Engineering Materials
Tungsten in steel

Gives ductility, toughness, tensile strength and anti-corrosion properties
Improves cutting ability and reduces hardenability
Improves wear resistance, cutting ability and toughness
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

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Engineering Materials
The charge of the blast furnace consists of

Calcined ore (4 parts), coke (1 part) and limestone (8 parts)
Calcined ore (1 part), coke (8 parts) and limestone (4 parts)
Calcined ore, coke and limestone all in equal parts
Calcined ore (8 parts), coke (4 parts) and limestone (1 part)

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Engineering Materials
Carbon steel is

Made by adding carbon in steel
Extensively used for making cutting tools
Refined from cast iron
An alloy of iron and carbon with varying quantities of phosphorus and sulphur

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