This standard covers magnesium tooling plate of one grade and quality offered for sale for use in jigs, fixtures, gauges and other applications.
Composition
Magnesium tooling plate is made to AZ31 composition shown in the Chemical Composition of Magnesium Tooling Plate table below. Tooling plate can be supplied to MIL-T-38749 on inquiry.
Chemical Composition of Magnesium Tooling Plate
| Alloy | Mg | Al | Ca | Mn | Ih | Zn | Zr | Cu max. | Fe max. | Ni max. | Si max. | Other imp. max. |
| AZ31 | Bal. | 2.5-3.5 | 0.04 max | 0.20 min. | - | 0.7-1.3 | - | 0.05 | 0.005 | 0.005 | 0.05 | 0.30 |
Properties
Typical mechanical properties os AZ31 tooling plate are shown in the table below. Minimum properties are not guaranteed.
| Thickness, inches | TS, ksi | TYS, ksi | Elong. in 2″, % | CYS, ksi |
| 0.250-6.000 | 35 | 19 | 10 | 10 |
Standard Sizes
| Thickness | Size |
| .250, .375 | 48″x 96″ | 48″x 144″- | - |
| .500, .625, .750, 1.000 | 48″x 96″ | 48″x 144″ | 60″x 144″ |
| 1.250, 1.500, 1.750 | 48″x 96″ | 48″x 144″ | 60″x 144″ |
| 2.000, 2.500, 3.000 | 48″x 96″ | 48″x 144″ | 60″x 144″ |
| 3.500 | 48″x 96″ | - | - |
| 4.000 | 49″x 84″ | - | - |
| 5.000 | 49″x 72″ | - | - |
| 6.000 | 49″x 60″ | - | - |
Special Inquiries: For thicknesses over 6 inches, widths over 60 inches, and non-standard lenghts.
Tolerances
Thickness
| Thickness – maximum variation in gauge within a plate ± 0.010 plate to plate variation |
| Specified thickness, inches | Tolerance ±, inches |
| 0.250-0.750 | 0.010 |
| 0.751-1.250 | 0.017 |
| 1.251-2.000 | 0.025 |
| 2.001-3.000 | 0.050 |
| 3.001-3.250 | 0.065 |
| 3.251-3.500 | 0.080 |
| 3.701-4.000 | 0.110 |
| 4.001-5.000 | 0.125 |
| 5.001-6.000 | 0.135 |
Width and Length Tolerances
Specified
thickness,
inches | Specified width of length, inch |
| Up thru 10 | Over 10 thru 48 | Over 48 thru 72 | Over 72 |
| Tolerances, inch + |
| 0.250-6.000 | 3/16 | 3/8 | 1/2 | 5/8 |
Flatness Tolerances
Specified
thickness,
inches | Deviation from flat*, inch |
| In any 1 foot | In any 6 feet |
| Guaranteed | Typical | Guaranteed | Typical |
0.250-1.000
1.001 | 0.005
0.010 | 0.003
0.005 | 0.015
0.020 | 0.007
0.010 |
* Deviations from flat are measured from a straight edge placed on the surface of the plate.
Finish: The side suitable for tooling uses is stencilled. The opposite side is equal or superior to a mill finish.
Packing: Conforms to requirements of carrier through which shipment is made. Both domestic and export packing available.
