1100-O
Fully soft. Order it for deep drawing, spinning, flanging and severe bending. It is the only sensible choice for spun cookware and deep cups.
Commercially pure sheet and plate
1100 Aluminium Sheet & Plate
1100 is commercially pure aluminium (99.00 % minimum) with a small, deliberate copper addition that makes it slightly stronger than the higher-purity 1xxx grades while keeping excellent formability, weldability and corrosion resistance. Metline supplies 1100 sheet and plate in O, H14, H18 and other tempers, cut to size and certified to ASTM B209, to buyers worldwide.
- Purity
- Al ≥ 99.00 %
- Tempers
- O, H12, H14, H16, H18, H112
- Thickness
- 0.2 – 100 mm
- Standards
- ASTM B209 · AMS-QQ-A-250/1 · EN 485
What is 1100 aluminium sheet?
1100 is the workhorse of the commercially pure grades. Its 0.05 – 0.20 % copper gives a little extra strength and a finer response to cold work compared with 1050 or 1060, while silicon and iron together are capped at 0.95 %. It is non-heat-treatable, so strength is set by the degree of cold rolling.
In North America, 1100 is the default "pure aluminium" sheet. Fabricators use it for spun and deep-drawn parts, chemical and food-handling equipment, heat-exchanger fins, reflectors, nameplates and general sheet metal where corrosion resistance and an easy forming route matter more than load capacity. In annealed form it can be drawn into deep cups and spun into cookware and lamp shades without intermediate annealing.
The trade-off is low strength: even fully hard 1100-H18 reaches only about 165 MPa tensile, and the O temper about 90 MPa. If you need more stiffness with similar forming behaviour, 3003 (about 20 % stronger) is the usual next step; for real structural duty, move to 5052 or 6061.
1100 chemical composition (wt %)
Limits are the registered Aluminum Association values used by ASTM B209; EN AW-1100 in EN 573-3 is the same alloy. Every lot ships with a mill certificate reporting its actual analysis.
| Element | Minimum | Maximum | Comment |
|---|---|---|---|
| Silicon + Iron (Si + Fe) | — | 0.95 | Combined limit; the main impurities |
| Copper (Cu) | 0.05 | 0.20 | Deliberate addition for strength and work-hardening response |
| Manganese (Mn) | — | 0.05 | |
| Zinc (Zn) | — | 0.10 | |
| Others, each / total | — | 0.05 / 0.15 | |
| Aluminium (Al) | 99.00 | — | By difference |
Mechanical and physical properties of 1100 by temper
Typical values below come from published Aluminum Association / ASM data and are for comparison. Design to the minimum limits in ASTM B209 for your thickness, which the mill certificate confirms.
| Temper | Tensile strength | Yield strength | Elongation (1.6 mm sheet) | Brinell hardness |
|---|---|---|---|---|
| 1100-O | 90 MPa / 13 ksi | 34 MPa / 5 ksi | 35 % | 23 HB |
| 1100-H12 | 110 MPa / 16 ksi | 103 MPa / 15 ksi | 12 % | 28 HB |
| 1100-H14 | 124 MPa / 18 ksi | 117 MPa / 17 ksi | 9 % | 32 HB |
| 1100-H16 | 145 MPa / 21 ksi | 138 MPa / 20 ksi | 6 % | 38 HB |
| 1100-H18 | 165 MPa / 24 ksi | 152 MPa / 22 ksi | 5 % | 44 HB |
H2x tempers (H22, H24, H26) are strain-hardened and partially annealed: same tensile range as the matching H1x temper with somewhat lower yield and better elongation.
Physical properties (typical)
- Density
- 2.71 g/cm³ (0.098 lb/in³)
- Modulus of elasticity
- 69 GPa (10,000 ksi)
- Electrical conductivity
- about 59 % IACS (O), 57 % IACS (H18)
- Thermal conductivity
- about 222 W/m·K (O)
- Coefficient of thermal expansion
- 23.6 µm/m·°C (20 – 100 °C)
- Melting range
- about 643 – 657 °C
Which 1100 temper to order
1100-H12 / H22
Quarter hard. A little stiffer for moderate forming; H22 gives more elongation for the same strength.
1100-H14 / H24
Half hard. The most common stock temper for general fabrication, flat panels, fins and parts with simple bends.
1100-H16 / H18
Three-quarter and full hard. Use for flat parts that must resist denting, such as nameplates and reflector backs. Bend only with generous radii.
1100-H112
As rolled, for thicker plate where light machining or welding is the main operation and a guaranteed hardness level is not needed.
Not sure?
Tell us the operations (drawing ratio, bend radius, welding) and we will recommend the temper that runs cleanly on your line.
1100 standards and international equivalents
| System | Designation | Sheet and plate standard |
|---|---|---|
| Aluminum Association / ASTM | 1100 | ASTM B209 (ASME SB-209) |
| Aerospace / federal | 1100 | AMS-QQ-A-250/1 |
| UNS | A91100 | — |
| European (EN) | EN AW-1100 / EN AW-Al99.0Cu | EN 485-1/-2, EN 573-3 |
| ISO | Al99.0Cu | ISO 6361, ISO 209 |
| Japan (JIS) | A1100P | JIS H4000 |
| China (GB) | 1100 | GB/T 3880, GB/T 3190 |
1100 is also accepted under ASME SB-209 for pressure equipment such as vessels and tanks in corrosive service, one reason it remains popular in chemical plant fabrication.
