What material is weathering steel plate

Weathering steel refers to atmospheric corrosion-resistant steel, which is a low-alloy steel material between ordinary steel and stainless steel. It is made by adding a little copper, nickel and other corrosion-resistant elements to ordinary carbon steel. The weathering steel plate has the characteristics of toughness, plasticity, abrasion, high temperature and fatigue resistance. The weather resistance can reach 2-8 times that of ordinary carbon steel, and It has the advantages of rust resistance, corrosion resistance and life extension of components, labor saving and energy saving.

Commonly used weathering steel grades we have:
CORTEN: Corten A, Corten B
ASTM A588/A588M: A588 Grade A, A588 Grade B
ASME SA588/SA588M: SA588 Grade A, SA588 Grade B
EN 10025-5:S355J0WP，S355J2WP，S355J0W，S355J2W
EN 10155: S355J0WP，S355J2WP，S355J0W
TB/T 1979: 09CuPCrNi-A, 05CuPCrNi
GB/T 4171: Q355GNH, Q235NH, Q295NH, Q355NH
JIS G3125: SPA-H, SPA-C
A242/A242M: A242 Type 1, A242 Type 2

What are the characteristics of weathering steel plate:
Compared with ordinary carbon steel, weathering steel has better corrosion resistance in the atmosphere. Compared with ordinary stainless steel, weathering steel is rich in trace alloying elements, such as phosphorus, copper, nickel, vanadium, titanium, etc., alloying elements The total amount is only a few percent of the total content, while stainless steel can reach more than ten percent.

Weathering steel is often used in riveted and welded structural parts for vehicles, containers, buildings and other structures. When used as welded structural parts, the thickness of the steel is less than 16 mm. The welding performance of weathering steel for welded structure is better than that of high weathering structural steel, and it is used for welded structural parts of bridges and buildings.

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