1370 aluminum alloy (Al99.7) is a high-purity wrought aluminum alloy containing a minimum of 99.7% aluminum, classified within the 1000 series. Primarily used as electrical conductor grade (EC) aluminum, 1370 delivers approximately 61% IACS electrical conductivity, excellent thermal conductivity, and strong corrosion resistance. As a non-heat-treatable alloy, it derives its mechanical properties from strain hardening. Linsy supplies 1370 aluminum wire, rod, bar, sheet, and coil in tempers O, H12, H14, H18, H111, and H112, with custom diameters, coil weights, and MTC reports available for every order.
Beschikbare formulieren: wire / rod / bar / sheet / coil
Veelvoorkomende temperamenten: O / H12 / H14 / H18 / H111
Ondersteuning bij de verwerking: drawing / straightening / precision cutting / annealing
Kwaliteitsdocumenten: MTC-rapport bij elke bestelling, SGS-testrapporten op verzoek verkrijgbaar
1370 aluminum (UNS A91370) is a high-purity wrought aluminum alloy in the 1000 series, designated as Al99.7 by EN standards. With a minimum aluminum content of 99.7%, it is one of the highest-purity commercial aluminum grades used as electrical conductor (EC) material. The alloy is non-heat-treatable and gains strength through work hardening (strain hardening), primarily in H tempers. Its defining feature is electrical conductivity — approximately 61% IACS (International Annealed Copper Standard) in annealed condition — making it the material of choice for a wide range of electrical transmission and power distribution applications where high conductivity, light weight, and corrosion resistance are required.
1370 is manufactured under international standards including ASTM B233 (aluminum 1350/1370 wire for electrical purposes), ASTM B230 (aluminum EC-H19 wire), EN AW-1370, and EN 573-3. It is closely related to 1350 aluminum (Al99.5) but offers slightly higher purity and marginally better conductivity, particularly in applications where minimal trace-impurity resistance is critical.
Linsy supplies 1370 aluminum in the product forms most relevant to electrical, conductor, and wire-drawing applications. All dimensions can be customized to your specifications, with MTC issued for every order.
| Formulier | Temper | Diameter (mm) | Coil Weight (kg) |
|---|---|---|---|
| 1370 Wire | O, H12, H14, H18, H111 | 0.8 – 20 | Min. 50 |
| Formulier | Temper | Diameter (mm) | Lengte (mm) |
|---|---|---|---|
| 1370 Rod / Bar | O, H12, H14, H18, H111 | 3 – 300 | 1000 – 6000 |
| Custom lengths and diameters available on request | |||
| Formulier | Temper | Dikte (mm) | Breedte (mm) | Lengte (mm) |
|---|---|---|---|---|
| 1370 Sheet / Coil | O, H12, H14, H18, H111 | 0.3 – 6.0 | 500 – 2600 | 500 – 16000 |
| Length, width, and thickness can be customized | ||||
| Standaard | Benaming |
|---|---|
| EN (European) | EN AW-1370 / Al99.7 |
| AA (Aluminium Association) | AA 1370 |
| UNS | A91370 |
| ISO | Al 99.7 |
| DIN | Al99.7 |
| Standaard | Scope |
|---|---|
| ASTM B233 | Aluminum 1350/1370 wire for electrical purposes |
| ASTM B230 | Aluminum EC-H19 wire |
| ASTM B609 | Aluminum 1350 bar and rod for electrical applications |
| EN 573-3 | Chemical composition of wrought aluminum alloys |
| Element | Inhoud (%) |
|---|---|
| Silicium (Si) | 0,10 Max. |
| IJzer (Fe) | 0,25 Max. |
| Koper (Cu) | 0,04 Max. |
| Mangaan (Mn) | 0,01 Max |
| Magnesium (Mg) | 0,01 Max |
| Chroom (Cr) | 0,01 Max |
| Zink (Zn) | 0,04 Max. |
| Titanium (Ti) | 0.02 Max (verify) |
| Vanadium (V) | 0,02 Max |
| Others (Each) | 0,03 Max |
| Others (Total) | 0,10 Max. |
| Aluminium (Al) | Balance (min 99.7%) |
Opmerking: Values shown reflect EN AW-1370 / Al99.7 limits. Actual values confirmed by MTC for each shipment.
