ASTM E23
Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
Published by ASTM International (ASTM)
The CFR incorporates ASTM E23 by reference, which makes the edition it names part of the regulation. The CFR requires the edition it names, which may not be the newest. To enforce any other edition, the agency must publish the change in the Federal Register.
The 2 editions the CFR requires
Different parts name different editions; each applies where its part says so. Newest first.
ASTM E23-18, approved June 1, 2018
As the CFR lists it: “ASTM E23-18, Standard Test Methods for Notched Bar Impact Testing of Metallic Materials, approved June 1, 2018 (“ASTM E23”)”
- Listed in 46 CFR 54.01-1(b)(4); required by46 CFR 54.05-5 ↗
- Listed in 46 CFR 56.01-2(c)(45); required by46 CFR 56.50-105 ↗
ASTM E23-98, 1998
As the CFR lists it: “ASTM E 23-98 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials, 1998”
- Listed in 49 CFR 171.7(v)(47); required by49 CFR 178.57 ↗
How to read it
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ASTM E23 is copyrighted by its publisher; RegKnot shows its title and the editions the CFR names, not its text. Read from the eCFR's incorporation-by-reference sections, current as of October 26, 2026. The regulation text governs. All standards the CFR requires.