Engineering Materials
Machining properties of steel are improved by adding

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

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Engineering Materials
The charge of the blast furnace consists of

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