2017A Aluminum alloy,Aluminum 2017A alloy,E FORU

### **2017A Aluminum Alloy Product Introduction** **Overview** 2017A Aluminum Alloy is a high-strength, heat-treatable aluminum-copper-magnesium alloy. It is a modern, controlled version of the classic 2017 alloy, offering improved consistency and properties. As one of the first widely used duralumin-type alloys, it is known for achieving high strength through natural aging after solution heat treatment (T4 temper). Its key characteristic is its excellent **machinability in the T4 condition**, making it a preferred choice for high-strength, precision-machined components. However, its corrosion resistance is relatively low, and it is not recommended for welding. --- #### **1. Chemical Composition (Typical Weight %)** The chemical composition of 2017A Aluminum Alloy is tightly controlled under international standards. | Element | Minimum (%) | Maximum (%) | Notes | | :--- | :--- | :--- | :--- | | **Aluminum (Al)** | Balance | Balance | - | | **Copper (Cu)** | 3.5 | 4.5 | Primary strengthening element (forms CuAl₂ precipitates) | | **Magnesium (Mg)** | 0.40 | 1.0 | Secondary strengthening element | | **Manganese (Mn)** | 0.40 | 1.0 | Controls grain structure and improves strength | | **Silicon (Si)** | 0.20 | 0.8 | Impurity, but contributes to strength | | **Iron (Fe)** | - | 0.7 | Impurity | | **Zinc (Zn)** | - | 0.25 | Impurity | | **Chromium (Cr)** | - | 0.10 | Impurity | | **Others (Each)** | - | 0.05 | - | | **Others (Total)** | - | 0.15 | - | **Key Point:** The high Copper content is the primary source of strength but also reduces corrosion resistance compared to other series like 6xxx. The absence of lead (Pb) distinguishes it from free-machining alloys like 2011 or 2016, but it still maintains very good machinability. --- #### **2. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.79 g/cm³ (0.101 lb/in³) | | **Melting Range** | ~ 510°C - 640°C (950°F - 1185°F) | | **Electrical Conductivity** | ~ 34-40% IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ~ 134 W/m·K | | **Coefficient of Thermal Expansion** | ~ 23.6 x 10⁻⁶/°C (20-100°C) | --- #### **3. Mechanical Properties (Typical for T4 Temper)** 2017A is most commonly used in the T4 temper (solution heat-treated and naturally aged). The T4 condition offers an excellent combination of high strength and good machinability. | Temper | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (% in 50mm) | Hardness | | :--- | :--- | :--- | :--- | :--- | | **2017A-T4** | min. 345 MPa (50 ksi) | min. 215 MPa (31 ksi) | min. 12-15% | ~ 105 HB | *Note: Properties can vary slightly based on the form (bar, sheet, wire) and exact processing conditions. Artificial aging (T6 temper) can be applied but is less common.* --- #### **4. International Standards** 2017A Aluminum Alloy is recognized under several major international standards systems. The "A" suffix often denotes a tighter control on impurities. | Standard System | Alloy Designation | Common Tempers | | :--- | :--- | :--- | | **ISO** | **AlCu4MgSi(A)** | T4 | | **ASTM (USA)** | **2017** (Note: 2017A is more common in Europe) | T4, T451 | | **EN (Europe)** | **EN AW-2017A** | T4 | | **UNS (USA)** | **A92017** | - | | **JIS (Japan)** | **A2017** | T4 | --- #### **5. Product Applications** 2017A is predominantly used in applications requiring high strength and good machinability, particularly in the aerospace and general engineering sectors. * **Aerospace Industry:** * Rivets (historically very important) * Screw machine products * Aircraft fittings * Structural components subject to moderate stresses * **Automotive and Transportation:** * High-strength bolts and fasteners * Drive shafts and gears * Suspension components * **General Engineering and Machinery:** * Gears and pinions * Valve parts * Pump components * Various high-strength, machined parts * **Hardware:** * Camera bodies and components * High-performance sporting goods --- #### **6. Key Advantages & Considerations** * **Advantages:** * **High Strength:** Offers one of the highest strengths among aluminum alloys in the naturally aged (T4) condition. * **Excellent Machinability:** In the T4 temper, it machines exceptionally well, producing a good surface finish. * **Good Strength-to-Weight Ratio.** * **Considerations:** * **Poor Corrosion Resistance:** The high copper content makes it very susceptible to corrosion, particularly in saltwater environments. It almost always requires a protective coating, such as **Alclad** (a thin layer of pure aluminum or a corrosion-resistant alloy rolled onto the surface) or anodizing. * **Not Weldable:** It is generally considered non-weldable by fusion welding techniques due to its high susceptibility to solidification cracking and loss of properties in the heat-affected zone. * **Natural Aging:** After solution heat treatment, it continues to age at room temperature, which can lead to slight dimensional changes over time for very tight-tolerance parts. **Conclusion** 2017A Aluminum Alloy is a classic high-strength structural alloy whose modern formulation provides reliable performance. Its primary advantage lies in its ability to be precision-machined to a high-strength state without the need for artificial aging. While its poor corrosion resistance requires careful consideration for the final application, it remains a vital material in aerospace and other high-performance engineering fields where its specific combination of strength and machinability is required.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1524 gallon liquid totes Special package is available on request.