1. General
Figure 1 quantifies the possibilities offered by steels through curves showing the evolution of tensile strength as a function of carbon content and after various heat treatments.
After quenching and tempering, the usable range in practice is between :
a lower limit corresponding to a high-temperature temper which does not lead to very high strength performances (unless the steel contains carburigenic alloying elements), but ensures a high level of ductility characteristics and therefore safety;
an upper limit corresponding to stress-relieving tempering (180 to 220 C), which preserves high strength characteristics,...
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General
Properties
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"Studies and properties of metals"
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