ASTM D7775-11(2015)
(Guide)Standard Guide for Measurements on Small Graphite Specimens
Standard Guide for Measurements on Small Graphite Specimens
SIGNIFICANCE AND USE
4.1 The purpose of this guide is to report considerations, which should be included in testing nonstandard specimens that lie outside the constraints imposed on size/volume in existing ASTM standards for graphite (noting that there are some generic ASTM standards with no such constraints). These constraints may be real or may be an artifact of the round-robin test program that supported the standard. It is the responsibility of the user to demonstrate that the application of a standard outside any specified constraints is valid and reasonably provides properties of the bulk material from which the nonstandard specimen was extracted.
SCOPE
1.1 This guide covers best practice for properties measurements on small (nonstandard) graphite specimens and requirements for representing properties of the bulk material. This guide is aimed specifically at measurements required on nuclear graphites, where there may be constraints on the geometry or volume of the test specimen, or both.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.
General Information
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Designation: D7775 − 11 (Reapproved 2015) An American National Standard
Standard Guide for
1
Measurements on Small Graphite Specimens
This standard is issued under the fixed designation D7775; 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 C748 Test Method for Rockwell Hardness of Graphite Ma-
terials
1.1 This guide covers best practice for properties measure-
C749 Test Method for Tensile Stress-Strain of Carbon and
ments on small (nonstandard) graphite specimens and require-
Graphite
ments for representing properties of the bulk material. This
C769 Test Method for Sonic Velocity in Manufactured
guide is aimed specifically at measurements required on
Carbon and Graphite Materials for Use in Obtaining
nuclear graphites, where there may be constraints on the
Young’s Modulus
geometry or volume of the test specimen, or both.
C781 Practice for Testing Graphite and Boronated Graphite
1.2 The values stated in SI units are to be regarded as
Materials for High-Temperature Gas-Cooled Nuclear Re-
standard. No other units of measurement are included in this
actor Components
standard.
C886 Test Method for Scleroscope Hardness Testing of
1.3 This standard does not purport to address all of the Carbon and Graphite Materials
safety concerns, if any, associated with its use. It is the
C1161 Test Method for Flexural Strength of Advanced
responsibility of the user of this standard to establish appro- Ceramics at Ambient Temperature
priate safety and health practices and determine the applica-
C1259 Test Method for Dynamic Young’s Modulus, Shear
bility of regulatory limitations prior to use. Modulus, and Poisson’s Ratio for Advanced Ceramics by
Impulse Excitation of Vibration
2. Referenced Documents
E228 Test Method for Linear Thermal Expansion of Solid
2
2.1 ASTM Standards: Materials With a Push-Rod Dilatometer
C559 Test Method for Bulk Density by Physical Measure- E1461 Test Method for Thermal Diffusivity by the Flash
ments of Manufactured Carbon and Graphite Articles Method
C565 Test Methods for Tension Testing of Carbon and
Graphite Mechanical Materials
3. Summary of Guide
C611 TestMethodforElectricalResistivityofManufactured
3.1 There is currently a suite of ASTM standards (see 2.1)
Carbon and Graphite Articles at Room Temperature
that can be applied to graphite covering a range of physical,
C651 Test Method for Flexural Strength of Manufactured
mechanical, electrical and thermal property measurements.
CarbonandGraphiteArticlesUsingFour-PointLoadingat
Each of these standards has been developed with the objective
Room Temperature
ofoptimizingthemethodofmeasurementintheabsenceofany
C695 Test Method for Compressive Strength of Carbon and
constraints on test specimen production. Without exception,
Graphite
these standards specify limits on the ratio between test speci-
C714 Test Method for Thermal Diffusivity of Carbon and
men dimensions and coke and filler grain sizes or prescribe test
Graphite by Thermal Pulse Method
specimen geometries or size ranges, or both. The default
C747 Test Method for Moduli of Elasticity and Fundamental
position for any user should be to follow these standards
Frequencies of Carbon and Graphite Materials by Sonic
exactly as described. However, in some applications, available
Resonance
test material or experiment design constraints on test specimen
sizes may result in noncompliance. The objective of this guide
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum
is to provide advice on how the application of selected
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-
standards under noncompliant conditions can be tested for
mittee D02.F0 on Manufactured Carbon and Graphite Products.
suitability.The ultimate objective is to provide guidance on the
CurrenteditionapprovedJune1,2015.PublishedJuly2015.Originallyapproved
ε1
use of each of the ASTM standards listed. The 2011 issue of
in 2011. Last previous edition approved in 2011 as D7775 – 11 . DOI: 10.1520/
D7775-11R15.
this guide addresses eight standards: Test Method C559 for
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Bulk Density by Physical Measurement of Manufactured
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Carbon and GraphiteArticles, Test Method C611 for Electrical
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Resistivity of Manufactured Carbon and Graphite Articles at
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428
...
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.
´1
Designation: D7775 − 11 D7775 − 11 (Reapproved 2015) An American National Standard
Standard Guide for
1
Measurements on Small Graphite Specimens
This standard is issued under the fixed designation D7775; 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
ε NOTE—Minor formatting changes made throughout editorially in July 2012.
1. Scope
1.1 This guide covers best practice for properties measurements on small (nonstandard) graphite specimens and requirements
for representing properties of the bulk material. This guide is aimed specifically at measurements required on nuclear graphites,
where there may be constraints on the geometry or volume of the test specimen, or both.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C559 Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles
C565 Test Methods for Tension Testing of Carbon and Graphite Mechanical Materials
C611 Test Method for Electrical Resistivity of Manufactured Carbon and Graphite Articles at Room Temperature
C651 Test Method for Flexural Strength of Manufactured Carbon and Graphite Articles Using Four-Point Loading at Room
Temperature
C695 Test Method for Compressive Strength of Carbon and Graphite
C714 Test Method for Thermal Diffusivity of Carbon and Graphite by Thermal Pulse Method
C747 Test Method for Moduli of Elasticity and Fundamental Frequencies of Carbon and Graphite Materials by Sonic Resonance
C748 Test Method for Rockwell Hardness of Graphite Materials
C749 Test Method for Tensile Stress-Strain of Carbon and Graphite
C769 Test Method for Sonic Velocity in Manufactured Carbon and Graphite Materials for Use in Obtaining Young’s Modulus
C781 Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor
Components
C886 Test Method for Scleroscope Hardness Testing of Carbon and Graphite Materials
C1161 Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature
C1259 Test Method for Dynamic Young’s Modulus, Shear Modulus, and Poisson’s Ratio for Advanced Ceramics by Impulse
Excitation of Vibration
E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
E1461 Test Method for Thermal Diffusivity by the Flash Method
3. Summary of Guide
3.1 There is currently a suite of ASTM standards (see 2.1) that can be applied to graphite covering a range of physical,
mechanical, electrical and thermal property measurements. Each of these standards has been developed with the objective of
optimizing the method of measurement in the absence of any constraints on test specimen production. Without exception, these
standards specify limits on the ratio between test specimen dimensions and coke and filler grain sizes or prescribe test specimen
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved Dec. 1, 2011June 1, 2015. Published January 2012July 2015. Originally approved in 2011. Last previous edition approved in 2011 as
ε1
D7775 – 11 . DOI: 10.1520/D7775–11.10.1520/D7775-11R15.
2
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 the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D7775 − 11 (2015)
geometries or size ranges, or both. The default position for any user should be to follow these standards exactly as described.
However, in some applications, available test material or experiment design constraints on test specimen siz
...
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