What do JIS SM490YA plates mean

Our JIS SM490YA plates, hot rolled mild steel sheets offer excellent corrosion resistance property in the server's environments. The mild steel sheets provide high resistance to nitric and chloride corrosion in sulfide solutions. These SA283 GrC carbon stel plates offer high strength, tensile, yield, mechanical strength, ductility, hardness, toughness, etc. Mild steel sheet is worked very easily in a high-temperature application and show excellent resistance to chloride crossing and cracking stress.

The addition of Ca element in steel such as JIS SM490YA plates can refine grain size, partly desulphurize and change the composition, quantity and morphology of non-metallic inclusions. It is similar to that of adding rare earth in steel. It can improve the corrosion resistance, wear resistance, high temperature and low temperature resistance of steel, improve the impact toughness, fatigue strength, plasticity and welding performance of the steel, and increase the cold heading, shock resistance, hardness and contact endurance strength of the steel.

The company formulates appropriate JIS SM490YA plates product internal control components, strictly controls the fluctuation range of chemical components, and ensures the stability of steel plate performance. Strengthen batching control and smelting operations, effectively control the content of harmful elements such as Sn, Sb, As, Cu, and reduce the content of P and S to improve the purity of steel, reduce the tendency of temper embrittlement, and improve the high temperature corrosion resistance of steel. It adopts controlled heating to ensure heating time and temperature, and measures such as controlled rolling to ensure the inherent quality of the steel plate.

ational Bureau of Statistics: The production of raw coal increased rapidly compared with the same period, and the daily average decreased slightly from the previous month. From January to February, the production of raw coal was 620 million tons, an increase of 25.0% year-on-year, an increase of 17.1% over January-February 2019, and an average increase of 8.2% in two years; the average daily output was 10.47 million tons, a decrease of 880,000 tons from December of the previous year.