2A16 aluminum alloy is a kind of heat-resistant hard aluminum. Its characteristics are: the strength is not too high at room temperature, but it has high creep strength at high temperature. The alloy has strong plasticity in the hot state and no extrusion. effect, can handle strengthening, spot welding, and seam welding have good welding performance, the tendency to form cracks is not obvious, the air tightness of the weld is still good, the corrosion stability of the weld is low, the corrosion stability of the aluminum-clad sheet is still good, and the extruded semi-finished product The corrosion resistance of steel is not high, in order to prevent corrosion, it should be protected by anodic oxidation treatment or painting: the machinability is still good. Mainly used for parts working at 250-350°C, such as bearings to compressor blades, discs, and plates, used as welding parts working at room temperature and high temperature, such as containers, airtight warehouses, etc.
[chemical composition] of 2A16 aluminum alloy
Silicon Si: 0.30
Magnesium Mg: 0.05
Zinc Zn: 0.10
Titanium Ti: 0.10-0.20
Aluminum Al: Balance
[mechanical properties] of 2A16 aluminum alloy
Tensile strength σb (MPa) ) ≥355
Conditional yield strength σ0.2 (MPa) )≥235
Heat treatment specifications:
1) Homogenization annealing: heating at 515-530°C; holding for 12-16 hours; furnace cooling.
2) Complete annealing: heating at 380-450°C; holding time 30-120min; air cooling.
3) Rapid annealing: heating at 350-370°C; holding time 30-120min; air cooling.
4) Quenching and aging: quenching at 530-540°C, water cooling; artificial aging (forgings, thin plates) at 160-170°C, 10-16h, air cooling; natural aging at room temperature is not limited.