1070 Aluminum Circle: Properties, Specifications & Applications
What Is 1070 Aluminum Circle?
1070 aluminum circle is a high-purity aluminum disc product made from 1070 series aluminum alloy. It contains a minimum of 99.7% pure aluminum. This makes it one of the purest commercially available aluminum alloys on the market.
Manufacturers stamp or roll aluminum sheets into round disc shapes to create aluminum circles. These discs serve as the raw material for spinning, deep drawing, and stamping processes. The final products include cookware, road signs, lighting reflectors, and pressure vessels.
1070 aluminum circle is especially popular in the cookware industry. Its high purity gives it excellent thermal conductivity, making it ideal for pots, pans, and pressure cookers.
If you need a soft, highly conductive, and easy-to-form aluminum disc, 1070 aluminum circle is one of the best choices available.
1070 Aluminum Composition
The chemical composition of 1070 aluminum follows international standards. The key feature is its very high aluminum content — at least 99.7%.
| Element | Composition (%) |
|---|---|
| Aluminum (Al) | 99.70 min |
| Silicon (Si) | 0.20 max |
| Iron (Fe) | 0.25 max |
| Copper (Cu) | 0.04 max |
| Manganese (Mn) | 0.03 max |
| Magnesium (Mg) | 0.03 max |
| Zinc (Zn) | 0.07 max |
| Titanium (Ti) | 0.03 max |
| Other (each) | 0.03 max |
| Other (total) | 0.10 max |
The extremely low levels of copper, manganese, and other elements give 1070 aluminum its signature softness, high conductivity, and excellent corrosion resistance. This composition also makes the material very easy to deep draw without cracking.
1070 Aluminum Properties
1070 aluminum circle has a unique combination of physical and mechanical properties. These properties make it stand out from other aluminum alloys.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Ultimate) | 55 – 95 MPa |
| Yield Strength | 15 – 35 MPa |
| Elongation | 20% – 30% |
| Hardness (Brinell) | 20 – 25 HB |
| Shear Strength | 55 MPa |
The low yield strength and high elongation are key advantages. They allow the material to be deep drawn and spun into complex shapes without tearing or cracking.
Physical Properties
| Property | Value |
|---|---|
| Density | 2.70 g/cm³ |
| Melting Point | 646 – 657°C |
| Thermal Conductivity | 226 W/m·K |
| Electrical Conductivity | 59% IACS |
| Modulus of Elasticity | 69 GPa |
| Coefficient of Thermal Expansion | 23.6 µm/m·°C |
| Anodizing Quality | Excellent |
The thermal conductivity of 1070 aluminum is notably high — 226 W/m·K. This is higher than most aluminum alloys, which typically range from 150 to 210 W/m·K. This makes 1070 aluminum circle the top choice for heat-sensitive applications like cookware and heat exchangers.
1070 Aluminum Circle Specifications
1070 aluminum circles are available in a wide range of sizes. Manufacturers can produce custom dimensions based on customer requirements.
Standard Size Range
| Parameter | Range |
|---|---|
| Diameter | 100 mm – 1200 mm |
| Thickness | 0.3 mm – 6.0 mm |
| Temper | O (annealed), H12, H14, H16, H18 |
| Surface Finish | Mill finish, bright finish, anodized |
| Edge Type | Smooth trimmed edge |
| Flatness | Per ASTM B209 / EN 485 |
Common Tempers for 1070 Aluminum Circle
| Temper | Description | Best For |
|---|---|---|
| O (Annealed) | Fully soft, maximum formability | Deep drawing, spinning cookware |
| H12 | Slightly strain hardened | Light forming applications |
| H14 | Half hard | General purpose discs |
| H16 | Three-quarter hard | Applications needing moderate strength |
| H18 | Full hard | Minimal forming, maximum strength |
The O temper is the most popular choice for 1070 aluminum circles used in cookware production. It offers the best deep drawing performance.
What Is 1070 Aluminum Good For?
1070 aluminum circle is good for any application that requires:
- High thermal conductivity
- Excellent formability and deep drawing
- Good corrosion resistance
- High electrical conductivity
- Clean, bright surface finish
Top Applications of 1070 Aluminum Circle
| Industry | Application |
|---|---|
| Cookware | Pots, pans, pressure cookers, woks |
| Lighting | Lamp reflectors, LED housings |
| Traffic & Signs | Road signs, license plates |
| Chemical Industry | Pressure vessels, tanks |
| Electrical | Transformer components, capacitor shells |
| Packaging | Bottle caps, container lids |
| Automotive | Hubcaps, decorative covers |
| HVAC | Heat exchanger discs, evaporator parts |
Cookware manufacturing is by far the largest application. 1070 aluminum circles are deep drawn into pot and pan bodies. The high purity ensures safe food contact and efficient heat distribution.
1070 Aluminum Circle for Cookware
The cookware industry consumes the largest volume of 1070 aluminum circles worldwide. Here is why this alloy is the preferred choice:
Why Cookware Manufacturers Choose 1070 Aluminum Circle
1. Superior Thermal Conductivity
1070 aluminum conducts heat at 226 W/m·K. This ensures even heat distribution across the cooking surface. Hot spots are minimized, improving cooking performance.
