Shandong Qirui Machinery Co., Ltd.

The strength of 2 318" drillpipe is based on materias and heat reatment process, API 5DP grades commonly used in the industiry, such as E75, X95,andG10, achieve high tensile strength and corrosion resistance by controling the carbon content (0.25-0.35%o), manganese (1.0-1.8%o), and the proportionof elements such as Cr and Mo. With noralizing or normalzing +tempering heat treatment, the microstructure s uniform and the toughess is greatlyimproved.