ASTM D7293-19

Standard Specification for Extruded and Compression-Molded Shapes Made from Polyetherimide (PEI)

ABSTRACT
This test method covers requirements and test methods for the material, dimensions, and workmanship, and the properties of extruded and compression-molded sheet, plate, rod and tubular bar manufactured from polyetherimide (PEI) resins. The type of PEI extruded shape shall be categorized by class depending on composition. Every class of PEI shape shall be categorized into one grade for virgin unfilled products. The type and class shall be further differentiated based on dimensional tolerances and dimensional stability (based on elevated temperature excursion testing). Grades 1 and 2 materials are produced with the closest commercial tolerances and lowest stress levels for machined parts. The type, class, and grade is further differentiated based on dimensional stability (elevated temperature excursion test). Tensile strength at break, elongation at break, flexural modulus, izod impact, and tensile modulus (tangent) shall be tested to meet the requirements prescribed. The plate specimens, sheet specimens, rod specimens, and tubular bar specimens shall be tested to meet the requirements prescribed.
SCOPE
1.1 This specification covers requirements and test methods for the dimensions, workmanship, and the properties of extruded and compression-molded sheet, plate, rod and tubular bar manufactured from polyetherimide (PEI) resins.  
1.2 The properties included in this specification are those required for the compositions covered. It is possible that other requirements will be necessary to identify particular characteristics important to specialized applications. These shall be specified by using the suffixes as given in Section 5.  
1.3 This specification does not allow for the use of recycled plastics (as defined in Guide D7209).  
1.4 The values stated in English units are regarded as standard in all property and dimensional tables. For reference purposes, SI units are also included in Table 1 and Table S-PEI.  
1.5 The following safety hazards caveat pertains only to the test method or test methods described in this specification. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: There is no known ISO equivalent to this standard.  
1.6 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.

General Information

• Status: Published
• Publication Date: 31-Jul-2019
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D7293-12 - Standard Specification for Extruded and Compression-Molded Shapes Made from Polyetherimide (PEI)
• Effective Date: 01-Aug-2019
• Refers: ASTM D5205-24 - Standard Classification System and Basis for Specification for Polyetherimide (PEI) Molding and Extrusion Materials
• Effective Date: 01-Feb-2024
• Refers: ASTM D883-24 - Standard Terminology Relating to Plastics
• Effective Date: 01-Feb-2024
• Refers: ASTM D883-23 - Standard Terminology Relating to Plastics
• Effective Date: 01-Nov-2023
• Refers: ASTM D883-20 - Standard Terminology Relating to Plastics
• Effective Date: 01-Jan-2020
• Refers: ASTM D883-19c - Standard Terminology Relating to Plastics
• Effective Date: 01-Aug-2019
• Refers: ASTM D883-19a - Standard Terminology Relating to Plastics
• Effective Date: 15-Apr-2019
• Refers: ASTM D883-19 - Standard Terminology Relating to Plastics
• Effective Date: 01-Feb-2019
• Refers: ASTM D883-18a - Standard Terminology Relating to Plastics
• Effective Date: 01-Dec-2018
• Refers: ASTM D883-18 - Standard Terminology Relating to Plastics
• Effective Date: 01-Nov-2018
• Refers: ASTM D883-17 - Standard Terminology Relating to Plastics
• Effective Date: 15-Aug-2017
• Refers: ASTM D790-17 - Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
• Effective Date: 01-Jul-2017
• Refers: ASTM D5205-16 - Standard Classification System and Basis for Specification for Polyetherimide (PEI) Materials
• Effective Date: 01-Sep-2016
• Refers: ASTM D790-15e1 - Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
• Effective Date: 01-Dec-2015
• Refers: ASTM D790-15 - Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
• Effective Date: 01-Dec-2015

Overview

ASTM D7293-19 is the standard specification for extruded and compression-molded shapes made from polyetherimide (PEI) resins. This standard establishes consistent requirements and test methods for the manufacture, quality, and performance of PEI sheets, plates, rods, and tubular bars. PEI is a high-performance engineering thermoplastic, widely valued for its excellent thermal stability, dimensional precision, and mechanical strength. ASTM D7293-19 specifically addresses the composition, dimensions, tolerances, physical properties, and workmanship for virgin and glass-filled PEI products, ensuring reliability and uniformity for a wide range of industries and applications.

