ASTM-A262 2013

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A262-13 Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

Published By	Publication Date	Number of Pages
ASTM	2013	17

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Categories: 77.140.20 - Stainless steels, ASTM

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Description

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),

1.1.2 Practice B Ferric SulfateSulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 8 to 14 , inclusive),

1.1.3 Practice C Nitric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 15 to 21 , inclusive),

1.1.4 Practice E CopperCopper SulfateSulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels (Sections 22 to 31 , inclusive), and

1.1.5 Practice F CopperCopper Sulfate50?% Sulfuric Acid Test for Detecting Susceptibility to Intergranular Attack in Molybdenum-Bearing Austenitic Stainless Steels (Sections 32 to 38 , inclusive).

1.2 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.

1.3 The ferric sulfatesulfuric acid test, the coppercopper sulfate50?% 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 coppercopper sulfate16?% sulfuric acid test is based on visual examination of bend specimens and, therefore, classifies the specimens only as acceptable or nonacceptable.

Note 1 See Appendix X1 for information regarding test selection.

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

1.5 This standard does not purport to address all of the safety problems, 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. (Specific precautionary statements are given in 5.6 , 11.1.1 , 11.1.9 , and 35.1 .)

Additional information

Standard Title	A262-13 Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
Published Code	ASTM
Publication Date	2013
Pages Count	17
ICS Codes	77.140.20 - Stainless steels

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ASTM-A262 2013

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