Find the most up-to-date version of ASTM A at Engineering Find the most up-to-date version of ASTM A/AM at Engineering ASTM A Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure Retaining Parts for Corrosive

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A — 05 Standard Speci? A number in parentheses indicates the year of last reapproval. A z990 epsilon e indicates an editorial change since the last revision or reapproval.

Since these grades possess varying degrees of suitability for service in corrosive environments, it is the responsibility of the purchaser to determine which grade shall be furnished. Selection will depend on design and service conditions, mechanical properties, and corrosion-resistant characteristics.

ASTM A 全文-调研报告-在线文档

Within the text, the SI units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this a990 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.

Current edition approved March 1, Originally approved in Last previous edition approved in as A — Also includes scrapped machinery and fabricated items, chips, and turnings. General Conditions for Delivery 4. Failure to comply with the general requirements of Speci? In case of con? Such requirements may include, but are not limited to, the following: Dimensional tolerances should be included on the casting drawing. Class D will be supplied unless otherwise a90 Process and Manufacture 6.


An analysis of every heat is required.

Test results shall conform to the tensile requirements speci? The bar shall be solution heat treated per the requirements of Table 4 in production furnaces to the same procedure as the castings it represents. If the casting grade does not require heat treatment, the bar used for the test specimen shall not be heat treated. A As-cast Quench in water or rapid cool by other means as agreed upon by the manufacturer and purchaser.

Classes A, B, C, and D are de? Each class imposes speci? Fusion discontinuities, expansion discontinuities, and inserts are unacceptable. All other surface features must meet the acceptance criteria class in Table 2.

If the second casting passes, then no additional radiography beyond the normal amount is required. If that second casting fails, all remaining castings shall be radiographed in only the rejectable areas found on the? Repair by Welding Initial excavation of defects may be accomplished by any method including air-arc gouging, grinding, or machining; however, all visible traces of the air-arc process shall be removed by grinding or machining.

All surfaces to be welded and at least 1 in. The cleaning may be accomplished by grinding or by machining followed by solvent washing.


Workmanship, Finish, and Appearance Final cleaning shall be accomplished by blasting with clean nonmetallic media not previously used on steel or iron parts, pickling, machining, or other approved methods approved by the purchaser. The distinguishing requirements of this speci? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

ASTM A990/A990M – 18

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments asmt invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Your comments will receive careful consideration at a meeting of the x990 technical committee, which you may attend. 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.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.