| Temper | Treksterkte (MPa) | Rek (%) | Typical Application |
|---|---|---|---|
| O (gegloeid) | 60 – 95 | ≥ 25 | Wire drawing stock, soft conductor cores |
| H12 / H14 | 85 – 125 | ≥ 12 | Electrical conductors, general wiring |
| H18 / H19 | 110 – 160 | ≥ 3 | Overhead transmission cable, hard-drawn conductor |
Important: These are typical ranges for 1370 wire and rod products. Actual values depend on diameter, temper, and manufacturing process. MTC reports reflect specific batch results.
| Temper | Beschrijving | Beste voor |
|---|---|---|
| O | Annealed (softest, highest elongation) | Wire drawing, cold forming, cable shielding |
| H12 / H14 | Strain-hardened (quarter-hard / half-hard) | General electrical conductors, rivets, fasteners |
| H18 / H19 | Full-hard / extra-hard | Overhead transmission lines, high-strength conductor applications |
| H111 | Annealed and slightly strain-hardened | Where formability with slight stiffness is needed |
1370 delivers approximately 61% IACS electrical conductivity (minimum 61.0% for EC grade), making it the preferred material for electrical transmission conductors, transformer windings, and power distribution cables. Compared to copper, aluminum conductors weigh about one-third for equivalent current-carrying capacity, reducing support structure and installation costs.
With a minimum aluminum content of 99.7%, 1370 has lower impurity levels than standard 1050 or 1100 aluminum grades. This high purity directly contributes to the alloy’s superior conductivity and corrosion resistance, as trace elements like iron and silicon increase electrical resistivity.
As a high-purity 1000 series aluminum, 1370 forms a protective aluminum oxide layer that provides strong resistance to atmospheric corrosion. It performs well in most outdoor and industrial environments without additional coating, making it suitable for bare overhead power line applications.
1370 is non-heat-treatable and gains strength only through cold working (strain hardening). It offers excellent cold formability in annealed (O) temper, making it ideal for wire drawing, rod drawing, and cold heading operations. Mechanical properties can be adjusted through controlled strain hardening and partial annealing to meet specific electrical conductor requirements.
| Industrie | Application | Why 1370 Is Used |
|---|---|---|
| Power Transmission | Overhead conductors (AAC, AAAC, ACSR core wire), overhead ground wire, busbar conductors | High IACS conductivity, light weight, corrosion resistance |
| Electrical Equipment | Transformer windings, motor windings, magnet wire, insulated cable conductors | High purity, consistent conductivity, good formability for winding |
| Wire & Cable | Building wire, automotive wiring harness conductors, power distribution cables | 61% IACS combined with formability and lightweight |
| Fasteners & Hardware | Electrical-grade rivets, terminals, connectors, clamps, lugs, grounding hardware | Good cold heading behavior, conductivity matching conductor standards |
| Telecommunications | Cable shielding, signal transmission wire | High purity, consistent impedance characteristics |
| Eigendom | 1370 (Al99.7) | 1350 (Al99.5) |
|---|---|---|
| Minimum Aluminum | 99.7% | 99.5% |
| IACS Conductivity | ~61.0% (min) | ~61.0% (typ) |
| Purity Level | Hoger | Standard EC grade |
| Typisch gebruik | High-grade conductors, low-impedance applications | General electrical conductor, busbar, cable |
| Beschikbaarheid | Specialty wire/rod, custom orders | Widely available in standard stock |
Contact Linsy if you need help choosing between 1370 and 1350 based on your conductivity specifications, drawing requirements, or project standards.
1370 is a non-heat-treatable alloy — its mechanical strength is developed entirely through cold working (strain hardening). For wire drawing and rod production, the alloy is typically supplied in annealed (O) temper as feedstock and hardened through controlled draws to the target final size and temper. Key processing considerations:
Every 1370 aluminum shipment from Linsy includes a Mill Test Certificate (MTC) issued after production. The MTC documents the following for your batch:
For projects requiring third-party verification, SGS test reports (chemical composition, mechanical properties, conductivity, dimensional inspection, RoHS + REACH) are available on request with additional testing cost. Linsy operates under ISO 9001 quality management, ISO 14001 environmental management, and ISO 45001 occupational health and safety management systems.
