Specimens Number

1

2

3

4

5

6

7

8

9

10

Means

Hardness without irradiation (HB)

32

35

38

39

32

35

37

35

32

35

35

Hardness after irradiation (HB)

35

38

42

48

28

39

41

37

33

35

37.6

Hardness change (HB)

3

3

4

9

−4

4

4

2

1

0

2.6

Change %

9.38

8.57

10.53

23.08

−12.50

11.43

10.81

5.71

3.13

0

7.43