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Selection Of Testing Speed
Selection Of Testing Speed
The selection of a testing (or crosshead) speed depends
upon the material being tested and the type of test. Mate-
rials that are very stiff, such as metals and rigid plastics,
should be tested at a slow speed. The other extreme is
highly extensible materials, such as elastomers, which
are tested at a fast speed, generally 20 inches per minute
(500 mm/min). For materials in between these two ex-
tremes, an intermediate speed should be used. Table A-2
lists a range of speeds used to test various materials.
Table A-2.
A-8
Typical Testing Speed Ranges for Various
Materials
MATERIAL
Metals
Wire
Rigid Plastics
Plastic Films
Tire Cord
Yarn and Fabrics
Elastomers
M10-94400-1
SPEED
in/min (mm/min)
.02-1.0 (.5-20)
.2-2.0 (5-50)
.2-2.0 (5-50)
.5-20 (10-500)
12 (300)
12 (300)
10-20 (200-500)
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