Key Topics

• Material Categories and Classification

  • PEI shapes are classified by type (composition), class (general versus specialty), and grade (commercial tolerances and stress levels).
  • Only virgin, unfilled PEI is considered for standard grades; glass-filled and other specialty forms are specified for enhanced properties.

• Physical and Mechanical Properties

  • Standardized properties include tensile strength, elongation at break, tensile modulus, flexural modulus, impact resistance (Izod method), and dimensional stability.
  • Dimensional stability is evaluated through elevated temperature excursion testing.

• Dimensional Accuracy and Tolerances

  • Specific tolerances are set for diameter, thickness, roundness, camber, bow, and squareness, ensuring machinability and fit for precision applications.

• Testing and Certification

  • The document mandates testing via ASTM methods such as D638 for tensile properties and D790 for flexural properties.
  • Certification and test reporting are required for material traceability and customer confidence.

• Workmanship and Defect Controls

  • PEI shapes must be free from visible defects like blisters, cracks, voids, foreign particles, and must meet standards for cleanliness and uniformity.

Applications

ASTM D7293-19 applies to industries and engineering sectors requiring high-quality PEI components with reliable mechanical and thermal performance. Key application areas include:

• Aerospace:

  • Structural components, electrical insulation parts, and precision machined hardware benefit from PEI’s stability and strength.

• Electronics and Electrical:

  • PEI sheet and rod are used for insulating parts, connectors, and circuit substrates, thanks to good dielectric properties and heat resistance.

• Medical Devices:

  • Extruded PEI shapes offer bio-compatibility and are suitable for sterilizable equipment, housings, and surgical instrumentation.

• Industrial Manufacturing:

  • Gears, bushings, wear pads, and valve components produced with certified PEI stock maintain tight tolerances and resist deformation under load and elevated temperatures.

• Automotive:

  • Parts subjected to high mechanical stresses and heat cycles, such as under-hood components and electrical housings.

Related Standards

When using or specifying PEI shapes under ASTM D7293-19, the following related ASTM standards are commonly referenced:

• ASTM D5205: Classification system and basis for specification for polyetherimide (PEI) materials.
• ASTM D638: Test method for tensile properties of plastics.
• ASTM D790: Test methods for flexural properties of unreinforced and reinforced plastics.
• ASTM D256: Test methods for determining the Izod pendulum impact resistance of plastics.
• ASTM D618: Practice for conditioning plastics for testing.
• ASTM D3892: Practice for packaging and packing of plastics.
• ASTM D883: Terminology relating to plastics.

Note: There is no direct ISO equivalent for ASTM D7293-19.

By adhering to ASTM D7293-19, manufacturers and users can ensure PEI extruded and molded shapes consistently meet stringent quality, dimensional, and performance requirements, supporting robust design and dependable end products in demanding technical applications.

Standards Content (Sample)

