Aluminium Magnesium Tooling Plate

APPLICATIONS
Sheet and plate in AZ31B find application in medium strength service at temperatures below 150°C. Diverse uses including aerospace, aircraft, concrete tools, 3C (cell phone / camera / computer), speaker cones and textile machinery can all benefit from light weight AZ31B.
AZ31B is non-magnetic and has high electrical and thermal conductivity filling the requirements for RFI and EMI shielding in the electronics and computer industries.
Superplastic forming of AZ31B sheet at elevated temperatures allows production of a wide variety of intricate parts for automotive uses. Monocoque construction utilizing formed sheet can be adapted to many commercial applications.
SPECIFICATIONS
- ASTM B90/B90M-07
- AMS 4375
- AMS 4376
- AMS 4377
CHEMICAL COMPOSITION
- Al: 2.5-3.5%
- Zn: 0.7-1.3%
- Mn: 0.20 1.0%
- Mg: Balance
PHYSICAL PROPERTIES
- Density: 1.78
- Coefficient of thermal expansion: 26.8 x 10-6K-1
- Specific heat: 1040 Jkg-1k-1
- Thermal conductivity: 76.9Wm-1k-1
- Electrical resistivity: 92nm
- Modulus of elasticity: 45 x 109Pa
- Poissons ratio: 0.35
- Melting range: 566 - 632°C
HEAT TREATMENT
No thermal treatment is available for increasing the strength of this alloy after fabrication.
MECHANICAL PROPERTIES
Alloy and Temper | Thickness (mm) | Yield Strength 0.2% offset (MPa) | Tensile strength (MPa) | Elongation In 5.65 (%) |
AZ31B-O | 0.5- 1.5 | 125 | 221 | 10 |
1.5 - 6.3 | 105 | 221 | 9 | |
6.3 - 75 | 105 | 221 | 8 | |
AZ31B-H24 | 0.5 - 6.3 | 200 | 269 | 5 |
6.3 -9.5 | 179 | 262 | 7 | |
9.5 -12.7 | 165 | 255 | 8 | |
12.7 - 25 | 152 | 248 | 8 | |
25- 50 | 138 | 234 | 6 | |
50 - 80 | 124 | 234 | 7 | |
AZ31B-H26 | 6.3 - 10 | 186 | 269 | 6 |
10 - 12.5 | 179 | 262 | 6 | |
12.5 - 20 | 172 | 255 | 5 | |
20 - 25 | 159 | 255 | 5 | |
25 - 40 | 152 | 241 | 5 | |
40 - 50 | 148 | 241 | 5 |
The sheet and plate shall conform to the tensile requirements in above Table unless other agreement is made between seller and purchaser. Mechanical Properties for sizes and tempers not shown in above Table shall be as agreed upon by seller and purchaser.
OTHER PROPERTIES
- Typical Hardness
- O temper: 67 Rockwell E
- H24 temper: 83 Rockwell E
WELDABILITY
Excellent weldability with gas shielded arc using AZ61A (preferred) or AZ92A filler rod; post weld stress relief is required to prevent stress corrosion cracking. Resistance welding is excellent.