Temper Types
Alloy QQ-A-225/9 is supplied in a range of tempers:
- T7351
- T651
Properties
Chemical Composition
Alloy QQ A 225/9
SAE AMS QQ-A-225/9
Chemical Element | % Present |
---|---|
Silicon (Si) | 0.00 - 0.40 |
Iron (Fe) | 0.00 - 0.50 |
Copper (Cu) | 1.20 - 2.00 |
Manganese (Mn) | 0.00 - 0.30 |
Chromium (Cr) | 0.18 - 0.28 |
Magnesium (Mg) | 2.10 - 2.90 |
Zinc (Zn) | 5.10 - 6.10 |
Titanium (Ti) | 0.00 - 0.20 |
Other (Each) | 0.00 - 0.05 |
Others (Total) | 0.00 - 0.15 |
Aluminium (Al) | Balance |
Mechanical Properties
Bar 12.7mm to 101.6mm
SAE AMS QQ-A-225/9
Mechanical Property | Value |
---|---|
Proof Stress | 455 Min MPa |
Tensile Strength | 531 Min MPa |
Elongation A50 mm | 7 Min % |
General Physical Properties
Physical Property | Value |
---|---|
Density | 2.81 g/cm³ |
Melting Point | 635 °C |
Thermal Expansion | 23.5 x 10-6/K |
Modulus of Elasticity | 72 GPa |
Thermal Conductivity | 134-160 W/m.K |
Electrical Resistivity | 40 % IACS |
Applications
- Aerosoace components
- Defence components
- High technology applications
Characteristics
- High strength
- Very good machinability
- Very good weldability (resistance, spoy & beam)
- Fair resistance to atmospheric corrosion