Specimen Number σa1(MPa) n1 σa2(MPa) n2
1 300 Until failure
2 300 Until failure
3 570 Until failure
4 570 Until failure
5 570 Until failure
6 300 171000 570 Until failure
7 300 341000 570 Until failure
8 300 341000 570 Until failure
9 300 521000 570 Until failure