Prodsuct Description
2A11 aluminum is Al-Cu-Mg-based aluminum alloy，with high-strength hard aluminum， can be heat treatment to strengthen，quenching state with plastic medium， spot welding is good，after quenching and cold hardening with good cutting Performance ， often used anodizing treatment and surface coated with aluminum layer to improve its corrosion resistance， for the common military aluminum and aerospace aluminum.
Chemical composition
| Element | Si | Fe | Cu | Mn | Mg | Ni | Zn | Ti | Al |
| Content(％) | ≤0.07 | 0.7 | 3.8-4.8 | 0.4-1.0 | 0.4-0.8 | ≤0.1 | ≤0.3 | 0.15 | 90 |
Mechanical properties
| Aluminum Grade | Tensile Strength | Yield Strength | Elongation A (%) | Hardness/ HBWα |
| Rm/Mpa | Rp0.2/Mpa | |||
| 2A11 | 370 | 215 | 12 | 120 |
2A11 aluminum alloy mechanical properties
Tensile strength σb (MPA): ≥370
Conditions yield strength σ0.2 (MPA): ≥215
Elongation δ5 (%): ≥12
2A11 aluminum heat treatment specifications
1) Homogenization: Heat 480 ~ 495 ℃; holding 12 ~ 14h; furnace cooling.
2) Complete annealing: heating 390 ~ 430 ℃; holding time 30 ~ 120min; air cooling.
3) Rapid thermal annealing: heating 350 ~ 370 ℃; holding time of 30 ~ 120min; air cooling.
4) Quenching and aging: hardening 495 ~ 510 ℃, water cooling; artificial aging 155 ~ 165 ℃, 6 ~ 10h, air-cooled; natural aging: room 96h.
2A11 aluminum Features
2A11 aluminum is the first application of a hard aluminum, commonly referred to as a standard hard aluminum, with moderate intensity, at annealing, quenching and thermal state just plasticity is still good, can heat strengthened, used in the quenched and naturally aged condition, the point Welding is good, there is tendency to crack When welding and welding; aging can be cut in the quenched state is still good, bad in the annealed condition.
Prodsuct Application
2A11 aluminum sheet can be applied to aircraft structure parts of medium strength, propeller blades, transportation tools and building structure parts. Medium strength bolts and rivets of aircraft.