Standard Practice for
Injection Molding Test Specimens of Thermoplastic Molding
and Extrusion Materials1
This standard is issued under the fixed designation D 3641; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope *
1.1 This practice covers the general principles to be followed when injection moulding test specimens of thermoplastic
moulding and extrusion materials. This practice is to be used to
obtain uniformity in methods of describing the various steps of
the injection moulding process and to set up uniform methods of
reporting these conditions. The exact conditions required to
prepare suitable specimens will vary for each plastic material.
Those conditions should become a part of the specification for
the material, or be agreed upon between the purchaser and the
supplier. Any requirements or recommendations in the material
specification which differs from this standard takes precedence
over those in this standard.
1.2 The methodology presented assumes the use of reciprocating screw injection moulding machines.
1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
1.4 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 1—This practice is equivalent to the following parts of ISO 294:
Plastics—Injection Moulding of Test Specimens of Thermoplastic Materials2
; 294-1: Part 1—General Principles and Multipurpose Test Specimens (ISO Type A Mould) and Bars (ISO Type B Mould)2
; ISO 294-2:
Part 2—Small Tensile Bars (ISO Type C Mould); ISO 294-3: Part
3—Plates (ISO Type D Moulds).
2. Referenced Documents
2.1 ASTM Standards:
D 256 Test Methods for Impact Resistance of Plastics and
Electrical Insulating Materials3
D 570 Test Method for Water Absorption of Plastics3
Click below to download Astm D 3641 – 02 pdf free
Click here to download Astm D 3639 – 92 (Reapproved 2002) Pdf Free Download