ASTM G30-22
Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens

Standard No.

ASTM G30-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM G30-22

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 that is bent 180° around a predetermined radius and maintained in this constant strain condition during the stresscorrosion 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 G39 or direct tension (Practice G49)) 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)2 and in Practices G35, G36, G37, G41, G44, G103 and Test Method G123. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM G30-22 Referenced Document

• ASTM E3 Standard Practice for Preparation of Metallographic Specimens
• ASTM G1 Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens
• ASTM G103 Standard Practice for Evaluating Stress-Corrosion Cracking Resistance of Low Copper 7XXX Series Al-Zn-Mg-Cu Alloys in Boiling 6 % Sodium Chloride Solution*， 2023-01-15 Update
• ASTM G123 Standard Test Method for Evaluating Stress-Corrosion Cracking of Stainless Alloys with Different Nickel Content in Boiling Acidified Sodium Chloride Solution*， 2022-10-01 Update
• ASTM G193 Standard Terminology and Acronyms Relating to Corrosion*， 2022-08-01 Update
• ASTM G35 Standard Practice for Determining the Susceptibility of Stainless Steels and Related Nickel-Chromium-Iron Alloys to Stress-Corrosion Cracking in Polythionic Acids
• ASTM G36 Standard Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boiling Magnesium Chloride Solution
• ASTM G37 Standard Practice for Use of Mattsson's Solution of pH 7.2 to Evaluate the Stress-Corrosion Cracking Susceptibility of Copper-Zinc Alloys
• ASTM G39 Standard Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test Specimens
• ASTM G41 Standard Practice for Determining Cracking Susceptibility of Metals Exposed Under Stress to a Hot Salt Environment
• ASTM G44 Standard Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5?% Sodium Chloride Solution
• ASTM G49 Standard Practice for Preparation and Use of Direct Tension Stress-Corrosion Test Specimens*， 2023-11-01 Update

ASTM G30-22 history

• 2022 ASTM G30-22 Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
• 1997 ASTM G30-97(2016) Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
• 1997 ASTM G30-97(2015) Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
• 1997 ASTM G30-97(2009) Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
• 1997 ASTM G30-97(2003) Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens
• 1997 ASTM G30-97 Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens