5
The overview of the application limits of the individual SHORE hardness test
procedures is only for comparative purpose and is no reference chart
General information on Shore hardness testing:
The principle used to measure hardness is based on measuring the resistance force of the
penetration of a sensing pin of defined geometry into the test material under a known spring
load. The amount of penetration is measured and indicated on a scale with 100 Shore
graduation marks.
As the amount of penetration of the sensing pin is 2.5 mm max., the material to be tested
should have a minimum thickness of 6 mm.
The hardness scale covers a range from 0 to 100, where 0 corresponds to the minimum
and 100 to the maximum hardness value.
2 Available Models
Model Shore
Typical Applications
Examples
SHTA
A
Soft rubber, elastomers, natural rub-
ber products, soft PVC, etc.
Rubber rollers, rubber hoses,
leather, etc.
SHTD
D
Hard rubber, rigid thermoplastic prod-
ucts, formica, hard plastic materials
Acrylic glass, polystyrene, etc.
Shore C
10
20
30
40
50 60 70 80
Shore B
90
80
70
60
50
40
30
20
10
10
20
30
40
50
60
70
80
90
Shore A
Shore D
10
20
30
40 50
Shore DO
10
20
30
40
50 60 70 80 90
Shore O
20
30
40
50
60
70
80
soft
hard
hardness
90
80
70
60
50
Shore AO
Summary of Contents for SHT Series
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