This kind of pipe valve is iron or iron?
But the screw is above the wrought iron, the general can not be easily broken by the screw of pig iron, pig ironIt can't make a wrought iron screw for low carbon steel, to ensure its strength in high carbon steel or alloy steel can
This type of pipe valve material mainly belongs to pig iron
This type of pipe valve belongs to pig iron.Because of the soft wrought iron, cast iron with high hardness. This kind of pipe valve is made of cast iron.
