Aluminum 1370
AA 1370 · EN AW-1370, AW 1370
1370 is an electrical-conductor (EC) grade unalloyed aluminium with a minimum 99.70 % Al and tightly capped Cu, Mn, Cr, Ti and V so that the guaranteed volume conductivity (≈62 % IACS annealed) is met.
1370 tempers and conditions
1370 is supplied in 7 conditions, soft to hard.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum conductivity, flexibility and deep-forming: flexible cable, winding strip, foil and formed busbar. | 25 | 70 | 35 | 20 HB | 62.3 % IACS |
As fabricated | Extruded busbar and hot-rolled sections where mechanical properties are not guaranteed, only chemistry and conductivity. | 35 | 80 | 28 | 22 HB | 62 % IACS |
Strain hardened, quarter hard | Lightly work-hardened strip/wire when O is too soft to handle but full forming ductility is still needed. | 75 | 92 | 14 | 26 HB | 62 % IACS |
Strain hardened, half hard | Half-hard strip/plate busbar giving a balance of stiffness in handling and bendability. | 90 | 105 | 10 | 30 HB | 61.9 % IACS |
Strain hardened, three-quarter hard | Three-quarter hard strip for stamped terminals and lightly formed conductive parts. | 105 | 120 | 6 | 34 HB | 61.9 % IACS |
Strain hardened, full hard | Full-hard strip and foil (e.g. capacitor/cable-shield foil) where flatness and strength beat ductility. | 125 | 140 | 4 | 37 HB | 61.8 % IACS |
Strain hardened, extra hard | Standard hard-drawn conductor wire/strand: highest strength for overhead and stranded cable, but limited to ~90 °C continuous. | 155 | 175 | 2 | 40 HB | 61.8 % IACS |
What is 1370?
1370 is an electrical-conductor (EC) grade unalloyed aluminium with a minimum 99.70 % Al and tightly capped Cu, Mn, Cr, Ti and V so that the guaranteed volume conductivity (≈62 % IACS annealed) is met. It is drawn into wire, stranded conductors, busbar and transformer/motor winding strip where conductivity per unit mass, formability and low cost matter more than strength. Limits are very low strength (soft in O temper, and H19 hard-drawn wire loses its work hardening above ~100 °C), high creep/stress-relaxation at bolted joints, poor machinability and no heat-treat strengthening option. 1370 has a density of 2.71 g/cm³ (0.0977 lb/in³), lighter than 54% of aluminum grades. It melts at 646°C (1,195 °F). 1370 has a yield strength of 155 MPa (22.5 ksi) and a tensile strength of 175 MPa (25.4 ksi) — weaker than 63% of aluminum grades. Elongation at break is 2% and the elastic modulus is 69 GPa (10 Msi).
What is 1370 used for?
- Drawn conductor wire
- Stranded power cable conductors
- Busbar
- Transformer winding strip
- Motor and coil winding strip
- Extruded conductor rod
- Earthing conductors
Advantages
- Conducts heat well — 232 W/m·K (134 BTU/hr·ft·°F), better than 98% of aluminum grades
- High electrical conductivity — 61.8 % IACS, better than 98% of aluminum grades
- Polishes to a fine finish — 85/100, better than 96% of aluminum grades
- Readily welded — 90/100, better than 90% of aluminum grades
- Good corrosion resistance — 70/100, better than 79% of aluminum grades
Limitations
- Limited service temperature — 90°C (194 °F), worse than 93% of aluminum grades
- Difficult to machine — 30/100, worse than 92% of aluminum grades
- Limited ductility — 2%, worse than 87% of aluminum grades
1370 properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
1370 has a density of 2.71 g/cm³ (0.0977 lb/in³), lighter than 54% of aluminum grades. It melts at 646°C (1,195 °F).
Mechanical10
1370 has a yield strength of 155 MPa (22.5 ksi) and a tensile strength of 175 MPa (25.4 ksi) — weaker than 63% of aluminum grades. Elongation at break is 2% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1370 is rated for continuous service to 90°C (194 °F). It conducts heat at 232 W/m·K (134 BTU/hr·ft·°F), better than 98% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1370 conducts electricity at 61.8 % IACS, better than 98% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 79% of aluminum grades.
Sustainability4
Producing a kilogram of 1370 takes about 210 MJ of energy and emits 12.5 kg of CO₂ — more than 88% of aluminum grades. Typical recycled content is 5%.
