Materials and Construction
All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain

Increases in proportion to stress
Decreases very quickly
Increases very quickly
Decreases in proportion to stress

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Materials and Construction
Nickel as a material of construction

Is paramagnetic below 415° C (its Curie temperature)
Is used as an alloying element for both ferrous & non-ferrous alloys
Dimagnetic
Has a body centred cubic (bcc) crystal lattice structure

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