Aluminum 1200-H28
Supply condition
AA 1200 · UNS A91200 · EN AW-1200, AW 1200 · JIS A1200 · BS 1C
H28 = strain hardened and partially annealed, full hard
Full-hard stabilized thin strip/foil stock where flatness and consistent hardness matter more than ductility.
Values for the H28 condition
Other 1200 tempers and conditions
1200 is listed in 13 conditions; see the grade overview at 1200.
Compare all 13 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum ductility: deep drawing, spinning, hand-formed sheet, foil and chemical-tank linings. | 32 | 90 | 40 | 23 HB | 59 % IACS |
Slightly strain hardened | Near-O ductility with slightly higher strength; common designation on EN 485 sheet and coil for forming work. | 35 | 95 | 32 | 24 HB | 59 % IACS |
Strain hardened from hot working only | 1200 hot-fabricated (extrusion/plate) with incidental strain hardening from forming, meeting guaranteed minimum mechanical limits; slightly stronger than O temper with near-full ductility. | 40 | 90 | 28 | 24 HB | 58 % IACS |
As fabricated | As-fabricated 1200 commercially pure aluminium (hot-worked/extruded, no controlled strain hardening or thermal treatment); mechanical properties not guaranteed but typically near-annealed to slightly work-hardened. | 45 | 95 | 30 | 25 HB | 59 % IACS |
Strain hardened and partially annealed, quarter hard | Stabilized quarter-hard coil with better ductility than H12 at the same strength class — good for roll-formed profiles. | 75 | 105 | 16 | 28 HB | 58 % IACS |
Strain hardened, quarter hard | Light temper for parts that still need bending or roll forming but more stiffness than O. | 85 | 105 | 14 | 28 HB | 58 % IACS |
Strain hardened and partially annealed, half hard | Half-hard temper with more residual bendability than H14; widely used for European sheet/coil and roofing strip. | 95 | 125 | 11 | 33 HB | 57 % IACS |
Strain hardened, half hard | The standard stocked sheet/coil temper: good balance of moderate strength, workable bend radii and full corrosion/conductivity performance. | 105 | 120 | 9 | 32 HB | 57 % IACS |
Strain hardened and partially annealed, three-quarter hard | Three-quarter hard stabilized strip for stiff panels that still need mild forming. | 120 | 145 | 7 | 39 HB | 57 % IACS |
Strain hardened, three-quarter hard | Choose for flat panels, name plates and shallow-formed parts needing more stiffness with limited bending. | 125 | 140 | 6 | 38 HB | 57 % IACS |
H28This page Strain hardened and partially annealed, full hard | Full-hard stabilized thin strip/foil stock where flatness and consistent hardness matter more than ductility. | 145 | 160 | 5 | 44 HB | 57 % IACS |
Strain hardened, full hard | Highest practical cold-worked strength; used for flat strip, fin stock and foil where no forming is required. | 150 | 160 | 4 | 44 HB | 57 % IACS |
Strain hardened, extra hard | Extra-hard thin strip/foil and wire where maximum as-rolled strength and springiness are wanted. | 165 | 175 | 3 | 47 HB | 56 % IACS |
What is 1200-H28?
1200-H28 is 1200 supplied in the H28 condition — full-hard stabilized thin strip/foil stock where flatness and consistent hardness matter more than ductility. 1200-H28 has a yield strength of 145 MPa (21 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 68% of aluminum grades. Elongation at break is 5% and the elastic modulus is 69 GPa (10 Msi). 1200-H28 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 645°C (1,193 °F).
Advantages
- Conducts heat well — 226 W/m·K (130.6 BTU/hr·ft·°F), better than 95% of aluminum grades
- High electrical conductivity — 57 % IACS, better than 94% of aluminum grades
- Readily welded — 89/100, better than 87% of aluminum grades
- Polishes to a fine finish — 70/100, better than 87% of aluminum grades
- Good corrosion resistance — 71/100, better than 80% of aluminum grades
Limitations
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
- Difficult to machine — 41/100, worse than 78% of aluminum grades
1200-H28 properties
Typical room-temperature values for 1200-H28; 19 are specific to this condition. Other listed values are 1200 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
1200-H28 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 645°C (1,193 °F).
Mechanical10
1200-H28 has a yield strength of 145 MPa (21 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 68% of aluminum grades. Elongation at break is 5% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1200-H28 is rated for continuous service to 120°C (248 °F). It conducts heat at 226 W/m·K (130.6 BTU/hr·ft·°F), better than 95% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
1200-H28 conducts electricity at 57 % IACS, better than 94% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (71/100), better than 80% of aluminum grades.
Sustainability4
Producing a kilogram of 1200-H28 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 20%.
Manufacturability8
1200-H28's machinability is fair (41/100, worse than 78% of aluminum grades); weldability excellent (89/100); formability fair (48/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1200-H28
Is 1200 easy to machine?
Very soft and gummy — use polished high-rake carbide, high speed, low feed pressure and flood lubricant to avoid built-up edge and tearing; not a choice for fine threads or tight tolerances.
Can 1200 be welded?
Excellent by TIG/MIG (1100 or 4043 filler) and resistance welding; welds return to near-O strength, so design joints for annealed properties.
Can 1200 be formed, bent or molded?
Outstanding cold formability in O/H111 — deep drawing, spinning, roll forming and foil rolling; anneal at ~345 °C between severe operations.
What surface finishes work on 1200?
Anodizes bright and clear (decorative and reflector work), takes conversion coatings and paint well after alkaline clean; mechanical polish is easy but soft and scratch-prone.
1200 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 |
|---|---|---|
| SiSi + Fe combined max 1.00 % | ≤ 1 | 0.25 |
| FeSi + Fe combined max 1.00 % | ≤ 1 | 0.5 |
| Cu | ≤ 0.05 | 0.02 |
| Mn | ≤ 0.05 | 0.02 |
| Zn | ≤ 0.1 | 0.03 |
| Ti | ≤ 0.05 | 0.02 |
| Others (each)0.15 % total | ≤ 0.05 | — |
| Al | ≥ 99 (balance) | — |
1200-H28 — frequently asked
What is 1200-H28 used for?
1200-H28 is typically used for tank and vessel linings, architectural sheet and cladding, chemical process equipment liners, lighting reflectors, nameplates and signage and roofing, flashing and ducting sheet. In short: general-purpose pure; easy to form.
What is the yield strength of 1200-H28?
1200-H28 has a typical yield strength of 145 MPa (21 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 68% of aluminum grades. Strength varies by condition: see the 13 listed tempers.
Is 1200-H28 easy to machine?
Not especially — machinability is rated fair (41/100, worse than 78% of aluminum grades). Very soft and gummy — use polished high-rake carbide, high speed, low feed pressure and flood lubricant to avoid built-up edge and tearing; not a choice for fine threads or tight tolerances.
Can 1200-H28 be welded?
Yes — weldability is rated excellent (89/100). Excellent by TIG/MIG (1100 or 4043 filler) and resistance welding; welds return to near-O strength, so design joints for annealed properties.
What surface finishes work on 1200-H28?
Anodizes bright and clear (decorative and reflector work), takes conversion coatings and paint well after alkaline clean; mechanical polish is easy but soft and scratch-prone.
Can 1200-H28 be formed, bent or molded?
Outstanding cold formability in O/H111 — deep drawing, spinning, roll forming and foil rolling; anneal at ~345 °C between severe operations.
What is the maximum service temperature of 1200-H28?
1200-H28 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 1200-H28?
Yes — 1200-H28 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
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate: mechanical properties — CEN (2016)
- ASTM B209 Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — 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.