The final heat treatment of A213 T91 alloy steel is normalizing + tempering: Normalizing temperature of 1040 ℃, holding time of not less than 10 min; Tempering temperature of 730 ~ 780 ℃, holding time of not less than 1h. After the final heat treatment, t

Q345B is a kind of steel pipe material. Q represents the yield strength of the material，the following 345 refers to the yield value of this material. GB/T1591 Q345B steel is low carbon alloy steel, which own good overall performance, good low temperature

42CrMo4 steel is the United States AISI standard 4140 steel improved varieties. DIN 1.7225 / 42CrMo4 Steel is a common Chromium-Molybdenum alloy steel with quenched and tempered heat treatment.

A335 Grade P12 Alloy steel Seamless Welded pipe , in addition to carbon, also contains substantial amounts of elements like nickel, tungsten, molybdenum, chromium, silicon, manganese, vanadium and small quantities of a few commonly used elements such as s