Engineering Materials
Chromium in steel

Improves wear resistance, cutting ability and toughness
Improves cutting ability and reduces hardenability
Gives ductility, toughness, tensile strength and anti-corrosion properties
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

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Engineering Materials
Stress relaxation is the phenomenon

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

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