Aluminum 1199
AA 1199 · UNS A91199 · EN AW-1199, AW 1199 · GB 1A99
1199 is one of the purest registered wrought aluminium grades (Al ≥ 99.99 %); very low Fe, Si and Cu residuals give electrical conductivity, thermal conductivity, corrosion resistance and optical reflectance close to the theoretical values for pure aluminium.
1199 tempers and conditions
1199 is supplied in 4 conditions, soft to hard.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Default condition: maximum ductility, conductivity and anodizing/etching uniformity — capacitor anode foil, reflectors, deep-drawn and lined components. | 12 | 45 | 50 | 13 HB | 64.5 % IACS |
Strain hardened, half hard | Intermediate cold-rolled temper when annealed material is too limp to handle but appreciable forming ductility is still needed. | 70 | 80 | 10 | 23 HB | 64 % IACS |
Strain hardened, full hard | Fully cold-rolled foil/sheet: highest strength and best handling stiffness for thin gauges, at the cost of almost all ductility. | 105 | 115 | 4 | 30 HB | 63.5 % IACS |
Strain hardened, extra hard | Extra-hard rolled foil temper used for high-voltage electrolytic-capacitor cathode/anode foil and other very thin gauges needing tensile strength for winding. | 120 | 130 | 2 | 33 HB | 63.5 % IACS |
What is 1199?
1199 is one of the purest registered wrought aluminium grades (Al ≥ 99.99 %); very low Fe, Si and Cu residuals give electrical conductivity, thermal conductivity, corrosion resistance and optical reflectance close to the theoretical values for pure aluminium. It is used for electrolytic capacitor anode and cathode foil, high-reflectance sheet, sputtering and vapour-deposition targets, and high-purity parts for electronics and chemical service. Strength is very low, the metal is gummy and difficult to cut, and it cannot be strengthened by alloying or heat treatment — only cold work raises strength, and that softens quickly on heating. 1199 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 660°C (1,220 °F). 1199 has a yield strength of 12 MPa (1.74 ksi) and a tensile strength of 45 MPa (6.53 ksi) — weaker than 100% of aluminum grades. Elongation at break is 50% and the elastic modulus is 62 GPa (8.99 Msi).
What is 1199 used for?
- Electrolytic capacitor anode and cathode foil
- Vapour deposition and sputtering targets
- High-reflectance reflector sheet
- High-purity electronic components
- Chemical service parts requiring 4N purity
- Etched high-surface-area capacitor foil
- Laboratory and reference foil
Advantages
- Ductile — tolerates forming and impact — 50%, better than 100% of aluminum grades
- Conducts heat well — 243 W/m·K (140.4 BTU/hr·ft·°F), better than 100% of aluminum grades
- High electrical conductivity — 64.5 % IACS, better than 100% of aluminum grades
- Polishes to a fine finish — 95/100, better than 100% of aluminum grades
- Good corrosion resistance — 82/100, better than 99% of aluminum grades
Limitations
- Low strength — 12 MPa (1.74 ksi), worse than 100% of aluminum grades
- Low stiffness — 62 GPa (8.99 Msi), worse than 99% of aluminum grades
- Difficult to machine — 25/100, worse than 96% of aluminum grades
- High embodied carbon — 14 kg CO₂/kg, worse than 95% of aluminum grades
1199 properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
1199 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 660°C (1,220 °F).
Mechanical11
1199 has a yield strength of 12 MPa (1.74 ksi) and a tensile strength of 45 MPa (6.53 ksi) — weaker than 100% of aluminum grades. Elongation at break is 50% and the elastic modulus is 62 GPa (8.99 Msi).
Thermal6
1199 is rated for continuous service to 150°C (302 °F). It conducts heat at 243 W/m·K (140.4 BTU/hr·ft·°F), better than 100% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1199 conducts electricity at 64.5 % IACS, better than 100% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 99% of aluminum grades.
Sustainability4
Producing a kilogram of 1199 takes about 230 MJ of energy and emits 14 kg of CO₂ — more than 96% of aluminum grades. Typical recycled content is 0%.
