Engineering Materials
Machining properties of steel are improved by adding

Chromium, nickel
Silicon, aluminium, titanium
Sulphur, lead, phosphorous
Vanadium, aluminium

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Engineering Materials
The charge of the blast furnace consists of

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

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