Both cast iron and forged steel fittings are essential parts of commercial buildings and houses. They connect pipes in buildings, including lavatory fixtures, showers, drainage pipes and wastewater pipes. Car and aviation industries also use them for making cars, trains, buses and aeroplanes. If your home-improvement project involves replacing fittings, you will want to know which type of fitting is suitable for each replacement.
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Cast iron is a mixture of iron, 2 to 4 per cent carbon and other metals including manganese and silicon and small amounts of phosphorus and sulphur. Casting iron involves melting the iron and pouring it into a mould to create the desired shape.
To make forged steel, a blacksmith heats the steel until it is malleable and then presses, pounds or bends the steel into a desired shape. The forging process creates a stronger steel that can withstand higher pressure. It lasts longer than unforged steel and is more resistant to permanent deformation.
Both cast iron fittings and forged steel fittings are durable. Cast iron rusts more than steel and is not suitable to use for pipes that deliver drinking water. Forged steel is more resistant to fatigue and lasts longer than cast iron. Due to the abundance of iron, cast iron is cheaper to produce than forged steel, which requires a mix of more precious metals. Cast iron fittings are more versatile and come in a wider range of shapes, while forged steel fittings come only in limited designs.
Aside from fittings, there are many uses for cast iron and forged steel. Examples of cast iron and forged steel products are flanges, threads, pipes and bars. The furniture industry utilises cast iron and forged steel for making chairs, tables and accessories. Cast iron is popular for making decorative railings, gates and fireplaces.The construction industry uses forged steel to build bridges, telegraph poles and train tracks because of its durability and higher fatigue tolerance.
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