3.2315 Aluminium
3.2315 aluminum is an aluminum alloy with aluminum-magnesium-silicon as the main alloying elements. It belongs to the German standard material and corresponds to the European standard EN AW-6082 or the AlMgSi1 designation.
3.2315 aluminum alloy, also known as EN AW-6082 or AlSi1MgMn, is a 6000 series forged alloy with magnesium and silicon as the primary alloying elements. Its typical chemical composition includes: 0.70–1.30% silicon, 0.60–1.20% magnesium, 0.40–1.00% manganese, as well as small amounts of copper, chromium, zinc, and titanium, with the balance being aluminum.
In the T6 temper condition, 3.2315 aluminum has a tensile strength of approximately 290 to 350 MPa, a yield strength of 240 to 260 MPa, and an elongation of about 7% to 10%. This alloy offers excellent corrosion resistance (including resistance to stress corrosion cracking), outstanding weldability, and good thermal conductivity. It is widely used in structural, marine engineering, transportation, and high-stress applications.
3.2315 is the designation of an aluminum casting alloy in the German DIN/Werkstoff numbering system. It corresponds to the European standard EN AC-42100 and is closely related to AA 356.0 in the Aluminum Association (AA) system of the United States. This alloy is renowned for its excellent castability, mechanical properties, and corrosion resistance.
3.2315 Aluminium Equivalent Grades
- Aluminium Association: AA-6082 .
- Others: H30 (German), A96082 (UNS)
- EN: AC-42100
- AA: 356.0 (similar composition; U.S. standard).
- DIN/ISO: 3.2315 (Werkstoff number).
Common Product Forms of 3.2315 Aluminium
Includes aluminum plates (thickness 1–450 mm), aluminum bars (diameter 5–500 mm), aluminum tubes, and custom profiles
| Product Form | Description |
| Aluminum Plate (Thickness 1–450 mm) | 3.2315 aluminum plates are widely used in aerospace, automotive mold, and high-strength structural components due to their excellent machinability, high strength, and good heat treatment response. Thickness ranges from 1 mm to 450 mm, meeting various load-bearing and structural design requirements. They are commonly used for machined parts, mold base plates, fixtures, and bracket manufacturing. |
| Aluminum Bar (Diameter 5–500 mm) | 3.2315 aluminum bars are often used for manufacturing high-precision parts due to their outstanding mechanical and processing properties, such as aerospace fasteners, automotive structural rods, and industrial shafts. Available in a wide range of diameters from 5 mm to 500 mm, they are suitable for CNC turning, milling, drilling, and other machining methods, offering a balance of strength and wear resistance. |
| Aluminum Tube | 3.2315 aluminum tubes offer excellent strength and lightweight characteristics, suitable for structural piping systems requiring high strength and corrosion resistance, such as aircraft hydraulic systems, automotive suspension structures, or industrial frameworks. Inner and outer diameters and wall thicknesses can be customized according to design requirements. They provide good weldability and surface treatment capabilities. |
| Custom Profile | 3.2315 custom profiles can be formed into complex cross-sectional structural parts through custom extrusion dies. They are widely used in aircraft components, rail transit parts, and mechanical guide systems. The advantages include meeting lightweight design needs while ensuring good mechanical strength and structural rigidity, especially suitable for designs involving special connections or nesting structures. |
Material Characteristics of 3.2315 Aluminium
- High Strength: Among the 6000 series aluminum alloys, it offers the highest combined strength, which can be further enhanced through heat treatments (such as T6, T651 conditions), making it suitable for high-load applications.
- Corrosion Resistance and Workability: Offers excellent corrosion resistance in environments such as seawater and saltwater, along with outstanding formability (e.g., can be bent 90° without cracking) and weldability, making it suitable for precision machining.
- Thermal and Electrical Conductivity: Its high thermal conductivity makes it an ideal material for heat dissipation components in semiconductor equipment, molds, and other applications.
3.2315 Aluminium Chemical Composition
Chemical composition of 3.2315 (EN AW-6082) in mass % (rest Al):
| Element | Range (%) |
| Si | 0.70 – 1.30 |
| Mg | 0.60 – 1.20 |
| Mn | 0.40 – 1.00 |
| Fe | ≤ 0.50 |
| Cu | ≤ 0.10 |
| Cr | ≤ 0.25 |
| Zn | ≤ 0.20 |
| Ti | ≤ 0.10 |
| Others (each) | ≤ 0.05 |
| Others (total) | ≤ 0.15 |
3.2315 Aluminium Physical Properties
- Density: ≈ 2.70 g/cm³ .
- Melting Range: 555 °C .
- Modulus of Elasticity: ~ 70 GPa .
- Thermal Conductivity: 170–180 W/m·K .
- Thermal Expansion: ~ 23–24 ×10⁻⁶ /K .
3.2315 Aluminium Mechanical Properties
Typical values for T6/T651 temper
| Property | Value |
| Ultimate Tensile Strength | 290–350 MPa |
| Yield Strength (0.2 % Rp₀.₂) | 240–260 MPa |
| Elongation at Break | 7 %–10 % |
| Hardness (Brinell) | 89–94 HB |
3.2315 Aluminium Heat Treatment and Processing
Common tempers: H30 (strain hardened), T6, T651, H116 (resistant to exfoliation corrosion).
- Forming: Processed through rolling, extrusion, forging, stamping, etc.; not used for casting.
- Work hardening: Not suitable for significant cold working; strengthening is achieved through solution heat treatment and artificial aging (e.g., T6).
Processing Methods
- Casting: Suitable for sand casting, permanent mold casting, and investment casting.
- Welding: TIG or MIG welding is applicable; preheating may be required.
- Surface treatment: Anodizing or coating to enhance corrosion resistance.
Corrosion Resistance
- Exhibits excellent general corrosion resistance in atmospheric and marine environments.
- Offers higher resistance to stress corrosion cracking compared to other 6000 series alloys.
3.2315 Aluminium Applications
- Aerospace: Non-critical structural components requiring high strength and corrosion resistance.
- Structural components: Scaffolding, trusses, railway carriages, bridges, cranes.
- Offshore and container: Platforms, containers, pressure vessels.
- Transportation and automotive: Frames, wheels, structural parts, engine blocks, cylinder heads, and brackets.
- Industrial: Valves, gears, and investment cast parts.
- Mold manufacturing: Injection molds, blow molds, rubber molds, and tooling jigs, offering both wear resistance and high-temperature stability.
- Electronics and machinery: Precision components, high thermal conductivity parts (such as heat sinks), and architectural structural parts.
3.2315 Aluminium Standards and Specifications
- EN 573-3: Chemical composition and forms of wrought products.
- EN 485-2, EN 755-2, EN 754-2: Mechanical properties of plate, extruded, and drawn products.
- ISO 6361: Wrought alloy plate, strip, and sheet.
3.2315 Aluminium Advantages
- Balanced strength, lightweight, and corrosion resistance.
- Suitable for casting complex geometries.
- Cost-effective, ideal for large-scale production.