ASTM International - ASTM G30-97(2009)

Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens

historical
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Organization: ASTM International
Publication Date: 1 May 2009
Status: historical
Page Count: 7
ICS Code (Corrosion of metals): 77.060
significance And Use:

The U-bend specimen may be used for any metal alloy sufficiently ductile to be formed into the U-shape without mechanically cracking. The specimen is most easily made from strip or sheet but can... View More

scope:

1.1 This practice covers procedures for making and using U-bend specimens for the evaluation of stress-corrosion cracking in metals. The U-bend specimen is generally a rectangular strip which is bent 180° around a predetermined radius and maintained in this constant strain condition during the stress-corrosion test. Bends slightly less than or greater than 180° are sometimes used. Typical U-bend configurations showing several different methods of maintaining the applied stress are shown in Fig. 1.

1.2 U-bend specimens usually contain both elastic and plastic strain. In some cases (for example, very thin sheet or small diameter wire) it is possible to form a U-bend and produce only elastic strain. However, bent-beam (Practice G 39 or direct tension (Practice G 49)) specimens are normally used to study stress-corrosion cracking of strip or sheet under elastic strain only.

1.3 This practice is concerned only with the test specimen and not the environmental aspects of stress-corrosion testing which are discussed elsewhere (1) and in Practices G 35, G 36, G 37, G 41, G 44, G 103 and Test Method G 123.

1.4 The values stated in SI units are to be regarded as standard. The inch-pound units in parentheses are provided for information.

1.5 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.


FIG. 1 Typical Stressed U-bends

Document History

May 1, 2016
Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
1.1 This practice covers procedures for making and using U-bend specimens for the evaluation of stress-corrosion cracking in metals. The U-bend specimen is generally a rectangular strip which is bent...
November 1, 2015
Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
1.1 This practice covers procedures for making and using U-bend specimens for the evaluation of stress-corrosion cracking in metals. The U-bend specimen is generally a rectangular strip which is bent...
ASTM G30-97(2009)
May 1, 2009
Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
1.1 This practice covers procedures for making and using U-bend specimens for the evaluation of stress-corrosion cracking in metals. The U-bend specimen is generally a rectangular strip which is bent...
April 10, 1997
Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
1.1 This practice describes procedures for making and using U-bend specimens for the evaluation of stress-corrosion cracking in metals. The U-bend specimen is generally a rectangular strip which is...
April 10, 1997
Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
1.1 This practice describes procedures for making and using U-bend specimens for the evaluation of stress-corrosion cracking in metals. The U-bend specimen is generally a rectangular strip which is...
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