Manufacturability8
1199's machinability is poor (25/100, worse than 96% of aluminum grades); weldability excellent (90/100); formability excellent (98/100).
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. 1199 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1199
Is 1199 easy to machine?
Very gummy — use polished high-rake carbide or single-crystal diamond tools, high speed, low feed and flood lubricant to avoid built-up edge and tearing; not suited to threading or fine parting.
Can 1199 be welded?
Excellent gas-tungsten/gas-metal arc weldability with 1188/1100 filler or autogenously; keep the joint contamination-free since Fe/Si pickup destroys purity, conductivity and etch behaviour.
Can 1199 be formed, bent or molded?
Outstanding cold formability in O temper — deep drawing, spinning, rolling to a few micrometres of foil; anneal between heavy reductions and expect very low springback plus easy scuffing.
Manufacturability
The process limits FabDigit applies to 1199. Every 1199 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
Sheet metal
| Formability | Excellent98 / 100 |
|---|---|
| Weldability | Excellent90 / 100 |
| Bendable | Yes |
1199 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 | ≤ 0.01 | 0 |
| Fe | ≤ 0.01 | 0 |
| Cu | ≤ 0.01 | 0 |
| Mg | ≤ 0.01 | 0 |
| Mn | ≤ 0 | 0 |
| Zn | ≤ 0.01 | 0 |
| Ti | ≤ 0 | 0 |
| V | ≤ 0.01 | 0 |
| Ga | ≤ 0.01 | 0 |
| Others (each)each other element 0.002 max | ≤ 0 | |
| Al99.99 % min (4N super-purity) | ≥ 99.99 (balance) |
What surface finishes work on 1199?
Best-in-class bright and clear anodizing and electropolishing (water-clear, high-reflectivity films); mechanically polishes to mirror finish but scratches easily, and electrolytic etching gives the huge surface area used in capacitor foil.
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).
Equivalent designations
Standards and trade names that resolve to Aluminum 1199 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A91199
- Aluminum Association
- AA1199
- EN / DIN / Werkstoff-Nr.
- AW-1199AW 1199Al99.99
- GB (China)
- 1A99
How much does 1199 cost?
1199 is a budget-cost aluminum ($), cheaper than about 71% 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.
1199 — frequently asked
What is 1199 used for?
1199 is typically used for electrolytic capacitor anode and cathode foil, vapour deposition and sputtering targets, high-reflectance reflector sheet, high-purity electronic components, chemical service parts requiring 4N purity and etched high-surface-area capacitor foil. In short: super-pure 4N; lab-grade.
What is the yield strength of 1199?
1199 has a typical yield strength of 12 MPa (1.74 ksi) and a tensile strength of 45 MPa (6.53 ksi) — weaker than 100% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is 1199 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 96% of aluminum grades). Very gummy — use polished high-rake carbide or single-crystal diamond tools, high speed, low feed and flood lubricant to avoid built-up edge and tearing; not suited to threading or fine parting.
Can 1199 be welded?
Yes — weldability is rated excellent (90/100). Excellent gas-tungsten/gas-metal arc weldability with 1188/1100 filler or autogenously; keep the joint contamination-free since Fe/Si pickup destroys purity, conductivity and etch behaviour.
What surface finishes work on 1199?
Best-in-class bright and clear anodizing and electropolishing (water-clear, high-reflectivity films); mechanically polishes to mirror finish but scratches easily, and electrolytic etching gives the huge surface area used in capacitor foil.
Can 1199 be formed, bent or molded?
Outstanding cold formability in O temper — deep drawing, spinning, rolling to a few micrometres of foil; anneal between heavy reductions and expect very low springback plus easy scuffing.
What is the maximum service temperature of 1199?
1199 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1199 cost?
1199 is a budget-cost aluminum ($), cheaper than about 71% 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 1199?
Yes — 1199 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 573-3 Aluminium and aluminium alloys — Chemical composition — CEN (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — 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.