What is malleable cast iron used for?
Uses include electrical fittings, hand tools, pipe fittings, washers, brackets, fence fittings, power line hardware, farm equipment, mining hardware, and machine parts. Before the widespread use of malleable iron in everyday items, heavy-duty bench vises were made from cast steel.
Is cast iron malleable?
Mechanical properties of malleable cast iron Malleable cast iron like ductile iron possesses considerable ductility and toughness because of its combination of nodular graphite and low carbon metallic matrix. However the nodules are not truly spherical as they are in ductile iron but are irregularly shaped aggregates.
Which cast iron is more malleable?
Ductile Cast Iron Small amounts of magnesium is added. Ductile iron is very similar to malleable iron, but parts can be cast larger compared to malleable iron where there is a limit of how large the part sections can be cast.
What are the differences and similarities between malleable cast iron and white cast iron?
Gray cast iron has a high dampening capacity and is corrosion resistant. However it is brittle, and can be difficult to machine as it is hard to produce a smooth surface and can reduce tool life. Malleable iron has good shock resistance, is ductile and is very machinable.
How do you know if cast iron is malleable?
Malleable cast iron has lower CE (Table 1) than gray cast iron, solidifying white. The phase diagram and the cooling curve characteristic of white cast iron are illustrated in Fig. 1. It can be seen in the cooling curve that the temperature reached TC before nucleation of graphite, thus resulting in white iron.
What’s the best way to weld cast iron?
1. Manual Metal Arc Welding (MMA) This type of welding, also known as shielded metal arc welding (SMAW), is generally believed to be the best overall process for cast iron welding – provided that the correct welding rods are used.
What is malleable and ductile?
Ductility is said to be the property of a material to stretch without getting damaged. Metals having ductile property can be stretched into wires. Malleability is said to be the property of a material to deform under compression. The metals having malleable property can be rolled or beaten into sheets.
Is malleable iron weldable?
Malleable iron is easily weldable. True cast iron is difficult to weld. Malleable iron cast fittings typically are certified as either class 150 malleable iron (150# malleable) (most common home use) or class 300 malleable iron (300# malleable) (commercial building use).
Is ductile malleable?
While most malleable metals are also ductile, the two properties can be exclusive. Lead and tin, for example, are malleable and ductile when they are cold but become increasingly brittle when temperatures start rising towards their melting points.
Can You Weld malleable iron?
Welding White Cast Iron. Because of its extreme hardness and brittleness, white cast iron is considered unweldable. Malleable Cast Iron. During welding, the ductility of the heat affected zone (HAZ) of malleable cast iron is severely reduced because graphite dissolves and precipitates as iron carbide. Grey Cast Iron. As grey cast iron contains graphite in flake form, carbon can readily be introduced into the weld pool, causing weld metal embrittlement.