This standard specifies the grading principles and rating methods for the deterioration of cast aluminum-silicon alloys. This standard is applicable to the evaluation of the metallographic structure of cast aluminum-silicon alloys modified by sodium and phosphorus.
JB/T 7946.1-1999 history
2017JB/T 7946.1-2017 Metallograph of cast aluminium alloys.Cast aluminium-silicon alloys-Modification
1999JB/T 7946.1-1999 Metallograph of cast aluminium alloys.Cast aluminium-silicon alloys-Modification