... from customers and products qualification rate over 99%. 2,we were certificated to ISO9001:2000 and passed the authentication of ... "Classification Society". 5,we usualy use material of steel type of 15#,20#,25 ... 42CrMo,20Cr2Ni4,5CrNiMo,15CrNiMo,20CrNiMo,35CrMo,40CrNiMo,etc.7,regularly,we accept processing on giving materials. 8,according to practical situation and ...