Introduction to the fluidity of malleable steel pipe fittings casting

The fluidity of molten iron mainly depends on the carbon equivalent and pouring temperature, and has nothing to do with the shape of graphite. In the case of the same carbon equivalent, there is no significant difference in the fluidity of flake graphite, vermicular graphite and nodular graphite cast iron. However, the carbon content of vermicular graphite cast iron is higher, and its strength is higher than that of high-strength gray cast iron with low carbon equivalent. Therefore, under the same tensile strength, the fluidity of vermicular graphite cast iron is much higher than that of gray cast iron.

From the fluidity test results of various cast irons, it can be seen that even if the pouring temperature of malleable steel pipe fittings is slightly lower than that of alloy cast iron, its fluidity is far greater than that of alloy cast iron. There is not much difference in their mobility.