1) Strength (N/m^2)
2) Stiffness (lbs/in)
3) Fatigue (number of cycles to failure)
The period of the iron age was around 1000 B.C. The Significant discovery of that time was the ability to
refine iron. This process is needed because it does not occur naturally =. The discovery of this process is
important because Iron is harder and stronger than other metal