Four types of steel
We all know whether it is a building or a vehicle or a tool for everyday use. Most have steel components in it. Therefore, steel is everywhere in our daily lives. Different steels are also in different places. So the steel is also divided into 4 types. I stands for the first class steel: it belongs to carbon steel. Its carbon content is less than 1.35% (0.1%~1.2%), except for iron, carbon and limited impurities such as silicon, manganese, phosphorus and sulfur. Steel without other alloying elements. The performance of carbon steel depends mainly on the carbon content. As the carbon content increases, the strength and hardness of the steel increase, while the ductility, toughness, and weldability decrease. Compared with other steels, carbon steel is the earliest use, low cost, wide performance range and maximum dosage. It is suitable for water, steam, air, hydrogen, ammonia, nitrogen and petroleum products with nominal pressure PN≤32.0MPa and temperature -30~425°C. The first clas...