Materials and Construction
Most suitable material for high pressure vessel operating at 500 atm. and 500° C is

Mild steel
High silicon iron (14% Si)
Molybdenum stainless steel
18/8 stainless steel

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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
Has a body centred cubic (bcc) crystal lattice structure
Dimagnetic

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