ASTM D7775-16

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. The objective of this guide is to provide advice on how the application of selected standards under noncompliant conditions can be tested for suitability.  
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

• Status: Historical
• Publication Date: 14-Dec-2016
• ICS: 59.100.20 - Carbon materials
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.F0 - Manufactured Carbon and Graphite Products

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7775 − 16
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Graphite by Thermal Pulse Method
C747TestMethodforModuliofElasticityandFundamental
1.1 This guide covers best practice for properties measure-
Frequencies of Carbon and Graphite Materials by Sonic
ments on small (nonstandard) graphite specimens and require-
Resonance
ments for representing properties of the bulk material. This
C748Test Method for Rockwell Hardness of Graphite Ma-
guide is aimed specifically at measurements required on
terials
nuclear graphites, where there may be constraints on the
C749Test Method for Tensile Stress-Strain of Carbon and
geometry or volume of the test specimen, or both. The
Graphite
objective of this guide is to provide advice on how the
C769Test Method for Sonic Velocity in Manufactured
application of selected standards under noncompliant condi-
Carbon and Graphite Materials for Use in Obtaining an
tions can be tested for suitability.
Approximate Value of Young’s Modulus
1.2 The values stated in SI units are to be regarded as
C781PracticeforTestingGraphiteMaterialsforGas-Cooled
standard. No other units of measurement are included in this
Nuclear Reactor Components
standard.
C886Test 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 C1161Test 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- C1259Test Method for Dynamic Young’s Modulus, Shear
bility of regulatory limitations prior to use.
Modulus, and Poisson’s Ratio forAdvanced Ceramics by
Impulse Excitation of Vibration
2. Referenced Documents
D7972Test Method for Flexural Strength of Manufactured
2
Carbon and GraphiteArticles Using Three-Point Loading
2.1 ASTM Standards:
at Room Temperature
C559Test Method for Bulk Density by Physical Measure-
E228Test Method for Linear Thermal Expansion of Solid
ments of Manufactured Carbon and Graphite Articles
Materials With a Push-Rod Dilatometer
C565Test Methods for Tension Testing of Carbon and
E1461Test Method for Thermal Diffusivity by the Flash
Graphite Mechanical Materials
Method
C611TestMethodforElectricalResistivityofManufactured
Carbon and Graphite Articles at Room Temperature
3. Summary of Guide
C651Test Method for Flexural Strength of Manufactured
CarbonandGraphiteArticlesUsingFour-PointLoadingat
3.1 There is currently a suite of ASTM standards (see 2.1)
Room Temperature
that can be applied to graphite covering a range of physical,
C695Test Method for Compressive Strength of Carbon and
mechanical, electrical and thermal property measurements.
Graphite
Each of these standards has been developed with the objective
C714Test Method for Thermal Diffusivity of Carbon and
ofoptimizingthemethodofmeasurementintheabsenceofany
constraints on test specimen production. Without exception,
these standards specify limits on the ratio between test speci-
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum
mendimensionsandcokeandfillergrainsizesorprescribetest
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-
specimen geometries or size ranges, or both. The default
mittee D02.F0 on Manufactured Carbon and Graphite Products.
position for any user should be to follow these standards
Current edition approved Dec. 15, 2016. Published February 2017. Originally
exactly as described. However, in some applications, available
approved in 2011. Last previous edition approved in 2015 as D7775–11 (2015).
DOI: 10.1520/D7775-16.
test material or experiment design constraints on test specimen
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
sizes may result in noncompliance. The objective of this guide
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
is to provide advice on how the application of selected
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. standards under noncompliant conditions can be tested for
*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
1

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D7775 − 16
suitabilit
...

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: D7775 − 11 (Reapproved 2015) D7775 − 16 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 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. The objective of this guide is to provide
advice on how the application of selected standards under noncompliant conditions can be tested for suitability.
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 an Approximate
Value of 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
D7972 Test Method for Flexural Strength of Manufactured Carbon and Graphite Articles Using Three-Point Loading at Room
Temperature
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
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved June 1, 2015Dec. 15, 2016. Published July 2015February 2017. Originally approved in 2011. Last previous edition approved in 20112015 as
ε1
D7775 – 11 (2015). . DOI: 10.1520/D7775-11R15.10.1520/D7775-16.
2
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.
*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
1

---------------------- Page: 1 ----------------------
D7775 − 16
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 dim
...