3A21 Solid Aluminum Bar Mill Aluminium Extruded Bar 3mm 5mm 8mm

3A21 Solid Aluminum Bar 3mm 5mm 8mm Extruded Aluminum Rod Bars

3A21 Aluminum Bar Characteristics:

Rustproof aluminum, good corrosion resistance, good weldability.

3A21 aluminum bar is Al-Mn alloy, 3A21 aluminum bar is a kind of antirust aluminum widely used, low strength (only slightly higher than industrial pure aluminum).

Non-heat treatment hardening. Cold machining is often used to improve its mechanical properties. It has high plasticity in annealing, good plasticity in semi-cold hardening, low plasticity in cold hardening, good corrosion resistance, good weldability and bad machinability.

3A21 Aluminum Bar Chemical Composition (%):

3A21 Aluminum Bar Mechanical Properties:

3A21 Aluminum Bar Features:

1. Good Plasticity: The plasticity of 3A21 aluminum alloy is very high in the annealing state, good in the case of semi-cold hardening, and low in the case of cold hardening.

2. Excellent Corrosion Resistance: The 3A21 aluminum bar is close to the corrosion resistance of industrial pure aluminum, has good corrosion resistance to atmosphere, fresh water, seawater and some acids, etc.

3. Good Weldability: The 3A21 aluminum bar has good spot welding, gas welding, argon arc welding and other welding effects.

4. Mechanical Properties: The 3A21 aluminum bar tensile strength σb (MPa) is 120-160, conditional yield strength σ0.2 (MPa)≥8, elongation δ10≤2%.

3A21 Aluminum Bar Heat Treatment:

1) Homogenization annealing: 510 ~ 520 ℃; Heat preservation for 4-6h; Air cooling.

2) Rapid annealing: 350-410 ℃; With the different effective thickness of the material, the holding time is 30-120 min; Air or water cooled.

3) High temperature annealing: 350-500 ℃; When the thickness of the finished product is more than or equal to 6 mm, the heat preservation time is 10-30 min, and when the thickness is less than or equal to 6 mm, the heat penetration is complete; Air cooling.

4) Low temperature annealing: 250-300 ℃; The heat preservation time is 1-3 H; Air or water cooled.

3A21 Aluminum Bar Usages:
3A21 is mainly used for high plasticity and good weldability, such as aerospace, military equipment, automobiles, transportation, fixtures, welding parts such as skin, production of propellant tanks, end frame and bracket of structure cabin, as well as conduit working in corrosive.
In addition, for use under conditions of higher strength than 1 series alloy. Such as food/chemical products processing and storage equipment, kitchen utensils, brazed plate-type heat exchanger, transport tank of liquid products, thin plate for all kinds of pressure vessels and pipe, cosmetic board, insulation equipment, photocopying machine drum, marine tread plate.