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:D7293 −19
Standard Specification for
Extruded and Compression-Molded Shapes Made from
Polyetherimide (PEI)
This standard is issued under the fixed designation D7293; 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.
INTRODUCTION
This specification is intended to be a means of calling out plastic shapes used in the fabrication of
end items or parts.
1. Scope* 2. Referenced Documents
1.1 This specification covers requirements and test methods 2.1 ASTM Standards:
for the dimensions, workmanship, and the properties of ex- D256 Test Methods for Determining the Izod Pendulum
truded and compression-molded sheet, plate, rod and tubular Impact Resistance of Plastics
bar manufactured from polyetherimide (PEI) resins. D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
1.2 The properties included in this specification are those
D790 Test Methods for Flexural Properties of Unreinforced
required for the compositions covered. It is possible that other
and Reinforced Plastics and Electrical Insulating Materi-
requirements will be necessary to identify particular character-
als
istics important to specialized applications. These shall be
D883 Terminology Relating to Plastics
specified by using the suffixes as given in Section 5.
D3892 Practice for Packaging/Packing of Plastics
1.3 This specification does not allow for the use of recycled
D4000 Classification System for Specifying Plastic Materi-
plastics (as defined in Guide D7209).
als
1.4 The values stated in English units are regarded as D5205 Classification System and Basis for Specification for
Polyetherimide (PEI) Materials
standard in all property and dimensional tables. For reference
purposes,SIunitsarealsoincludedinTable1andTableS-PEI. D7209 Guide for Waste Reduction, Resource Recovery, and
Use of Recycled Polymeric Materials and Products (With-
1.5 The following safety hazards caveat pertains only to the
drawn 2015)
testmethodortestmethodsdescribedinthisspecification. This
IEEE/ASTM SI-10 American National Standard for Use of
standard does not purport to address all of the safety concerns,
theInternationalSystemofUnits(SI):TheModernMetric
if any, associated with its use. It is the responsibility of the user
System
of this standard to establish appropriate safety, health, and
2.2 ANSI Standard:
environmental practices and determine the applicability of
Z1.4-1993 Sampling Procedures and Tables for Inspection
regulatory limitations prior to use.
by Attributes
NOTE 1—There is no known ISO equivalent to this standard.
1.6 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions—For definitions of the terms used in this
ization established in the Decision on Principles for the
specification and associated with plastics issues, refer to the
Development of International Standards, Guides and Recom-
terminology contained in D883.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
This specification is under the jurisdiction of ASTM Committee D20 on Standards volume information, refer to the standard’s Document Summary page on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic the ASTM website.
Materials. The last approved version of this historical standard is referenced on
Current edition approved Aug. 1, 2019. Published August 2019. Originally www.astm.org.
approved in 2006. Last previous edition approved in 2012 as D7293 – 12. DOI: Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/D7293-19. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7293−19
3.2 Definitions of Terms Specific to This Standard: 4.1.1 The type of PEI extruded shape shall be categorized
3.2.1 rod, n—extruded solid cylindrical shape with a mini- by composition.
mum diameter of ⁄16 in. (1.6 mm).
4.1.2 There shall be only one class of PEI shape, for virgin
products.
3.2.2 sheet, n—flat stock with thickness greater than ⁄4-in.
4.1.2.1 Class 1—General purpose product made using
(6.4-mm).
100 % virgin resin.
3.2.3 tubular bar, n—extruded annular shapes with mini-
mum inside diameter of ⁄8 in. (0.5 mm) and minimum wall
4.2 The type and class shall be further differentiated based
thickness of ⁄16 in. (1.6 mm). on dimensional tolerances and dimensional stability (based on
elevated temperature excursion testing). Grades 1 and 2 shapes
4. Classification
are produced with the closest commercial tolerances and
