... advanced technology 3.mass stock ductile cast iron seamless steel pipesTechnique: seamless Finish: cold drawn and hot rolled ManufacturerHenan Xinfengyi Enterprise Co., ... , C-Mn and Alloy Seamless Steel PipeProcessSeamless, Cold drawn and Hot rolledMaterial20#, 10#, 45#, 35# and Q23516Mn, 27SiMn, 40Cr, 12CrMo, ... , Henan Province, 450000, ChinaProduct:Process flow:Warehouse: K10 Ductile Cast Iron Pipe