Why is SPA-H weathering steel more durable

Because SPA-H weathering steel has the characteristics of easy extension, high strength and fatigue resistance of ordinary steel, and its corrosion resistance is 2-8 times of that of ordinary steel.

SPA-H weathering steel, also known as atmospheric corrosion-resistant steel, is a low-alloy steel between ordinary steel and stainless steel. It is made of ordinary carbon steel with a certain amount of copper and corrosion-resistant elements such as phosphorus, chromium, nickel, titanium and vanadium. SPA-H weathering steel not only has the characteristics of easy extension, high strength and fatigue resistance of ordinary steel, but also can reach 2-8 times of ordinary carbon steel in corrosion resistance.

Due to its excellent properties, SPA-H weathering steel is expensive. Compared with ordinary steel, the price of SPA-H weathering steel is about 60% higher.
Only containers, railway vehicles, oil derricks, drilling platforms and other structures with harsh service environment and high requirements on steel corrosion resistance can use SPA-H weathering steel.