ASTM F519-97e2
(Test Method)Standard Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating Processes and Service Environments
Standard Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating Processes and Service Environments
SCOPE
1.1 This test method covers mechanical tests for the evaluation and control of the potential for hydrogen embrittlement that may arise from various sources of hydrogen as in plating processes, from fluids, cleaning treatments, maintenance chemicals, and gaseous environments that may contact the surface of steels.
1.2 The procedures and requirements are specified for five types of test specimens using a heat of AISI E4340 steel with demonstrated sensitivity. This test method is not intended to measure the relative susceptibility of other steels.
1.3 This test method assumes that AISI E4340 steel at 51HRC-54HRC, determined to be sensitive as specified in Table 1, is the worst case; that is, all other heat treated, high-hardness steels are less susceptible to hydrogen embrittlement.
1.4 For testing maintenance chemicals, the containment chamber must be isolated around the test specimen, as shown in Fig. 1 for Type 1a. If the test specimen and self-loading frame are to be immersed into the maintenance chemical, then the test fixture must be made from AISI E4340 steel except that it can be vacuum melted and heat treated to a lower hardness by tempering at 482 + 14°C (900 + 25°F) to a hardness of 40HRC-43HRC. This is done in order to minimize any polarization effects of galvanic coupling that would influence the test results.
1.5 Specimen geometries, equivalent loading conditions, and the pass/fail requirements for each type are also specified.
1.6 Classification -Hydrogen embrittlement tests can be performed with specimens as specified in the following:
1.6.1 Type 1-Notched:
1.6.1.1 Type 1a -Round bar, loaded in tension, under constant load.
1.6.1.2 Type 1b -Round bar, loaded in tension, with self-loading ring.
1.6.1.3 Type 1c -Round bar loaded in bending with self-loading frame.
1.6.1.4 Type 1d -C-rings loaded in bending with self-loading bolt.
1.6.2 Type 2 -Smooth (Unnotched).
1.6.2.1 Type 2a -Ring specimens loaded in bending with displacement bars.
1.7 This standard does not purport to address all of the safety problems, 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.
1.8 This test method is limited to hydrogen embrittlement testing of steels that are exposed to the following:
1.8.1 An electrochemical plating process.
1.8.2 Maintenance chemicals, subsequent to cadmium plate.
1.9 The values stated in acceptable metric units shall be regarded as the standard.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
e2
Designation: F 519 – 97
Standard Test Method for
Mechanical Hydrogen Embrittlement Evaluation of Plating
1
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Fig. A3.2 was editorially changed to Fig. A4.2 in December 1997.
2
e NOTE—Note 3 was deleted in Fig. A2.1 and Footnote 11 has been added to Note A3.1 in July 2000.
1. Scope 1.5.1 Annex A1 details notched tensile specimens under
constant load; Annex A2 details notched round bars tensile,
1.1 This test method covers mechanical tests for the evalu-
bend,andC-ringspecimensusingaself-loadingfixture;Annex
ation and control of the potential for hydrogen embrittlement
A3 details a notched four point bend specimen that combines
that may arise from various sources of hydrogen in plating
sustained load and slow strain rate testing for hydrogen
processes, or from subsequent service environments that in-
embrittlementbyusingincrementalloadsandholdtimesunder
clude fluids, cleaning treatments, maintenance chemicals or
displacement control to measure a threshold stress in an
gaseous environments that may contact the surface of steels.
accelerated manner. The test is described as an accelerated
1.2 This test method is intended for process control of
(#24 h) incrementally increasing or rising step load test
hydrogenproducedbydifferentplatingprocessesandexposure
method that measures the threshold for hydrogen stress crack-
to different chemicals encountered in a service environment
ing that is used to quantify the amount of residual hydrogen in
andnottomeasuretherelativesusceptibilityofdifferentsteels.
the specimen. Annex A4 details a smooth O-ring under
1.3 ThistestmethodassumesthatairmeltedAISI4340steel
displacement control; Annex A5 details testing in a service
per MIL-S-5000 at 51 to 53 HRC is the worst case; that is, all
environment.
other heat-treated, high-hardness steels are less susceptible to
1.6 Specificrequirementsforthetwotypesofspecimenand
hydrogenembrittlement.Thesensitivitytohydrogenembrittle-
the seven specific loading and geometrical configurations are
ment shall be demonstrated for each heat of AISI 4340 steel
as listed:
used in the manufacture of test specimens.
1.6.1 Type 1—Notched Specimens
1.4 Test procedures and acceptance requirements are speci-
1.6.2 Type 1a: Round Bar Tension—Constant Load
fied for seven specimens of different sizes, geometries, and
1.6.3 Type 1a.1—Standard Size Annex A1
loading configurations. For plating processes, notched speci-
1.6.4 Type 1a.2—Oversized Annex A1
mens must exceed 200 h at a sustained load of 75% of the
1.6.5 Type 1b: Round Bar Tension—Self Loading Fixture-
fracture stress or exceed a threshold of 75% of the fracture
Annex A2
stress for a quantitative, accelerated (#24 h) incrementally
1.6.6 Type 1c: Round Bar Bend—Self Loading Fixture-
increasing or rising step load (RSL) test. For service environ-
Annex A2
ments, equivalent loading conditions and pass/fail require-
1.6.7 Type 1d: C-ring Bend—Self Loading Fixture-
ments for each specimen are specified.
Annex A2
1.5 Thistestmethodisdividedintotwomainparts.Thefirst
1.6.8 Type 1e: Square Bar Bend—Displacement
part gives general information concerning requirements for
Annex A3
hydrogen embrittlement testing. The second part is composed
1.6.9 Type 2—Smooth Specimens
of annexes that give specific requirements for the seven
1.6.10 Type 2a: O-ring—Displacement Control
specimens covered by this test method.
Annex A4
1.7 The values stated are in American Standard units.
1.8 This standard does not purport to address all of the
1
This specification is under the jurisdiction of ASTM Committee F07 on
safety concerns, if any, associated with its use. It is the
Aerospace andAircraft and is the direct responsibility of Subcommittee F07.04 on
responsibility of the user of this standard to establish appro-
Hydrogen Embrittlement.
priate safety and health practices and determine the applica-
Current edition approved May 10, 1997. Published August 1997. Originally
published as F519–77. Last previous edition F519–93. bility of regulatory limitations prior to use.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
F 519
2. Referenced Documents plating. It is intended to be used as a qualification test for new
plating processes and as a periodic inspection audit for the
2.1 ASTM Standards:
control of a plating process.
B851 SpecificationforAutomatedControlledShotPe
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.