Introduction to 2A11 Aluminum Plate:
2A11 aluminum plate is the earliest kind of hard aluminum, generally called standard hard aluminum, which is based on the Al-Cu system and incorporates a small amount of elements such as Mg, Mn, and Cr. And it use in quenching and natural aging conditions, when using 2A11 as solder for gas welding and argon arc welding have a tendency to crack; aluminum plate has good stability, corrosion resistance is not high without aluminum, and there is a tendency to cause intergranular corrosion when heated above 100 °C.
2A11 Aluminum alloy chemical composition:
Aluminum Al: allowance
Si Si: 0.7 or less
Copper Cu: 3.8 to 4.8
Mg: 0.40 ~ 0.8
Zinc and zinc: 0.30 or less
Mn: 0.40 ~ 0.8
Ti Ti: 0.15 or less
Ni Ni: 0.10 or less
Iron Fe: 0.000 ~ 0.700
Fe+Ni Fe+Ni: 0.000 ~ 0.700
Note: Single :≤0.05; Total: 0.10 or less
2A11 aluminum alloy mechanical properties:
Tensile strength σ B (MPA) : ≥370
Conditional yield strength σ0.2 (MPA) : ≥215
Elongation δ5 (%) : ≥12
Note: Longitudinal mechanical properties of bar at room temperature
Sample size: bar diameter (square bar, hexagonal bar inner circle diameter)≤150
2A11 aluminum Features and Scope:
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.
2A11 aluminum alloy mechanical properties:
Tensile strength σb (MPA): ≥370
Conditions yield strength σ0.2 (MPA): ≥215
Elongation δ5 (%): ≥12
Note: The vertical bar at room temperature mechanical properties
Sample size: bar diameter (square bar, hexagon bar inscribed circle diameter) ≤150
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 Status: aluminum and aluminum alloy extruded bars (≤150mm, H112, T4 state).
Use of 2A11 aluminum plate:
1.General mechanical parts or structures such as textile, structural parts of vehicles and other means of transport.
2.Aircraft medium strength components, aircraft propeller blades,
traffic and building components.
3.Ship’s precision instruments.
4.Friction couplings, tools, measuring tools and other components.
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