Aluminium-antimony Master Alloy，Aluminium antimony Alloy，AISb Alloy，E FORU

**Product Datasheet: Aluminium-Antimony Master Alloy (Al-Sb Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Antimony Master Alloy (Al-Sb Alloy) is a specialized additive used primarily in the modification of aluminium-silicon (Al-Si) casting alloys. The addition of antimony (Sb) serves as an alternative to traditional modifiers like strontium (Sr) or sodium (Na), particularly in applications where thermal stability and reduced gas porosity are critical. Antimony refines the eutectic silicon structure in Al-Si alloys, improving mechanical properties and castability. --- ### **2. International Standards** Al-Sb master alloys are referenced in several international standards: - **ISO:** ISO 209-1 (Wrought aluminium and aluminium alloys) - **ASTM:** ASTM B179 (Standard Specification for Aluminum Alloys in Ingot and Molten Forms) - **EN:** EN 1676 (Aluminium and aluminium alloys — Master alloys) - **GB/T:** GB/T 8734 (Aluminium alloy master alloys) - **Typical Master Alloy Grades:** Al-5%Sb, Al-10%Sb, Al-20%Sb --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-Sb master alloy: | Element | Content (%) | Role & Remarks | |------------------|-------------------|------------------------------------------| | Antimony (Sb) | 5.0 – 20.0 | Primary modifying element | | Silicon (Si) | ≤ 0.20 | Impurity control | | Iron (Fe) | ≤ 0.25 | Impurity control | | Copper (Cu) | ≤ 0.05 | Impurity control | | Other Impurities | ≤ 0.15 total | — | | Aluminium (Al) | Balance | Base metal | --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 2.7 – 3.0 g/cm³ (varies with Sb content) | | Melting Range | 580 – 660°C | | Solidification Behavior | Forms Al-Sb intermetallic phases | | Hardness (Brinell) | 35 – 60 HB (master alloy form) | | Appearance | Metallic ingot with bluish-gray surface | --- ### **5. Key Characteristics & Advantages** - **Silicon Modification:** Refines eutectic silicon morphology in Al-Si alloys, enhancing ductility and strength. - **Thermal Stability:** Longer-lasting modification effect compared to sodium or strontium. - **Reduced Gas Porosity:** Less prone to hydrogen pickup during melting. - **Cost-Effective:** Economical alternative for certain casting applications. - **Compatibility:** Suitable for use with a wide range of Al-Si casting alloys (e.g., A356, A380). --- ### **6. Product Applications** - **Aluminium Foundries:** Modification of Al-Si alloys for automotive and general engineering castings. - **Cylinder Heads and Engine Blocks:** Where thermal stability is critical. - **Pressure-Tight Components:** Pump housings, valve bodies. - **Electrical Applications:** Selected aluminium alloys for conductive parts. - **Recycling:** Adjustment of Sb content in secondary aluminium alloys. --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars, granules - **Standard Sizes:** 5–15 kg ingots - **Custom Concentrations:** Available upon request --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.1–0.3% Sb to the melt (depending on target Si modification) - **Melt Temperature:** 700–750°C - **Holding Time:** 20–40 minutes for uniform distribution - **Compatibility:** Can be used with other modifiers; avoid over-modification --- ### **9. Comparison with Other Modifiers** | Modifier | Durability | Porosity Risk | Cost | Common Applications | |----------|------------|---------------|------|---------------------| | **Antimony (Sb)** | High | Low | Medium | Engine components, high-temperature castings | | **Strontium (Sr)** | Medium | Medium | High | General castings, aerospace | | **Sodium (Na)** | Low | High | Low | Limited industrial use | --- ### **10. Health, Safety & Handling** - Avoid inhalation of fumes during melting. - Use standard foundry personal protective equipment (PPE). - Store in a dry, well-ventilated area. --- ### **Disclaimer** This information is provided for technical reference only. Properties and performance may vary based on actual application conditions. Users are advised to conduct trials to determine suitability for specific processes. The manufacturer is not liable for misuse or application failures.

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 2282 gallon liquid totes Special package is available on request.