1370 aluminum wire (EN AW-1370 / Al99.7) is a high-purity electrical conductor grade with a minimum aluminum content of 99.7%. It delivers excellent electrical conductivity (61.5–63% IACS), high ductility for drawing and stranding, and is widely used in overhead transmission lines, power cables, magnet wire, and busbar applications. Linsy supplies 1370 aluminum wire in tempers O (annealed), H14 (1/2 hard), H18 (full hard), and H19 (extra hard), with custom diameters, coil packaging, and MTC reports available.
Formulários disponíveis: round wire
Temperamentos comuns: O (annealed) / H14 / H18 / H19
Diameter range: 0.8 – 30 mm
Suporte ao processamento: drawing / stranding / cutting / annealing
Documentos de qualidade: Relatório MTC com cada pedido, teste SGS mediante solicitação
1370 aluminum (EN AW-1370 / Al99.7) is a high-purity wrought aluminum alloy belonging to the 1000 series. It contains a minimum of 99.7% aluminum, making it one of the purest grades used in commercial wire production. Unlike alloyed grades such as 1350 or 6101, 1370’s near-pure composition delivers the highest attainable electrical conductivity—up to 63% IACS (International Annealed Copper Standard)—combined with excellent ductility for fine wire drawing and multi-strand conductor fabrication.
1370 wire is produced in both annealed (O temper) and strain-hardened conditions (H14, H18, H19), allowing buyers to balance conductivity, tensile strength, and elongation across a wide range of electrical conductor applications. It is supplied as spooled or coil-packaged round wire and is approved under major standards including EN 573-3, GB/T 3190, and ASTM B233 (for conductor-grade aluminum wire).
Linsy supplies 1370 aluminum round wire in multiple tempers and diameters. Coil weight, spool dimensions, and packaging type can be customized to your production line and logistics requirements.
| Temperamento | Diâmetro (mm) | Coil Weight (kg) | Typical Condition |
|---|---|---|---|
| O (recozido) | 0.8 – 30 | 50 – 500 | Soft, fully annealed; maximum ductility for drawing and stranding |
| H14 (1/2 Hard) | 0.8 – 30 | 50 – 500 | Strain-hardened to half-hard condition; moderate strength with good formability |
| H18 (Full Hard) | 0.8 – 25 | 50 – 400 | Strain-hardened to full-hard condition; high tensile strength for structural conductors |
| H19 (Extra Hard) | 1.0 – 20 | 50 – 300 | Extra-hard strain-hardened; maximum strength, typical for overhead transmission cable |
1370 aluminum wire is recognized under multiple international designation systems. The table below lists the most commonly referenced equivalents for procurement and specification alignment.
| System | Designação |
|---|---|
| EN (European) | EN AW-1370 / Al99.7 |
| China (GB/T) | 1370 |
| ISO | Al 99.7 |
| UNS | A91370 |
Applicable standards for 1370 aluminum wire:
| Padrão | Scope |
|---|---|
| EN 573-3 | Chemical composition of wrought aluminum and aluminum alloys |
| GB/T 3190 | Chemical composition of wrought aluminum and aluminum alloys (China) |
| ASTM B233 | Standard specification for aluminum 1350-H19 wire for electrical purposes (reference for conductor wire requirements) |
| IEC 60889 | Hard-drawn aluminum wire for overhead line conductors |
| JIS H4160 | Aluminium and aluminium alloy sheets, strips and plates (Japan) — chemical composition reference |
The chemical composition of 1370 aluminum wire conforms to EN 573-3 and GB/T 3190 standards. All values below represent maximum allowable percentages unless otherwise noted.
| Elemento | Máx % |
|---|---|
| Silício (Si) | 0.10 |
| Ferro (Fe) | 0.25 |
| Cobre (Cu) | 0.04 |
| Manganês (Mn) | 0.01 |
| Magnésio (Mg) | 0.01 |
| Cromo (Cr) | 0.01 |
| Zinco (Zn) | 0.04 |
| Titânio (Ti) | — |
| Other Elements (each) | 0.05 |
| Other Elements (total) | 0.15 |
| Alumínio (Al) | Balance (min 99.7%) |
The mechanical properties of 1370 aluminum wire vary significantly with temper condition. The O temper offers the softest condition for wire drawing operations, while H18 and H19 provide the tensile strength required for overhead transmission conductors.
