Materials and Construction
In cold working of metal as compared to its hot working

Cracks and blow holes are eliminated
Ductility and impact strength improves
Appreciable strain hardening is produced
Yield stress, hardness and fatigue strength is not at all affected

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Materials and Construction
Duriron is

Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
All of these
High silicon iron
Acid resistant, brittle and very hard

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