ASTM A990 PDF

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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The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. As the voice of the U. This specification covers iron-nickel-chromium and nickel alloy castings specially processed with restricted melt practices, weldability testing, and nondestructive examination NDE requirements for use in pressure retaining parts with asgm service environments.

Current edition approved March 1, Your comments are invited either for revision of this standard or for additional xstm and should be addressed to ASTM International Headquarters.

The choice a90 manufacturing procedure to be used for producing the alloy castings shall be according to specified metallic contents. 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.

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Combining values from the two systems may result in non-conformance with the standard. Repair by Welding Add to Alert PDF.

Nondestructive examination requirements such as casting thickness shall be evaluated by visual, radiographic, and liquid penetrant inspection. Failure to comply with the general requirements of Speci? Within the text, the SI units are shown in parentheses.

ASTM A 全文-调研报告-在线文档

Dimensional tolerances should be included on the casting drawing. Your Alert Profile aatm the documents that will be monitored. Since these grades possess varying degrees of suitability for service atm corrosive environments, it is the responsibility of the purchaser to determine which grade shall be furnished. This standard is also available to be included in Standards Subscriptions.

Reference Radiographs for Heavy-Walled to in. Fusion discontinuities, expansion discontinuities, and inserts are unacceptable. If the second casting passes, then no additional radiography beyond the normal amount is required. Classes A, B, C, and D are de?

ASTM A990/A990M – 18

Selection will Chromium-Nickel, Corrosion-Resistant, for Severe Ser- vice2 depend on design and service conditions, mechanical proper- ties, and corrosion-resistant characteristics. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

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E Reference Radiographs for Heavy-Walled 2 to in.

Also includes scrapped machinery and fabricated items, chips, and turnings. Combining values from the two systems may result in nonconformance with this speci? Within the text, the SI units are shown in brackets or parentheses. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? The distinguishing require- ments of this specification are as follows.

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An analysis of every heat is required. Fusion disconti- manufacturer and purchaser. ASTM International takes no position respecting the validity asgm any patent rights asserted in connection with any item mentioned in this standard.

Within the text, the SI units are shown in brackets or parentheses.

asfm If the casting grade does not require heat treatment, the bar used for the test specimen shall not be heat treated. The choice of manufacturing procedure to be used for producing the alloy castings shall be according to specified metallic contents. Originally approved in

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