4.1 This specification covers shapes extruded and compres- lowest stress levels for machined parts as delineated inTableA
sionmoldedfrompolyetherimide(PEI)resinsaslistedinTable and Table B. Any additional or custom tolerance requirements
S-PEI. The PEI resin is included in the designation using are to be specified. Custom tolerances shall be noted following
Specification D5205 callout. the grade designation.
TABLE S-PEI Requirements for PEI Shapes, Dry-as-Manufactured (<0.2 % Moisture)
Type Description Class Description Grade Applicable Description Ultimate Tensile Tensile Dimensional
D5205 Tensile Elongation, Modulus, Stability,
A
Callout Strength, % at Break, min min, psi (MPa) %, max
min, psi (MPa)
01 1 Unfilled 1 D5205 General 14 000 50 425 000 0.4
PEI 0113 purpose (97) (2930)
1 Unfilled 0 Other
02 Glass filled 1 10 % glass 1 . General 14 500 2 500 000 0.4
reinforced purpose (100) (3447)
Glass filled 1 20 % glass 2 . General 15 000 2 600 000 0.4
reinforced purpose (103) (4137)
Glass filled 1 30 % glass 3 D5205 General 16 000 2 800 000 0.4
B
reinforced PEI0110 purpose (110) (5516)
Glass filled 1 Glass rein- 0 Other
forced
00 Other 1 Other 0 Other
A
Applicable Classification System D5205 resin type to be specified on purchase order.
B
G30A99169
A
TABLE A Dimensional Requirements for Natural and Glass-Filled Extruded PEI Rod
B
Size, in. Diameter Tolerance, in. Roundness TIR, in. Camber, in./ft
1 1
⁄16 +0.002–0.001 0.002 2 ⁄2 /8
1 1
⁄8 +0.002–0.001 0.002 2 ⁄2 /8
3 1
⁄16 +0.002–0.001 0.002 2 ⁄2 /8
1 1
⁄4 +0.003–0.001 0.002 2 ⁄2 /8
3 1
⁄8 +0.003–0.001 0.002 2 ⁄2 /8
1 1
⁄2 +0.003–0.001 0.002 2 ⁄2 /8
5 1
⁄8 +0.003–0.001 0.002 2 ⁄2 /8
3 1
⁄4 +0.003–0.001 0.002 2 ⁄2 /8
7 1
⁄8 +0.003–0.001 0.002 2 ⁄2 /8
1 +0.003–0.001 0.002 1 ⁄4 /8
1 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
1 1
1 ⁄4 +0.005–0.000 0.005 1 ⁄4 /8
3 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
1 1
1 ⁄2 +0.005–0.000 0.005 1 ⁄4 /8
5 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
3 1
1 ⁄4 +0.005–0.000 0.005 1 ⁄4 /8
7 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
2 +0.005–0.000 0.010 1 ⁄4 /8
1 3 1
2 ⁄8 –2 ⁄4 +0.005–0.000 0.030 1 ⁄4 /8
3 +0.250–0.000 0.060 1/4/4
A
Based on dry-as-manufactured condition and proper product storage and handling.
B
To convert inches to millimeters, multiply by 25.40.
D7293−19
TABLE B Dimensional Requirements for Natural and Glass-Filled Extruded and Compression-Molded PEI Sheets and Plates
A
(Squareness Requirement Listed in 11.4)
B,C
Size, in. Thickness Tolerances, in. Length Camber, in./ft Width Bow, in./ft
1 3 3
⁄16 ±0.005 ⁄4 /4 ⁄16 /2
3 3 3
⁄32 ±0.005 ⁄4 /4 ⁄16 /2
1 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 3 3
⁄16 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 3 3
⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
5 3 3
⁄16 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
7 3 3
⁄16 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 3 3
⁄2 +0.025–0.000 ⁄4 /4 ⁄16 /2
5 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 3 3
⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
7 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1
1 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1 1
1 ⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1 1
1 ⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 1 1
1 ⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1 1
1 ⁄2 +0.025–0.000 ⁄4 /4 ⁄16 /2
5 1 1
1 ⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 1 1
1 ⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
7 1 1
1 ⁄8 +0.250–0.000 ⁄4 /4 ⁄16 /2
1 1
2 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1
Over 2 +0.125–0.000 ⁄4 /4 ⁄16 /2
A
Based on dry-as-manufactured condition and proper product storage and handling.
B
To convert inches to millimeters, multiply by 25.40.
C
Width 24–in. sheet (+0.5 in.-0). Length 48-in. sheet (+1.0 in.-0).
4.3 The type, class, and grade is further differentiated based 4.5 CalloutDesignation—Aone-linesystemshallbeusedto
on dimensional stability (elevated temperature excursion test), specify materials covered by this specification. The system
Table S-PEI and dimensional requirements, Tables A and B. uses predefined cells to refer to specific aspects of this
specification as illustrated in the following examples:
4.4 Property Tables
4.5.1 Description:
4.4.1 Table S-PEI shall be used to describe both extruded or
