ASME SA709 Grade HPS 100 steel is a high-performance structural steel renowned for its high strength, high toughness, excellent weather resistance, and weldability. It is specifically engineered for structures like bridges that are exposed to harsh environments over extended periods.
High Strength and High Toughness
Yield Strength: ≥690 MPa (100 ksi), with a tensile strength ranging from 760 to 895 MPa, significantly surpassing conventional structural steels.
Low-Temperature Toughness: At -46°C (50°F), the Charpy V-notch impact energy remains ≥25 ft-lb, ensuring safety under extreme climates or impact loads.
Ductility: Elongation ≥18% and reduction in area ≥40%, providing robust plastic deformation capacity.
Excellent Weather Resistance
By incorporating alloying elements such as copper (0.90–1.20%), chromium (0.40–0.65%), and nickel (0.65–0.90%), a dense oxide film forms, significantly enhancing atmospheric corrosion resistance. This extends structural lifespan and reduces maintenance costs.
Superior Weldability
Compared to traditional high-strength steels, HPS 100W reduces susceptibility to welding cracks through optimized chemical composition and heat treatment processes, enabling efficient on-site construction.
