Depends on temperature.
ultimate stress=Factor of safety*Allowable stress
allowable bending stress for en8
allowable bending stress for en8
allowable stress design-2/3rd of yield working stress design is process yield
stress in old concrete
70.4 megapascle
1400Kgf/cm2
1,642 lbs
800n/mm2
A factor of safety against yield is applied to design stress Yield Stress/ Design Stress = Factor of safety The factor of safety varies for different industries; 1.5 is used in structural steel design for buildings; 1.25 or even 1.1 for aircraft/space systems
1400 kgf/cm2 anindya
The maximum allowable stress is that value beyond which, after applying an appropriate factor of safety its particular strength criterion is exceeded and failure occurs. For example, if aluminum strength in yield is 35,000 psi, and factor of safety is 1.25, its maximum allowable stress against yield is 35,000/1.25 = 28,000 psi