Hydrogen ASTM A387 Gr.11 CL2 steel plate Cold Embrittlement Experiment

Hydrogen ASTM A387 Gr.11 CL2 generally adopts normalizing + tempering heat treatment process, and the tempering temperature is not lower than 620 °C. Refer to ASTM A387/A387M and GB713-2008 standards. The general requirements for mechanical properties of hydrogen ASTM A387 Gr.11 CL2  are shown in the following table.

General requirements for mechanical properties of hydrogen A387 Gr.11 CL2 steel plate

Hydrogen ASTM A387 Gr.11 CL2 steel plate needs to carry out step cold embrittlement test to evaluate the anti-temper brittleness ability of the hydrogen-producing steel plate. The heating curve of the step cold embrittlement test is shown in Figure 1. The anti-temper embrittlement ability of hydrogen-plated steel sheets is generally evaluated by the method of Figure 2. The hydrogen-containing ASTM A387 Gr.11 CL2 steel sheet should meet the requirements of formula vTr55+2.5ΔvTr55≤10°C, where vTr55 is Min.PWHT (minimum simulated post-weld heat treatment experiment) The ductile-brittle transition temperature (impact power-temperature fitting curve 55J corresponds to the temperature value), ΔvTr55 is the ductile-brittle transition temperature of the steel after the step cold embrittlement experiment and after Min.PWHT
The difference between the ductile-brittle transition temperature of the steel plate (ΔvTr55 = vTr55-vTr55 after step cooling).

Figure 1 ASTM A387 Gr.11 CL2 Heat treatment curve of step cold embrittlement experiment   

Figure 2 ASTM A387 Gr.11 CL2 Anti-temper embrittlement capacity assessment method