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.
MATERIAL
SPEED
in/min (mm/min)
Metals .02-1.0 (.5-20)
Wire .2-2.0 (5-50)
Rigid Plastics .2-2.0 (5-50)
Plastic Films .5-20 (10-500)
Tire Cord 12 (300)
Yarn and Fabrics 12 (300)
Elastomers 10-20 (200-500)
Table A-2. Typical Testing Speed Ranges for Various
Materials
Selection Of Testing Speed M10-94400-1
A-8