What is the difference between cast iron pneumatic valves and cast steel valves, do you still not clear?

cast iron with the pneumatic valve main difference is that the carbon content of iron steel, carbon content directly affects the strength and plasticity of steel. Carbon steel or carbon steel, carbon content of WC is less than % iron carbon alloy. Carbon steel in addition to carbon generally contain small amounts of silicon, manganese, sulfur, phosphorus by purpose can be divided into carbon structural steel, carbon tool steel, the carbon steel and structural steel cutting three categories. Carbon structural steel is divided into building structural steel and machine manufacturing steel two according to carbon content can be divided into low carbon steel, the carbon steel WC ≤ . %) , medium carbon steel ( WC. %— — 。 %) And the high carbon steel ( WC> 。 %) According to the phosphorus, sulfur content can be divided into ordinary carbon steel to carbon steel ( Phosphorus, sulfur, high) , high quality carbon steel, Phosphorus, sulfur, low) And the high quality steel ( Phosphorus, sulfur, lower) The higher the carbon content is higher in general carbon steel, hardness, strength is high, but low plasticity.
cast iron, cast iron is the carbon content in the % above the
iron carbon alloy cast iron can be divided into:, grey cast iron, white cast iron, malleable cast iron, nodular cast iron, vermicular cast iron, alloy cast iron
what we call the general pneumatic valve, cast iron with spheroidal graphite cast iron, grey cast iron will molten iron after spheroidizing treatment, precipitation of graphite spheres, hereinafter referred to as ductile iron. Than ordinary grey cast iron has high strength, good toughness and plasticity; Cast

to pouring casting steel. One of the casting alloy. Cast steel can be divided into cast carbon steel, cast low alloy steel and special steel casting class; Casting of the carbon steel. Carbon as the main alloying element and cast steel containing small amounts of other elements. Carbon is less than. % for casting of low carbon steel, carbon. % ~。 % for medium carbon steel casting, carbon is greater than. % for casting high carbon steel. With the increase of carbon content, increase the intensity of the casting of the carbon steel, hardness increase. Casting of the carbon steel has high strength, plasticity and toughness, low cost, in the heavy machinery used in the manufacture of high load of parts, such as rolling mill frame and press the base; On the railway vehicle parts used in the manufacture of force big and withstand shock bolsters and side frames, such as wheels and coupling, etc. ;
from the perspective of the material characteristics of the above, the more rigid than cast steel, cast iron brittle is also bigger than cast steel, cast steel is better than cast iron has good plasticity and toughness, so cast iron is generally used in low pressure pipeline, at the same time also can only be used in normal temperature of the pipeline, because of the increase of pressure or temperature is pneumatic valve will have certain deformation trace, against cast iron pneumatic valve is relative to the pneumatic valve cast iron cast steel pneumatic valve can be applied in pipeline pressure or temperature is higher.
iron pneumatic valve applications: for example, we often see the tap water pipe pneumatic valves, pneumatic valves and surface spray paint black, this kind of pneumatic valve is cast iron valves.