S355J2WP Weathering Steel Chemical Composition and Application

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S355J2WP steel plate is a European standard atmospheric corrosion-resistant steel, which belongs to weathering steel plate. It is a low-alloy steel made by adding a certain amount of alloying elements to ordinary steel. The atmospheric corrosion resistance of weathering steel is 2-8 times that of ordinary carbon steel, and it has good mechanical properties, welding properties, etc., and the longer the time, the more obvious the corrosion resistance effect.

1. S355J2WP steel plate grade analysis:

S—symbol S (for structural steel);

355—Description of the specified lower limit yield strength for thickness £ 16mm, expressed in MPa);

J2—the quality name according to the impact energy data;

W—indicates that the steel is improved atmospheric corrosion resistance;

P - if applicable, the letter P is used for the greater phosphorus content classification (only when the steel grade is S355);

2. S355J2WP steel plate implementation standard: EN10025-5:2004 standard.

3. Delivery status of S355J2WP steel plate: delivered in hot rolled, normalized or normalized rolled state.

4. S355J2WP improved atmospheric corrosion resistant steel

A certain amount of alloying elements, such as P, Cu, Cr, Ni, Mo, are added to the steel. In order to increase the resistance to air corrosion, an automatic protective oxide is formed on the base metal under the influence of climatic conditions.

5. Characteristics of S355J2WP weathering steel

S355J2WP weathering steel has a protective rust layer and is resistant to atmospheric corrosion, and can be used to manufacture low-alloy structural steel for steel structures such as vehicles, bridges, towers, and containers. Compared with ordinary carbon steel, weathering steel has better corrosion resistance in the atmosphere. Compared with stainless steel, weathering steel has only a small amount of alloying elements, such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium, etc., the total amount of alloying elements is only a few percent, unlike stainless steel, which reaches 100%. Tens of tenths, so the price is relatively low.

6. Chemical composition of S355J2WP steel plate (melting analysis):