ASTM A355 Grade P11 Alloy steel pipe is the part of ASTM A335, the A355 Grade P11 Alloy steel pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.

DIN 17100 St37 Steel Pipes not intended for heat treatment - apart from stress-relieving heat treatment and normalizing.

GB/T1591 High Strength Low-alloy Steel Pipe grade Q345E owned minimum yield strength at 345Mpa and tensile strength above 470Mpa.When rolling steel plate Q345E,the impacting test shall be done under low temperature at minus 40 centigrade.

API 5CT J55 seamless steel tube/pipe and its coupling adopt the same steel grade. Our product contains the sulfur and phosphorus contents of respectively no more than 0.030%. API 5CT J55 seamless steel tube/pipe can be manufactured both seamless and elect