Engineering Materials
Stress relaxation is the phenomenon

In which parts are not loaded
In which stress remains constant on increasing load
Stress reduces on increasing load
In which deformation tends to loosen the joint and produces a stress reduced

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Engineering Materials
Pick up wrong statement about wrought iron

It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It is very soft and ductile
It contains carbon of the order of 0 to 0.25%
It melts at 1535°C

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