ASTM F519-12a

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Designation: F519 − 12 F519 − 12a
Standard Test Method for
Mechanical Hydrogen Embrittlement Evaluation of Plating/
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Coating Processes and Service Environments
This standard is issued under the fixed designation F519; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This test method describes mechanical test methods and defines acceptance criteria for coating and plating processes that
can cause hydrogen embrittlement in steels. Subsequent exposure to chemicals encountered in service environments, such as fluids,
cleaning treatments or maintenance chemicals that come in contact with the plated/coated or bare surface of the steel, can also be
evaluated.
1.2 This test method is not intended to measure the relative susceptibility of different steels. The relative susceptibility of
different materials to hydrogen embrittlement may be determined in accordance with Test Method F1459 and Test Method F1624.
1.3 This test method specifies the use of air melted AISI E4340 steel per SAE AMS-S-5000 (formerly MIL-S-5000) heat treated
to 260 –to 280 ksi (pounds per square inch x 1000) ×1000) as the baseline. This combination of alloy and heat treat level has been
used for many years and a large database has been accumulated in the aerospace industry on its specific response to exposure to
a wide variety of maintenance chemicals, or electroplated coatings, or both. Components with ultimate strengths higher than 260
–to 280 ksi may not be represented by the baseline. In such cases, the cognizant engineering authority shall determine the need
for manufacturing specimens from the specific material and heat treat condition of the component. Deviations from the baseline
shall be reported as required by section 12.1.2. The sensitivity to hydrogen embrittlement shall be demonstrated for each lot of
specimens as specified in section 9.5.
1.4 Test procedures and acceptance requirements are specified for seven specimens of different sizes, geometries, and loading
configurations.
1.5 Pass/Fail Requirements—For plating/coating processes, specimens must meet or exceed 200 h using a sustained load test
(SLT) at the levels shown in Table 3.
1.5.1 The loading conditions and pass/fail requirements for service environments are specified in Annex A5.
1.5.2 If approved by the cognizant engineering authority, a quantitative, accelerated (≤24 h) incremental step-load (ISL) test
as defined in Annex A3 may be used as an alternative to SLT.
1.6 This test method is divided into two parts. The first part gives general information concerning requirements for hydrogen
embrittlement testing. The second is composed of annexes that give specific requirements for the various loading and specimen
configurations covered by this test method (see section 9.1 for a list of types) and the details for testing service environments.
1.7 The values stated in the foot-pound-second (fps) system in inch-pound units are to be regarded as standard. The values given
in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.8 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
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2.1 ASTM Standards:
B374 Terminology Relating to Electroplating
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This test method is under the jurisdiction of ASTM Committee F07 on Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.04 on Hydrogen
Embrittlement.
Current edition approved June 1, 2012Nov. 15, 2012. Published September 2012December 2012. Originally approved in 1977. Last previous edition approved in 20102012
as F519 – 10.F519 – 12. DOI: 10.1520/F0519-12.10.1520/F0519-12A.
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