ASTM D6456-10(2018)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D6456 −10 (Reapproved 2018)
Standard Specification for
Finished Parts Made from Polyimide Resin
This standard is issued under the fixed designation D6456; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.10 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification is intended to be a means of calling
ization established in the Decision on Principles for the
out finished plastic parts ready for industrial or consumer use.
Development of International Standards, Guides and Recom-
1.2 This specification covers finished parts and shapes from
mendations issued by the World Trade Organization Technical
which parts are machined, made from a semi-crystalline
Barriers to Trade (TBT) Committee.
polyimide (PI).
2. Referenced Documents
1.3 This specification is intended to replace MIL-R-46198
and Provisional Standard Specification PS 93.
2.1 ASTM Standards:
D638 Test Method for Tensile Properties of Plastics
NOTE 1—There is no known ISO equivalent to this standard.
D695 Test Method for Compressive Properties of Rigid
1.4 This specification covers parts made from semi-
Plastics
crystalline polyimide, which is a thermosetting material that
D790 Test Methods for Flexural Properties of Unreinforced
shows no softening or melting by DMA (D4065) at or below
and Reinforced Plastics and Electrical Insulating Materi-
260°C (500°F).
als
1.5 Since PI is a thermoset resin, no provisions are included
D792 Test Methods for Density and Specific Gravity (Rela-
for recycled products.
tive Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
1.6 The classification system outlined in this specification is
D1600 Terminology forAbbreviatedTerms Relating to Plas-
intended to be identical to that used by Department of Defense
tics
for over 20 years. No changes are intended at this time.
D1708 Test Method forTensile Properties of Plastics by Use
1.7 The values are stated in SI units and are regarded as
of Microtensile Specimens
standard in all property and dimensional tables. For reference
D3892 Practice for Packaging/Packing of Plastics
purposes, inch-pound units are stated in parentheses.
D4065 Practice for Plastics: Dynamic Mechanical Proper-
1.8 Application—Parts in this specification are generally
ties: Determination and Report of Procedures
used for applications requiring the following combination of
E8 Test Methods for Tension Testing of Metallic Materials
properties: low coefficient of friction, and low thermal expan-
2.2 ANSI Standard:
sion coupled with heat resistance for continuous operation at
Z1.4 Standard for Sampling Plans and Tables for Inspection
temperatures up to 260°C (500°F) and for short-term excur-
3,4
by Attributes
sions upward to 482°C (900°F).
2.3 Military Standards:
1.9 The following precautionary caveat pertains only to the
MIL-R-46198 Resin, Polyimide, Hot Pressed or Pressed and
test method portion, Section 12, of this specification: This
Sintered
standard does not purport to address all of the safety concerns,
MIL-STD129 StandardPractice,MilitaryMarkingforShip-
if any, associated with its use. It is the responsibility of the user
ment and Storage
of this standard to establish appropriate safety, health, and
environmental practices and determine the applicability of
regulatory limitations prior to use.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
This specification is under the jurisdiction of ASTM Committee D20 on the ASTM website.
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
Materials. 4th Floor, New York, NY 10036.
Current edition approved Aug. 1, 2018. Published August 2018. Originally Replaced MIL-STD-105.
approved in 1999. Last previous edition approved in 2010 as D6456 - 10. DOI: Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
10.1520/D6456-10R18. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6456−10 (2018)
TABLE 2 Manufacturing Method and Form
3. Terminology
Suffix Letter Product Form
3.1 Definitions—Terms are defined in accordance with Ter-
M Hot isostatically molded billet
minologies D883 and D1600 unless otherwise indicated.
P Hot unidirectionally pressed slab
D Direct-formed (pressed) and sintered parts
4. Classification
4.1 Product shape and size as defined in the applicable
purchase order.
6.4 No reground material shall be permitted.
4.2 The type of product shall be categorized by type and
6.5 The basic material shall be free of major defects and
class depending on resin and filler compositions defined as
contaminants that would be detrimental to fabrication or
follows:
performance of a finished part.
Type I Unfilled base resin
Type II Resin with graphite filler
7. Physical Property Requirements
Class 1 15 % by weight graphite filler, nominal
Class 2 40 % by weight graphite filler, nominal
7.1 The physical property values listed within this specifi-
Class 3 15 % by weight graphite and 10 % by weight fluorocarbon
cation’s tables are to be considered minimum specification
fillers, nominal
values. Any requirement for specific test data for a given
Type III 15 % by weight molybdenum disulfide filler, nominal
production lot should be specified at the time of order.
NOTE 2—Filler contents shown above are approximate. See Table 1 for
exact composition.
8. Dimensional Requirements
4.3 Polymer compositions shall be specified by use of
8.1 Size, shape, dimensions, and tolerances are to be deter-
type/class designations as described in Table 1.
mined by agreement between purchaser and buyer.
4.4 Manufacturing method and product form shall be speci-
fied by use of a suffix letter as described in Table 2. 9. Sampling
4.5 When applying the suffix letter, the type/class designa-
9.1 Sampling shall be statistically adequate to satisfy the
tion shall precede the letter. requirements of this specification as applicable (see ANSI
Z1.4).
5. Ordering Information
9.2 For purposes of sampling, an inspection lot for exami-
5.1 All shapes covered by this specification shall be ordered
nation and tests shall consist of
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