Manufacturability7
1370's machinability is poor (30/100, worse than 92% of aluminum grades); weldability excellent (90/100); formability fair (45/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 1370 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1370
Is 1370 easy to machine?
Soft and gummy — use polished high-rake carbide, high speed, low feed pressure and flood lubricant to avoid built-up edge and smearing; not a screw-machine material.
Can 1370 be welded?
Excellent with TIG/MIG using 1100 or 1188 filler, or by cold/friction/ultrasonic and exothermic (Cadweld) methods for conductors; hard tempers recrystallize and lose strength in the HAZ.
Can 1370 be formed, bent or molded?
Outstanding cold formability in O temper (deep drawing, foil rolling, wire drawing with 10–20 % reductions); anneal 340–410 °C to reset work hardening.
Manufacturability
The process limits FabDigit applies to 1370. Every 1370 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Fair30 / 100 |
|---|---|
| ISO material group | N.1 |
| Cutting speed (rough / finish) | 350 / 420 m/min |
| Minimum wall | 0.5 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 8× diameter |
| Best surface (machined / polished) | Ra 0.8 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Excellent45 / 100 |
|---|---|
| Weldability | Excellent90 / 100 |
| Bendable | Yes |
1370 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance.
| Element | Spec limit (wt %) |
|---|---|
| Si | ≤ 0.1 |
| Fe | ≤ 0.25 |
| Cu | ≤ 0.02 |
| Mn | ≤ 0.01 |
| Mg | ≤ 0.02 |
| Cr | ≤ 0.01 |
| Zn | ≤ 0.04 |
| B | ≤ 0.02 |
| Ga | ≤ 0.03 |
| V+Ticombined max (conductivity-critical elements) | ≤ 0.02 |
| Others (each)each | ≤ 0.01 |
| Almin 99.70 %; minimum volume conductivity ≈61 %IACS (hard drawn) / 62 %IACS (annealed) | ≥ 99.7 (balance) |
What surface finishes work on 1370?
Takes bright clear or hard anodizing very well; for electrical joints prefer tin or silver plating and abrasive cleaning plus joint compound rather than an insulating anodic film.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Conversion Coating
PVD Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 1370 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Aluminum Association
- AA1370
- EN / DIN / Werkstoff-Nr.
- AW-1370AW 1370Al99.70E
How much does 1370 cost?
1370 is a budget-cost aluminum ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1370 — frequently asked
What is 1370 used for?
1370 is typically used for drawn conductor wire, stranded power cable conductors, busbar, transformer winding strip, motor and coil winding strip and extruded conductor rod. In short: high-conductivity wire; drawn rod.
What is the yield strength of 1370?
1370 has a typical yield strength of 155 MPa (22.5 ksi) and a tensile strength of 175 MPa (25.4 ksi) — weaker than 63% of aluminum grades. Strength varies by condition: see the 7 listed tempers.
Is 1370 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 92% of aluminum grades). Soft and gummy — use polished high-rake carbide, high speed, low feed pressure and flood lubricant to avoid built-up edge and smearing; not a screw-machine material.
Can 1370 be welded?
Yes — weldability is rated excellent (90/100). Excellent with TIG/MIG using 1100 or 1188 filler, or by cold/friction/ultrasonic and exothermic (Cadweld) methods for conductors; hard tempers recrystallize and lose strength in the HAZ.
What surface finishes work on 1370?
Takes bright clear or hard anodizing very well; for electrical joints prefer tin or silver plating and abrasive cleaning plus joint compound rather than an insulating anodic film.
Can 1370 be formed, bent or molded?
Outstanding cold formability in O temper (deep drawing, foil rolling, wire drawing with 10–20 % reductions); anneal 340–410 °C to reset work hardening.
What is the maximum service temperature of 1370?
1370 is rated for continuous use to about 90°C (194 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1370 cost?
1370 is a budget-cost aluminum ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in 1370?
Yes — 1370 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 573-3 — Aluminium and aluminium alloys, chemical composition (EN AW-1370 / EAl99.7) — CEN (2019)
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 1715-2 — Aluminium and aluminium alloys, drawing stock (wire) for electrical purposes — CEN (2010)
- IEC 60889 — Hard-drawn aluminium wire for overhead line conductors — IEC (1987)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (1000 series EC grades) — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.