文档介绍：American Association State
Designation: E 8/E 8M – 08 Highway and Transportation Officials Standard
AASHTO No.: T68
An American National Standard
Standard Test Methods for
Tension Testing of Metallic Materials1
This standard is issued under the fixed designation E 8/E 8M; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* A 356/A 356M Specification for Steel Castings, Carbon,
These test methods cover the tension testing of metallic Low Alloy, and Stainless Steel, Heavy-Walled for Steam
materials in any form at room temperature, specifically, the Turbines
methods of determination of yield strength, yield point elon- A 370 Test Methods and Definitions for Mechanical Testing
gation, tensile strength, elongation, and reduction of area. of Steel Products
The gage lengths for most round specimens are required B 557 Test Methods for Tension Testing Wrought and Cast
to be 4D for E 8 and 5D for E 8M. The gage length is the most Aluminum- and Magnesium-Alloy Products
significant difference between E 8 and E 8M Test Specimens B 557M Test Methods for Tension Testing Wrought and
Test specimens made from powder metallurgy (P/M) materials Cast Aluminum- and Magnesium-Alloy Products [Metric]
are exempt from this requirement by industry-wide agreement E4 Practices for Force Verification of Testing Machines
to keep the pressing of the material to a specific projected area E6 Terminology Relating to Methods of Mechanical Test-
and density. ing
Exceptions to the provisions of these test methods may E29 Practice for Using Significant Digits in Test Data to
need to be made in individual specifications or test met