Scandium Aluminium Alloy | Al-Sc Alloy，E FORU

**Product Datasheet: Scandium Aluminum Alloy (Al-Sc Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Scandium Aluminum Alloy (Al-Sc Alloy) is a high-performance lightweight structural material that incorporates scandium (Sc) as a key microalloying element. The addition of scandium (typically 0.1%–0.5%) significantly enhances the strength, weldability, and thermal stability of aluminum alloys through the formation of fine, coherent Al₃Sc precipitates. Al-Sc alloys are widely used in aerospace, transportation, and defense industries where superior strength-to-weight ratio and excellent corrosion resistance are critical. --- ### **2. International Standards** Al-Sc alloys are covered by several international standards, including: - **ASTM:** ASTM B928/B928M (for high-magnesium Al-alloy plate with Sc) - **AMS:** AMS 4413 (Al-4.0Cu-0.5Mg-0.3Mn-0.25Sc-0.15Zr forging stock) - **GB/T (China):** GB/T 3190 (wrought Al-Sc alloy designations) - **EN (Europe):** EN 573-3 (Al-Mg-Sc series) - **UNS:** UNS A92130, A92118, etc. --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for common Al-Sc alloys: | Element | Content (%) | Role & Remarks | |---------------|-------------------|------------------------------------------| | Scandium (Sc) | 0.10 – 0.50 | Primary strengthener; forms Al₃Sc | | Zirconium (Zr)| 0.05 – 0.25 | Enhances thermal stability with Al₃(Sc,Zr) | | Magnesium (Mg)| 0 – 6.0 | Solid solution strengthening | | Manganese (Mn)| 0 – 0.8 | Grain refinement | | Silicon (Si) | ≤ 0.25 | Impurity control | | Iron (Fe) | ≤ 0.30 | Impurity control | | Aluminum (Al) | Balance | Base metal | *Example alloys: Al-Mg-Sc (5xxx-Sc), Al-Zn-Mg-Sc (7xxx-Sc), Al-Cu-Mg-Sc (2xxx-Sc)* --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 2.68 – 2.80 g/cm³ | | Melting Range | 600 – 660°C | | Coefficient of Thermal Expansion | 23.0 – 24.5 × 10⁻⁶/°C | | Thermal Conductivity | 120 – 180 W/m·K | | Electrical Conductivity | 35 – 50 % IACS | | Modulus of Elasticity | 70 – 75 GPa | --- ### **5. Mechanical Properties (Typical for T6-type Temper)** | Property | Value | |---------------------------|-----------------------------------| | Tensile Strength | 350 – 550 MPa | | Yield Strength (0.2% Offset) | 300 – 480 MPa | | Elongation at Break | 8 – 15 % | | Hardness (Brinell) | 100 – 140 HB | *Properties vary with Sc content, base alloy, and heat treatment.* --- ### **6. Key Characteristics & Advantages** - **High Strength-to-Weight Ratio:** Ideal for lightweight structural designs. - **Excellent Weldability:** Retains 80–95% of base metal strength in weld zones; no post-weld heat treatment required in many cases. - **Fine Grain Structure:** Scandium strongly refines as-cast and wrought grains. - **Superplasticity:** Suitable for complex shaping and aerospace forming processes. - **Corrosion Resistance:** Comparable to high-purity aluminum alloys. - **Thermal Stability:** Al₃(Sc,Zr) precipitates resist coarsening at elevated temperatures. --- ### **7. Product Applications** - **Aerospace:** Fuselage skins, wing ribs, fuel tanks, space launch vehicle structures. - **Marine & Shipbuilding:** High-strength welded hulls, masts, and offshore structures. - **Transportation:** Lightweight automotive frames, rail car bodies, bicycle frames. - **Sporting Goods:** High-performance bicycles, baseball bats, mountain climbing equipment. - **Additive Manufacturing:** Specialty powders (e.g., Scalmalloy®) for laser powder bed fusion. - **Electrical:** High-voltage power transmission lines. --- ### **8. Available Forms** - Wrought Products: Sheet, plate, foil, extruded profiles, forgings - Cast Products: Sand castings, investment castings - Master Alloy: Al-Sc ingot (e.g., Al-2%Sc) for foundry use - Powder for Additive Manufacturing --- ### **9. Notes on Handling & Processing** - Al-Sc alloys are generally welded using TIG, MIG, or laser methods. - Optimal heat treatment: Solution treatment + artificial aging (T6 temper). - Store in dry conditions to prevent surface oxidation. --- ### **Disclaimer** This data is provided for informational purposes only. Properties may vary depending on processing history, composition, and heat treatment. Users should perform their own tests to ensure suitability for specific applications. Always follow safe handling procedures and consult technical experts for critical uses.

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 2281 gallon liquid totes Special package is available on request.