The elongation of low alloy high strength steel is 15% - 23%, and the impact absorption energy is more than 34J at room temperature. The A709 grade 50 low alloy steel sheet, low alloy high strength steel has good plasticity and impact resistance, which can avoid brittle fracture during impact, and make cold bending and welding easy. In addition, the brittle transition temperature of low alloy high strength steel is low, and the absorbed work value of Grade E steel is not less than 27J at - 40℃. This is of great significance to the engineering components and transportation tools such as vehicles, ships, offshore oil platforms, containers, bridges and so on.
General Administration of Customs: China's A709 grade 50 low alloy steel sheet and so on steel export in December was 4.684 million tons. According to data released by the General Administration of Customs on Tuesday, China's steel imports in December 2019 were 1.483 million tons, and the total imports in 2019 were 12.304 million tons, down 6.5% from 1316.6 in 2018. China's steel export in December 2019 was 4.684 million tons, and the annual export volume in 2019 was 64.293 million tons, 7.3% less than 69.335 million tons in 2018.
The A709 grade 50 low alloy steel sheet processing performance is good. Due to the uniform control of steel plate performance, excellent performance coordination and good toughness guarantee, the steel plate bending processing, drilling, cutting and other mechanical processing properties are excellent. In addition, the surface of the A709 grade 50 low alloy steel sheet steel plate is smooth and beautiful by inhibiting and removing oxide scale from slab heating to rolling process and heat treatment in furnace without oxidation atmosphere.
Hot rolling and cold rolling are all the processes of forming steel plates or profiles, which have a great influence on the structure and properties of steel. The rolling of steel is mainly hot rolling, and cold rolling is usually used to produce small size steel and thin plate. With the development of new technologies such as the precision of hot rolling size, shape and surface quality and the continuous emergence of new products, A709 grade 50 low alloy steel sheet, hot rolled steel strip and steel plate are widely used and have more and more competitive strength in the market.
