... UT center and less than 2 complaint cases . 2, material of steel type of 15#,20#,25#,30#.35#,40 ... requirements.3,main material are 5CrMnMo,40Cr,42CrMo,20Cr2Ni4,5CrNiMo,15CrNiMo,20CrNiMo,35CrMo,40CrNiMo,etc.4, accept processing on giving materials ... . 5, excellent heat treatment. Axial used for Machine