Prospect of China's weathering steel Q295NH export situation in 2021

A709Gr50 steel is a high-strength low-alloy stee. It is widely used in engineering structures, such as building steel structures, construction machinery, mining and mountain machinery, trucks, bridges, pressure vessels, especially for those requiring good weldability and toughness Construction and construction machinery parts. BBNsteel's engineers suggest customer choose low temperature impacting test for steel A709 grade 50 at zero centigree, because these steel plates A709Gr50 normally used in this temperature.

Normalizing is a heat treatment that improves the toughness of steel. After the steel components are heated to 30-50°C above the Ac3 temperature, they are kept for a period of time and then air cooled. The main feature is that the cooling rate is faster than annealing but lower than quenching. During normalizing, the crystal grains of the steel weathering steel Q295NH can be refined in a slightly faster cooling. Not only can satisfactory strength be obtained, but also the toughness (AKV value) can be significantly improved and reduced The tendency of the component to crack.

In order to obtain the seamless tube with smaller size and better quality, the method of cold rolling, cold drawing or the combination of the two must be used. Cold rolling is usually carried out on a two high mill, and weathering steel Q295NH pipes are rolled in a circular pass composed of a variable cross-section circular groove and a fixed conical head. Cold drawing is usually carried out on single chain or double chain cold drawing machines of 0.5-100t.

Structural steel plate weathering steel Q295NH discount online
15*2320*9790, 12.5*2060*7410, 12*1540*5390, 12.5*1730*14930, 11*3910*6450, 17*2000*10650, 13.5*1905*8920, 6*1730*7840, 12.5*3790*8900, 12.5*3600*8810, 32*1301*6600, 12.5*1530*8000, 12*1590*9770, 16*2300*14200, 14.5*3690*10960, 20*2100*8950, 6*1800*4500, 14*1700*9200, 12.5*1790*15910, 5*1829*6096, 13*3200*10700, 9*1301*4000, 11*1510*5370, 12.5*1730*14770, 12.7*1829*6096, 13*2970*9800, 13.5*2890*5350, 12.5*2145*10360, 14*1860*13880, 24*2715*7800.