| Temperamento | Resistência à tração (MPa) | Resistência ao escoamento (MPa) | Alongamento (%) | Condutividade Elétrica (% IACS) |
|---|---|---|---|---|
| O (recozido) | 60 – 95 | ≤ 35 | ≥ 23 | ≥ 62.5 |
| H14 (1/2 Hard) | 85 – 120 | 60 – 85 | ≥ 5 | ≥ 61.5 |
| H18 (Full Hard) | 110 – 150 | 90 – 130 | ≥ 2 | ≥ 61.5 |
| H19 (Extra Hard) | 130 – 170 | 110 – 150 | ≥ 2 | ≥ 61.5 |
Choosing the right temper for 1370 aluminum wire depends on your application’s requirements for strength, conductivity, and formability.
| Temperamento | Melhor para | Considerações |
|---|---|---|
| O (recozido) | Wire drawing, stranding, applications requiring cold forming or bending | Lowest strength but highest ductility and elongation; may require subsequent strain-hardening for final application |
| H14 (1/2 Hard) | General-purpose conductors, moderate-strength cable, busbar fabrication | Good balance of strength and formability; most commonly stocked temper for general electrical use |
| H18 (Full Hard) | ACSR conductor core wire, high-strength overhead cable, structural conductor applications | High tensile strength; limited formability; do not attempt cold bending without annealing |
| H19 (Extra Hard) | Overhead transmission lines, long-span ACSR conductors, applications requiring maximum strength-to-weight ratio | Maximum strength; very limited ductility; requires proper handling to avoid surface damage during installation |
1370 aluminum wire achieves 61.5–63% IACS electrical conductivity, placing it among the highest-conductivity aluminum grades commercially available. This is the defining property for its use in power transmission and distribution conductors. The small difference between O-temper and H-temper conductivity means strain-hardening produces only a modest conductivity reduction, allowing users to gain strength without sacrificing most of the electrical efficiency.
With a minimum 99.7% aluminum content, 1370 wire exhibits excellent resistance to atmospheric corrosion in most service environments. The absence of significant alloying elements such as copper or zinc eliminates galvanic corrosion concerns when used in overhead line applications. For environments with aggressive chemical exposure or marine atmospheres, contact Linsy for guidance on protective coatings or alternative alloy recommendations.
The O temper, with elongation exceeding 23%, is designed for redrawing to finer diameters and multi-wire stranding operations. 1370 wire can be drawn multiple passes without intermediate annealing when started from the O condition, reducing processing cost for cable manufacturers. The uniform grain structure of high-purity aluminum supports consistent wire surface quality across long production runs.
1370 aluminum wire exhibits thermal conductivity in the range of 232–234 W/(m·K), which supports efficient heat dissipation in energized conductors. This property helps maintain stable operating temperatures even under high ampacity conditions, contributing to conductor longevity in overhead line and busbar applications.
The combination of high electrical conductivity, light weight, and corrosion resistance makes 1370 aluminum wire suitable for a broad range of electrical conductor and power transmission applications.
| Application | Typical Usage |
|---|---|
| Overhead Transmission Lines | ACSR (Aluminum Conductor Steel Reinforced) and AAAC (All Aluminum Alloy Conductor) cables for high-voltage power grid transmission |
| Power Distribution Cables | Underground and aerial power distribution conductors in residential and industrial networks |
| Condutores trançados | Multi-strand bare and insulated conductors for power generation and substation connections |
| Busbars & Electrical Fittings | Solid and stranded connections in switchgear, transformers, and electrical panel assemblies |
| Fio magnético | Enameled aluminum winding wire for motors, generators, and transformers where weight savings are critical |
| Cable Shielding & Armor | Protective conductive shielding in power cables and communication cables |
1370 aluminum wire is supplied in O temper for downstream redrawing operations. Multiple-pass drawing without intermediate annealing is possible when starting from the O condition. For final wire diameters below 0.5 mm, intermediate annealing may be required depending on your drawing equipment and reduction ratio. Contact Linsy’s technical team with your drawing specifications for temper recommendations.
