ASTM G 58 Standard Practice for Preparation of Stress-Corrosion Test Specimens for Weldments
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ASTM G 58 Document Information:
Title
Standard Practice for Preparation of Stress-Corrosion Test Specimens for Weldments
ASTM International
Publication Date:
Jun 28, 1985
Scope:
This practice covers procedures for the making and utilization of test
specimens for the evaluation
of weldments in stress-corrosion cracking (SCC) environments.
Test specimens are described in which (a) stresses are developed by
the welding process only, (b)
stresses are developed by an externally applied load in addition to
the stresses due to welding,
and (c) stresses are developed by an externally applied load only with
residual welding stresses
removed by annealing.
This practice is concerned only with the welded test specimen and not
with the environmental
aspects of stress-corrosion testing. Specific practices for the
bending and loading of test
specimens, as well as the stress considerations involved in
preparation of C-rings, U-bend,
bent-beam, and tension specimens are discussed in other ASTM
standards.
The actual stress in test specimens removed from weldments is not
precisely known because it
depends upon the level of residual stress from the welding operation
combined with the applied
stress. A method for determining the magnitude and direction of
residual stress which may be
applicable to weldment is described in Test Method E 837. The
reproducibility of test results is
highly dependent on the preparation of the weldment, the type of test
specimen tested, and the
evaluation criteria used. Sufficient replication should be employed to
determine the level of
inherent variability in the specific test results that is consistent
with the objectives of the
test program.
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. (For more
specific safety hazard information, see Section 7.)
Keywords:
- elastic
- precracked specimens
- plastic strain
- residual stresses
- smooth specimens
- stress-corrosion cracking
- weld heat-affected zone
- welding considerations
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