What is the S355J2 S355J2W S355J2WP curtain wall steel surface test

We have very professional workshops for thin plates/ coils, S355J2 S355J2W S355J2WP curtain wall steel, medium and general thick plates. And also special workshop to produce thick plates that thickness is more than 300mm. we produce the steel plate include carbon and low alloy high strength steel plate, shipbuilding and offshore platform steel plate, boiler and pressure vessel steel plate, weather resistant steel plate, pipeline steel plate, alloy steel plate, automobile structure steel plate, and gas cylinder steel coil etc.

Weathering steel plate refers to the low alloy structural steel with protective rust layer and atmospheric corrosion resistance, which can be used to manufacture steel structures such as vehicles, bridges, towers, containers, etc. Compared with S355J2 S355J2W S355J2WP curtain wall steel, ordinary carbon steel, weathering steel has better corrosion resistance in the atmosphere. Compared with stainless steel, weathering steel has only a small amount of alloy elements, such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium and so on. The total amount of alloy elements only accounts for a few percent, instead of more than 10 percent as stainless steel, so the weathering steel price is relatively low.

Vanadium mainly exists in the form of carbide in S355J2 S355J2W S355J2WP curtain wall steel and so on steel. Its main function is to refine the structure and grain size of steel and reduce the strength and toughness of steel. When the solid solution is dissolved at high temperature, the hardenability is increased; conversely, if it is in the form of carbide, the hardenability is reduced. Vanadium increases the tempering stability of quenched steel and produces secondary hardening effect. The vanadium content in steel, except high speed tool steel, is generally less than 0.5%.

Perhaps this S355J2 S355J2W S355J2WP curtain wall steel explains why Trump has warmed to the idea of constructing a border wall on the U.S. border with Mexico out of steel rather than concrete. In an interview with NPR, Tom Gibson, president and CEO of the American Iron and Steel Institute estimated that the barrier would require a hefty order of S355J2 S355J2W S355J2WP curtain wall steel 3 million tons of steel.