NS321

NS321 is a nickel-molybdenum based nickel-based corrosion resistant alloy. It has good corrosion resistance to various concentrations of boiling hydrochloric acid, and also to non-oxidizing acids such as sulfuric acid, phosphoric acid, hydrofluoric acid, bromic acid, formic acid, acetic acid and organic acids. It has the characteristics of high temperature strength, dimensional stability and high specific resistance. It has good cold and hot processing properties.

NS321 corrosion resistant alloy characteristics. 1. Control the elemental iron and chromium at low content to prevent the generation of β-phase Ni4Mo. 2. Excellent corrosion resistance to reducing environments. 3. Good resistance to moderate concentration of sulfuric acid and many non-oxidizing acid corrosion. 4. Very good resistance to chloride ion reduction stress corrosion cracking (SCC). 5. Good resistance to corrosion of various organic acids. NS321 corrosion resistant alloy processing. Hot working deformation pressure is high, deformation temperature is 1000-1200 degrees, cold forming and plasticity is good when cold working. Solid solution temperature at 1150-1170 degrees, annealing temperature at 1000-1100 degrees is appropriate. Welding for weldability, can be used for general purpose welding, but should not be used for welding methods that can lead to carbon increase. NS321 corrosion resistant alloy corrosion resistance. Nickel-molybdenum alloy of carbon, silicon content is very low, reducing the precipitation of carbon and other impurities in the heat-affected zone of welding, so its weld also has sufficient corrosion resistance. It has good corrosion resistance in reducing media, such as HCl solutions of various temperatures and concentrations. It also has good resistance to corrosion in moderate concentrations of sulfuric acid solutions (or containing amounts of chloride ions). It can also be used in CH3COOH and phosphoric acid environments. The alloy material has good corrosion resistance only when it has a suitable metallographic state and a pure crystal structure. NS321 corrosion resistant alloy applications. NS321 corrosion resistant alloy is used in corrosive environments resistant to HIC acids and wet HIC gases. Chemical process vessels, pipelines, towers and tanks, etc., can also be used in castings for valves and pumps. Its fine wire can be used as electron tube cathode material.