Engineering Materials
1841 high speed steel contains

Vanadium 4%, chromium 18% and tungsten 1%
Vanadium 1%, chromium 4% and tungsten 18%
Vanadium 18%, chromium 1% and tungsten 4%
None of these

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Engineering Materials
Malleable cast iron

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Is produced by annealing process. It is soft, tough, and easily machined metal
Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

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Engineering Materials
The temperature required for full annealing in hypereutectoid steel is

30° C to 50° C below upper critical temperature
30° C to 50° C above lower critical temperature
30° C to 50° C above upper critical temperature
30° C to 50° C below lower critical temperature

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