BBN supply chemical composition of NM450 hardness

Try to use chemical composition of NM450 high-quality alkaline covered electrode as much as possible, and don't use inferior electrode to save money. According to the theory of chromium poor, chromium carbide will be precipitated on the upper edge of the grain boundary of the weld and heat affected zone when the chemical composition of NM450 temperature range is between 450 ℃ and 850 ℃, resulting in chromium poor grain boundary, which is insufficient to resist corrosion.

chemical composition of NM450, Wear-resistant steel plates are composed of two parts, namely carbon steel plate and alloy wear-resistant layer. Under normal circumstances, the thickness of the alloy wear-resistant layer of the wear-resistant steel plate is 1/3-1/2 of the total thickness. When working, the matrix provides comprehensive properties such as strength, toughness and plasticity against external forces. And the alloy wear-resistant layer provides wear-resistant properties to meet the requirements of specified working conditions.

chemical composition of NM450 products order online: 8*2400*12000, 9*2300*6870, 10*2400*8300, 10*2400*8450, 12*2820*11500, 14*1950*10000, 14*1950*10450, 14*1950*10500, 14*1950*10550, 14*1950*10600, 14*1950*10700, 14*1950*10800, 14*2150*8500, 14*2150*9300, 14*2400*10000, 16*2150*10950, 20*1950*9000, 20*1950*9150, 25*2100*8400, 25*2100*8650, 25*2400*11600.

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 chemical composition of NM450 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.