4.5.1.1 Example 1—Product made from general purpose
compression-molded products.
PEI 0111:
4.4.2 Table 1 shall be used to describe extruded or
CELL CALLOUT: D7293 S-PEI0111
compression-molded products not included in Table S-PEI by
4.5.1.2 Example 2—Product made from extruded PEI, 30 %
way of a cell callout that includes the applicable Table S-PEI
glass-reinforced:
type and specific properties (Designations 1-7).
CELL CALLOUT: D7293 S-PEI0213
4.4.3 To facilitate the incorporation of future or special
materials not covered by Table S-PEI, the other category for 4.5.1.3 Example 3—Product made from extruded PEI, 15 %
type, class, and grade (0010) is shown on the table with the
graphite-filled with tensile strength greater than 8000 psi and
basic properties to be obtained from Table 1, as they apply (see elongation greater than 5 %:
4.5).
CELL CALLOUT: D7293 S-PEI0100 C15 23000000
4.4.4 Reinforcements and Additive Materials—A symbol
4.5.2 The examples illustrate how a one-line, alphanumeric
(single letter) shall be used for the major reinforcement or
sequence can identify the product composition, commercial
combination or both along with two numbers that indicate the
parameters, and physical characteristics of extruded product.A
percentage of addition by mass with the tolerances as tabulated
space shall be used as a separator between the specification
below. This shall be included in all Table 1 callouts (see 4.5,
number and the type designation. No separators are needed
Example 5).
between type, class, and grade. When special notes are to be
Symbol Material Tolerance
included, such information shall be preceded by a comma.
(Based on the Total Mass)
Special tolerances shall be noted in parentheses following a
C Carbon and ±2 %
comma after the specification.
graphite fiber
G Glass ±2 %
5. Physical Properties
L Lubricants Depends upon
(for example, material and
5.1 The physical property values listed within this specifi-
PTFE, graphite, process—
cation’s tables are to be considered minimum specification
silicone, and to be specified
molybdenum disulfide)
values. Any requirement for
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7293 − 12 D7293 − 19
Standard Specification for
Extruded and Compression-Molded Shapes Made from
Polyetherimide (PEI)
This standard is issued under the fixed designation D7293; 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.
INTRODUCTION
This specification is intended to be a means of calling out plastic shapes used in the fabrication of
end items or parts.
1. Scope*
1.1 This specification covers requirements and test methods for the dimensions, workmanship, and the properties of extruded
and compression-molded sheet, plate, rod and tubular bar manufactured from polyetherimide (PEI) resins.
1.2 The properties included in this specification are those required for the compositions covered. It is possible that other
requirements will be necessary to identify particular characteristics important to specialized applications. These shall be specified
by using the suffixes as given in Section 5.
1.3 This specification does not allow for the use of recycled plastics (as defined in Guide D7209).
1.4 The values stated in English units are regarded as standard in all property and dimensional tables. For reference purposes,
SI units are also included in Table 1 and Table S-PEI.
1.5 The following safety hazards caveat pertains only to the test method or test methods described in this specification. 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 safety, health, and healthenvironmental practices and determine the applicability
of regulatory limitations prior to use.
NOTE 1—There is no known ISO equivalent to this standard.
1.6 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.
2. Referenced Documents
2.1 ASTM Standards:
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D883 Terminology Relating to Plastics
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materials
D5205 Classification System and Basis for Specification for Polyetherimide (PEI) Materials
D7209 Guide for Waste Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products (Withdrawn
2015)
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved Aug. 1, 2012Aug. 1, 2019. Published October 2012August 2019. Originally approved in 2006. Last previous edition approved in 20062012 as
