ASTM D7775-11e1 - 1.12.2011
 
Significance and Use

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.

 
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

C886-21

Standard Test Method for Scleroscope Hardness Testing of Carbon and Graphite Materials

C1259-21

Standard Test Method for Dynamic Young’s Modulus, Shear Modulus, and Poisson’s Ratio for Advanced Ceramics by Impulse Excitation of Vibration

E228-22

Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer

C695-21

Standard Test Method for Compressive Strength of Carbon and Graphite

C714-23

Standard Guide for Thermal Diffusivity of Carbon and Graphite by Thermal Pulse Method

C747-23

Standard Test Method for Moduli of Elasticity and Fundamental Frequencies of Carbon and Graphite Materials by Sonic Resonance

C748-20

Standard Test Method for Rockwell Hardness of Graphite Materials

C611-21

Standard Test Method for Electrical Resistivity of Manufactured Carbon and Graphite Articles at Room Temperature

C651-20

Standard Test Method for Flexural Strength of Manufactured Carbon and Graphite Articles Using Four-Point Loading at Room Temperature

C565-15(2021)

Standard Test Methods for Tension Testing of Carbon and Graphite Mechanical Materials

C559-16(2020)

Standard Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles

E1461-13(2022)

Standard Test Method for Thermal Diffusivity by the Flash Method

C781-20

Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components

C769-15

Standard Test Method for Sonic Velocity in Manufactured Carbon and Graphite Materials for Use in Obtaining an Approximate Value of Young's Modulus

C749-15(2020)

Standard Test Method for Tensile Stress-Strain of Carbon and Graphite

C1161-18(2023)

Standard Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature