Metals  Strength vs. Temperature
The influence of temperature on the strength of metals.
The diagram below indicates the influence of temperature on the strength of
 bronze
 copper
 structural steel
 castings steel
 cast iron
 wrought iron
 stainless steel (304N)
Strength of Metals  SI Units
Strength of Metals  Imperial Units
Most ferrous metals have their maximal strength at about 200 ^{o}C (400 ^{o}F). Modulus of elasticity decreases gradually with increased temperature until it rapidly falls off.
Example  Strength of Copper at 100 ^{o}C
As indicated in the first figure  the strength of copper is reduced to approximately
95 % at 100 ^{o}C
With an Ultimate Tensile Strength  σ_{u}  of 220 MPa for copper  the strength is reduced to
0.95 (220 MPa)
= 209 MPa
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