Aluminum 1350 · supply condition
Aluminum 1350-H26
Properties of the H26 condition, compared with the other 1350 tempers.
Three-quarter hard 1350 produced by cold work plus partial anneal; higher strength conductor strip with moderate residual ductility.
What is 1350-H26?
1350-H26 is 1350 supplied in the H26 condition — three-quarter hard 1350 produced by cold work plus partial anneal; higher strength conductor strip with moderate residual ductility. 1350-H26 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 124 MPa (18 ksi) — weaker than 84% of aluminum grades. Elongation at break is 8% and the elastic modulus is 68.9 GPa (9.99 Msi). 1350-H26 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).
Advantages
- Conducts heat well — 231 W/m·K (133.5 BTU/hr·ft·°F), better than 98% of aluminum grades
- High electrical conductivity — 61.8 % IACS, better than 98% of aluminum grades
- Readily welded — 89/100, better than 87% of aluminum grades
- Good corrosion resistance — 72/100, better than 83% of aluminum grades
Limitations
- Limited service temperature — 110°C (230 °F), worse than 89% of aluminum grades
- Low strength — 105 MPa (15.2 ksi), worse than 84% of aluminum grades
- Difficult to machine — 42/100, worse than 77% of aluminum grades
1350-H26 properties
Typical room-temperature values for 1350-H26 — 25 properties are specific to this condition; the rest are grade-level values shared by every 1350 temper. Each bar shows where the value sits among the aluminum grades in FabDigit's library — further right is higher.
Physical3
1350-H26 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-H26 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 124 MPa (18 ksi) — weaker than 84% of aluminum grades. Elongation at break is 8% and the elastic modulus is 68.9 GPa (9.99 Msi).
Thermal6
1350-H26 is rated for continuous service to 110°C (230 °F). It conducts heat at 231 W/m·K (133.5 BTU/hr·ft·°F), better than 98% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1350-H26 conducts electricity at 61.8 % IACS, better than 98% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 83% of aluminum grades.
Sustainability4
Producing a kilogram of 1350-H26 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-H26's machinability is fair (42/100, worse than 77% of aluminum grades); weldability excellent (89/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 1350 tempers and conditions
1350 is also supplied in 13 other conditions. The full side-by-side table is on the 1350 overview.
- H19The standard hard-drawn conductor temper: AAC/ACSR overhead wire and stranded cable where tensile strength at 61 % IACS minimum is required.165 MPa yield · 45 HB
- H18Fully cold-worked (about 75 % reduction) 1350 sheet, strip and wire — hard temper conductor with low ductility and near-maximum strength.124 MPa yield · 35 HB
- H16Higher-strength strip/rod where only mild forming (gentle bends) is required.110 MPa yield · 38 HB
- H26Three-quarter hard 1350 produced by cold work plus partial anneal; higher strength conductor strip with moderate residual ductility.105 MPa yield · 32 HB
- H142Half-hard cold-worked 1350 with the third-digit '2' denoting product-specific (conductor/bus) mechanical limits between H14 and H24 practice.97 MPa yield · 28 HB
- H14Middle-of-road temper for electrical strip, washers and lightly formed conductor parts needing some stiffness.97 MPa yield · 32 HB
- H24Half-hard 1350 obtained by cold work plus partial anneal; balances conductor strength with better bend ductility than H14.90 MPa yield · 28 HB
- H242Half-hard partially annealed 1350 to product-specific (bus/strip conductor) limits; properties close to H24 with tighter ductility control.90 MPa yield · 28 HB
- H12Light cold work for slightly stiffer strip, rod or tube that must still bend and form easily.83 MPa yield · 27 HB
- H22Cold-worked then partially annealed to quarter-hard 1350; slightly more ductile and stable than H12 at the same strength level.76 MPa yield · 25 HB
- H111Standard temper for extruded 1350 bus bar, tube and shapes (ASTM B317/B236) — good conductivity with enough stiffness for bolted joints.65 MPa yield · 25 HB
- H112Heavy extruded or hot-rolled bus bar, rod and tube supplied with guaranteed minima but no deliberate cold work.55 MPa yield · 22 HB
- FAs-fabricated 1350 (extruded bar, rod or bus conductor) with no mechanical property limits guaranteed; properties depend on the working history.40 MPa yield · 21 HB
- OPick for maximum conductivity and ductility: drawing stock, annealed cable conductors, flexible foil/strip and formed shapes.28 MPa yield · 20 HB
Working with 1350-H26
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.
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.
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) | — |
1350-H26 — frequently asked
What is 1350-H26 used for?
1350-H26 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-H26?
1350-H26 has a typical yield strength of 105 MPa (15.2 ksi) and a tensile strength of 124 MPa (18 ksi) — weaker than 84% of aluminum grades. Strength varies by condition: see the 14 listed tempers.
Is 1350-H26 easy to machine?
Not especially — machinability is rated fair (42/100, worse than 77% 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-H26 be welded?
Yes — weldability is rated excellent (89/100). 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-H26?
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-H26 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-H26?
1350-H26 is rated for continuous use to about 110°C (230 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 1350-H26?
Yes — 1350-H26 is available for CNC machining and sheet metal with instant online pricing. 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.