Experimental results show that the value of threshold stress intensity factor K_ ISCC of Cr-Mo-V steel is rather low and increases slowly with the rise of tempering temperature when tempered at lower temperature and the fracture mode is mainly intergranular fracture.

Determination of heated band width criterion of local postweld heat treatment for Cr-Mo steel pipe;

This technology test presentation is about procedure test of weld joint property of Cr-Mo steel through normalizing heat treatment, including the tensile strength and impact toughness under low temperature.

Cr-Mo steel exposed to hydrogen gas at 400℃, 20MPa for 105 h were checked for making tensile test, fracture and fatigue test in order to investigate the effect of hydrogen attack on mechanical properties of Cr-Mo steel.

The hardness variation and precipitation behavior of the Mo steel and Nb-Mo steel during aging at 525 ℃ after relaxation in hot deformation were studied by using the thermo-simulation test,hardness measurement and TEM.