ASTM G49-85(2019)

Standard Practice for Preparation and Use of Direct Tension Stress-Corrosion Test Specimens

SIGNIFICANCE AND USE
4.1 Axially loaded tension specimens provide one of the most versatile methods of performing a stress-corrosion test because of the flexibility permitted in the choice of type and size of test specimen, stressing procedures, and range of stress levels.  
4.2 The uniaxial stress system is simple; hence, this test method is often used for studies of stress-corrosion mechanisms. This type of test is amenable to the simultaneous exposure of unstressed specimens (no applied load) with stressed specimens and subsequent tension testing to distinguish between the effects of true stress corrosion and mechanical overload (2). Additional considerations in regard to the significance of the test results and their interpretation are given in Sections 6 and 10.  
4.3 Wide variations in test results may be obtained for a given material and specimen orientation with different specimen sizes and stressing procedures. This consideration is significant especially in the standardization of a test procedure for interlaboratory comparisons or quality control.
SCOPE
1.1 This practice covers procedures for designing, preparing, and using ASTM standard tension test specimens for investigating susceptibility to stress-corrosion cracking. Axially loaded specimens may be stressed quantitatively with equipment for application of either a constant load, constant strain, or with a continuously increasing strain.  
1.2 Tension test specimens are adaptable for testing a wide variety of product forms as well as parts joined by welding, riveting, or various other methods.  
1.3 The exposure of specimens in a corrosive environment is treated only briefly because other standards are being prepared to deal with this aspect. Meanwhile, the investigator is referred to Practices G35, G36, G37, and G44, and to ASTM Special Technical Publication 425 (1).2  
1.4 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.  
1.5 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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2019
• ICS: 77.060 - Corrosion of metals
• Technical Committee: G01 - Corrosion of Metals
• Drafting Committee: G01.06 - Environmentally Assisted Cracking

Relations

• Replaced By: ASTM G49-85(2023)e1 - Standard Practice for Preparation and Use of Direct Tension Stress-Corrosion Test Specimens
• Effective Date: 01-Nov-2023
• Refers: ASTM G36-94(2018) - Standard Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boiling Magnesium Chloride Solution
• Effective Date: 01-Oct-2018
• Refers: ASTM E8/E8M-16 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 15-Jul-2016
• Refers: ASTM E8/E8M-15 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Feb-2015
• Refers: ASTM E8/E8M-13 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Jun-2013
• Refers: ASTM G36-94(2013) - Standard Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boiling Magnesium Chloride Solution
• Effective Date: 01-May-2013
• Refers: ASTM E8/E8M-11 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Dec-2011
• Refers: ASTM G37-98(2011) - Standard Practice for Use of Mattsson's Solution of pH 7.2 to Evaluate the Stress- Corrosion Cracking Susceptibility of Copper-Zinc Alloys
• Effective Date: 01-Feb-2011
• Refers: ASTM G35-98(2010) - Standard Practice for Determining the Susceptibility of Stainless Steels and Related Nickel-Chromium-Iron Alloys to Stress-Corrosion Cracking in Polythionic Acids
• Effective Date: 01-Sep-2010
• Refers: ASTM G36-94(2006) - Standard Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boiling Magnesium Chloride Solution
• Effective Date: 01-Nov-2006
• Refers: ASTM G44-99(2005) - Standard Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5% Sodium Chloride Solution
• Effective Date: 01-May-2005
• Refers: ASTM G37-98(2004) - Standard Practice for Use of Mattsson's Solution of pH 7.2 to Evaluate the Stress- Corrosion Cracking Susceptibility of Copper-Zinc Alloys
• Effective Date: 01-May-2004
• Refers: ASTM G35-98(2004) - Standard Practice for Determining the Susceptibility of Stainless Steels and Related Nickel-Chromium-Iron Alloys to Stress-Corrosion Cracking in Polythionic Acids
• Effective Date: 01-May-2004
• Refers: ASTM G36-94(2000) - Standard Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boiling Magnesium Chloride Solution
• Effective Date: 10-May-2000
• Refers: ASTM G44-99 - Standard Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5% Sodium Chloride Solution
• Effective Date: 10-Dec-1999

Standards Content (Sample)

