Square ductile cast iron manhole cover

The ball mill cast iron square Manhole Cover is mainly a manhole cover made of ball mill cast iron, The quality of this manhole cover is related to the spheroidization rate . Antirust asphalt paint is commonly used to treat castings  Of course, the surface of the ball mill Cast Iron Manhole Cover is also treated with anti-rust asphalt paint
The advantage of the ball cast iron manhole cover is that the ball cast iron manhole cover is lighter than the same type of gray cast iron manhole cover because of the high strength and good toughness of the ball cast iron.