H14 and harder tempers are suitable for stranding into multi-wire conductors and cables. The wire surface finish is controlled to ensure consistent strand-to-strand contact and uniform twisting performance. For applications requiring high flexibility (e.g., welding cable or flexible power leads), the O temper is recommended.
Standard delivery condition is bright or mill finish. Surface lubricant residue from the drawing process may be present and should be cleaned prior to enameling, coating, or insulation application. Custom surface cleaning, passivation, and anti-oxidation treatments are available on request.
Every 1370 aluminum wire order from Linsy is shipped with a Material Test Certificate (MTC) issued under Linsy Aluminum. The standard MTC includes:
For customers requiring additional third-party verification, SGS test reports are available on request at additional testing cost. Available SGS report types include chemical composition reports, mechanical properties reports, dimensional inspection reports, and RoHS / REACH compliance reports.
Linsy’s quality management system is certified to ISO 9001, ISO 14001, and ISO 45001 standards.
Linsy Aluminum is a Shenzhen-based aluminum factory with more than 20 years of industry experience, supplying aluminum materials to customers in power electronics, general engineering, manufacturing, and industrial applications worldwide.
We support 1370 aluminum wire procurement with:
For 1370 aluminum wire specifications, current pricing, or technical consultation, contact Linsy Aluminum directly. Our team can provide you with a detailed quote within one business day.
Both 1370 and 1350 are high-purity aluminum conductor grades. The key difference is in purity: 1370 requires a minimum of 99.70% aluminum, while 1350 requires a minimum of 99.50%. 1370’s higher purity delivers slightly better electrical conductivity. For most standard conductor applications, 1350 and 1370 are functionally interchangeable, but 1370 is preferred when maximum conductivity is required.
Order the O (annealed) temper for re-drawing operations. The O temper provides maximum ductility and elongation, allowing multiple drawing passes without cracking. If you plan to use the wire in its as-supplied condition without further processing, select the temper that matches your final application requirements (H14 for general conductors, H18/H19 for high-strength applications).
Yes, aluminum conductor wire is a widely used alternative to copper for power transmission and distribution. While aluminum has approximately 61% the conductivity of copper by volume, it is roughly one-third the weight. For equivalent conductivity, an aluminum conductor will be about 1.6 times the cross-section but half the weight of copper. 1370 wire is commonly used in aluminum-to-copper bimetal transition applications.
Linsy supports low-MOQ custom production for non-stock wire diameters. The minimum order quantity depends on the specific diameter and temper. Contact our sales team with your target diameter, temper, and annual volume for a tailored quotation.
1370 is an electrical conductor grade primarily designed for wire drawing and conductor fabrication, not welding filler wire. For aluminum welding wire, consider 4043 or 5356 grades, which are formulated specifically for arc welding. For friction stir welding or other specialized welding methods, please consult our technical team.
Standard packaging includes plastic-wrapped coils on wood or steel spools. Spool dimensions, coil weight, and packaging type (corrugated box, shrink-wrap, palletized) can be customized. Export-grade packaging with moisture protection is available for sea freight shipments.
Stock-standard diameters and tempers can ship within 3–7 business days. Custom specifications typically require 10–60 days depending on alloy, diameter, temper, and order complexity. Your sales representative will confirm the specific lead time when you request a quote.
Yes. Every 1370 aluminum wire order is shipped with an MTC (Material Test Certificate) issued under Linsy Aluminum. The MTC includes chemical composition analysis, mechanical properties test results, electrical conductivity measurement, and dimensional conformance.
Yes. Standard delivery is mill finish or bright finish. Anti-oxidation coatings, passivation, and custom surface treatments are available on request. Please specify your surface treatment requirements at the quotation stage.
Standard payment terms are T/T (telegraphic transfer) with 30% deposit and 70% balance before shipment, or L/C (letter of credit) for qualified buyers. Other payment arrangements may be available for long-term supply agreements.
Vantagens da Linsy
A Linsy Aluminum é uma fornecedora líder de produtos de processamento de alumínio, atendendo a diversos setores, incluindo aeroespacial, engenharia geral, automotivo, marítimo, construção naval e outras aplicações industriais especializadas.
Temos o compromisso de manter os mais altos padrões de qualidade e responsabilidade ambiental, conforme demonstrado por nossas certificações: ISO 9001:2008， ISO 14001:2004 e SGS.
