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P is also the most effective element in Q235NH weathering steel to improve the atmospheric corrosion resistance. Generally, it is not used alone, but combined with Cu, Cr and other elements to achieve better results.
Q235NH weathering steel is mainly used for bridges, vehicles, towers, railways and other steel structures exposed to the atmosphere for a long time. In order to meet market challenges, Q235NH weathering steel was developed according to the product structu
Carbon steel is essentially an Fe-C alloy with a relatively simple chemical composition and contains a very small amount of elements such as Si, Mn, S and P. Weathering steel is a low-alloy steel that obtains better corrosion resistance than carbon steel
In recent years, ASTM A588 Grade C weathering steel has been paid attention to and has been popularized and applied. Since Cu has an obvious effect on improving the atmospheric corrosion resistance of ASTM A588 Grade C weathering steel, Cu is added to gen
ASTM A588 Grade C steel containing copper often suffers from electrical cracking problems during the production process. Cracks in copper-containing ASTM A588 Grade C steel sheets are commonly observed during high-temperature heating and rolling of the bi
ASTM A242 Type1 steel is widely used in railway, construction, bridge and other fields. Its alloy composition contains a small amount of copper, brocade, Ming and other elements, and a dense protective film will be formed on the surface during use to prev
When the A588GrA steel is heated at a higher heating temperature than the Q235B steel, the temperature of the soaking section is 1240 ~ 1260 ℃, and the slab descaling effect is better at this time. The air-fuel ratio is controlled between 0.5 and 0.7, whi
When the ASTM A588GrA steel slab is heated at high temperature, the copper oxide remaining in the heating furnace is reduced to free copper at high temperature, and the molten copper atoms expand along the grain boundaries of the slab structure, weakening
The key to the atmospheric corrosion resistance of ASTM A 709 Gr.50W weathering steel is the protective rust layer on the outside of the steel matrix, whose physical and chemical properties determine the resistance to atmospheric corrosion.
The chemical composition and mechanical properties of the hot-rolled thick Q345qDNH weathering steel sheet meet the requirements of GB/T 714-2015. C. The content of S. P is low and the crack sensitivity coefficient is small, which is beneficial to improve