cast steel gear rim  for building materials parts  is made of  ZG310-570,our company is a professional manufacturer.It is the 20th in cast steel field in China .MOQ is 1 ton per piece .It have full exported experence which is exported to Germany/Korea/india,etc.It is exported to Germany 1000tons per year.

It is examined by NDT,such as ultrasonic inspection ,magnetic particle examination and penetrant inspection.