We have gradually formed four advantageous products of steel plate, steel pipe, ASTM A36 carbon steel, stainless steel and special steel, and established our own processing center to meet the diversified needs of customers. At the same time, we also set up professional environmental protection, baby carriage and other projects. With the professional team and strong background of steel plate, steel pipe, stainless steel and special steel, it will drive the rapid development of other projects.
Composition of low alloy steel plate: Low carbon: due to the high requirements for toughness, weldability and cold formability of low alloy steel plate, the carbon content is not more than 0.20%; manganese is added; the auxiliary elements such as niobium, titanium or vanadium are added; a small amount of niobium, titanium or vanadium forms fine carbide or carbonitride in the steel, which is conducive to obtaining fine ferrite grains and improving the strength and toughness of low alloy steel plate; in addition, The corrosion resistance of ASTM A36 carbon steel, low alloy steel plate can be improved by adding a small amount of copper (＜0.4%) and phosphorus (about 0.1%).
Phosphorus element (P element) is brought into steel by ore. Generally speaking, phosphorus is also harmful element. Although phosphorus can increase the strength and hardness of ASTM A36 carbon steel etc. steel, it also causes the decrease of plasticity and impact toughness. Especially at low temperature, it makes steel significantly brittle, which is called "cold brittleness". The higher the phosphorus content is, the greater the cold brittleness is. Therefore, the phosphorus content in ASTM A36 carbon steel etc. steel is strictly controlled.
"Steel plate blanking and cutting operation process: 1. During automatic cutting ASTM A36 carbon steel, the distance between the two ends of the steel plate and the guide rail should be within 5 after the steel plate is placed on the platform. 2. If it is semi-automatic cutting, the guide rail should be placed on the plane of the steel plate, and then put on the cutting machine. 3. The side with the cutting torch should face the operator. The cutting nozzle should be selected according to the thickness of the steel plate, and the cutting straightness and speed should be adjusted. "
