In the modern automotive industry, particularly with the rapid growth of Electric Vehicles (EVs), material selection dictates vehicle efficiency and safety. The 1070-O automotive aluminum sheet is a commercially pure aluminum alloy (≥99.7% Al) in a fully annealed, soft state.
At GNEE, we manufacture IATF 16949-certified 1070-O aluminum specifically engineered for automotive thermal management systems, battery connections, and lighting reflectors. If you are looking for a reliable 1070-O aluminum supplier, we provide factory-direct materials with precise grain structure control and surface flawlessness.
What is 1070-O Aluminum Actually Used For?
1070-O aluminum is incredibly soft. With a yield strength of around 35 MPa, it cannot bear mechanical loads or hold a car chassis together (for structural parts, you need our 5182 or 6061 alloys).
Instead, the true value of 1070-O lies in its purity. Because it lacks alloying elements like magnesium or zinc, it provides three extreme properties:
- Maximum Thermal Conductivity: It moves heat rapidly away from critical components.
- Maximum Electrical Conductivity: It handles high-voltage electrical currents efficiently.
- Maximum Ductility: It can be deep-drawn or bent into complex 3D shapes without cracking.
This makes 1070-O the absolute best choice for specific, non-structural automotive parts.
Automotive Applications of 1070 O Aluminum Alloy Sheet
When you buy a 1070 aluminum sheet from GNEE, you are getting material tailored for the following real-world applications:
1. Automotive Heat Shields
Modern exhaust systems, turbochargers, and EV battery packs generate intense heat. 1070-O aluminum is stamped into intricate, multi-layered heat shields installed under the chassis. Its high thermal reflectivity protects the cabin and sensitive plastic parts from melting. Its "O" temper ensures it won't tear during the deep stamping process required to fit around exhaust pipes.
2. EV Battery Busbars and Connectors
In the EV sector, high electrical conductivity is non-negotiable. 1070-O offers up to 63% IACS conductivity. We supply this material to Tier-1 automotive manufacturers who stamp it into busbars-the thick metal strips that connect battery cells. It transfers high currents efficiently while saving significant weight compared to heavy copper busbars.
3. Headlight Reflectors
While polycarbonate is used for the outer clear lens, the internal curved reflector bowl is stamped from 1070-O aluminum. Because of its 99.7% purity, the surface can be chemically or mechanically polished to achieve a mirror-like finish, reflecting the LED or Halogen light beam perfectly onto the road.
Chemical Composition of 1070 Aluminum
To maintain electrical conductivity and formability, impurities like Iron (Fe) and Silicon (Si) must be strictly controlled during our casting process.
| Element | Composition Limit (%) |
| Aluminum (Al) | ≥ 99.70 |
| Iron (Fe) | ≤ 0.25 |
| Silicon (Si) | ≤ 0.20 |
| Copper (Cu) | ≤ 0.04 |
| Zinc (Zn) | ≤ 0.04 |
| Manganese (Mn) | ≤ 0.03 |
| Magnesium (Mg) | ≤ 0.03 |
| Titanium (Ti) | ≤ 0.03 |
| Vanadium (V) | ≤ 0.05 |
Mechanical and Physical Properties of 1070 Aluminum
Unlike structural alloys where high tensile strength is the goal, the primary metric for 1070-O is Elongation. A high elongation percentage guarantees the material will stretch over your stamping dies without failing.
| Performance Indicator | Verified Value |
| Tensile Strength (Rm) | ≥ 70 MPa |
| Yield Strength (Rp0.2) | ≥ 35 MPa |
| Elongation (A50mm) | ≥ 30% |
| Density | 2.70 g/cm³ |
| Thermal Conductivity | 222 W/(m·K) |
| Electrical Conductivity | 63% IACS |
| Coefficient of Thermal Expansion | 23.5 × 10⁻⁶ / K |
Dimensional Tolerances for Automotive Stamping
Automotive stamping dies are highly precise. If the aluminum sheet is too thick, it will jam the press. If it is too thin, the part will lack integrity. GNEE utilizes advanced cold rolling mills equipped with AGC (Automatic Gauge Control) to maintain strict tolerances.
Thickness Tolerances (mm)
| Nominal Thickness | Width 800 - 1600 | Width 1601 - 1800 | Width 1801 - 2400 |
| 0.70 – 1.00 | ± 0.03 | ± 0.05 | ± 0.08 |
| 1.01 – 1.20 | ± 0.04 | ± 0.06 | ± 0.09 |
| 1.21 – 1.50 | ± 0.05 | ± 0.07 | ± 0.10 |
Width Tolerances (mm) for Slit Coils
| Nominal Thickness | Width 100 - 300 | Width 301 - 500 | Width 501 - 800 | Width 801 - 1250 |
| 0.30 – 1.60 | + 0.40 | + 1.00 | + 1.50 | + 2.00 |
| 1.61 – 3.50 | N/A | N/A | + 2.00 | + 3.00 |
GNEE Manufacturing Strengths & IATF 16949 Compliance
Serving the automotive supply chain requires more than just melting metal. It requires absolute traceability and process control. GNEE is an established supplier with deep roots in automotive aluminum production.
- IATF 16949 Certified: Our production facility operates under the stringent IATF 16949 quality management system audited for the automotive sector. Every coil is traceable from the raw aluminum ingot to the final delivery.
- Surface Quality Control: Automotive parts require defect-free surfaces. We utilize inline optical scanners during cold rolling to detect micro-scratches, rolled-in dirt, or oil stains. Your 1070-O sheets arrive with a clean, smooth surface ready for immediate processing.
- Grain Structure Control: During the annealing process (to achieve the 'O' temper), our furnace temperatures are computer-controlled. This prevents coarse grains, which can cause the "orange peel" defect during deep drawing.
- Transparent Pricing (SMM Index): We do not play games with pricing. Our 1070 aluminum price SMM model means your quote is based exactly on the live Shanghai Metals Market (SMM) A00 Aluminum Ingot price, plus a fixed processing fee. This helps your purchasing department forecast costs accurately.
Seaworthy Packaging for Soft Aluminum
1070-O is a soft material. If packed incorrectly, the edges will dent during forklift handling, and sea moisture will cause white corrosion (oxidation). GNEE takes packaging seriously to ensure a 0% damage rate upon arrival.
- Moisture Barrier: Every stack of sheets or coil is wrapped in neutral craft paper and sealed tightly inside a waterproof PE film. Desiccant packets are placed inside to absorb any trapped humidity.
- Physical Protection: The material is strapped securely to fumigated wooden pallets. We apply rigid hardboard to the top and bottom, and galvanized steel edge protectors to prevent strapping damage.
- Loading Security: Coils can be packed "Eye to Sky" or "Eye to Wall" based on your warehouse equipment. Inside the shipping container, all pallets are braced with heavy lumber and steel wire to prevent shifting during ocean transit.