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.
Designation: G49 − 85 (Reapproved 2019)
Standard Practice for
Preparation and Use of Direct Tension Stress-Corrosion
1
Test Specimens
ThisstandardisissuedunderthefixeddesignationG49;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope G35 Practice for Determining the Susceptibility of Stainless
Steels and Related Nickel-Chromium-Iron Alloys to
1.1 This practice covers procedures for designing,
Stress-Corrosion Cracking in Polythionic Acids
preparing,andusingASTMstandardtensiontestspecimensfor
G36 Practice for Evaluating Stress-Corrosion-Cracking Re-
investigating susceptibility to stress-corrosion cracking. Axi-
sistance of Metals and Alloys in a Boiling Magnesium
ally loaded specimens may be stressed quantitatively with
Chloride Solution
equipment for application of either a constant load, constant
G37 Practice for Use of Mattsson’s Solution of pH 7.2 to
strain, or with a continuously increasing strain.
Evaluate the Stress-Corrosion Cracking Susceptibility of
1.2 Tension test specimens are adaptable for testing a wide
Copper-Zinc Alloys
variety of product forms as well as parts joined by welding,
G44 PracticeforExposureofMetalsandAlloysbyAlternate
riveting, or various other methods.
Immersion in Neutral 3.5 % Sodium Chloride Solution
1.3 The exposure of specimens in a corrosive environment
3. Summary of Practice
is treated only briefly because other standards are being
prepared to deal with this aspect. Meanwhile, the investigator 3.1 This practice covers the use of axially loaded, quantita-
is referred to Practices G35, G36, G37, and G44, and toASTM
tively stressed ASTM standard tension test specimens for
2
Special Technical Publication 425 (1). investigating the resistance to stress-corrosion cracking of
metallic materials in all types of product forms. Consideration
1.4 This standard does not purport to address all of the
is given to important factors in the selection of appropriate
safety concerns, if any, associated with its use. It is the
specimens, the design of loading equipment, and the effects of
responsibility of the user of this standard to establish appro-
these factors on the state of stress in the specimen as corrosion
priate safety, health, and environmental practices and deter-
occurs.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
4. Significance and Use
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.1 Axially loaded tension specimens provide one of the
most versatile methods of performing a stress-corrosion test
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical because of the flexibility permitted in the choice of type and
size of test specimen, stressing procedures, and range of stress
Barriers to Trade (TBT) Committee.
levels.
2. Referenced Documents
4.2 The uniaxial stress system is simple; hence, this test
3
2.1 ASTM Standards:
method is often used for studies of stress-corrosion mecha-
E8/E8M Test Methods for Tension Testing of Metallic Ma-
nisms. This type of test is amenable to the simultaneous
terials
exposure of unstressed specimens (no applied load) with
stressed specimens and subsequent tension testing to distin-
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion
guish between the effects of true stress corrosion and mechani-
of Metals and is the direct responsibility of Subcommittee G01.06 on Environmen-
cal overload (2). Additional considerations in regard to the
tally Assisted Cracking.
significance of the test results and their interpretation are given
Current edition approved Nov. 1, 2019. Published November 2019. Originally
approved in 1976. Last previous edition approved in 2011 as G49–85 (2011). DOI:
in Sections 6 and 10.
10.1520/G0049–85R19.
2
4.3 Wide variations in test results may be obtained for a
The boldface numbers in parentheses refer to a list of references at the end of
this standard.
given material and specimen orientation with different speci-
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
men sizes and stressing procedures. This consideration is
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
significant especially in the standardization of a test procedure
Standards volume information, refer to the standard’s Document
...

