Aluminum 1199 · temper
Aluminum 1199-H18
Properties of the H18 condition, compared with the other 1199 tempers.
Fully cold-rolled foil/sheet: highest strength and best handling stiffness for thin gauges, at the cost of almost all ductility.
What is 1199-H18?
1199-H18 is 1199 in the H18 temper — fully cold-rolled foil/sheet: highest strength and best handling stiffness for thin gauges, at the cost of almost all ductility. 1199-H18 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 84% of aluminum grades. Elongation at break is 4% and the elastic modulus is 62 GPa (8.99 Msi). 1199-H18 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 60% of aluminum grades. It melts at 660°C (1,220 °F).
Advantages
- Conducts heat well — 240 W/m·K (138.7 BTU/hr·ft·°F), better than 100% of aluminum grades
- High electrical conductivity — 63.5 % 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
- Readily welded — 90/100, better than 90% of aluminum grades
Limitations
- Low stiffness — 62 GPa (8.99 Msi), worse than 99% of aluminum grades
- High embodied carbon — 14 kg CO₂/kg, worse than 95% of aluminum grades
- Limited service temperature — 80°C (176 °F), worse than 94% of aluminum grades
- Difficult to machine — 30/100, worse than 91% of aluminum grades
- Low strength — 105 MPa (15.2 ksi), worse than 84% of aluminum grades
1199-H18 properties
Typical room-temperature values for 1199-H18 — 14 properties are specific to this condition; the rest are grade-level values shared by every 1199 temper. Each bar shows where the value sits among the aluminum grades in FabDigit's library — further right is higher.
Physical3
1199-H18 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 60% of aluminum grades. It melts at 660°C (1,220 °F).
Mechanical11
1199-H18 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 84% of aluminum grades. Elongation at break is 4% and the elastic modulus is 62 GPa (8.99 Msi).
Thermal6
1199-H18 is rated for continuous service to 80°C (176 °F). It conducts heat at 240 W/m·K (138.7 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-H18 conducts electricity at 63.5 % 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-H18 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-H18's machinability is poor (30/100, worse than 91% of aluminum grades); weldability excellent (90/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 1199 tempers and conditions
1199 is also supplied in 3 other conditions. The full side-by-side table is on the 1199 overview.
- H18Fully cold-rolled foil/sheet: highest strength and best handling stiffness for thin gauges, at the cost of almost all ductility.105 MPa yield · 30 HB
- H14Intermediate cold-rolled temper when annealed material is too limp to handle but appreciable forming ductility is still needed.70 MPa yield · 23 HB
- ODefault condition: maximum ductility, conductivity and anodizing/etching uniformity — capacitor anode foil, reflectors, deep-drawn and lined components.12 MPa yield · 13 HB
Working with 1199-H18
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.
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.
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) | — |
1199-H18 — frequently asked
What is 1199-H18 used for?
1199-H18 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-H18?
1199-H18 has a typical yield strength of 105 MPa (15.2 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 84% of aluminum grades. Strength varies by condition: see the 4 listed tempers.
Is 1199-H18 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 91% 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-H18 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-H18?
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-H18 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-H18?
1199-H18 is rated for continuous use to about 80°C (176 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 1199-H18?
Yes — 1199-H18 is available for sheet metal with instant online pricing. 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.