ASTM F519-05

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Designation: F 519 – 05
Standard Test Method for
Mechanical Hydrogen Embrittlement Evaluation of Plating/
1
Coating Processes and Service Environments
This standard is issued under the fixed designation F 519; 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.
1. Scope that give specific requirements for the seven specimens cov-
ered by this test method and the details for testing service
1.1 This test method covers mechanical tests for the evalu-
environments.
ation of hydrogen embrittlement from plating/coating pro-
1.5.1 Annex A1 details circumferentially-notched tensile
cesses or subsequent service environments (including cleaning
specimens. Annex A2 details self-loading notched specimens
treatments, maintenance chemicals or gaseous environments),
including; round tensile, round bend and C Ring specimens.
or both, that may contact the surface of steels.
Annex A3 details a notched, four-point bend specimen that
1.2 This test method is intended to be used as a process
combines sustained load and slow strain rate testing, using
control for hydrogen produced by plating/coating processes
incrementalloadsandholdtimesunderdisplacementcontrolto
and exposure to chemicals encountered in a service environ-
measureathresholdstressinanacceleratedmanner.Thetestin
ment. It is not intended to measure the relative susceptibility of
AnnexA3 measures the threshold for hydrogen stress cracking
differentsteels.Therelativesusceptibilityofdifferentmaterials
that is used to quantify the amount of residual hydrogen in the
to hydrogen embrittlement may be determined in accordance
specimen. Annex A4 details a smooth O-Ring specimen under
with Test Method F 1459.
displacement control. Annex A5 details testing in service
1.3 This test method assumes that air melted AISI E4340
environments.
steel per MIL-S-5000 at 51 to 53 Rockwell C Hardness Scale
1.6 Specific requirements for the two types of specimens
(HRC) is the worst case; that is, all other heat-treated,
and the seven specific loading and geometrical configurations
high-hardness steels are less susceptible to hydrogen embrittle-
are as listed:
ment. The sensitivity to hydrogen embrittlement shall be
1.6.1 Type 1—Notched Specimens
demonstrated for each heat of steel used in the manufacture of
Type 1a: Notched, Round, Tension
test specimens.
Type 1a.1—Standard Size Annex A1
1.4 Test procedures and acceptance requirements are speci-
Type 1a.2—Oversized Annex A1
fied for seven specimens of different sizes, geometries, and
Type 1b: Notched, Round, Tension—Self Loading Fixture Annex A2
Type 1c: Notched, Round, Bend—Self Loading Fixture Annex A2
loading configurations. For plating/coating processes, speci-
Type 1d: Notched, C-Ring, Bend—Self Loading Fixture Annex A2
mens must meet or exceed 200 hours at a sustained load of
Type 1e: Notched, Square, Bend—Displacement Control Annex A3
75 % of the notched fracture strength (NFS) (92 % of the
1.6.2 Type 2—Smooth Specimens
ultimate strength for the Type 2a O-Ring specimen) or exceed
Type 2a: O-Ring, Bend—Self Loading Fixture Annex A4
a threshold of 75 % of the NFS for a quantitative, accelerated
(#24 hours) incremental step-load (ISL) test. For service
1.7 The values stated in the foot-pound-second (fps) system
environments, loading conditions, and pass/fail requirements
in inch-pound units are to be regarded as standard. The values
for each specimen are specified in Annex A5.
given in parentheses are mathematical conversions to SI units
1.5 This test method is divided into two parts. The first part
that are provided for information only and are not considered
gives general information concerning requirements for hydro-
standard.
gen embrittlement testing. The second is composed of annexes
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 appro-
1
This test method is under the jurisdiction of ASTM Committee F07 on
priate safety and health practices and determine the applica-
Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.04 on
bility of regulatory limitations prior to use.
Hydrogen Embrittlement.
Current edition approved April 1, 2005. Published April 2005. Originally
e2
approved in 1977. Last previous edition approved in 1997 as F 519 – 97 .
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F519–05
2. Referenced Documents ID = inside diameter
2
ISL = incremental s
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