17
2
1.67
2.2
2.04
2.4
2.46
1.17
2.6
2.92
1.38
2.8
3.43
1.6
3
4
1.84
3.2
2.1
3.4
2.38
3.6
2.68
3.8
3
4
3.34
4.2
3.7
4.4
4.08
4.6
4.48
4.8
4.91
5
5.36
5.2
5.83
5.4
6.33
5.6
6.86
5.8
7.42
6
8
6.2.8 The hardness test should be uniformly distributed on the specimen. The distance between
two adjacent indentation’s centers should be not less than 3 times the diameter of the
indentation; the distance between the indentation center and the edge of the specimen
should be not less than 2.5 times the diameter of the indentation. Failure to comply can
result in asymmetric indents resulting in incorrect hardness values.
6.2.9 Each indentation diameter is measured on two vertical directions. The ratio of the
diameter difference on two vertical directions and the shorter diameter should not be
greater than 1%.
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