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1350
Aluminum 1350 – Electrical Conductor Grade Coil
1350-H19 / 1350-O
Overview
Aluminum 1350 (formerly EC grade) is the standard aluminum alloy for electrical conductors. With a minimum 99.50% aluminum content and 61% IACS electrical conductivity, it is the highest-conductivity aluminum alloy available. 1350 is the alloy used in overhead power transmission lines (ACSR conductor), transformer windings, and electrical bus conductor applications where maximum conductivity is the primary requirement. Its low strength limits seamless use, but its conductivity-to-weight ratio makes it the standard for electrical applications.
Chemical Composition
| Element | Min | Max |
|---|---|---|
| Aluminum (Al) | 99.50% | — |
| Silicon (Si) | — | 0.10% |
| Iron (Fe) | — | 0.40% |
| Copper (Cu) | — | 0.05% |
Alloy Designations
UNSA91350
ASTMB233, B609
Common NameEC Aluminum / Electrical Conductor
Mechanical Properties
Tensile Strength (H19)27 ksi (186 MPa)
Yield Strength (H19)24 ksi (165 MPa)
Tensile Strength (O)12 ksi (83 MPa)
Elongation (O)23%
Physical Properties
Density2.70 g/cm³ (0.098 lb/in³)
Melting Point646–657°C (1,195–1,215°F)
Electrical Conductivity61% IACS
Thermal Conductivity234 W/m·K
Modulus of Elasticity68.9 GPa
Typical Applications
- Overhead power transmission lines (ACSR)
- Transformer windings
- Electrical bus conductor
- Cable and wire
- Generator and motor windings
Fabrication & Joining
- Excellent electrical conductivity — highest of any aluminum alloy
- Good formability for wire drawing
- Not heat-treatable — strengthened by cold work
- Weldable with care
- Low strength — not for seamless applications