Machine Design
According to Indian standard specifications, a Grey cast iron designated by 'FG 200' means that the

Minimum tensile strength is 200 N/mm²
Carbon content is 2%
Maximum compressive strength is 200 N/mm²
Maximum shear strength is 200 N/mm²

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Machine Design
The elasticity is the property of a material which enables it to

Draw into wires by the application of a tensile force
Regains its original shape after deformation when the external forces are removed
Resists fracture due to high impact loads
Retain deformation produced under load permanently

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