G550 z275g construction high-strength galvanized steel sheets

High strength steel sheet steel contains only a small amount of alloying elements, not high strength but good plasticity, cold bending, welding and corrosion resistance. Mainly used in building structures, industrial plants, low pressure boilers, low and medium pressure chemical containers, oil tanks, pipelines, cranes, tractors, vehicles and general engineering structures with low strength requirements.

Grade Q345, Q390 steel: good comprehensive mechanical properties, welding properties, hot and cold processing properties and corrosion resistance, C, D, E steel has good low temperature toughness. It is mainly used for welding structures of ships, boilers, pressure vessels, oil storage tanks, Bridges, power plants, lifting and transporting machinery and other high load parts.

Q420 steel: high strength, especially in normalizing or normalizing and tempering state has high comprehensive mechanical properties. Mainly used for large ships, Bridges, power plant equipment, medium and high pressure boilers, high pressure vessels, rolling stock, lifting machinery, mining machinery and other large welding structures.

Grade Q460 steel: the highest strength, in normalizing, normalizing and tempering or rate fire and tempering state has very high comprehensive mechanical properties, all with aluminum supplement deoxidation, quality grade C, D, E, can ensure the good toughness of the spare steel. Used for various large engineering structures and light structures requiring high strength and large load.