ASTM A513 GR.4140 ERW Pipe has high Strength, high harden ability, good toughness, high temperature creep strength and long-term strength.

ASTM A513 GR.4130 ERW Pipe has high strength and toughness, high harden ability, and strong steel heat. The temperature is lower than 500 ℃, but the strength is lower at 550℃.

ASTM A513 GR.1040 ERW Pipe has high strength and good machine ability, cold deformation of plastic, welding, quenching and tempering can be welded, and heat treatment without temper brittleness.

ASTM A513 GR.1020 ERW Pipe is differ from ordinary ERW Pipe, GR.1020 ERW Pipe is made of steel that from the base metal melt

ASTM A513 GR.1010 ERW Pipe is produced like this: Use hot-rolled coil forming machine to make high-frequency current skin effect and the proximity effect, to make the edge of the heating tube melting