3130 Aluminum alloy,Aluminum 3130 alloy,E FORU

### **Product Introduction: Aluminum 3130 Alloy** **Overview** Aluminum 3130 Alloy is a non-heat-treatable aluminum alloy specifically designed for excellent machinability. It is part of a family of free-machining alloys, similar to 3110, but with a distinct chemical composition that enhances its performance in automatic screw machines and CNC machining applications. The key characteristic of 3130 is the addition of Bismuth (Bi), which, often in combination with other low-melting-point elements, promotes superior chip-breaking and a fine surface finish. This makes it an ideal choice for high-volume production of complex, precision parts where machining efficiency and surface quality are paramount. --- ### **1. Chemical Composition (Typical Weight %)** The composition of 3130 alloy is optimized for machinability, utilizing bismuth as a key component. | Element | Content (%) | | :--- | :--- | | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 0.50 - 0.9 | | **Iron (Fe)** | ≤ 0.7 | | **Copper (Cu)** | 0.20 - 0.6 | | **Manganese (Mn)** | 0.10 - 0.4 | | **Magnesium (Mg)** | 0.40 - 0.7 | | **Zinc (Zn)** | ≤ 0.20 | | **Bismuth (Bi)** | 0.20 - 0.5 | | **Others (Each)** | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | *Note: The use of Bismuth (Bi) instead of Lead (Pb) makes this alloy a more environmentally friendly or "green" free-machining alternative, addressing restrictions like RoHS in certain applications.* --- ### **2. Physical Properties** 3130 Aluminum exhibits physical properties suitable for its primary role as a machining stock. | Property | Value / Description | | :--- | :--- | | **Density** | ~2.74 g/cm³ (0.099 lb/in³) | | **Melting Range** | ~ 595 - 650 °C (~ 1100 - 1200 °F) | | **Electrical Conductivity** | ~ 45-50% IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ~ 170 - 190 W/m·K | | **Coefficient of Thermal Expansion** | ~ 23.2 x 10⁻⁶/°C (at 20-100°C) | | **Modulus of Elasticity** | ~ 70 GPa (10,000 ksi) | --- ### **3. Mechanical Properties (Typical for T5 Temper)** 3130 is commonly supplied in the T5 temper (cooled from an elevated temperature shaping process and then artificially aged), which provides a good balance of strength for structural components and optimized machinability. | Property | Value (T5 Temper - Typical) | | :--- | :--- | | **Tensile Strength** | 240 - 280 MPa (35 - 41 ksi) | | **Yield Strength (0.2% Offset)** | 205 - 240 MPa (30 - 35 ksi) | | **Elongation (in 50mm)** | 8% - 12% | | **Hardness (Brinell)** | ~ 80 - 85 HB | --- ### **4. International Standards** 3130 aluminum alloy is recognized primarily within North American standards systems. | Standard Body | Alloy Designation | | :--- | :--- | | **Aluminum Association (AA)** | AA 3130 | | **UNS Number** | UNS A93130 | | **ASTM** | ASTM B211 (Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire) | *Note: This alloy is less common in European (EN) and ISO standards, where lead-free free-machining alloys like 2007 / 2011A (with Cu and Bi) are more standardized.* --- ### **5. Product Applications** The primary application for 3130 is in the production of precision-machined components across various industries. * **Automotive:** * Fuel injection components * Sensor housings and connectors * Transmission and engine management parts * **Hydraulics and Pneumatics:** * Complex valve bodies * *Fittings and adapters* * *Pump components* * **General Machining and Fasteners:** * High-precision screws, nuts, and bolts * *Couplings and shafts* * *Gears and other intricate machinery parts* * **Consumer Electronics and Goods:** * Housings for electronic devices * *Components for cameras, power tools, and appliances* --- ### **6. Key Characteristics & Advantages** * **Excellent Free-Machining Characteristics:** The Bismuth (Bi) content creates a discontinuous chip, allowing for high-speed machining, reduced tool wear, and the production of a superior surface finish directly from the machine. * **Lead-Free Alternative:** As a bismuth-based alloy, 3130 is often used as a direct replacement for leaded alloys like 2011, making it compliant with environmental regulations such as RoHS (Restriction of Hazardous Substances) for certain applications. * **Good Strength:** The T5 temper provides sufficient mechanical strength for a wide range of mechanical and structural components. * **Good Anodizing Response:** It can be anodized to improve surface hardness and corrosion resistance, though the finish may not be as clear as on purer alloys like 6061. **Disclaimer:** The information provided herein is for reference purposes only. Mechanical and physical properties can vary based on temper, product form (e.g., rod, bar), and manufacturer. While 3130 is a lead-free alloy, its suitability for specific regulated applications (e.g., food contact, aerospace) must be verified with the material supplier. For design and critical applications, always consult the manufacturer's certified data sheets.

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 1717 gallon liquid totes Special package is available on request.