This test method covers the determination of the tensile
properties of thermosetting reinforced plastics using test
specimens of uniform nominal width when tested under defined
conditions of pretreatment, temperature, humidity, and
NOTE 1—Experience with this test method to date has been limited
to glass-reinforced thermosets. Applicability to other materials
remains to be determined.
This test method can be used for testing materials of any
thickness up to 14 mm (0.55 in.).
NOTE 2—This test method is not intended to cover precise
physical procedures. It is recognized that the
constant-rate-of-crosshead-movement type of test leaves much to be
desired from a theoretical standpoint, that wide differences may
exist between rate-of-crosshead movement and rate of strain between
gage marks on the specimen, and that the testing speeds specified
disguise important effects characteristic of materials in the
plastic state. Further, it is realized that variations in the
thicknesses of test specimens that are permitted by these
procedures, produce variations in the surface-volume ratios of such
specimens, and that these variations may influence the test
results. Hence, where directly comparable results are desired, all
samples should be of equal thickness. Special additional tests
should be used where more precise physical data are needed.
NOTE 3—Use of this test method for testing materials of
thicknesses greater than 14 mm (0.55 in.) is not recommended.
Reducing the thickness by machining may be acceptable for materials
of uniform reinforcement amount and direction, but is generally not
Test data obtained by this test method is relevant and
appropriate for use in engineering design.
The values stated in SI units are to be regarded as standard.
The inch-pound units given in parentheses are for information
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
NOTE 4—This test method is technically equivalent to ISO 527-4
except as noted below:
(a) This test method does not include testing of the
Type I dogbone shaped specimen described in ISO 527-4. Testing of
this type of specimen, primarily used for reinforced and
un-reinforced thermoplastic materials, is described in Test Method
(b) The thickness of test specimens in this test method
includes the 2 mm to 10 mm thickness range of ISO 527-4, but
expands the allowable test thickness to 14 mm.
NOTE 5—For tensile properties of resin-matrix composites
reinforced with oriented continuous or discontinuous high modulus
> 20-Gpa (> 3.0 × 106 -psi) fibers, tests shall be made in
accordance with Test Method D3039/D3039M or ISO 527 Part 5.
*A Summary of Changes section appears at the end of this
Order online or call: Americas: +1 800 854 7179 | Asia Pacific: +852 2368 5733 | Europe, Middle East, Africa: +44 1344 328039