What is the S420NL carbon steel plate sheet with hot rolled

Normalizing is to heat the steel parts to 30~80℃above the critical temperature for a period of time. Then the parts are taken out of the furnace and cooled in air. Since the cooling rate of normalizing is faster than that of annealing, the strength and hardness of normalized S420NL carbon steel plate sheet are higher than that of annealed S420NL carbon steel plate sheet, but the elimination of internal stress is not as good as annealing. The normalizing operation of S420NL carbon steel plate sheet is simple, the cost is low, the productivity is high, and it is widely used in actual production.

S420NL carbon steel plate sheet discount steel plate and sheet (size mm) supply: 10*2200*12000, 18*2000*000, 14*2000*12000, 22*2500*1000, 12*2000*11000, 16*2500*10000, 14*2000*11000, 25*2000*10000, 12*2000*12000, 14*2500*10000, 14*2000*10000, 20*2500*10000, 12*1800*10000, 16*2200*000, 14*2000*9000, 22*2200*1000, 12*1800*9000, 16*2000*10,000, 16*1800*10000, 14*1800*9000, 20*2000*10000, 22*2200*10000, 30*2500*10000.

Low-alloy steel plates have low carbon content, and because ferrosilicon is not used for deoxidation, the silicon content in steel is often ＜0.07%. The outer layer of rimmed steel is crystallized in a rimmed state, so the surface layer is pure and dense, the surface quality is good, and the Zhengzhou low alloy steel plate S420NL carbon steel plate sheet has good processing performance. Rimmed steel does not have large concentrated shrinkage cavities, uses less deoxidizer, and the cost of steel is low.

After 1975, our equipment includes blast furnaces, electric furnaces, vacuum refining furnaces, and electroslag furnaces. The product varieties are relatively complete. Plates, S420NL carbon steel plate sheet tubes, wires, belts, and profiles have a certain scale, including magnetic, elastic, expanded, bimetal and other precision alloy materials for national defense and electronics industries. In 1982, these plants produced 364,000 tons of S420NL carbon steel plate sheet steel and 542,000 tons of steel.