Aluminum 1350
AA 1350 · UNS A91350 · EN AW-1350, AW 1350 · JIS A1350 · BS 1E
1350 is an electrical-conductor (EC) grade of commercially pure aluminum, minimum 99.50 % Al, in which Si, Cu, Mn, Cr, V and Ti are deliberately capped because they lower conductivity; annealed volume conductivity is about 62 % IACS (EN AW-1350, A91350, 3.0257).
1350 tempers and conditions
1350 is supplied in 14 conditions, soft to hard.
Compare all 14 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum conductivity and ductility: drawing stock, annealed cable conductors, flexible foil/strip and formed shapes. | 28 | 83 | 23 | 20 HB | 62 % IACS |
As fabricated | As-fabricated 1350 (extruded bar, rod or bus conductor) with no mechanical property limits guaranteed; properties depend on the working history. | 40 | 90 | 25 | 21 HB | 62 % IACS |
Strain hardened from hot working only | Heavy extruded or hot-rolled bus bar, rod and tube supplied with guaranteed minima but no deliberate cold work. | 55 | 90 | 25 | 22 HB | 61.9 % IACS |
Slightly strain hardened | Standard temper for extruded 1350 bus bar, tube and shapes (ASTM B317/B236) — good conductivity with enough stiffness for bolted joints. | 65 | 95 | 20 | 25 HB | 61.8 % IACS |
Strain hardened and partially annealed, quarter hard | Cold-worked then partially annealed to quarter-hard 1350; slightly more ductile and stable than H12 at the same strength level. | 76 | 97 | 12 | 25 HB | 62 % IACS |
Strain hardened, quarter hard | Light cold work for slightly stiffer strip, rod or tube that must still bend and form easily. | 83 | 97 | 12 | 27 HB | 61.8 % IACS |
Strain hardened and partially annealed, half hard | Half-hard 1350 obtained by cold work plus partial anneal; balances conductor strength with better bend ductility than H14. | 90 | 110 | 10 | 28 HB | 61.8 % IACS |
Strain hardened and partially annealed, half hard, special limits | Half-hard partially annealed 1350 to product-specific (bus/strip conductor) limits; properties close to H24 with tighter ductility control. | 90 | 110 | 10 | 28 HB | 61.8 % IACS |
Strain hardened, half hard, special limits | Half-hard cold-worked 1350 with the third-digit '2' denoting product-specific (conductor/bus) mechanical limits between H14 and H24 practice. | 97 | 110 | 8 | 28 HB | 61.8 % IACS |
Strain hardened, half hard | Middle-of-road temper for electrical strip, washers and lightly formed conductor parts needing some stiffness. | 97 | 110 | 9 | 32 HB | 61.8 % IACS |
Strain hardened and partially annealed, three-quarter hard | Three-quarter hard 1350 produced by cold work plus partial anneal; higher strength conductor strip with moderate residual ductility. | 105 | 124 | 8 | 32 HB | 61.8 % IACS |
Strain hardened, three-quarter hard | Higher-strength strip/rod where only mild forming (gentle bends) is required. | 110 | 124 | 6 | 38 HB | 61.5 % IACS |
Strain hardened, full hard | Fully cold-worked (about 75 % reduction) 1350 sheet, strip and wire — hard temper conductor with low ductility and near-maximum strength. | 124 | 138 | 6 | 35 HB | 61.8 % IACS |
Strain hardened, extra hard | The standard hard-drawn conductor temper: AAC/ACSR overhead wire and stranded cable where tensile strength at 61 % IACS minimum is required. | 165 | 186 | 1.7 | 45 HB | 61.4 % IACS |
What is 1350?
1350 is an electrical-conductor (EC) grade of commercially pure aluminum, minimum 99.50 % Al, in which Si, Cu, Mn, Cr, V and Ti are deliberately capped because they lower conductivity; annealed volume conductivity is about 62 % IACS (EN AW-1350, A91350, 3.0257). It is the reference material for overhead line conductors, cable conductors and busbar, chosen for conductivity per unit mass, very high ductility, drawing to very fine wire and easy extrusion into bus sections. Strength is low — even H19 cold-worked material reaches only about 185 MPa UTS — it anneals and softens in long service above 100 °C, creep relaxes bolted joints, and direct contact with copper causes galvanic corrosion. 1350 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). 1350 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 186 MPa (27 ksi) — weaker than 58% of aluminum grades. Elongation at break is 1.7% and the elastic modulus is 69 GPa (10 Msi).
What is 1350 used for?
- Overhead power transmission conductors
- Extruded busbar
- Cable and stranded conductors
- Switchgear and panel bus connections
- Drawn conductor wire
- Transformer and substation terminal bars
- Grounding and bonding conductors
Advantages
- High electrical conductivity — 61.4 % IACS, better than 97% of aluminum grades
- Conducts heat well — 230 W/m·K (132.9 BTU/hr·ft·°F), better than 96% of aluminum grades
- Readily welded — 90/100, better than 90% of aluminum grades
- Good corrosion resistance — 72/100, better than 83% of aluminum grades
Limitations
- Limited service temperature — 90°C (194 °F), worse than 93% of aluminum grades
- Limited ductility — 1.7%, worse than 90% of aluminum grades
- Difficult to machine — 40/100, worse than 81% of aluminum grades
1350 properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
1350 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
1350 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 186 MPa (27 ksi) — weaker than 58% of aluminum grades. Elongation at break is 1.7% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1350 is rated for continuous service to 90°C (194 °F). It conducts heat at 230 W/m·K (132.9 BTU/hr·ft·°F), better than 96% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1350 conducts electricity at 61.4 % IACS, better than 97% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 83% of aluminum grades.
