Aluminum 3103-H26
Supply condition
AA 3103 · UNS A93103 · EN AW-3103, AW 3103 · ISO N3
H26 = strain hardened and partially annealed, three-quarter hard
Stabilised three-quarter hard strip for roll-formed profiles needing some residual ductility.
Values for the H26 condition
Other 3103 tempers and conditions
3103 is listed in 16 conditions; see the grade overview at 3103.
Compare all 16 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum formability — deep drawing, spinning, tight bends and hydroforming. | 45 | 110 | 30 | 28 HB | 50 % IACS |
Strain hardened from hot working only | Hot-rolled plate condition for thicker gauges where a specified minimum, not a cold-rolled temper, is required. | 50 | 110 | 20 | 30 HB | 48 % IACS |
As fabricated | As-fabricated 3103 with no special control of thermal or strain-hardening history and no guaranteed mechanical limits; properties depend on the forming route. | 55 | 110 | 25 | 30 HB | 42 % IACS |
Strain hardened, eighth hard | Lightly cold-worked 3103 sheet just above annealed strength, retaining high formability for deep-drawn and roll-formed parts. | 75 | 115 | 18 | 32 HB | 42 % IACS |
Strain hardened and partially annealed, quarter hard | Stabilised quarter-hard sheet with better ductility than H12 at the same strength class. | 95 | 130 | 12 | 36 HB | 43 % IACS |
Strain hardened, quarter hard | Light work-hardened strip when a bit more stiffness than O is needed but bending is still frequent. | 105 | 130 | 9 | 37 HB | 43 % IACS |
Strain hardened, three-eighths hard | Intermediate cold-rolled 3103 between quarter and half hard, balancing moderate strength with useful bending ductility. | 108 | 132 | 10 | 38 HB | 41.5 % IACS |
Strain hardened and partially annealed, half hard | Most common European roofing/cladding and bending temper: H14 strength with markedly better bend behaviour. | 115 | 150 | 9 | 41 HB | 42 % IACS |
Strain hardened, half hard | The standard stock temper: balanced strength and bendability for panels, cladding, ducting and general sheet metal. | 130 | 150 | 7 | 42 HB | 42 % IACS |
Strain hardened, five-eighths hard | Cold-worked 3103 between half and three-quarter hard, used where higher panel stiffness and dent resistance are needed with limited bending. | 132 | 152 | 6 | 44 HB | 41 % IACS |
H26This page Strain hardened and partially annealed, three-quarter hard | Stabilised three-quarter hard strip for roll-formed profiles needing some residual ductility. | 140 | 175 | 5 | 47 HB | 42 % IACS |
Strain hardened, three-quarter hard | Higher-strength strip for lightly formed parts, shutters and profiled sheet. | 155 | 175 | 4 | 48 HB | 41 % IACS |
Strain hardened, seven-eighths hard | Heavily cold-worked 3103 just below full hard, giving near-maximum strain-hardened strength with minimal remaining ductility. | 155 | 172 | 4 | 50 HB | 41 % IACS |
Strain hardened and partially annealed, full hard | Stabilised fully hard thin strip where flatness and high strength are required. | 165 | 195 | 3 | 53 HB | 41 % IACS |
Strain hardened, full hard | Maximum work-hardened strength; flat parts, spacers and roll-formed strip with no tight bending. | 180 | 195 | 3 | 54 HB | 41 % IACS |
Strain hardened, extra hard | Extra-hard thin strip and foil stock, e.g. fin and lamella applications. | 195 | 210 | 2 | 57 HB | 41 % IACS |
What is 3103-H26?
3103-H26 is 3103 supplied in the H26 condition — stabilised three-quarter hard strip for roll-formed profiles needing some residual ductility. 3103-H26 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 175 MPa (25.4 ksi) — weaker than 70% of aluminum grades. Elongation at break is 5% and the elastic modulus is 69 GPa (10 Msi). 3103-H26 has a density of 2.73 g/cm³ (0.0986 lb/in³), heavier than 61% of aluminum grades. It melts at 645°C (1,193 °F).
