Question

A ductile cast-iron bar is to support a load of 178 kN in a heat-treating furnace used to make malleable cast iron. The bar is located in a spot that is continuously exposed to 500°C. Design the bar so that it can operate for at least 10 years without failing.

Answer 1

Answer: L.M = 34.69

Area of the bar = 25835m^2

Explanation: To design a bar that can withstand temperature at 773K for 10years, we need to calculate and know:

1) the Larson Miller value

2) rupture time

3) creep rate

4) stress and load.

Please find the attached file for the solution