Analysis of weathering steel SPA-H: Composition, properties and multiple applications

Weathering steel SPA-H composition:

Mainly contains iron (Fe), carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S) and other common elements, but also contains a small amount of copper (Cu), chromium (Cr), nickel (Ni) and other alloying elements. Copper helps to improve the corrosion resistance of steel, and chromium can enhance the stability of the passivation film on the steel surface, so that it can better resist atmospheric corrosion, especially in harsh environments such as humid and salty air.

Properties of weathering steel SPA-H

Weather resistance: It has excellent atmospheric corrosion resistance, long-term exposure to the outdoor environment, no additional coating protection, the surface will gradually form a dense and strong adhesion oxide film, slow down the corrosion rate, reduce maintenance costs. For example, it is used in outdoor Bridges, iron towers, building facades and other structures, which can withstand wind and rain, sun and rain for a long time.

Mechanical properties: has a certain strength and toughness, can withstand the conventional static load, dynamic load, to meet the building structure, mechanical frame and other stress needs, yield strength can usually reach 345MPa or more.

Weathering steel SPA-H application field

Construction industry: used in a large number of walls and roofing materials of industrial plants, like the substrate of color steel plate often uses SPA-H weathering steel, which not only realizes the structural function, but also forms a unique decorative effect due to surface rust, which conforms to the modern industrial wind aesthetic; There are also exposed structural parts of large transportation hub buildings such as stations and airports.

Traffic engineering: Often used in railway vehicles, highway guardrail, bridge main structure or ancillary facilities, to ensure safety and stability at the same time, reduce frequent maintenance and renovation work, save manpower and material resources.

Power facilities: such as transmission towers, long-term service in the field environment, SPA-H weathering steel can rely on its own characteristics against complex climate, to maintain long-term reliable operation of the facility.