Are fire hoses all cast iron? Is it to avoid welding? Cast iron can not be welded, is it?
Cast iron: cast iron is a general term of cast iron carbon alloy containing more than 2% carbon. It is usually made up of pig iron, scrap steel, ferroalloy and so on in different proportions.
The main elements of iron, carbon and silicon, manganese and other small amounts of phosphorus and sulfur and other elements, is pig iron (sometimes steel and iron) re melted down, and adding iron alloy, steel scrap, recycled iron obtained by adjusting the composition of. An iron carbon alloy containing more than 2% carbon. Industrial cast iron generally contains carbon from 2% to 4%. Carbon is often found in graphite form in cast iron and sometimes in cementite form. In addition to carbon, the cast iron also contains 1% to 3% silicon, as well as manganese, phosphorus, sulfur and other elements. Alloy cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron.
Generally, the fittings are malleable iron, they can not be welded, and the welded pipe fittings are also made of steel.
