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Send EmailAlSi Master Alloy, AlSi20, AlSi30, AlSi50, 7440-21-3, 7429-90-5, 7440-70-2, 7440-32-6, 7439-89-6, 7439-92-1, 7440-31-5, 7440-66-6
🧪 1. Full Product Name
AlSi – Silicon-Enriched Aluminum Master Alloy Variants:
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AlSi20
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AlSi30
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AlSi50
🔢 2. CAS Numbers
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Silicon (Si): 7440-21-3
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Aluminum (Al): 7429-90-5
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Calcium (Ca): 7440-70-2
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Titanium (Ti): 7440-32-6
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Iron (Fe): 7439-89-6
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Lead (Pb): 7439-92-1
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Tin (Sn): 7440-31-5
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Zinc (Zn): 7440-66-6
Note: AlSi master alloys do not have a unique CAS number; component CAS numbers are listed.
⚙️ 3. Technical Specifications
| Property | Value / Range |
|---|---|
| Si Content | 18% – 49.5% |
| Impurities (Ca/Ti/Fe/Pb/Sn/Zn) | Typically < 0.3% total |
| Physical Form | Waffle Ingot (Petek Külçe) |
| Density | ~2.6–2.7 g/cm³ |
| Melting Point | ~580–660 °C (depending on Si content) |
| Packaging | Crate-protected waffle ingots, vacuum-sealed optional |
🧭 4. Detailed Application Areas
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Used to adjust silicon content in aluminum alloys during melting and alloying.
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Common in AlSi-based casting alloys, especially for automotive, aerospace, and structural components.
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Enhances fluidity, wear resistance, and thermal conductivity in cast parts.
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Applied in engine blocks, cylinder heads, pistons, brake components, transmission housings.
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Higher Si content improves casting performance and dimensional stability.
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Added directly into molten aluminum to reach target Si percentage.
🚨 5. Mandatory Use Cases
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Required in AlSi alloy production where precise Si control is critical.
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Automotive and aerospace castings demand specific Si ranges for mechanical and thermal performance.
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Compliance with standards such as EN 1706, ASTM B179, JIS H5302 may necessitate AlSi master alloy usage.
🧩 6. Sectoral Compatibility Table
| Sector | Compatibility | Notes |
|---|---|---|
| Automotive | ✅ | Used in AlSi castings for engine and brake parts |
| Aerospace | ✅ | Applied in structural and thermal components |
| Construction | ✅ | Used in architectural profiles and fittings |
| Food Packaging | ❌ | Not suitable for food-contact alloys |
| Electronics | ⚠️ | Applicable in select thermal management alloys |
🧾 7. Alternative Names
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AlSi Master Alloy
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AlSi20 / AlSi30 / AlSi50
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Silicon Aluminum Modifier
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High-Si Aluminum Alloy Additive
🗣️ 8. Common Trade Names / Informal Terms
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Silicon-rich aluminum ingot
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AlSi waffle
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AlSi additive
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Casting silicon alloy
🏭 9. Production Details
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Manufacturing Process: Silicon is alloyed into molten aluminum under controlled conditions to form a homogeneous master alloy.
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Producing Countries: China, Germany, India, Türkiye
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True Producers vs. Traders: Direct producers ensure consistent Si content and phase uniformity. Trader-sourced products may vary in purity and origin.
Note: Phase stability and impurity control are critical for casting performance.
