Aluminum 1370-H16
Temper
AA 1370 · EN AW-1370, AW 1370
H16 = strain hardened, three-quarter hard
Three-quarter hard strip for stamped terminals and lightly formed conductive parts.
Values for the H16 condition
Other 1370 tempers and conditions
1370 is listed in 7 conditions; see the grade overview at 1370.
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 |
H16This page 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-H16?
1370-H16 is 1370 in the H16 temper — three-quarter hard strip for stamped terminals and lightly formed conductive parts. 1370-H16 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 120 MPa (17.4 ksi) — weaker than 84% of aluminum grades. Elongation at break is 6% and the elastic modulus is 69 GPa (10 Msi). 1370-H16 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
- High electrical conductivity — 61.9 % IACS, better than 99% of aluminum grades
- Conducts heat well — 232 W/m·K (134 BTU/hr·ft·°F), better than 98% of aluminum grades
- Polishes to a fine finish — 85/100, better than 96% of aluminum grades
- Good corrosion resistance — 70/100, better than 79% of aluminum grades
- Readily welded — 82/100, better than 76% of aluminum grades
Limitations
- Limited service temperature — 100°C (212 °F), worse than 91% of aluminum grades
- Difficult to machine — 33/100, worse than 87% of aluminum grades
- Low strength — 105 MPa (15.2 ksi), worse than 84% of aluminum grades
1370-H16 properties
Typical room-temperature values for 1370-H16; 17 are specific to this condition. Other listed values are 1370 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
1370-H16 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-H16 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 120 MPa (17.4 ksi) — weaker than 84% of aluminum grades. Elongation at break is 6% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1370-H16 is rated for continuous service to 100°C (212 °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-H16 conducts electricity at 61.9 % IACS, better than 99% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 79% of aluminum grades.
Sustainability4
Producing a kilogram of 1370-H16 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-H16's machinability is poor (33/100, worse than 87% of aluminum grades); weldability very good (82/100); formability good (58/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1370-H16
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.
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.
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) |
1370-H16 — frequently asked
What is 1370-H16 used for?
1370-H16 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-H16?
1370-H16 has a typical yield strength of 105 MPa (15.2 ksi) and a tensile strength of 120 MPa (17.4 ksi) — weaker than 84% of aluminum grades. Strength varies by condition: see the 7 listed tempers.
Is 1370-H16 easy to machine?
Not especially — machinability is rated poor (33/100, worse than 87% 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-H16 be welded?
Yes — weldability is rated very good (82/100). 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-H16?
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-H16 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-H16?
1370-H16 is rated for continuous use to about 100°C (212 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 1370-H16?
Yes — 1370-H16 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.