ASME BPVC 2239-1 pdf download Case 2239-1 Use of Permanent Mold Cast Aluminum Alloys UNS A13560 and A03570 Section VIII, Division 1
Inquiry: May aluminum alloys UNS A13560 and A03570 in the overaged temper meeting the chemical composition and mechanical properties given in Tables 1 and 2 and other requirements of SB-108 be used in Section VIII, Division 1 construction
Reply: It is the opinion ofthe Committee that aluminum alloys UNS A13560 and A03570 as described in the above Inquiry may be used in Section VIII, Division 1 construction of pressure vessels, up to 300°F under the following conditions:
(a) The maximum allowable stress values for the materials shall be those given in Table 3.
(b) Welding is not permitted.
(c) External pressure applications are not permitted.
(d) Applicable parts of Section VIII, Division 1 that shall apply are those given in Part UNF.
(e) The castings shall be heat treated. The heat treatment shall be 980°F for 8 hours, followed by a water quench, then 440°F for 7.5 hours.
(f) This Case number shall be shown on the data report and the marking of the material.