Engineering Materials
The usual composition of a soldering alloy is

Tin, lead and silver
Tin and copper
Tin and lead
Tin, lead and small percentage of antimony

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Engineering Materials
The temperature required for full annealing in hypereutectoid steel is

30° C to 50° C below lower critical temperature
30° C to 50° C above lower critical temperature
30° C to 50° C above upper critical temperature
30° C to 50° C below upper critical temperature

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