ASTM B917/B917M-12(2020)

Annotation of standard text ASTM B917/B917M-12(2020) :

This practice covers the requirements for the heat treatment of aluminum alloy castings from any casting process such as investment casting, permanent mould casting, sand casting, and others. It excludes castings that are used in specific aerospace applications or those made from wrought aluminum alloys. The aluminum alloys should be subjected to controlled heat treatment using the usual air chamber furnace or other heating media like lead baths, oil baths, fluidized beds, or even superheated steam. Air chambers may be oil or gas fired or may also be electrically heated but the atmosphere inside each should be controlled to prevent porosity. Quenching is normally performed by immersing castings in a hot-water bath. It is important that the furnace be calibrated before it is used initially and after any change in the furnace. Likewise, temperature-measurement systems should be regularly checked for accuracy.


Keywords:
aluminum alloys, centrifugal casting, investment casting, permanent mold casting, precipitation heat treatment, rheocast casting, sand casting, solution heat treatment, squeeze casting, thixocast casting,, ICS Number Code 25.200 (Heat treatment),77.150.10 (Aluminium products)