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S355J0WP railway special steel

S355J0WP railway special steel

EN 10025-5:2004 S355J0WP is a railway special steel, which is a low-alloy steel made by adding a certain amount of alloying elements to ordinary steel. After adding phosphorus, copper, chromium, nickel and other trace elements to S355J0WP steel, a dense and highly adherent protective film is formed on the surface of the steel, which hinders the spread and development of rust and protects the substrate under the rust layer to slow down its corrosion rate. The amorphous spinel-type oxide layer with a thickness of about 50μm-100μm formed between the rust layer and the base is dense and has good adhesion to the base metal. Due to the existence of this dense oxide film, it prevents oxygen and The penetration of water into the steel matrix slows down the deep development of rust to steel materials and greatly improves the atmoSPHEric corrosion resistance of steel materials.
 
S355J0WP weathering steel is a steel series that can be used for thinning, bare use, or simplified coating, so as to extend the life of products, save labor and reduce consumption, and upgrade. It is also a steel series that can be integrated into modern metallurgical new mechanisms, new technologies, and new processes. Its continuous development and innovative steel series.
 

S355J0WP grade analysis:

S—Symbol S (for structural steel);
355—Thickness £ 16mm Specification of the lower limit yield strength, expressed in MPa);
J0—Quality name based on impact energy data;
W-indicates that the steel is improved atmospheric corrosion resistance;
P—If applicable, the letter P is used for the larger phosphorus content classification (only when the steel grade is S355);
"+N or +AR"—When the product is specified and delivered under the condition of +N or +AR. The sign "+N or +AR" will be added to the steel name and steel number. Example: When the lower limit yield strength is 355MPa and the lower limit of impact energy at 0℃ is 27J (J0) and standard rolling delivery conditions, the improved atmospheric corrosion resistance (W) structural steel (S): steel EN 10025-5-S355J0W+N (or +AR); or steel EN10025-5-1.8959+N (or +AR).
 
S355J0WP weathering steel is mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, towers, photovoltaics, and high-speed projects. It can also be used to manufacture structural parts such as containers, railway vehicles, oil derricks, harbor construction, oil production platforms, and containers containing hydrogen sulfide corrosive medium in chemical and petroleum equipment.

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