Stainless Steels1. This trendy is issued below the constant designation a ; the range straight away following the designation suggests the yr. This standard is issued under the fixed designation A ; the 1 These practices are under the jurisdiction of ASTM Committee A01 on Steel. Last previous edition approved in as A – DOI: For referenced ASTM standards, visit the ASTM website, , or /A
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See Table 1 for a listing of alloys for which Practice W is appropriate. NOTE 7—Conversion factors to other commonly used units for corrosion rates are as follows: In no case shall the specimen be bent over a smaller radius or through a greater angle than that speci? They should have three or four holes in them to increase circulation of the test solution around the specimen. For any studies of IGA on Types,orthe indicated test methods are suggested.
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ASTM A763 – 15
The test will not differentiate between intergranular attack resulting from carbides and that due to intermetallic phases. Types,and are nonstabilized grades that are generally not used in the as-welded or sensitized condition in other than mildly corrosive environments. NOTE 3—Loss of vapor results in concentration of the acid. Originally approved in Preparation of Test Specimens 4.
However, in the special case of surface carburization sometimes encountered, for instance, in tubing when carbonaceous lubricants are employed it may be possible by heavy grinding or machining to remove the carburized layer completely. It has been reported that violent boiling resulting in acid spills can occur.
A number in parentheses indicates the year of last reapproval. Active view current version of standard. Combinations of alloys and test methods for which successful experience is available are shown in Table. Supplementary requirements are noted as required.
Practice W is used as a screening test to avoid the necessity, for acceptable specimens, of more extensive testing required by Practices X, Y, and Z. Times for steels not listed in Table 1 are subject to agreement between the supplier and the purchaser.
Times for alloys not listed in Table 1 are subject to agreement between the supplier and the purchaser. During the test, ferric sulfate is consumed at a rate of 10 g for each 1 g of dissolved stainless steel.
Welded samples should be bent in such a manner that weld and the heat-affected zone are strained. In the annealed condition, they are not subject to intergranular corrosion. Gas evolved at the electrodes with entrained oxalic acid is poisonous and irritating.
A copper cradle may also be used. The choices are listed in Table 1.
ASTM A Sensitization Testing of Ferritic Stainless Steel
Different method of preparing steel test specimens are presented. A small amount of copper shot eight to ten pieces on the bottom of the? Subscription pricing is determined by: For specific safety precautionary statements, see 3. Application of these standard tests to the other ferritic stainless steels will be by specific agreement between producer and user.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. For detecting susceptibility in environments known to cause intergranular attack due to these phases, use Practice X.
Application of these standard tests to the other ferritic stainless steels will be by specific agreement between producer and user.
ASTM A() 铁素体不锈钢晶间腐蚀敏感性检测_百度文库
Application of these standard tests to the other ferritic stainless steels will be by speci? All traces of oxide scale formed during heat treatment must be removed. The copper should be washed and degreased before use. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Each sample must be in a separate cradle so that the samples do not touch.
All other microscopical examinations are of the corroded surface under binocular examination see Section