HG785D steel plate for high-strength welded structure

HG785D steel plate belongs to high-strength welded structural steel. The meaning of HG785D grade: "H" is the capital letter of the Chinese pinyin of "welding"; "G" is the capital letter of the high-strength "high" in Chinese pinyin; 785 refers to the tensile strength of the steel plate is about 785Mpa, and D refers to the quality grade of the steel. The common steel plate quality grades are A, B, C, D, E. The impact of grade D steel plate is -20℃. HG785D steel plate has high yield strength and tensile strength.

Delivery status of HG785D steel plate: quenched and tempered.

HG785D steel plate is a new type of low-alloy high-strength steel with high strength, low expansion coefficient and stable modulus of elasticity. It is an ideal material for manufacturing ships, super-strength steel shells, pressure vessels and other high-strength products.

HG785 steel contains a certain amount of alloying elements and microalloying elements. Its weldability is different from that of carbon steel. The main reason is that the changes in the structure and performance of the welding heat-affected zone are more sensitive to the welding heat input. The heat-affected zone has an increased tendency to harden, a laminar tearing tendency, and a risk of reheating cracks.