D7293 – 06.12. DOI: 10.1520/D7293-06.10.1520/D7293-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7293 − 19
D5205 Classification System and Basis for Specification for Polyetherimide (PEI) Materials
IEEE/ASTM SI-10 American National Standard for Use of the International System of Units (SI): The Modern Metric System
2.2 ANSI Standard:
Z1.4-1993 Sampling Procedures and Tables for Inspection by Attributes
3. Terminology
3.1 Definitions—For definitions of other technical terms pertaining to plastics the terms used in this specification, see
Terminology specification and associated with plastics issues, refer to the terminology contained in D883.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 rod, n—extruded solid cylindrical shape with a minimum diameter of ⁄16 in. (1.6 mm).
3.2.2 sheet, n—flat stock with thickness greater than ⁄4-in. (6.4-mm).
3.2.3 tubular bar, n—extruded annular shapes with minimum inside diameter of ⁄8 in. (0.5 mm) and minimum wall thickness
of ⁄16 in. (1.6 mm).
4. Classification
4.1 This specification covers shapes extruded and compression molded from polyetherimide (PEI) resins as listed in Table
S-PEI. The PEI resin is included in the designation using Specification D5205 callout.
4.1.1 The type of PEI extruded shape shall be categorized by composition.
4.1.2 There shall be only one class of PEI shape, for virgin products.
4.1.2.1 Class 1—General purpose product made using 100 % virgin resin.
4.2 The type and class shall be further differentiated based on dimensional tolerances and dimensional stability (based on
elevated temperature excursion testing). Grades 1 and 2 shapes are produced with the closest commercial tolerances and lowest
stress levels for machined parts as delineated in Table A and Table B. Any additional or custom tolerance requirements are to be
specified. Custom tolerances shall be noted following the grade designation.
TABLE S-PEI Requirements for PEI Shapes, Dry-as-Manufactured (<0.2 % Moisture)
Type Description Class Description Grade Applicable Description Ultimate Tensile Tensile Dimensional
D5205 Tensile Elongation, Modulus, Stability,
A
Callout Strength, % at Break, min min, psi (MPa) %, max
min, psi (MPa)
01 1 Unfilled 1 D5205 General 14 000 50 425 000 0.4
PEI 0113 purpose (97) (2930)
1 Unfilled 0 Other
02 Glass filled 1 10 % glass 1 . General 14 500 2 500 000 0.4
reinforced purpose (100) (3447)
Glass filled 1 20 % glass 2 . General 15 000 2 600 000 0.4
reinforced purpose (103) (4137)
Glass filled 1 30 % glass 3 D5205 General 16 000 2 800 000 0.4
B
reinforced PEI0110 purpose (110) (5516)
Glass filled 1 Glass rein- 0 Other
forced
00 Other 1 Other 0 Other
A
Applicable Classification System D5205 resin type to be specified on purchase order.
B
G30A99169
A
TABLE A Dimensional Requirements for Natural and Glass-Filled Extruded PEI Rod
B
Size, in. Diameter Tolerance, in. Roundness TIR, in. Camber, in./ft
1 1
⁄16 +0.002–0.001 0.002 2 ⁄2 /8
1 1
⁄8 +0.002–0.001 0.002 2 ⁄2 /8
3 1
⁄16 +0.002–0.001 0.002 2 ⁄2 /8
1 1
⁄4 +0.003–0.001 0.002 2 ⁄2 /8
3 1
⁄8 +0.003–0.001 0.002 2 ⁄2 /8
1 1
⁄2 +0.003–0.001 0.002 2 ⁄2 /8
5 1
⁄8 +0.003–0.001 0.002 2 ⁄2 /8
3 1
⁄4 +0.003–0.001 0.002 2 ⁄2 /8
7 1
⁄8 +0.003–0.001 0.002 2 ⁄2 /8
1 +0.003–0.001 0.002 1 ⁄4 /8
1 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
1 1
1 ⁄4 +0.005–0.000 0.005 1 ⁄4 /8
3 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
1 1
1 ⁄2 +0.005–0.000 0.005 1 ⁄4 /8
5 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
3 1
1 ⁄4 +0.005–0.000 0.005 1 ⁄4 /8
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
D7293 − 19
7 1
1 ⁄8 +0.005–0.000 0.005 1 ⁄4 /8
2 +0.005–0.000 0.010 1 ⁄4 /8
1 3 1
2 ⁄8 –2 ⁄4 +0.005–0.000 0.030 1 ⁄4 /8
3 +0.250–0.000 0.060 1/4/4
A
Based on dry-as-manufactured condition and proper product storage and handling.
B
To convert inches to millimetres,millimeters, multiply by 25.40.
D7293 − 19
TABLE B Dimensional Requirements for Natural and Glass-Filled Extruded and Compression-Molded PEI Sheets and Plates
A
(Squareness Requirement Listed in 11.4)
B,C
Size, in. Thickness Tolerances, in. Length Camber, in./ft Width Bow, in./ft
1 3 3
⁄16 ±0.005 ⁄4 /4 ⁄16 /2
3 3 3
⁄32 ±0.005 ⁄4 /4 ⁄16 /2
1 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 3 3
⁄16 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 3 3
⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
5 3 3
⁄16 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
7 3 3
