2A11 Aluminum Plate

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:

Al	Si	Cu	Mg	Zn	Mn	Ti	Ni	Fe	Fe + Ni
balance	≤0.7	3.8 - 4.8	0.40～0.8	≤ 0.30	0.40 - 0.8	≤ 0.15	≤ 0.10	0-0.7	0-0.7

Note: single: ≤ 0.05; total: ≤ 0.10

Mechanical properties:

Tensile strength σb (MPA): ≥370

Yield strength σ0.2 (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.