An alloy of Component A and Component B,which do not react but are miscible in all proportions in molten state,is used to manufacture Fail Safe devices for boiler. Narrate the effect of composition on equilibrium: Solid Liquid with the help of a phase diagram, if the melting point of A (900 C), B (350 C) and the lowest melting of all compositions is 280 C at 12.6% of A and 87.4% of B.