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ASTM A262

Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

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Organization: ASTM
Publication Date: 1 September 2015
Status: active
Page Count: 20
ICS Code (Stainless steels): 77.140.20
scope:

These practices cover the following five tests:

Practice A-Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 4 to 13, inclusive),

Practice B-Ferric Sulfate-Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 14 to 25, inclusive),

Practice C-Nitric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 26 to 36, inclusive),

Practice E-Copper-Copper Sulfate-Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 37 to 46, inclusive), and 

Practice F-Copper-Copper Sulfate-50 % Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Molybdenum-Bearing Austenitic Stainless Steels (Sections 47 to 58, inclusive). 

The Oxalic Acid Etch Test is a rapid method of identifying, by simple etching, those specimens of certain stainless steel grades that are essentially free of susceptibility to intergranular attack associated with chromium carbide precipitates. These specimens will have low corrosion rates in certain corrosion tests and therefore can be eliminated (screened) from testing as "acceptable." The etch test is applicable only to those grades listed in the individual hot acid tests and classifies the specimens either as "acceptable" or as "suspect." 

The ferric sulfate-sulfuric acid test, the copper-copper sulfate-50 % sulfuric acid test, and the nitric acid test are based on weight loss determinations and, thus, provide a quantitative measure of the relative performance of specimens evaluated. In contrast, the copper-copper sulfate-16 % sulfuric acid test is based on visual examination of bend specimens and, therefore, classifies the specimens only as acceptable or nonacceptable.

The presence or absence of intergranular attack in these tests is not necessarily a measure of the performance of the material in other corrosive environments. These tests do not provide a basis for predicting resistance to forms of corrosion other than intergranular, such as general corrosion, pitting, or stress-corrosion cracking.

NOTE 1-See Appendix X1 for information regarding test selection. 

The values stated in SI units are to be regarded as standard. The inch-pound equivalents are in parentheses and may be approximate.

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. Some specific hazards statements are given in 10.1, 20.1.1, 20.1.9, 31.3, 34.4, 53.1.1, and 53.1.10.

*A Summary of Changes section appears at the end of this standard

Document History

ASTM A262
September 1, 2015
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A—Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 4 to 13, inclusive), Practice...
July 1, 2014
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A—Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 4 to 13, inclusive), Practice...
May 1, 2013
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A-Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B-Ferric...
April 1, 2010
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A—Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B—Ferric...
November 10, 2002
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
(Footnote *) These practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive),...
November 10, 2002
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B -...
November 10, 2002
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
(Footnote *) These practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive),...
November 10, 2002
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A—Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B—Ferric...
November 10, 2002
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
(Footnote *) These practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive),...
June 10, 2002
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B -...
September 10, 2001
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
Scope These practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B...
November 10, 1998
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
1. Scope 1.1 These practices cover the following five tests: 1.1.1 Practice A--Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive),...
December 15, 1993
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A description is not available for this item.
July 15, 1993
STANDARD PRACTICES FOR DETECTING SUSCEPTIBILITY TO INTERGRANULAR ATTACK IN AUSTENITIC STAINLESS STEELS
A description is not available for this item.
December 15, 1991
STANDARD PRACTICES FOR DETECTING SUSCEPTIBILITY TO INTERGRANULAR ATTACK IN AUSTENITIC STAINLESS STEELS
A description is not available for this item.
December 28, 1990
STANDARD PRACTICES FOR DETECTING SUSCEPTIBILITY TO INTERGRANULAR ATTACK IN AUSTENITIC STAINLESS STEELS
A description is not available for this item.
August 29, 1986
STANDARD PRACTICES FOR DETECTING SUSCEPTIBILITY TO INTERGRANULAR ATTACK IN AUSTENITIC STAINLESS STEELS
A description is not available for this item.
October 25, 1985
STANDARD PRACTICES FOR DETECTING SUSCEPTIBILITY TO INTERGRANULAR ATTACK IN AUSTENITIC STAINLESS STEELS
A description is not available for this item.
March 29, 1985
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A-Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B-Ferric...
July 31, 1981
Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
These practices cover the following five tests: Practice A-Oxalic Acid Etch Test for Classification of Etch Structures of Austenilic Stainless Steels (Sections 2 to 6, incl), Practice B- Ferric...
July 27, 1979
Standard Recommended Practices for DETECTING SUSCEPTIBILITY TO INTERGRANULAR ATTACK IN STAINLESS STEELS
These recommended practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Stainless Steels (Sections 2 to 6, incl), Practice B - Ferric...
August 26, 1977
Standard Recommended Practices for Detecting Susceptibility to Intergranular Attack in Stainless Steels
These recommended practices cover the following five tests: Practice A-Oxalic Acid Etch Test for Clauification of Etch Structures of Stainless Steels (Sections 2 to 6, incl), Practice B - Ferric...
July 28, 1970
Standard Recommended Practices for Detecting Susceptibility to Intergranular Attack in Stainless Steels
These practices cover the following five tests: Practice A - Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels (Sections 3 to 7, inclusive), Practice B -...

References

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