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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Materials that normally provide acceptable resistance in hot chloride service may crack in this test.
Active view current version of standard. Both test specimens were taken off test at 8 hours for examination at low magnification.
Newark, Delaware USA Microphotographs of the deepest cracks found on the mounted sections are shown in Figures 3 and 4. Adtm 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. See Section 7 for specific safety precautions. Regular examination periods for test specimen cracking were scheduled.
Stress Corrosion Cracking Testing: ASTM G36, G37, G, & G
However, such correlations may not always be possible. Deepest crack found on longitudinal cross-section of bare tube. Quality Assurance Atsm to Corrosion Testing. Return to Corrosion Testing. The boiling points of aqueous magnesium chloride solutions at one atmosphere pressure as a function of concentration are shown graphically in Fig.
ASTM G36 – 94(2013)
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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 The weld and HAZ of the finned tube appeared to have more cracks than the base ashm, and the cracks appear to nearly connect f36 fin to fin. Accompanying paperwork states that both types of tube were fabricated from the same heat lot of material.
Careful examination is recommended for correct diagnosis of the cause of failure.
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 This leads to the possibility of confusing stress-corrosion failures with mechanical failures induced by corrosion-reduced net cross sections.
Crack characteristics were investigated by preparing metallographic sections of the test specimens. Historical Astj s – view previous versions of standard.
Circumferential cracking of the bare tube test specimen was apparent within the first adtm hours of testing even while the test specimen was on test.
Link to Active This link will always route to the current Active version of the standard. Link to Active This link will always route zstm the current Active version of the standard. No preparation other than deburring and degreasing was performed on the test specimens prior to testing. Black lines indicate the approximate location of the outer surface of the tube.
Etching both sections did not reveal any additional crack depth as sometimes occurs in metallographic studies of stress-corrosion cracking. 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 h36 to use.
It is a method for detecting the effects astk composition, heat treatment, surface finish, microstructure, and stress on the susceptibility of these materials to chloride stress corrosion cracking.
This danger is particularly great when small cross section samples, high applied stress levels, long exposure periods, stress-corrosion resistant alloys, or a combination thereof are being used. A suggested test apparatus capable of maintaining solution concentration and temperature within the prescribed limits for extended periods of time axtm also described herein.
Circumferential cracks with connecting longitudinal crack in base metal of bare tube. 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.
CTL-ASTM G36 – STRESS CORROSION CRACKING in a BOILING MAGNESIUM CHLORIDE SOLUTION
The boiling points of aqueous magnesium chloride solutions at one atmosphere pressure as a function of concentration are shown graphically in Fig. Two 2 1-foot long pieces of 0. Test procedures conformed to the referenced ASTM test method.