Advantages
- Readily welded — 89/100, better than 87% of aluminum grades
- High electrical conductivity — 42 % IACS, better than 81% of aluminum grades
- Good corrosion resistance — 70/100, better than 79% of aluminum grades
- Conducts heat well — 160 W/m·K (92.4 BTU/hr·ft·°F), better than 76% of aluminum grades
Limitations
- Limited service temperature — 110°C (230 °F), worse than 89% of aluminum grades
- Difficult to machine — 40/100, worse than 81% of aluminum grades
3103-H26 properties
Typical room-temperature values for 3103-H26; 18 are specific to this condition. Other listed values are 3103 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
3103-H26 has a density of 2.73 g/cm³ (0.0986 lb/in³), heavier than 61% of aluminum grades. It melts at 645°C (1,193 °F).
Mechanical11
3103-H26 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 175 MPa (25.4 ksi) — weaker than 70% of aluminum grades. Elongation at break is 5% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
3103-H26 is rated for continuous service to 110°C (230 °F). It conducts heat at 160 W/m·K (92.4 BTU/hr·ft·°F), better than 76% of aluminum grades. Thermal expansion is 23.2 µm/m·K (12.9 µin/in·°F).
Electrical3
3103-H26 conducts electricity at 42 % IACS, better than 81% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 79% of aluminum grades.
Sustainability4
Producing a kilogram of 3103-H26 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability7
3103-H26's machinability is fair (40/100, worse than 81% of aluminum grades); weldability excellent (89/100); formability fair (52/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 3103-H26
Is 3103 easy to machine?
Soft and gummy — use polished high-rake carbide, high speeds, low feeds and flood coolant or minimum-quantity lubrication to avoid built-up edge; harder H16/H18 tempers cut cleaner.
Can 3103 be welded?
Excellent with GTAW/GMAW or resistance welding, filler ER1100 or ER4043 (ER5356 where more strength is wanted); the HAZ reverts toward O-temper strength.
Can 3103 be formed, bent or molded?
Very good cold formability, best in O/H22/H24; use generous bend radii in H16–H18 and roll-form rather than press-brake hard tempers.
What surface finishes work on 3103?
Takes protective and hard anodizing well and is a standard pre-painted/coil-coated substrate, but clear anodize looks grey-brown, so bright polish or brush finishes are less attractive than on 5000/6000 series.
3103 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 |
|---|---|---|
| Mnprincipal strengthening addition | 0.9 – 1.5 | 1.2 |
| Fe | ≤ 0.7 | 0.45 |
| Si | ≤ 0.5 | 0.25 |
| Mg | ≤ 0.3 | 0.05 |
| Zn | ≤ 0.2 | — |
| Cu | ≤ 0.1 | 0.03 |
| Cr | ≤ 0.1 | — |
| Ti+Zrcombined limit per EN 573-3 | ≤ 0.1 | — |
| Others (each)total others 0.15 max | ≤ 0.05 | — |
| Alremainder, ~97.5% | balance | — |
3103-H26 — frequently asked
What is 3103-H26 used for?
3103-H26 is typically used for roofing sheet, cladding and HVAC ducts. In short: european 3003; forming sheet.
What is the yield strength of 3103-H26?
3103-H26 has a typical yield strength of 140 MPa (20.3 ksi) and a tensile strength of 175 MPa (25.4 ksi) — weaker than 70% of aluminum grades. Strength varies by condition: see the 16 listed tempers.
Is 3103-H26 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 81% of aluminum grades). Soft and gummy — use polished high-rake carbide, high speeds, low feeds and flood coolant or minimum-quantity lubrication to avoid built-up edge; harder H16/H18 tempers cut cleaner.
Can 3103-H26 be welded?
Yes — weldability is rated excellent (89/100). Excellent with GTAW/GMAW or resistance welding, filler ER1100 or ER4043 (ER5356 where more strength is wanted); the HAZ reverts toward O-temper strength.
What surface finishes work on 3103-H26?
Takes protective and hard anodizing well and is a standard pre-painted/coil-coated substrate, but clear anodize looks grey-brown, so bright polish or brush finishes are less attractive than on 5000/6000 series.
Can 3103-H26 be formed, bent or molded?
Very good cold formability, best in O/H22/H24; use generous bend radii in H16–H18 and roll-form rather than press-brake hard tempers.
What is the maximum service temperature of 3103-H26?
3103-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 3103-H26?
Yes — 3103-H26 is available for 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 of wrought products — CEN (2019)
- EN 485-2 — Aluminium sheet, strip and plate: mechanical properties — CEN (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
- EN AW-3103 (AlMn1) rolled sheet/strip datasheets — European rolling mills (Hydro/Constellium-type) (2023)
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.