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NACE - TM0177

Laboratory Testing of Metals for Resistance to Specific Forms of Environmental Cracking in H2S Environments

inactive
Organization: NACE
Publication Date: 23 December 1996
Status: inactive
Page Count: 36
scope:

This standard covers the testing of metals subjected to tensile stresses for resistance to cracking failure in low-pH aqueous environments containing H2S. Carbon and low-alloy steels are commonly tested for EC resistance at room temperature where SSC susceptibility is typically high. For other types of alloys the correlation of EC susceptibility with temperature is more complicated.

This standard describes the reagents, test specimens, and equipment to use, discusses base material and test specimen properties, and specifies the test procedures to follow. This standard describes four test methods:

Method A - Standard Tensile Test

Method B - Standard Bent-Beam Test

Method C - Standard C-Ring Test

Method D - Standard Double-Cantilever-Beam (DCB) Test

Sections 1 through 7 of this standard give general comments that apply to all four test methods. Sections 8 through 11 indicate the test method to follow for each type of test specimen. General guidelines to help to determine the aptness of each test method are given at the beginning of each test method description (Sections 8 through 11). Reporting of the test results is also discussed.

Metals can be tested for resistance to EC at temperatures and pressures that are either ambient (atmospheric) or elevated.

For testing at ambient conditions, the test procedures can be summarized as follows: Stressed test specimens are immersed in acidified aqueous environments containing H2S. Applied loads at convenient increments can be used to obtain EC data.

For testing at temperatures higher than 27°C (80°F), at either atmospheric or elevated pressure, Section 7 describes an alternative test technique. All methods (A, B, C, and D) are adaptable to this technique.

Safety Precautions: H2S is an extremely toxic gas that must be handled with care. (See Appendix A.)

Document History

April 18, 2016
Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking in H2S Environments
Section 1: General This standard covers the testing of metals subjected to tensile stresses for resistance to cracking failure in low-pH aqueous environments containing H2S. Carbon and low-alloy...
December 3, 2005
Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking in H2S Environments
General This standard covers the testing of metals subjected to tensile stresses for resistance to cracking failure in low-pH aqueous environments containing H2S. Carbon and low-alloy steels are...
December 23, 1996
Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking in H2S Environments
A description is not available for this item.
TM0177
December 23, 1996
Laboratory Testing of Metals for Resistance to Specific Forms of Environmental Cracking in H2S Environments
This standard covers the testing of metals subjected to tensile stresses for resistance to cracking failure in low-pH aqueous environments containing H2S. Carbon and low-alloy steels are commonly...
January 1, 1996
Laboratory Testing of Metals for Resistance to Specific Forms of Environmental Cracking in H2S Environments
General This standard covers the testing of metals subjected to tensile stresses for resistance to cracking failure in low-pH aqueous environments containing H2S. Carbon and lowalloy steels are...
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