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 A514 grade B alloy steel plate are higher than that of annealed A514 grade B alloy steel plate, but the elimination of internal stress is not as good as annealing. The normalizing operation of A514 grade B alloy steel plate is simple, the cost is low, the productivity is high, and it is widely used in actual production.
EN10113 S275M is a technical delivery conditions for thermomechanical rolled weldable fine grain structural steels.S means the structural steel, M means the delivery condition.The EN10113 S275M steel is equivalent to DIN StE285TM, UNI FeE275KGTM. EN10113 S275M steel plate/sheet, EN10113 S275M steel plate/sheet, under EN standard, we can regard A514 grade B alloy steel plate, S275M steel plate/sheet for Fine-grain structural steels, thermomechanically rolled steel.
Medium thick steel plate refers to the steel plate with a thickness of not less than 3 mm but less than 20 mm. It can be produced by reversible hot rolling medium and heavy plate mill, and its thin products can also be processed by cold rolling mill. A514 grade B alloy steel plate, Medium thick steel plates are mainly used in boilers, shipbuilding, railway cars, automobiles, containers, military industry, national defense, construction, bridges and containers.
On Jan. 31, 2019, BBN steel held the annual meeting with all employees, family members, and friends. It is a moment of joyand it is a moment to summarize the past and look forward.Looking back on 2018, BBN steel exported A514 grade B alloy steel plate more than 2 million tons of steel materials to all parts of the world and made outstanding contributions to infrastructure construction at home and abroad. In 2019, BBN steel will make persistent efforts and forge ahead.
