Material

Max

temperature (˚C)

$m_2$

Elongation

specified

Reduction of area specified

${\alpha }_{sl}$

Ferritic steel

480

$0.6\cdot \left(1-R_t\right)$

$2\cdot \ln \left(1+{\epsilon }_{break}\right)$

$\ln \left(\frac{1}{1+A}\right)$

2.2

Aluminum

120

$0.52\cdot \left(0.98-R_t\right)$

$1.3\cdot \ln \left(1+{\epsilon }_{break}\right)$

$\ln \left(\frac{1}{1+A}\right)$

2.2