Dear Sir,

Following is the fatigue table given in FAT file "5-100-1A"

Cycles___Stress(N/Sq mm)
10_______7997.736
100______2826.786
1000_____1144.504
10000____523.99
100000___275.794
1000000__186.154
10000000_172.365

My Observation is
1. Why the stress value given for 10 cycles(7997.736 N/Sq mm) is higher than UTS also?
2. The least value of stress listed above is 172.365 N/Sq mm. How will CAESAR use this curve, if we use it for evaluation of steels with lesser allowables?

Please Correct me if my understanding is wrong.