2A11 aluminum alloy physical properties / chemical composition / product specifications material application profile:
Material Name: 2A11 Aluminum Alloy Standard: GB/T 3191-1998
Features and scope of application:
2A11 aluminum alloy is the earliest hard aluminum, generally called standard hard aluminum, with medium strength. It has good plasticity in annealing, quenching and hot state. It can be heat-treated and strengthened. It can be used in quenching and natural aging conditions. The weldability is good, and there is a tendency to crack when performing gas welding and argon arc welding; the cutting is good in the quenching aging state and is poor in the annealing state.
chemical composition:
Aluminum Al: balance
Silicon Si: ≤0.7
Copper Cu: 3.8 to 4.8
Magnesium Mg : 0.40～0.8
Zinc Zn : ≤ 0.30
Manganese Mn : 0.40 to 0.8
Titanium Ti : ≤ 0.15
Nickel Ni : ≤ 0.10
Iron Fe : 0.000~0.700
Iron + nickel Fe + Ni : 0.000 ~ 0.700 Note: single: ≤ 0.05; total: ≤ 0.10
Mechanical properties:
Tensile strength &;b (MPA): ≥370
Yield strength &;0.2 (MPA): ≥215
Elongation δ5 (%): ≥12 Note: Longitudinal mechanical properties of bar at room temperature
Heat treatment specification:
- 1) Homogenization annealing: heating 480 ~ 495 ° C; holding 12 ~ 14h; furnace cooling.
- 2) Complete annealing: heating 390 ~ 430 ° C; holding time 30 ~ 120min; air cooling.
- 3) Rapid annealing: heating 350 ~ 370 ° C; holding time is 30 ~ 120min; air cooling.
- 4) Quenching and aging: quenching 495 ~ 510 ° C, water cooling; artificial aging 155 ~ 165 ° C, 6 ~ 10h, air cooling; natural aging: room temperature 96h.