Linsy Aluminum is a Shenzhen-based aluminum factory with more than 20 years of industry experience. We specialize in supplying a full range of aluminum alloys including high-purity 1000 series grades like 1370, with both standard inventory and custom production capabilities.
Our 1370 aluminum products come with consistent quality backed by MTC for every order and optional SGS third-party testing on request. We support low-MOQ custom production for non-stock items, and our typical custom lead time is 10–60 days depending on alloy, dimensions, and processing requirements. We ship to markets across Europe, Asia, the Middle East, South America, and Africa.
1370 aluminum is primarily used as electrical conductor (EC) grade material for overhead power transmission lines, transformer windings, motor windings, cable conductors, and electrical-grade fasteners and connectors. Its 61% IACS conductivity and high purity make it the material of choice for applications where aluminum serves as current-carrying conductor.
1370 aluminum achieves approximately 61% IACS conductivity, meaning it carries about 61% of the current that an equivalent cross-section of copper would carry. However, aluminum is about one-third the weight of copper, so for the same weight, aluminum actually carries more current. At equal conductivity, an aluminum conductor weighs approximately 48% less than copper.
1370 (Al99.7) contains a minimum of 99.7% aluminum, compared to 1350 (Al99.5) at 99.5% minimum. Both are EC (electrical conductor) grades with similar IACS conductivity ratings (~61%). 1370 offers slightly higher purity and may be specified where lower trace-element resistivity is critical. Both are supplied in wire, rod, and bar forms.
No. 1370 belongs to the 1000 series of non-heat-treatable aluminum alloys. It gains mechanical strength solely through strain hardening (cold working). Mechanical properties can be modified by controlling the degree of cold work and by annealing (softening) when required.
Linsy supplies 1370 in O (annealed), H12 (quarter-hard), H14 (half-hard), H18 (full-hard), and H111 (annealed & slightly strain-hardened) tempers. The most common tempers for electrical conductor applications are O for wire drawing feedstock and H14/H18 for finished conductor wire and rod.
Yes. Linsy supports custom diameters, coil weights, and cut lengths for 1370 wire, rod, and bar products. Standard stock spans diameters from 0.8 mm (wire) to 300 mm (bar), and we can produce custom dimensions outside these ranges for qualifying order quantities.
Yes. Every 1370 aluminum shipment from Linsy includes a Mill Test Certificate (MTC) documenting chemical composition, mechanical properties, and IACS conductivity for your specific batch, with full traceability to heat/batch number.
For standard stock sizes, orders can ship within 3–15 days. Custom sizes and non-stock specifications typically require 10–60 days, depending on the alloy, dimensions, processing requirements, and order quantity. Contact Linsy with your specifications for a project-specific lead time estimate.
Linsy supports low-MOQ orders. For wire products, minimum coil weight is typically 50 kg. Exact MOQ varies by product form, size, and temper — contact us with your specifications for a quote.
We accept T/T (bank transfer) and L/C (letter of credit). A 30% deposit is standard with balance payment before shipment or against shipping documents.
We ship by sea freight (FCL and LCL), air freight for urgent orders, and courier service (DHL, FedEx, UPS) for small samples. We work with major shipping lines and can arrange door-to-door delivery.
Yes. Sample orders are available for evaluation. Small quantities can be shipped by air courier. Sample costs may be deducted from subsequent bulk orders.
1370 wire is typically supplied in coils wound on wooden or steel spools, packed in export-grade wooden cases. Rods and bars are bundled with protective wrapping. Custom packing requirements can be accommodated.
Explore the following resources for more information on aluminum alloys and electrical conductor materials:
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Linsy Aluminum is een toonaangevende leverancier van aluminiumverwerkingsproducten en levert aan diverse industrieën, waaronder de ruimtevaart, algemene machinebouw, automobielindustrie, scheepvaart, scheepsbouw en andere gespecialiseerde industriële toepassingen.
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