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1370 Aluminum Alloy: Properties, Uses, and Benefit
1370 Aluminum Alloy: Properties, Uses, and Benefit
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Premium Alu..
2 posts
Aug 21, 2026
10:55 AM
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What Is 1370 Aluminum Alloy?
1370 aluminum is a high-purity aluminum alloy from the 1000 series. It is also known as Al99.7 because it contains a minimum of 99.7% aluminum. This high purity gives the alloy excellent electrical conductivity, good corrosion resistance, and easy formability.
Unlike heat-treatable aluminum alloys, 1370 gets its strength through cold working, also called strain hardening. It is commonly supplied in O, H12, H14, H18, and H111 tempers. Depending on the project, Premium Alu can supply 1370 aluminum as wire, rod, bar, sheet, or coil.
1370 Aluminum Purity 99.7 Percent
One of the main reasons manufacturers choose 1370 is its high purity. 1370 aluminum purity 99.7 percent means that only a small amount of other elements are present. Low levels of impurities help maintain good electrical conductivity.
In annealed condition, 1370 can provide electrical conductivity of around 61% IACS. It also has the natural corrosion resistance expected from high-purity aluminum. When exposed to air, aluminum forms a thin oxide layer that protects the surface from further corrosion.
This combination of conductivity, low weight, and corrosion resistance makes 1370 useful for demanding electrical applications.
Key Properties of 1370 Aluminum
1370 aluminum offers several useful properties for industrial applications:
Electrical conductivity of approximately 61% IACS
Minimum aluminum content of 99.7%
Excellent corrosion resistance
Low density and lightweight construction
Good ductility in O temper
Excellent cold-forming and wire-drawing ability
Non-heat-treatable characteristics
Available in several strain-hardened tempers
The O temper is soft and highly workable, making it suitable for drawing and forming. H12 and H14 provide more strength while retaining useful ductility. H18 is much harder and is often selected for finished conductor applications.
1370 Aluminum for Overhead Power Lines
Electrical transmission is one of the most important uses of this alloy. Aluminum is much lighter than copper, which can make aluminum conductors easier and less expensive to install over long distances.
For applications that need high conductivity, corrosion resistance, and low weight, 1370 can be an excellent conductor material. It can be supplied as wire or rod and processed into different conductor designs according to project requirements.
When choosing the best aluminum for overhead power line conductor, engineers normally consider conductivity, mechanical strength, conductor design, weight, operating conditions, and applicable standards. 1370 is particularly attractive when high-purity electrical-grade aluminum is required.
1370 Aluminum vs 1350 Aluminum
A common question from buyers is about the difference between 1350 and 1370 aluminum. Both are high-purity electrical conductor grades and have similar conductivity characteristics.
The biggest difference is aluminum purity. 1370 contains at least 99.7% aluminum, while 1350 generally contains at least 99.5%. Therefore, 1370 has a slightly higher purity level and may be selected for applications where controlling trace impurities is important.
However, 1350 is more widely available and is commonly used for general electrical conductors, busbars, and cables. The right choice depends on the required electrical, mechanical, dimensional, and standard specifications.
Available 1370 Aluminum Forms and Processing
Premium Alu supplies 1370 aluminum in wire, rod, bar, sheet, and coil forms. Custom diameters, thicknesses, widths, lengths, and coil weights can also be arranged.
Processing options include wire drawing, straightening, precision cutting, and annealing. These services help customers receive material that is closer to their final production requirements.
Quality Control and MTC Reports
Quality documentation is important when buying electrical-grade aluminum. Premium Alu provides a Mill Test Certificate (MTC) with every 1370 aluminum order. The certificate can include chemical composition, mechanical properties, conductivity results, dimensions, and batch or heat information.
SGS testing can also be arranged when independent inspection is required.
Applications of 1370 Aluminum
1370 is used in many electrical and industrial products, including:
Overhead transmission conductors
Power distribution cables
Transformer and motor windings
Electrical wires
Busbar-related components
Terminals and connectors
Cable shielding
Electrical hardware
Its lightweight structure and strong conductivity make it especially useful where reducing conductor weight matters.
Why Choose Premium Alu for 1370 Aluminum?
Premium Alu focuses on supplying aluminum products for electrical, engineering, and industrial applications. Customers can request different tempers, sizes, forms, and processing requirements based on their projects.
With MTC documentation for every order and optional third-party testing, buyers can have better traceability and confidence in the material they receive.
For projects that require high-purity aluminum with dependable electrical performance, 1370 aluminum is a practical choice worth considering.
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