⁄16 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 3 3
⁄2 +0.025–0.000 ⁄4 /4 ⁄16 /2
5 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 3 3
⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
7 3 3
⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1
1 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1 1
1 ⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1 1
1 ⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 1 1
1 ⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1 1
1 ⁄2 +0.025–0.000 ⁄4 /4 ⁄16 /2
5 1 1
1 ⁄8 +0.025–0.000 ⁄4 /4 ⁄16 /2
3 1 1
1 ⁄4 +0.025–0.000 ⁄4 /4 ⁄16 /2
7 1 1
1 ⁄8 +0.250–0.000 ⁄4 /4 ⁄16 /2
1 1
2 +0.025–0.000 ⁄4 /4 ⁄16 /2
1 1
Over 2 +0.125–0.000 ⁄4 /4 ⁄16 /2
A
Based on dry-as-manufactured condition and proper product storage and handling.
B
To convert inches to millimetres,millimeters, multiply by 25.40.
C
Width 24–in. sheet (+0.5 in.-0). Length 48-in. sheet (+1.0 in.-0).
4.3 The type, class, and grade is further differentiated based on dimensional stability (elevated temperature excursion test), Table
S-PEI and dimensional requirements, Tables A and B.
4.4 Property Tables
4.4.1 Table S-PEI shall be used to describe both extruded or compression-molded products.
4.4.2 Table 1 shall be used to describe extruded or compression-molded products not included in Table S-PEI by way of a cell
callout that includes the applicable Table S-PEI type and specific properties (Designations 1-7).
4.4.3 To facilitate the incorporation of future or special materials not covered by Table S-PEI, the other category for type, class,
and grade (0010) is shown on the table with the basic properties to be obtained from Table 1, as they apply (see 4.5).
4.4.4 Reinforcements and Additive Materials—A symbol (single letter) shall be used for the major reinforcement or combination
or both along with two numbers that indicate the percentage of addition by mass with the tolerances as tabulated below. This shall
be included in all Table 1 callouts (see 4.5, Example 5).
Symbol Material Tolerance
(Based on the Total Mass)
C Carbon and ±2 %
graphite fiber
G Glass ±2 %
L Lubricants Depends upon
(for example, material and
PTFE, graphite, process—
silicone, and to be specified
molybdenum disulfide)
M Mineral ±2 %
R Combinations of ±3 % for the total reinforcement
reinforcements or
fillers or both
4.5 Callout Designation—A one-line system shall be used to specify materials covered by this specification. The system uses
predefined cells to refer to specific aspects of this specification as illustrated in the following examples:
4.5.1 Description:
4.5.1.1 Example 1—Product made from general purpose PEI 0111:
CELL CALLOUT: D7293 S-PEI0111
4.5.1.2 Example 2—Product made from extruded PEI, 30 % glass-reinforced:
CELL CALLOUT: D7293 S-PEI0213
4.5.1.3 Example 3—Product made from extruded PEI, 15 % graphite-filled with tensile strength greater than 8000 psi and
elongation greater than 5 %:
CELL CALLOUT: D7293 S-PEI0100 C15 23000000
4.5.2 The examples illustrate how a one-line, alphanumeric sequence can identify the product composition, commercial
parameters, and physical characteristics of extruded product. A space shall be used as a separator between the specification number
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and the type designation. No separators are needed between type, class, and grade. When special notes are to be included, such
information shall be preceded by a comma. Special tolerances shall be noted in parentheses following a comma after the
specification.
5. Physical Properties
5.1 The physical property values listed within this specification’s tables are to be considered minimum specification values. Any
requirement for specific test data for a given production lot shall be specified at the time of order. Physical properties for products
not yet included in Table S-PEI shall be specified using Table 1 for extruded products.
A
TABLE 1 Additional Detail Requirements—Reinforced/Unreinforced
Designation
Order Property 0 1 2 3 4 5 6 7 8 9
Number
1 Tensile strength, Unspecified 6000 8000 10 000 12 000 14 000 16 000 20 000 25 000 Specify
Test Method (41) (55) (69) (83) (97) (110) (138) (172) Value
D638, min,
psi (MPa)
2 Elongation Unspecified 1 3 5 10 20 50 100 200 Specify
at break, Value
Test Method
D638,
%, min
3 Tensile modulus min, Unspecified 100 000 200 000 300 000 400
...