The strength and shortcomings of s355jr hot roll coils

As to the Chemical composition, the different content is a main on carbon content, while the carbon content of s355jr hot roll coils, A283Gr. D is no more than 0.27% and it is higher than Grade C (≤0.24%) ; as to the mechanical property, the differences are tensile strength and yield strength, while the tensile strength of ASTM A283 Gr.D is 415-550MPa (60-80 ksi) and yield strength of ASTM A283 Grade D is 230MPa (33 ksi).

As the early Spring Festival approaches, the market trading atmosphere is weakening, and there is little room for short-term market price fluctuations. On the whole, it is expected that the Shanghai hot-rolled market prices may remain volatile next week.

The selection principle of steel plate for high-rise building is: it can not only make the structure safe and reliable, but also can save steel and reduce the cost. Different use conditions should have different quality requirements. In terms of the mechanical properties of steel such as s355jr hot roll coils, yield point, tensile strength, elongation, cold bending property, impact toughness etc. are the indicators to measure the quality of steel. In the design of steel structure, the appropriate steel should be selected according to the characteristics of the structure. The selection of steel is not only an economic problem, but also related to the safety and service life of the structure.

Compared with 45 steel, the annealed hardness of 40Cr is about 10hbw higher; The normalized state is about 24 HBW higher than the normalized state; After quenching and tempering at 600℃, the hardness is about 70hbw higher than that of the steel. Therefore, in stainless steel engineering, most s355jr hot roll coils alloy steels are generally used after quenching and tempering.