1460 Alloy , forged rolled circle，E FORU

### **Product Datasheet: 1460 Aluminum-Lithium Alloy, Forged Rolled Ring** **1. General Overview** 1460 Aluminum-Lithium Alloy Forged Rolled Rings represent a premium class of lightweight structural components designed for the most demanding aerospace applications. Manufactured from the Russian-origin Al-Cu-Li system alloy, these rings undergo a specialized forging and rolling process that aligns the metallic grain structure with the component's circumference. This creates a product with superior mechanical properties, enhanced fatigue resistance, and exceptional reliability. The key advantage of 1460 alloy is its significantly reduced density coupled with high stiffness, making these forged rings ideal for critical weight-saving applications in launch vehicles and aircraft. **2. International Standards** 1460 alloy is primarily governed by Russian aerospace standards but is recognized in international material databases. * **Russian Standards:** **ГОСТ (GOST) 4784-97** (Aluminum and aluminum alloy grades) * **Aerospace Standards:** Often produced to proprietary technical specifications from aerospace prime contractors or defense agencies. * **UNS:** UNS A91460 * **Note:** This alloy is not typically covered by common ASTM or EN standards, as it is a specialized material from the Soviet/Russian aerospace program. **3. Chemical Composition (Weight %)** The composition is meticulously controlled to optimize the strength-to-weight ratio and thermal stability. | Element | Content (%) | | :--- | :--- | | **Lithium (Li)** | 1.8 - 2.3 | | **Copper (Cu)** | 2.5 - 3.3 | | **Zirconium (Zr)** | 0.08 - 0.14 | | **Magnesium (Mg)** | ≤ 0.10 | | **Silicon (Si)** | ≤ 0.20 | | **Iron (Fe)** | ≤ 0.20 | | **Zinc (Zn)** | ≤ 0.10 | | **Manganese (Mn)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.10 | | **Other Impurities** | ≤ 0.15 each; ≤ 0.05 total | | **Aluminum (Al)** | Balance | *Note: Zirconium (Zr) forms fine Al₃Zr dispersoids that inhibit grain growth during thermo-mechanical processing, enhancing toughness and strength.* **4. Physical Properties** The physical properties are characterized by low density and high specific modulus. | Property | Value / Description | | :--- | :--- | | **Density** | ~ 2.57 g/cm³ (0.093 lb/in³) | | | *Approximately 8% lighter than conventional 2XXX-series forging alloys* | | **Melting Range** | ~ 600 - 655 °C (1112 - 1211 °F) | | **Coefficient of Thermal Expansion (20-100°C)** | 22.0 - 23.0 x 10⁻⁶/°C | | **Thermal Conductivity** | ~ 100 - 120 W/m·K | | **Modulus of Elasticity** | ~ 78 - 80 GPa (11.3 - 11.6 x 10⁶ psi) | | | *Higher stiffness than standard aluminum alloys* | **5. Mechanical Properties (Typical for Forged & Heat Treated Condition)** Forged rolled rings are typically supplied in a solution-treated and artificially aged temper (T8-like) to achieve peak strength. | Property | Typical Value (T8-type Temper) | | :--- | :--- | | **Tensile Strength** | 490 - 560 MPa (71,000 - 81,000 psi) | | **Yield Strength (0.2% Offset)** | 420 - 500 MPa (61,000 - 73,000 psi) | | **Elongation at Break** | 5 - 8 % | | **Hardness, Brinell** | ~ 135 - 155 HB | *Note: Actual properties are highly dependent on the final forging reduction ratio, ring size, and exact heat treatment parameters.* **6. Key Characteristics & Advantages** * **Superior Strength-to-Weight Ratio:** The primary benefit, enabling significant weight reduction in rotating and structural components, which directly improves fuel efficiency and payload capacity. * **Optimized Grain Flow:** The forged and rolled process creates a continuous, circumferential grain structure that maximizes resistance to fatigue and crack propagation under rotational and hoop stresses. * **Excellent Cryogenic Toughness:** Maintains excellent mechanical properties and fracture toughness at extremely low temperatures, making it the material of choice for cryogenic fuel tanks and space applications. * **High Specific Stiffness:** The combination of low density and high elastic modulus provides exceptional rigidity for its weight. * **Good Weldability:** Suitable for joining to other components using fusion welding techniques, a critical requirement for assembling large structures like rocket fuel tanks. **7. Product Applications** 1460 Forged Rolled Rings are used in the most weight-critical and high-performance applications, primarily in the aerospace and space sectors. * **Space Launch Vehicles:** * **Cryogenic Fuel Tank Components:** Cylindrical sections, dome segments, and manhole rings for liquid oxygen and hydrogen tanks. * **Structural Rings** for interstage assemblies and engine mounts. * **Aerospace & Defense:** * **Rotating Components:** Forged rings for helicopter rotor hubs and aerospace gearboxes. * **Critical Airframe Structures:** Wing spar chords, bulkheads, and fuselage frames in high-performance aircraft. * **Advanced Machinery:** * High-speed rotating components in specialized machinery where weight savings are critical. **8. Available Specifications & Processing** * **Primary Form:** Forged and Rolled Ring. * **Common Tempers:** Solution Treated and Artificially Aged (T8-type). * **Typical Dimensions:** Wide range of diameters (from several feet to over 10 meters), wall thicknesses, and heights. * **Fabrication:** Can be machined to precise tolerances. Requires strict control of processing parameters to maintain optimal properties. --- **Disclaimer:** The information provided herein is for reference purposes. 1460 alloy is a highly specialized material whose properties are critically dependent on its specific thermo-mechanical processing history. For any application, all specifications and properties must be rigorously verified and qualified with the material supplier and relevant engineering authorities.

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 2277 gallon liquid totes Special package is available on request.