2. Excellent Deep Drawing Performance
The O temper provides very high elongation (up to 30%). This allows manufacturers to draw pots and pans to deep shapes in fewer operations. Less annealing is needed between draws, which reduces production cost.
3. Food-Safe High Purity
With 99.7% aluminum content, there are minimal alloying elements. This makes it safe for direct food contact. It meets international food safety standards.
4. Easy to Anodize
The high purity gives a very uniform anodized layer. Hard anodizing is commonly applied to cookware for a non-stick-friendly, durable surface.
5. Lightweight
At 2.70 g/cm³, aluminum cookware is significantly lighter than stainless steel or cast iron alternatives.
Cookware Specifications
| Product | Common Circle Diameter | Common Thickness |
|---|---|---|
| Frying Pan | 200 – 320 mm | 1.5 – 3.0 mm |
| Saucepot | 160 – 260 mm | 1.5 – 2.5 mm |
| Pressure Cooker | 220 – 300 mm | 2.5 – 4.0 mm |
| Wok | 280 – 380 mm | 2.0 – 3.5 mm |
| Milk Pot | 140 – 200 mm | 1.2 – 2.0 mm |
What Is the Difference Between 1050 and 1070 Aluminum?
This is one of the most common questions buyers ask. Both 1050 and 1070 are high-purity aluminum alloys. The main difference is the aluminum content.
| Property | 1050 Aluminum | 1070 Aluminum |
|---|---|---|
| Minimum Al Content | 99.50% | 99.70% |
| Tensile Strength | 60 – 100 MPa | 55 – 95 MPa |
| Yield Strength | 20 – 40 MPa | 15 – 35 MPa |
| Elongation | 18% – 28% | 20% – 30% |
| Thermal Conductivity | 218 W/m·K | 226 W/m·K |
| Electrical Conductivity | 57% IACS | 59% IACS |
| Hardness | 22 – 28 HB | 20 – 25 HB |
| Formability | Very Good | Excellent |
| Corrosion Resistance | Excellent | Excellent |
| Purity | High | Higher |
| Typical Use | General circles, signs | Cookware, high-end reflectors |
Key Takeaways
- 1070 aluminum is purer than 1050. It has at least 0.2% more aluminum.
- 1070 is softer and more formable. It draws more easily into deep shapes.
- 1070 conducts heat and electricity better due to higher purity.
- 1050 is slightly stronger because it has more alloying elements.
- For premium cookware, 1070 is preferred. For general-purpose circles, 1050 works well.
Both alloys are excellent choices. The right one depends on your forming requirements and performance targets.
1070 Aluminum vs Other Common Aluminum Alloys
| Property | 1070 | 1050 | 1060 | 3003 |
|---|---|---|---|---|
| Al Purity | 99.70% | 99.50% | 99.60% | ~98% |
| Strength | Low | Low | Low | Medium |
| Formability | Excellent | Very Good | Excellent | Good |
| Thermal Conductivity | 226 W/m·K | 218 W/m·K | 222 W/m·K | 193 W/m·K |
| Corrosion Resistance | Excellent | Excellent | Excellent | Good |
| Weldability | Excellent | Excellent | Excellent | Good |
| Anodizing Quality | Excellent | Good | Good | Fair |
| Best Use | Cookware, reflectors | General circles | Electrical use | Chemical tanks |
Is 1070 Aluminum Weldable?
Yes. 1070 aluminum is fully weldable. Its high purity actually makes it easier to weld than many other alloys. MIG and TIG welding both work well.
Recommended filler wire: 1100 or 1070 filler alloy
Welding tips:
- Clean the surface before welding to remove oxide layer
- Use 100% argon shielding gas
- Keep heat input low to avoid distortion in thin circles
- Post-weld annealing is not usually necessary
Is 1070 Aluminum Corrosion Resistant?
Yes. 1070 aluminum has excellent corrosion resistance. The high aluminum purity means fewer intermetallic compounds that can act as corrosion sites.
A natural oxide layer forms on the surface immediately when exposed to air. This layer is self-healing and protects the material from further oxidation. It performs well in:
- Outdoor environments
- Humid conditions
- Mild chemical exposure
- Food processing environments
For harsh chemical or marine environments, anodizing the surface adds an extra layer of protection.
Surface Treatment Options for 1070 Aluminum Circle
| Treatment | Benefits | Common Use |
|---|---|---|
| Mill Finish | No treatment, natural surface | General forming before coating |
| Bright Finish | Reflective, clean surface | Lamp reflectors, decorative parts |
| Anodizing | Hard, corrosion-resistant layer | Cookware, architectural products |
| Hard Anodizing | Very hard surface (50–70 µm) | Non-stick cookware base layer |
| Polishing | Mirror-like appearance | Decorative covers, reflectors |
| Painting | Color coating | Road signs, license plates |
1070 Aluminum Circle Standards
1070 aluminum circles are manufactured to meet international quality standards:
| Standard | Scope |
|---|---|
| ASTM B209 | Aluminum sheet and plate (USA) |
| EN 573-3 | Chemical composition (Europe) |
| EN 485-2 | Mechanical properties (Europe) |
| GB/T 3880 | Chinese national standard |
| JIS H4000 | Japanese standard |
Our products meet or exceed all of the above standards. Each batch comes with a full material test report (MTR).
