ASTM A 709 Gr.50W Weather-resistant steel sheet concept

ASTM A709 Gr.50W Weathering steel sheet is a low-alloy high-strength structural steel sheet developed according to ASTM (American Society for Materials and Testing) standard A709. Among them, "50" means that its minimum tensile strength is 50 ksi (about 345 MPa), while "W" means that the steel has good weather resistance.

ASTM A 709 Gr.50W Weather-resistant steel plate Characteristics

Good weather resistance: the surface of the steel plate can form a dense rust layer, effectively prevent further internal corrosion, especially suitable for Marine environment and harsh weather conditions of structural engineering.

High strength and low alloy: As a low-alloy high-strength structural steel plate, it has high strength and toughness, and can meet the requirements of material strength, toughness and durability in Bridges, buildings and other structural engineering.

Optimized alloying element ratio: by controlling the content of carbon, sulfur, phosphorus and other harmful elements, the welding crack sensitivity of the steel plate is reduced, and the quality of the welding joint is improved.

ASTM A 709 Gr.50W steel plate chemical composition includes carbon, silicon, manganese, phosphorus, sulfur and other elements, the specific content is as follows:

Carbon (C) : ≤0.2%

Silicon (Si) : between 0.15 and 0.35

Manganese (Mn) : between 1.6 and 2.0

Phosphorus (P) : ≤0.035%

Sulfur (S) : ≤0.035%

ASTM A 709 Gr.50W steel sheet is usually delivered in a normalizing or normalizing tempered condition. This treatment is helpful to improve the mechanical properties and corrosion resistance of the steel plate.

ASTM A 709 Gr.50W steel plate has high strength and toughness, its tensile yield strength is not less than 50 ksi (about 345 MPa). At the same time, it also has good fatigue resistance and a certain low temperature toughness.

ASTM A 709 Gr.50W Weathering steel plate is mainly used in Bridges, buildings and other structural engineering, especially in the Marine environment and harsh weather conditions of the structural engineering has a wide range of applications. It can provide a long service life and excellent corrosion resistance, is one of the important materials in structural engineering.