ASTM G36 PDF
Presented in this report are the results of stress corrosion cracking testing per ASTM G36 (Standard Practice for Performing Stress-Corrosion Cracking Tests in a. austenitic stainless steel was studied in accordance with the ASTM G The samples were unidirectional cold-rolled up to 60 and 90 percent reduction in. Revised ASTM G36 apparatus. This client had been testing stress corrosion- cracking in metal welds by clamping a QVF 2″ glass pipe fitting to his samples.
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Etching both sections did not reveal any additional crack depth as sometimes occurs in metallographic studies of stress-corrosion cracking. No preparation other than deburring and degreasing was performed on the test specimens prior to testing. This leads to the possibility of confusing stress-corrosion failures with mechanical failures induced by corrosion-reduced net cross sections.
ASTM G36 – 94(2013)
It is a method for detecting the effects of composition, heat treatment, surface finish, microstructure, and stress on the susceptibility of these materials to chloride stress corrosion cracking. Link to Active This link will always route to the current Active version of the standard. Cracking of both test specimens was observed, and the tests were terminated. Although this test may be performed using various concentrations of magnesium chloride, this procedure covers a test solution held at a constant boiling temperature of Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Deepest cracks found on transverse cross-section of finned tube.
Quality Assurance Return to Corrosion Testing. Black lines indicate the approximate location of the outer surface of the tube. Regular examination periods for test specimen cracking were scheduled. Circumferential cracking of the bare tube test specimen was apparent within the first 8 hours of testing even while satm test specimen was on test.
CTL-ASTM G36 – STRESS CORROSION CRACKING in a BOILING MAGNESIUM CHLORIDE SOLUTION
Crack characteristics were investigated by preparing metallographic sections of the test specimens. See Section 7 for specific safety precautions. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The boiling points of aqueous magnesium chloride solutions at one atmosphere pressure as a function of concentration are shown graphically in Fig. Link to Active This link will always route to the current Active version of f36 standard. However, such correlations may not always be possible.
Materials that normally provide acceptable resistance in hot chloride service may crack in this test. 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. The boiling points of aqueous magnesium chloride solutions at one atmosphere pressure as a function of concentration are shown graphically in Fig. Test procedures conformed to zstm referenced ASTM test method. Microphotographs of the deepest cracks found on the mounted sections are shown in Figures 3 and 4.
On the finned test specimen, cracks extended down the fins from the outer edge to the tube wall in a direction roughly normal to the tube wall; at the tube wall the cracks extended in a short arc both longitudinally and circumferentially, the arcs stopping before the next fin was encountered. This danger is particularly great when small cross section samples, high applied stress awtm, long exposure periods, stress-corrosion resistant alloys, or a combination thereof are being used.
The weld and HAZ of the finned tube appeared to asym more cracks than the base metal, and the cracks appear to nearly connect from fin to fin.
Historical Version s – view previous versions of standard. Return to Corrosion Testing. Careful examination is recommended for correct diagnosis of the cause of failure.
Deepest crack found on longitudinal cross-section of bare tube. See Section 7 for specific safety precautions. Photographs of typical appearance of the cracks on both tubes are ashm in Figures 1 and 2.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Two 2 1-foot long pieces of 0.
Revised ASTM G36 apparatus
Newark, Delaware USA Although this test may be qstm using various concentrations of magnesium chloride, this procedure covers a test solution held at a constant boiling temperature atm Accompanying paperwork states that both types of tube were fabricated from the same heat lot of material.
Circumferential cracks with connecting longitudinal crack in base metal of bare tube. The test specimens were immersed in the boiling solution and supported using the suggested ladder-back cradles. The test may not be relevant to stress-corrosion cracking in polythionic acid or caustic environments.