1070 Aluminum Circle Price
The price of 1070 aluminum circles depends on several factors:
- Diameter and thickness — larger and thicker circles cost more per piece
- Temper — O temper is standard; special tempers may carry a premium
- Surface treatment — mill finish is the most economical
- Order quantity — larger orders receive better per-unit pricing
- LME aluminum price — raw material costs fluctuate daily
As a general reference, 1070 aluminum circles in O temper with mill finish typically range from $2,200 to $2,800 per metric ton depending on market conditions and specifications.
Contact us for a real-time quote based on your exact size and quantity requirements.
Why Choose Our 1070 Aluminum Circles?
We are a professional aluminum circle manufacturer and exporter. We supply 1070 aluminum circles to cookware manufacturers, lighting companies, and industrial buyers worldwide.
Our Advantages
✅ High Purity Raw Material
We use only certified 1070 aluminum ingots. Every batch is tested for chemical composition before production.
✅ Precise Dimensions
Our circles are cut and trimmed to exact specifications. Diameter tolerance is ±0.5 mm. Thickness tolerance follows EN 485-2 standards.
✅ Smooth Edge Quality
All circles have smooth, burr-free edges. This protects tooling and improves deep drawing performance.
✅ Consistent Surface Finish
No scratches, pits, or oil stains. Our surface quality meets the requirements of hard anodizing processes.
✅ Flexible Order Sizes
We accept trial orders and large volume orders. MOQ is negotiable based on your requirements.
✅ Fast Delivery
Standard sizes ship within 7–15 days. Custom sizes are available within 20–30 days.
✅ Global Export Experience
We export to Southeast Asia, the Middle East, Europe, Africa, and South America. We handle all export documentation including Mill Test Reports, CO, and packing lists.
Our 1070 Aluminum Circle Product Range
| Product | Diameter Range | Thickness Range | Temper |
|---|---|---|---|
| Standard Circles | 100 – 800 mm | 0.5 – 4.0 mm | O, H14 |
| Large Circles | 800 – 1200 mm | 2.0 – 6.0 mm | O, H12 |
| Bright Finish Circles | 150 – 600 mm | 0.8 – 3.0 mm | O |
| Custom Circles | Any size | Any thickness | Any temper |
Frequently Asked Questions
What is 1070 aluminum?
1070 aluminum is a high-purity aluminum alloy containing at least 99.7% aluminum. It belongs to the 1000 series (pure aluminum series). It is known for its excellent formability, high thermal and electrical conductivity, and outstanding corrosion resistance.
What is the difference between 1050 and 1070 aluminum?
The main difference is purity. 1070 contains at least 99.7% aluminum while 1050 contains at least 99.5%. 1070 is softer, more formable, and conducts heat and electricity better. 1050 is slightly stronger. For premium cookware, 1070 is the preferred choice.
What are the different types of aluminum alloy?
Aluminum alloys are grouped into series based on their main alloying elements:
- 1000 series — Pure aluminum (1050, 1060, 1070, 1100)
- 2000 series — Copper alloys (2024)
- 3000 series — Manganese alloys (3003, 3105)
- 5000 series — Magnesium alloys (5052, 5083)
- 6000 series — Magnesium + Silicon alloys (6061, 6063)
- 7000 series — Zinc alloys (7075)
What is the difference between 7000 series and 6000 series aluminum?
7000 series aluminum uses zinc as the main alloying element and is the strongest aluminum alloy group. 7075 can reach tensile strengths above 500 MPa. 6000 series uses magnesium and silicon and offers a balance of strength, extrudability, and corrosion resistance. 6061 and 6063 are the most common 6000 series alloys. 7000 series is used in aerospace and defense. 6000 series is used in construction, transportation, and general manufacturing.
Can 1070 aluminum circle be anodized?
Yes. 1070 aluminum anodizes very well. The high purity produces a clear, uniform anodized layer. Hard anodizing is commonly used on cookware made from 1070 aluminum circles.
What temper is best for deep drawing 1070 aluminum circles?
O temper (fully annealed) is best for deep drawing. It offers maximum elongation and minimum yield strength, which allows the material to flow into molds without cracking.
Summary
1070 aluminum circle is the preferred raw material for cookware, lighting reflectors, road signs, and many other formed aluminum products. Its 99.7% purity gives it exceptional thermal conductivity, outstanding formability, and excellent corrosion resistance.
Whether you need standard sizes or custom dimensions, O temper or hard temper, mill finish or bright finish — we can supply 1070 aluminum circles that meet your exact requirements.
Contact our team today for specifications, samples, and pricing. We are ready to support your production with reliable quality and on-time delivery.
