Common corrosion types and causes of SA572 grade 65 carbon steel plate sheet

Heat treatment is a very important process to improve the performance of SA572 grade 65 carbon steel plate sheet etc. metal materials. The process of heating, heat preservation and cooling the steel in solid state to obtain the required structure and properties.

Japan is a typical shipping first, and its raw materials are imported from Oceania, central and South America and other Asian countries. Most of the SA572 grade 65 carbon steel plate sheet steel produced is exported to China and other Asian countries, and a small amount is exported to America. Shipping is the main way of its SA572 grade 65 carbon steel plate sheet steel international transportation. According to the data, steel goods account for about 20% of the total sea freight in Japan. The domestic transportation of Japanese steel is mainly truck.

The main reference for structural design of steel structure engineering is the static and dynamic characteristics of the steel used under various actions, such as elasticity, plasticity, strength, toughness, fatigue and other mechanical properties. Therefore, the SA572 grade 65 carbon steel plate sheet and so on steel used in the construction of steel structure engineering will limit its strength, plasticity, impact toughness and weldability. Steel structure engineering requires high tensile strength and yield point of steel. High yield point can reduce the cross-section of the component, so as to reduce the weight, save steel and reduce the cost. High tensile strength can increase the safety of the structure.

SA572 grade 65 carbon steel plate sheet, Q460 material is a low-alloy high-strength steel. Q stands for the strength of steel. 460 means that plastic deformation occurs only when the strength of the steel reaches 460MPa. That is, when the external force is released, the steel can only maintain the shape of the force and cannot return to its original shape.This strength is greater than that of ordinary steel. Tensile strength is 550-720MPa, elongation: 17%, Q460 material is made by adding Cr, N, V, Ti and other alloying elements on the basis of 16Mn steel.