At first, the development of cast steel was to meet the production needs that exceeded the capacity of cast iron and bronze valves. However,
due to the overall good performance of carbon steel valves and their high resistance to stress caused by thermal expansion, impact load,
and pipeline deformation, their range of use is expanded, usually including the working conditions of using cast iron valves and bronze valves.
Suitable for medium and high pressure valves with operating temperatures between -29~425 ℃. Among them, 16Mn and 30Mn are commonly used as substitutes
for ASTM A105, with temperatures ranging from -40 to 400 ℃. Applicable media are saturated steam and superheated steam. High and low temperature oil products,
liquefied gases, compressed air, water, natural gas, etc.