EN steel grade S355J2 material plate big mills

The basic phases of EN steel grade S355J2 material, structural steel in the annealed state are ferrite and carbide. The alloy elements are dissolved in ferrite to form alloy ferrite, which depends on solid solution strengthening to increase strength and hardness, but at the same time reduce plasticity and toughness. The addition of alloying elements reduces the carbon content of the eutectoid point, which increases the proportion of pearlite in the structure and reduces the distance of the pearlite layer. This also increases the strength of the steel and reduces the plasticity.

Although Q345E steel plate has stronger torsion resistance and better corrosion resistance than ordinary steel plate, there are still some environments that can cause corrosion to Q345E steel plate. The following environment should be avoided as far as possible to avoid corrosion of EN steel grade S355J2 material, Q345E steel plate. 1. Acid water. 2. Salt water. 3. Nitric acid. 4. Atmospheric erosion. Atmospheric erosion for Q345E steel plate corrosion is reflected in the chloride and pollutant pollution source of Q345E steel plate corrosion, this corrosion is very serious.

On November 9, 2020, the World Trade Organization (WTO) Safeguards Committee issued the Safeguards Investigation Circular submitted to it by the South African delegation on November 6, 2020. South Africa’s International Trade Management Committee makes decisions on the import of steel structure products including U, I, H, L and T Sections of Iron or Non-alloy Steel (U, I, H, L and T Sections of Iron or Non-alloy Steel). The safeguard measure is a negative preliminary ruling, and it is recommended to terminate the safeguard measure investigation in this case and not implement the safeguard measure.