1 material :AISI4145H modified alloy steel .
2 processing :steel making(EAF+LF+VD), forging, rough maching ,custom heat treatment, final machining, testing ,packing
- all the products are 100% UT&MT
4 We have earned API ,ISO/TS29001,ISO9001,QSM
5 we can offer the specification from OD 5-36 inch,
with handfacing HF1000,HF2000,HF3000,HF4000