can also meet your needs. low price astm ...