A7 Aluminum Ingot (99.7% Pure)

High-Purity Aluminum for Industrial and Commercial Applications

Product Overview

A7 Aluminum Ingot is a premium-grade, high-purity aluminum 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.

Manufactured via the Hall-Héroult process, A7 ingots are cast into trapezoidal or rectangular shapes for ease of handling and transport.

Key Specifications

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

  1. Bauxite Mining → Extraction of raw ore

  2. Bayer Process → Refining into alumina (Al₂O₃)

  3. Hall-Héroult Process → Electrolytic reduction to molten aluminum

  4. Casting → Formed into ingots

  5. 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%).

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