The surface quality of xar400 plate equivalent grades shall meet the requirements

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Q690D material is a Chinese standard high-strength welded structural steel. What does Q690D stand for? Q represents the yield strength, 690 represents the yield strength value, and D represents the quality of the Q690 steel. The quality grades are A, B, C, D, and E, respectively. The impact of Grade D steel plate is﹣20°C. Q690D executive standard: GB / T1591-2008. xar400 plate equivalent grades, Q690D steel has high yield strength and tensile strength.

The location weld of xar400 plate equivalent grades, wear-resistant steel plate is only allowed to be welded on the base metal surface with the electric welding rod for welding the base metal; in the welding of the base course, the base weld shall be strictly prevented from melting to the transition layer or even the multiple layer weld of stainless steel, so as to prevent a small amount of high chromium and high nickel surfacing wear-resistant steel plate components diluted into the carbon steel weld to form martensite structure and harden.

sa514 gr.Q structural steel alloy element composition%C: 0.14-0.21, Si: 0.15-0.35, Mn: 0.95-1.30, P max.: 0.035, S max.: 0.035, Ni: 1.20-1.50, Cr: 1.00-1.50, Mo: 0.45-0.6.0, V: 0.03-0.08The mechanical properties in thickness (mm)T≤65Yield strength (≥Mpa): 690Tensile strength (Mpa):760-895Elongation in ≥,%: 18

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