S420M plates technical requirements

Welded steel pipes are made by crimping steel plates, bending them into a circle, and then welding the joints together. Seamless steel pipe is directly processed by round steel piercing or hot rolling process, so there is no weld on the outer surface. The performance of seamless steel pipe is better than that of welded steel pipe, and the price of seamless steel pipe is also higher. There are some differences in chemical composition between S420M plates, welded steel pipe and seamless steel pipe. The material of welded steel pipe contains the chemical composition suitable for welding.

The mechanical properties of 20MnV steel are as follows: tensile strength 785 MPa, yield strength 590 MPa, elongation after fracture 10%, reduction of area 40%, impact absorption energy 55 J. S420M plates, 20MnV steel has good properties, good strength, toughness and plasticity, good hardenability and machinability. After carburizing, 20MnV steel can be directly quenched without secondary quenching to improve the core structure. The weldability of 20MnV steel is good, but there is temper brittleness at 300-360 ℃ during heat treatment.

No. 45 steel is commonly used medium carbon quenched and tempered structural steel. The cold plasticity of No. 45 steel is generally better than S420M plates. Annealing and normalizing are better than quenching and tempering. No. 45 steel has higher strength and better machinability than Q345 steel. After proper heat treatment, it can obtain certain toughness, plasticity and wear resistance. No. 45 steel S420M plates is suitable for hydrogen welding and argon arc welding, but not suitable for gas welding. Preheating is required before welding, and stress relief annealing shall be conducted after welding.

Welcome customers to visit our company, we specialize in steel products, adhere to the S420M plates quality first standard, and do not forget to provide customers with the best quality products and services. Our product quality office is the best, and our S420M plates price is also very advantageous. Welcome to purchase steel products from our company.

To provide customers with the most satisfactory service and realize the win-win of economic and social benefits, our company promises to provide excellent S420M plates products in this bidding, and in line with the attitude of being serious and responsible to customers, before sending goods to users, the S420M plates technical personnel shall confirm that there is no fault in the equipment before sending goods to users, and then send goods and products to users, and formulate the following service terms.