A514 GrQ steel plate material characteristics

A514 GrQ plate is a quenched and tempered high-strength weldable steel plate under ASTM specifications. It is mainly used in places that require high tensile strength and high yield strength. A514 GrQ or A514 GrQ modified steel is generally used for lifting gears of engineering cars and racks for marine channels. Depending on the thickness, its hardness is between 235-290, the yield is greater than 630MPa, and the tensile strength is above 700MPa.

Weldability test of A514 GrQ steel plate:
It can be seen from the material analysis that ASTM A514 GrQ steel has a high sensitivity to cold cracking. In order to obtain good weld quality, it should be controlled from two aspects: (1) control the hardness value of HAZ; (2) control the residual hydrogen content.

A514 GrQ steel plate is classified as a high yield strength, quenched and tempered alloy steel with high yield strength and tensile strength, excellent notch resistance and corrosion resistance. Under the premise of meeting the strength requirements and not increasing the C content, A514 GrQ steel can improve its hardenability and temper softening resistance by adding Cr, Mo, V, Cu and other elements in an appropriate amount. Through chemical composition analysis and simulation experiments, it was found that A514 GrQ steel simply showed cracks or decreased resistance during welding.