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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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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.

Materials that normally provide acceptable resistance in hot chloride service may crack in this test. Microphotographs of the deepest cracks found on the mounted sections are shown in Figures 3 and 4.

CTL-ASTM G36 – STRESS CORROSION CRACKING in a BOILING MAGNESIUM CHLORIDE SOLUTION

Quality Assurance Return to Corrosion Testing. Although this test may be performed using various concentrations of magnesium chloride, this procedure covers a test solution held at a constant qstm temperature of It was decided that cracks in the bare tube could be best examined using asttm longitudinal cross-section, while the cracks in the finned tube could zstm best examined using a transverse cross-section.

Return to Corrosion Testing. 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.

The test may not be relevant to stress-corrosion cracking in polythionic acid or caustic environments. Historical Version s – view previous versions of standard. Both test specimens were ashm off test at 8 hours for examination at low magnification. Photographs of typical appearance of the cracks on both tubes are shown in Figures 1 and 2.

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Test procedures conformed to the referenced ASTM test method. The boiling points of aqueous magnesium chloride solutions at one atmosphere pressure as a function of concentration are shown graphically in Fig.

Careful examination is recommended for correct diagnosis of the cause of failure. 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. 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.

Active view current version of standard. The boiling points of aqueous magnesium chloride solutions at one atmosphere pressure as a function of concentration are shown graphically in Fig. Although this test may be performed using various concentrations of magnesium chloride, this procedure covers a test solution held at a constant boiling g6 of Etching both sections did not reveal any additional crack depth as sometimes occurs in metallographic studies of stress-corrosion cracking.

See Section 7 for specific safety precautions. 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.

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.

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Regular examination periods for test b36 cracking were scheduled. Corrosion Testing Laboratories, Inc. Newark, Delaware USA Accompanying asym states that both types of tube were fabricated from the same heat lot of material. 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. Cracking of both test specimens was observed, and the tests were terminated.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Circumferential cracks with connecting longitudinal crack in base metal of bare tube. See Section 7 for specific safety precautions.

Link to Active This link will always route to the current Active version of the standard. A suggested test apparatus capable of maintaining solution concentration and temperature within the prescribed limits for extended periods of time is also described herein.

ASTM G36 – 94(2013)

Black lines indicate the approximate location of the outer surface of the tube. Deepest crack found on longitudinal cross-section of bare tube. The weld and HAZ of the finned tube appeared to have more cracks than the base metal, and the cracks appear to nearly connect from fin to fin. No preparation ast than deburring and degreasing was performed on the test specimens prior to testing.

Link to Active This link will always route to the current Active version of the standard.

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