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: G49 − 85 (Reapproved 2019)
Standard Practice for
Preparation and Use of Direct Tension Stress-Corrosion
1
Test Specimens
This standard is issued under the fixed designation G49; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope G35 Practice for Determining the Susceptibility of Stainless
Steels and Related Nickel-Chromium-Iron Alloys to
1.1 This practice covers procedures for designing,
Stress-Corrosion Cracking in Polythionic Acids
preparing, and using ASTM standard tension test specimens for
G36 Practice for Evaluating Stress-Corrosion-Cracking Re-
investigating susceptibility to stress-corrosion cracking. Axi-
sistance of Metals and Alloys in a Boiling Magnesium
ally loaded specimens may be stressed quantitatively with
Chloride Solution
equipment for application of either a constant load, constant
G37 Practice for Use of Mattsson’s Solution of pH 7.2 to
strain, or with a continuously increasing strain.
Evaluate the Stress-Corrosion Cracking Susceptibility of
1.2 Tension test specimens are adaptable for testing a wide
Copper-Zinc Alloys
variety of product forms as well as parts joined by welding,
G44 Practice for Exposure of Metals and Alloys by Alternate
riveting, or various other methods.
Immersion in Neutral 3.5 % Sodium Chloride Solution
1.3 The exposure of specimens in a corrosive environment
3. Summary of Practice
is treated only briefly because other standards are being
prepared to deal with this aspect. Meanwhile, the investigator
3.1 This practice covers the use of axially loaded, quantita-
is referred to Practices G35, G36, G37, and G44, and to ASTM tively stressed ASTM standard tension test specimens for
2
Special Technical Publication 425 (1).
investigating the resistance to stress-corrosion cracking of
metallic materials in all types of product forms. Consideration
1.4 This standard does not purport to address all of the
is given to important factors in the selection of appropriate
safety concerns, if any, associated with its use. It is the
specimens, the design of loading equipment, and the effects of
responsibility of the user of this standard to establish appro-
these factors on the state of stress in the specimen as corrosion
priate safety, health, and environmental practices and deter-
occurs.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
4. Significance and Use
dance with internationally recognized principles on standard-
4.1 Axially loaded tension specimens provide one of the
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- most versatile methods of performing a stress-corrosion test
because of the flexibility permitted in the choice of type and
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. size of test specimen, stressing procedures, and range of stress
levels.
2. Referenced Documents
4.2 The uniaxial stress system is simple; hence, this test
3
2.1 ASTM Standards:
method is often used for studies of stress-corrosion mecha-
E8/E8M Test Methods for Tension Testing of Metallic Ma-
nisms. This type of test is amenable to the simultaneous
terials
exposure of unstressed specimens (no applied load) with
stressed specimens and subsequent tension testing to distin-
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion
guish between the effects of true stress corrosion and mechani-
of Metals and is the direct responsibility of Subcommittee G01.06 on Environmen-
cal overload (2). Additional considerations in regard to the
tally Assisted Cracking.
significance of the test results and their interpretation are given
Current edition approved Nov. 1, 2019. Published November 2019. Originally
approved in 1976. Last previous edition approved in 2011 as G49–85 (2011). DOI:
in Sections 6 and 10.
10.1520/G0049–85R19.
2
4.3 Wide variations in test results may be obtained for a
The boldface numbers in parentheses refer to a list of references at the end of
this standard.
given material and specimen orientation with different speci-
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
men sizes and stressing procedures. This consideration is
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
significant especially in the standardization of a test procedure
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. for interlaboratory comparisons or quality control.
Copyright © ASTM Interna
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: G49 − 85 (Reapproved 2011) G49 − 85 (Reapproved 2019)
Standard Practice for
Preparation and Use of Direct Tension Stress-Corrosion
1
Test Specimens
This standard is issued under the fixed designation G49; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers procedures for designing, preparing, and using ASTM standard tension test specimens for investigating
susceptibility to stress-corrosion cracking. Axially loaded specimens may be stressed quantitatively with equipment for application
of either a constant load, constant strain, or with a continuously increasing strain.
1.2 Tension test specimens are adaptable for testing a wide variety of product forms as well as parts joined by welding, riveting,
or various other methods.
1.3 The exposure of specimens in a corrosive environment is treated only briefly because other standards are being prepared
to deal with this aspect. Meanwhile, the investigator is referred to Practices G35, G36, G37, and G44, and to ASTM Special
2
Technical Publication 425 (1).
1.4 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.
1.5 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.
2. Referenced Documents
3
2.1 ASTM Standards:
E8E8/E8M Test Methods for Tension Testing of Metallic Materials [Metric] E0008_E0008M
G35 Practice for Determining the Susceptibility of Stainless Steels and Related Nickel-Chromium-Iron Alloys to Stress-
Corrosion Cracking in Polythionic Acids
G36 Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boiling Magnesium Chloride
Solution
G37 Practice for Use of Mattsson’s Solution of pH 7.2 to Evaluate the Stress-Corrosion Cracking Susceptibility of Copper-Zinc
Alloys
G44 Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5 % Sodium Chloride Solution
3. Summary of Practice
3.1 This practice covers the use of axially loaded, quantitatively stressed ASTM standard tension test specimens for
investigating the resistance to stress-corrosion cracking of metallic materials in all types of product forms. Consideration is given
to important factors in the selection of appropriate specimens, the design of loading equipment, and the effects of these factors on
the state of stress in the specimen as corrosion occurs.
4. Significance and Use
4.1 Axially loaded tension specimens provide one of the most versatile methods of performing a stress-corrosion test because
of the flexibility permitted in the choice of type and size of test specimen, stressing procedures, and range of stress levels.
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion of Metals and is the direct responsibility of Subcommittee G01.06 on Environmentally
Assisted Cracking.
Current edition approved March 1, 2011Nov. 1, 2019. Published April 2011November 2019. Originally approved in 1976. Last previous edition approved in 20052011
as G49–85(2005).G49–85 (2011). DOI: 10.1520/G0049-85R11.10.1520/G0049–85R19.
2
The boldface numbers in parentheses refer to a list of references at the end of this standard.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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G49 − 85 (2019)
4.2 The uniaxial stress system is simple; hence, this test method is often used for studies of stress-corrosion mechanisms. This
type of test is amenable to the simultaneous exposure of unstressed specimens (no applied load) with stressed specimens and
subseq
...