Sustainability4
Producing a kilogram of 1350 takes about 210 MJ of energy and emits 12.5 kg of CO₂ — more than 88% of aluminum grades. Typical recycled content is 8%.
Manufacturability7
1350's machinability is fair (40/100, worse than 81% of aluminum grades); weldability excellent (90/100); formability poor (25/100).
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. 1350 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1350
Is 1350 easy to machine?
Very soft and gummy — use polished high-rake carbide, high speed, flood lubrication and sharp edges to avoid built-up edge and burrs; drilled bus bar holes should be deburred to prevent hot spots.
Can 1350 be welded?
Excellent with GTAW/GMAW using 1100 or 4043 filler and He/Ar; weld metal has lower strength but near-parent conductivity, so bus joints are often welded rather than bolted.
Can 1350 be formed, bent or molded?
Outstanding cold formability in O/H111 (deep bends, drawing to fine wire); H19 wire is essentially non-formable and will crack on tight bends — form before final drawing or re-anneal.
Manufacturability
The process limits FabDigit applies to 1350. Every 1350 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Fair40 / 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 | Excellent25 / 100 |
|---|---|
| Weldability | Excellent90 / 100 |
| Bendable | Yes |
1350 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. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Si | ≤ 0.1 | 0.05 |
| Fe | ≤ 0.4 | 0.2 |
| Cu | ≤ 0.05 | 0.01 |
| Mn | ≤ 0.01 | |
| Cr | ≤ 0.01 | |
| Zn | ≤ 0.05 | |
| Bmax; boron treatment used to remove V/Ti | ≤ 0.05 | |
| Ga | ≤ 0.03 | |
| V+Ticombined max — strongly degrades conductivity | ≤ 0.02 | |
| Others (each)each | ≤ 0.03 | |
| Al99.50 % min | ≥ 99.5 (balance) |
What surface finishes work on 1350?
Anodizes bright but the film is insulating, so conductor surfaces are left bare, tin/silver plated, or grease-protected; bolted joints need wire-brushing plus joint compound and Belleville washers to counter creep.
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 1350 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A91350
- Aluminum Association
- AA1350
- EN / DIN / Werkstoff-Nr.
- AW-1350AW 1350E-Al99.53.0257
- BS
- 1E
- JIS
- A1350
- Trade names
- EC
How much does 1350 cost?
1350 is a budget-cost aluminum ($), cheaper than about 99% 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.
1350 — frequently asked
What is 1350 used for?
1350 is typically used for overhead power transmission conductors, extruded busbar, cable and stranded conductors, switchgear and panel bus connections, drawn conductor wire and transformer and substation terminal bars. In short: EC grade; 61% IACS conductivity.
What is the yield strength of 1350?
1350 has a typical yield strength of 165 MPa (23.9 ksi) and a tensile strength of 186 MPa (27 ksi) — weaker than 58% of aluminum grades. Strength varies by condition: see the 14 listed tempers.
Is 1350 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 81% of aluminum grades). Very soft and gummy — use polished high-rake carbide, high speed, flood lubrication and sharp edges to avoid built-up edge and burrs; drilled bus bar holes should be deburred to prevent hot spots.
Can 1350 be welded?
Yes — weldability is rated excellent (90/100). Excellent with GTAW/GMAW using 1100 or 4043 filler and He/Ar; weld metal has lower strength but near-parent conductivity, so bus joints are often welded rather than bolted.
What surface finishes work on 1350?
Anodizes bright but the film is insulating, so conductor surfaces are left bare, tin/silver plated, or grease-protected; bolted joints need wire-brushing plus joint compound and Belleville washers to counter creep.
Can 1350 be formed, bent or molded?
Outstanding cold formability in O/H111 (deep bends, drawing to fine wire); H19 wire is essentially non-formable and will crack on tight bends — form before final drawing or re-anneal.
What is the maximum service temperature of 1350?
1350 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 1350 cost?
1350 is a budget-cost aluminum ($), cheaper than about 99% 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 1350?
Yes — 1350 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
- Aluminum Association Teal Sheets — International Alloy Designations and Chemical Composition Limits for Wrought Aluminum — The Aluminum Association (2018)
- ASTM B230/B230M — Aluminum 1350-H19 Wire for Electrical Purposes — ASTM (2020)
- ASTM B233 — Aluminum 1350 Drawing Stock for Electrical Purposes — ASTM (2020)
- ASTM B317/B317M — Aluminum Alloy Extruded Bar, Rod, Pipe and Structural Shapes for Electrical Purposes (Bus Conductor) — ASTM (2019)
- ASTM B609/B609M — Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes — ASTM (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (1350 data sheet) — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (aluminium galvanic data) — ASM International (2005)
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.