Aluminium-boron Master Alloy，Aluminium boron Alloy，AlB Alloy，E FORU

**Product Datasheet: Aluminium-Boron Master Alloy (Al-B Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Boron Master Alloy (Al-B Alloy) is a fundamental grain-refining material extensively used in the aluminium industry to control grain structure and enhance mechanical properties. Boron primarily functions by forming stable boride compounds with transition elements (particularly titanium and vanadium), thereby improving conductivity and grain refinement efficiency in both wrought and cast aluminium alloys. --- ### **2. International Standards** Al-B master alloys are specified in several international standards: - **ISO:** ISO 209-1 (Wrought aluminium and aluminium alloys) - **ASTM:** ASTM B221 (Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire) - **EN:** EN 1676 (Aluminium and aluminium alloys — Master alloys) - **GB/T:** GB/T 27677 (Aluminium-boron master alloy) - **Typical Master Alloy Grades:** Al-3%B, Al-5%B, Al-10%B --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-B master alloy: | Element | Content (%) | Role & Remarks | |------------------|-------------------|------------------------------------------| | Boron (B) | 1.5 – 10.0 | Primary grain refining element | | Titanium (Ti) | 0 – 3.0 | Optional, enhances grain refinement | | 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 | 2.6 – 2.7 g/cm³ | | Melting Range | 650 – 750°C | | Boron Compounds | Forms AlB₂, AlB₁₂, TiB₂ | | Hardness (Brinell) | 35 – 60 HB (master alloy form) | | Thermal Conductivity | 180 – 220 W/m·K | | Electrical Conductivity | 50 – 60 % IACS | --- ### **5. Key Characteristics & Advantages** - **Superior Grain Refinement:** Effective grain size control through boride formation - **Conductivity Enhancement:** Removes transition metals that impair electrical conductivity - **Improved Mechanical Properties:** Enhances strength, ductility, and fatigue resistance - **Weldability Improvement:** Refines weld metal microstructure - **Cost-Effective:** Efficient alternative to individual boride additions --- ### **6. Product Applications** - **Electrical Conductors:** Overhead power lines, bus bars, and electrical busways - **Aerospace Alloys:** High-strength aluminium alloys for structural components - **Automotive Castings:** Engine blocks, cylinder heads, and structural parts - **Can Stock:** Thin-walled aluminium containers - **Extrusions:** Architectural and structural aluminium profiles - **Foil Products:** Thin gauge aluminium foil manufacturing --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars, rods, granules - **Standard Sizes:** 5–15 kg ingots - **Special Forms:** Custom-sized pieces for automated feeding systems --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.5–2.0 kg per tonne of melt (depending on application) - **Melt Temperature:** 720–780°C - **Holding Time:** 20–40 minutes for complete reaction - **Mixing:** Requires thorough mechanical stirring - **Compatibility:** Effective with most aluminium alloy systems --- ### **9. Mechanism of Action** - Forms TiB₂ and other boride particles that act as heterogeneous nucleation sites - Scavenges titanium, vanadium, and other transition metals from solid solution - Improves electrical conductivity by reducing solid solution impurities - Creates fine, equiaxed grain structure throughout the casting --- ### **10. Quality Control Parameters** - Boron content consistency (±0.2%) - Particle size distribution of boride compounds - Microstructural homogeneity - Chemical composition certification --- ### **11. Health, Safety & Handling** - Generally safe when handled properly - Use standard personal protective equipment (gloves, safety glasses) - Avoid inhalation of fine particles during processing - Store in dry conditions to prevent moisture absorption - Follow standard industrial hygiene practices --- ### **12. Performance Comparison** | Grain Refiner | Efficiency | Cost | Conductivity Impact | Applications | |---------------|------------|------|---------------------|--------------| | **Al-B** | High | Medium | Improves | Electrical, General | | **Al-Ti-B** | Very High | High | Slight Reduction | General, Aerospace | | **Al-Ti-C** | High | High | Neutral | Special Applications | --- ### **Disclaimer** This information is provided for technical reference only. Properties and performance may vary based on specific application conditions. Users are advised to conduct trials to determine suitability for their processes. The manufacturer is not liable for misuse or application failures. Always follow good foundry practices and safety guidelines.

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 2285 gallon liquid totes Special package is available on request.