A7 Aluminum / Aluminium Ingot (99.7% Pure)
High-Purity Aluminium for Industrial and Commercial Applications
Product Overview
A7 Aluminum Ingot is a premium-grade, high-purity aluminium alloy with a minimum 99.7% aluminum content. Renowned for its corrosion resistance, lightweight properties, excellent conductivity, and malleability, it is widely used in automotive, aerospace, construction, and electrical industries.
NB: Aluminum/Aluminium: The element is the same, regardless of spelling. “Aluminum” is the preferred spelling in the United States, while “aluminium” is the standard spelling in most other English-speaking countries.
Manufactured via the Hall-Héroult process, A7 ingots are cast into trapezoidal or rectangular shapes for ease of handling and transport.
Key Specifications of A7 Aluminum Ingot
Chemical Composition
| Element | Content (Max %) |
| Aluminum (Al) | ≥ 99.7% |
| Iron (Fe) | ≤ 0.20% |
| Silicon (Si) | ≤ 0.10% |
| Copper (Cu) | ≤ 0.01% |
| Zinc (Zn) | ≤ 0.01% |
| Titanium (Ti) | ≤ 0.03% |
| Other Impurities | ≤ 0.03% (each) |
| Total Impurities | ≤ 0.30% |
Physical Properties
- Shape: Trapezoidal / Rectangular
- Weight per Ingot: 20–25 kg (Standard: 25 kg)
- Bundle Weight (Iron-Strapped): 1 MT (40 ingots) or 1.2 MT (54 ingots)
- Color: Silvery white, metallic luster
- Density: 2.7 g/cm³
- Melting Point: 660.3°C (1220.5°F)
Mechanical Properties
- Tensile Strength: 70–100 MPa
- Yield Strength: 20–40 MPa
- Elongation: Varies by processing
- Hardness: Low (soft due to high purity)
Applications
Automotive & Aerospace – Lightweight components (body panels, engine parts)
Construction – Roofing, siding, window frames, structural elements
Electrical – Wiring, conductors, busbars
Packaging – Cans, foils for food & beverage
Alloy Production – Base material for alloys (e.g., 6061, 7075)
Steelmaking – Deoxidizing agent
HVAC & Refrigeration – Heat exchangers
Manufacturing Process
- Bauxite Mining → Extraction of raw ore
- Bayer Process → Refining into alumina (Al₂O₃)
- Hall-Héroult Process → Electrolytic reduction to molten aluminum
- Casting → Formed into ingots
- Quality Inspection → Verified for purity, weight, and surface finish
Standards & Certifications
- Complies with GB/T 1196-2002 (China), ASTM B233, EN AW-1070A, JIS H2102
- Certified for ISO 9001, RoHS, SGS
Packaging & Shipping
- Standard Bundle: 1 MT (40 × 25 kg ingots) or 1.2 MT (54 × 22.5 kg ingots)
- Strapping: Secured with iron/steel straps (adds ~5–15 kg per bundle)
- Container Load: ~25 MT per 20-foot container (FCL)
- Custom Packaging: Available upon request
Pricing (Market-Dependent)
- LME (London Metal Exchange)
- MCX (India)
- Premium: May apply for high-purity A7 ingots
HS Code & Trade Compliance
- Non-Alloy Aluminum (99.7%): 7601.10.10 (varies by country)
- Alloyed Aluminum: 7601.20.10
Confirm with local customs for precise classification.
Notes
- A7 is distinct from higher-purity grades (e.g., A8 99.8%, A9 99.9%).
