SA709 grade 50 carbon steel plate sheet hardness chart

SA709 grade 50 carbon steel plate sheet, Q890E steel plate is a kind of quenched and tempered steel plate for high strength structure, in which "Q" means yield, "890" means yield value, "E" means grade level. Q890E steel is equivalent to EN grade S890QL.Executive standard of Q890E steel plate: GB / T 16270.Q890E steel plate delivery status (heat treatment): quenching and tempering.The size, shape, weight and allowable deviation of Q890E steel plate shall comply with GB / T709.

The characteristic of niobium in SA709 grade 50 carbon steel plate sheet etc. steel material is to increase the recrystallization temperature of austenite, so as to achieve the purpose of refining austenite grains. In general, the amount of niobium added in steel material is less than 0.05%, and the contribution of niobium above 0.05% to strengthening and toughening will no longer be obvious.

Global SA709 grade 50 carbon steel plate sheet crude steel production in March this year increased by 2.6 percent month on month and fell by six percent year on year to 147.1 million metric tons. accordina to the World Steel Association (worldsteel).In the first quarter of this year, global SA709 grade 50 carbon steel plate sheet crude steel production decreased to 443.03 million mt, down 1.4 percent year on year.