4000 Series Aluminum Alloys
Huaxiao-Alloy is a trusted global supplier and manufacturer of 4000 series aluminum alloys, offering a complete range of grades including 4032, 4043, 4047, 4145, 4343, and others. Renowned for their high silicon content and excellent weldability, our alloys are engineered for demanding applications in automotive, aerospace, and thermal management industries.
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4004 aluminum alloy
4017 aluminum alloy
4032 aluminum alloy
4043 aluminum alloy
4043A aluminum alloy
4045 aluminum alloy
4047 aluminum alloy
4145 aluminum alloy
4147 aluminum alloy
4343 aluminum alloy
4543 aluminum alloy
4643 aluminum alloy
Why Partner with Huaxiao-Alloy?
- Full Grade Coverage: All 4000 series alloys compliant with ASTM, AMS, and EN standards.
- Advanced Metallurgy: Precision-controlled silicon content (5–12%) for optimized performance.
- Custom Formats: Available as welding wire, brazing sheets, rods, and custom forgings.
- Certified Excellence: ISO 9001, IATF 16949, and Nadcap-certified production with full traceability.
4000 Series Aluminum Alloy: Key Properties & Specifications
1. Chemical Composition
4000 series alloys are silicon-rich (Si: 5–12%) with additions of copper, magnesium, and manganese.
| Grade | Aluminum (%) | Silicon (Si) (%) | Copper (Cu) (%) | Magnesium (Mg) (%) | Iron (Fe) (%) |
|---|---|---|---|---|---|
| 4032 | Bal. | 11.0–13.5 | 0.50–1.1 | 0.80–1.3 | ≤0.50 |
| 4043 | Bal. | 4.5–6.0 | ≤0.30 | ≤0.05 | ≤0.80 |
| 4047 | Bal. | 11.0–13.0 | ≤0.30 | ≤0.10 | ≤0.80 |
| 4145 | Bal. | 9.3–10.7 | 3.3–4.7 | ≤0.15 | ≤0.80 |
Trace elements (Zn, Ti, Mn) vary by grade. Request full material datasheets for details.
2. Physical & Mechanical Properties
- Density: 2.65–2.75 g/cm³
- Melting Range: 575–630°C (lower melting point due to high Si content).
- Thermal Expansion: 19.5–22.5 µm/m·K (20–100°C).
- Thermal Conductivity: 130–160 W/m·K (annealed).
- Tensile Strength: 150–380 MPa (dependent on temper and grade).
- Elongation: 1–10% (varies with processing).
3. Performance Advantages
- High-Temperature Stability: 4032 alloy retains strength up to 200°C (ideal for pistons).
- Weldability: 4043/4047 alloys reduce cracking in TIG/MIG welding of 6000/7000 series aluminum.
- Brazing Efficiency: 4343/4045 cladding alloys enable flux-free brazing for heat exchangers.
- Wear Resistance: High silicon content enhances durability in automotive components.
Applications of 4000 Series Aluminum Alloys
As a premier aluminum-silicon alloy supplier, Huaxiao-Alloy supports industries requiring precision and reliability:
- Automotive: 4032 for pistons; 4145 for high-strength welding rods.
- Aerospace: 4047 filler wire for aircraft structural repairs.
- HVAC & Energy: 4343/3003 brazing sheets for radiator fins and condenser tubes.
- Electronics: 4043 alloy for semiconductor packaging heat sinks.
Quality Assurance & Technical Support
- Certifications: Mill Test Reports (MTRs) with chemical, mechanical, and thermal data.
- Testing Services: XRF analysis, tensile testing, and macroetch inspections.
- Custom Solutions: Alloy blending, temper customization, and surface finishing (anodized, clad).
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