TM 1-1500-204-23-6 Table 4-7.  Identification of Magnesium Alloys Commercial designation Current DOW¹ ASTM² AMC³ specification Conditions Sheet and Plate FSI AX31A C52S QQ-M-44 O (Fully Annealed) H24 (Strain Hardened Partially Annealed) H26 (Strain Hardened Partially Annealed) AX31B O (Fully Annealed) H24 (Strain Hardened Partially Annealed) Rods, Bars, and Shapes JI AZ61A C57S QQ-M-31 As Extruded FSI AZ31B C52S QQ-M-31 As Extruded M MIA 3S QQ-M-31 As Extruded 01 AZ80A C58S QQ-M-31 As Extruded Tubing FSI AX31 A C52S WW-T-825 JI AZ61A C57S WW-T-825 M MIA 3S WW-T-825 Commercial designation Current DOW ASTM AMC specification Type Temper Castings H A263A 265 QQ-M-56 Sand AC (As Cast) HT (Heat-Treated and Aged) ACS (As Cast and Stabilized) HTS (Heat-Treated and Stabilized) M MIB 403 QQ-M-56 Sand AC C A292A 260 QQ-M-56 Sand AC HT HTA ACS HTS A291 QQ-M-56 Sand AC HT HTA See footnotes at end of table. 4-15