What is the A514 grade B steel material process flow

EN10025-2 S355JR low alloy steel grade is equivalent to GB Q345B in Chinese standard. For the normal thickness, these two steel grades are both owned 345MPa yield strength. Plate S355JR+N indicates that the S355JR steel plate must be done Normalized heat treatment when rolling for improve the steel strength and weldability. Our mill would roll A514 grade B steel material, S355JR alloy steel plate under as rolled or control rolled when customers' have not requested any heat treatment in their P/O.

Plate products A514 grade B steel material order online: 14*2150*9300, 14*2400*10000, 14*2400*9900, 16*2100*10650, 16*2150*10000, 16*2150*10250, 16*2150*10350, 16*2150*10400, 16*2150*10450, 16*2150*10750, 16*2150*10950, 20*1950*9000, 20*1950*9150, 20*1950*9350, 20*1950*9550, 20*1950*9700, 20*1950*9750, 20*2100*10700, 20*2100*10750, 20*2100*10800, 20*2100*11600.

A514 grade B steel material surface cracks refer to the linear cracks on the surface of A514 grade B steel material, which should generally be the same as the forging or rolling direction. Formation reason: it is mainly due to the hairline, hot crack and cold crack caused by surface over burning, decarburization, looseness, deformation and excessive internal stress during processing (forging, rolling, heat treatment, quenching and tempering), as well as the high content of sulfur and phosphorus impurities on the surface. Inspection method: A514 grade B steel material surface cracks can be detected by naked eye observation, acid pickling, magnetic particle inspection, coloring inspection and metallographic method.

The European Iron and Steel Industry Union (Eurofer) has sent a letter to the president of the European Commission, asking the Commission to review the existing trade safeguard measures immediately, proposing to reduce the steel import quota by 75% within six months to help the European steel industry cope with the current difficult situation; For imported steel exceeding the quota, the tariff rate can be reduced to less than 25%. Europe has also proposed restrictions on A514 grade B steel material and so on steel imports related to crisis and safety.