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.

Cr-Mo anti-hydrogen steels on hydro-reactor and the cracks in welding metal are introduced in the paper,welding materials selection and the effect of heat input and post welding heat treatment on welding joints are also discussed.