Technical document

Hardness conversion Shaw hard comparison table

2017-02-08 11:53:25 hooren

Shore hardness D

Shore hardness C

Shore hardness A

Polymer type

90



Hard molding

86




83



Medium hardness plastic

80




77




74




70




65

95



60

93

98

Flexible plastic

55

89

96


50

80

94


42

70

90


38

65

86

rubber

35

57

85


30

50

80


25

43

75


20

36

70


15

27

60


12

21

50


10

18

40


8

15

30


6.5

11

20


4

8

10


The higher the number of plastic hardness, the harder the material, and the smaller the number, the softer the material.



Shore hardness HA, HD and Shore hardness HR(R scale) plastic hardness value conversion table

HA

HD

HR

species


100

130

Superhard plastic


99

129


98

128


97

127


96

126


95

125


94

124


93

123


92

122


91

121


90

120

Rigid plastic


89

116


88

114


87

112


86

110


85

108


84

106

Medium hard plastic


83

104


82

102


81

100


80

98


79

96


78

94


77

92


76

90


75

86


74

82


73

79


72

76


71

73


70

70


69

68


68

66


67

64


66

62

Flexible plastic

98

65

60


64

58


63

56

97

62

54


61

52

96

60

50


59

48


58

46

95

57

44


56

42

94

55

40

94

54

38


53

36


52

34

93

51

32


50

31


49

--

92

48

30


47

--


46

29

91

45

--


44

28


43

--

90

42

27

89

41


88

40


87

39


rubbers

86

38


86

37


--

36


85

35


84

34


83

33


82

32


81

31


80

30


75

25


70

20


60

15


50

12


40

10


30

8


20

6.5


10

4



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