We are the Special Agent for Hydraulic Support Prop and Machining Purposes of PANGGANG GROUP CHENGDU IRON&STEEL CO., LTD(PGG CSST). There are many customers uses our Hydraulic Support Prop and Machining Purposes, We know many foreign Coal Mining Machinery industries uses 25CrMo4(DIN standard) seamless steel tube. While, almost all coal mining machinery industries uses 27SiMn(GB/T17396-1998)in China. One of our customers is ZHENGZHOU COAL MINING MACHINERY(GROUP) CO., LTD.

Of course, 27SiMn(GB/T17396-1998) superior in the purchase cost. 27SiMn(GB/T17396-1998) was developed by PGG CSST and ZHENGZHOU COAL MINING MACHINERY(GROUP) CO., LTD., together in the seventies of the 20th century, and China Coal Mining Machinery uses it from then on.

If you have some especial request, please let us know your specific requirements. It will be a great pleasure to receive your requirements and establish win-win relationship between us.