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ASTM G64-99(2021)
Standard Classification of Resistance to Stress-Corrosion Cracking of Heat-Treatable Aluminum Alloys
Přeložit název
NORMA vydána dne 1.8.2021
Informace o normě:
Označení normy: ASTM G64-99(2021)
Datum vydání normy: 1.8.2021
Kód zboží: NS-1031494
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM G64-99(2021) :
Keywords:
alphabetical stress–corrosion ratings, heat–treatable aluminum alloys, laboratory corrosion tests, practical interpretation of ratings, service experience, stress-corrosion tracking,, ICS Number Code 77.120.10 (Aluminium and aluminium alloys)
Doplňující informace
| Significance and Use | ||||
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4.1?This classification involves alphabetical ratings intended only to provide a qualitative guide for materials selection. The ratings are based primarily on the results of standard corrosion tests. 4.2?Interpretations of the SCC ratings in terms of typical problem areas including service experience are given in Table 1. Practical experience has shown that SCC problems with aluminum alloys generally have involved situations where the direction and magnitude of the tensile stresses resulting from manufacturing or use, or both, of the material were not recognized. 4.3?A
list of the SCC ratings for the heat-treatable aluminum alloy
products is given in Table 2.
Revisions to the table will be required as new materials become
available and additional test results are accumulated.
L
Longitudinal: parallel to direction of principal metal extension
during manufacture of the product.
LTLong Transverse: perpendicular to direction of principal metal extension. In products whose grain structure clearly shows directionality (width-to-thickness ratio greater than two) it is that perpendicular direction parallel to the major grain dimension. STShort Transverse: perpendicular to direction of principal metal extension and parallel to minor dimension of grains in products with significant grain directionality. 4.4?These alphabetical ratings are not
suitable for direct use in mathematical models for material
selection, but numerical weights and confidence factors can be
devised on the basis of experience and judgment of the materials
engineer.1.1?This
classification covers alphabetical ratings of the relative
resistance to SCC of various mill product forms of the wrought
2XXX, 6XXX, and 7XXX series heat-treated aluminum alloys and the
procedure for determining the ratings.
1.2?The ratings do not apply to metal in which the metallurgical structure has been altered by welding, forming, or other fabrication processes. 1.3?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. 1.4?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. |
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| 2. Referenced Documents | ||||
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