1100 sheet and plate sizes and weights
Supply range
- Thickness
- Sheet 0.2 – 6 mm; plate 6 – 100 mm
- Width × length
- 1000 × 2000, 1220 × 2440, 1250 × 2500, 1500 × 3000 mm; 48 × 96 in and 48 × 144 in
- Circles and blanks
- Cut circles and blanks for spinning and deep drawing on request
- Surface
- Mill finish, PVC film, brushed, embossed (stucco) or polished
- Processing
- Shearing, slitting, sawing, laser and waterjet cutting
1100 weighs about 2.71 kg per m² per millimetre of thickness:
| Thickness (mm) | kg per m² | 1220 × 2440 mm (kg) | 1500 × 3000 mm (kg) |
|---|---|---|---|
| 0.5 | 1.35 | 4.0 | 6.1 |
| 0.8 | 2.17 | 6.5 | 9.8 |
| 1 | 2.71 | 8.1 | 12.2 |
| 1.2 | 3.25 | 9.7 | 14.6 |
| 1.5 | 4.06 | 12.1 | 18.3 |
| 2 | 5.42 | 16.1 | 24.4 |
| 3 | 8.13 | 24.2 | 36.6 |
| 4 | 10.8 | 32.3 | 48.8 |
| 5 | 13.6 | 40.3 | 61.0 |
| 6 | 16.3 | 48.4 | 73.2 |
| 8 | 21.7 | 64.5 | 97.6 |
| 10 | 27.1 | 80.7 | 122.0 |
| 12 | 32.5 | 96.8 | 146.3 |
| 16 | 43.4 | 129.1 | 195.1 |
| 20 | 54.2 | 161.3 | 243.9 |
| 25 | 67.8 | 201.7 | 304.9 |
Working with 1100 aluminium
Forming and spinning
O temper tolerates a 0 × t bend radius and very deep draws. Allow for springback in hard tempers and for orange-peel texture if coarse-grained O material is stretched heavily.
Welding
TIG and MIG weld easily with ER1100 filler for colour match and conductivity, or ER4043 for better fluidity and crack resistance. Gas and resistance welding also work.
Machining
Soft and gummy. Use sharp, high-rake tools, high speeds and lubricant; harder tempers give a better finish.
Finishing
Anodises well for protection, though the copper content makes the film slightly less bright than on 1070 or 1085. Also accepts paint and lacquer.
Typical uses of 1100 sheet and plate
- Spun and drawn ware: cookware, lamp shades, reflectors, pressure-cooker bodies
- Chemical and food processing: storage tanks, linings, trays and equipment exposed to food or mild chemicals
- Heat transfer: heat-exchanger fins and plates, where conductivity and formability are needed
- Electronics: PCB drilling entry sheet, shielding and simple conductive parts
- Signs and nameplates: etched, anodised and printed plates
- Building: flashings, decorative trim and insulation jacketing
How to order 1100 sheet and plate
- SpecifyGrade and temper (for example 1100-H14), thickness, width and length, quantity, surface finish and the standard (ASTM B209, AMS-QQ-A-250/1, EN 485).
- QuoteWe confirm availability, tolerances, certification, packing and delivery terms (EXW, FOB, CIF or DAP) for your destination.
- ProcessSheets or circles are cut to size, film-protected if required and checked for dimensions and surface.
- DocumentEach delivery carries a mill test certificate to EN 10204 3.1 with the cast analysis and mechanical results for the lot; third-party inspection can be arranged on request.
- ShipSheets are interleaved or film-protected, packed on pallets or in seaworthy wooden cases, and shipped by sea or air to your port or door.
References and standards
- ASTM B209 – Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
- SAE AMS-QQ-A-250/1 – Aluminum 1100, Plate and Sheet
- EN 573-3 – Aluminium and aluminium alloys: chemical composition and form of wrought products
- The Aluminum Association – International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets)
- ASM Handbook, Volume 2 – Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
1100 aluminium (aluminum) sheet: frequently asked questions
What is the difference between 1100 and 1050 aluminium?
1100 is 99.00 % minimum aluminium with 0.05 – 0.20 % copper; 1050 is 99.50 % minimum with almost no copper. 1100 is slightly stronger, while 1050 has slightly better conductivity and corrosion resistance. Both are very formable.
Is 1100 aluminium food safe?
Commercially pure aluminium such as 1100 is widely used for cookware and food-processing equipment. Food-contact compliance depends on the regulation in your market (for example EN 602 in Europe), so state it on your enquiry.
What is 1100-H14 used for?
Half-hard 1100 is the common stock temper for general sheet metal, fins, panels and parts with simple bends, where a little stiffness helps but forming is still required.
Can 1100 aluminium be anodised?
Yes. It anodises well for protection and decoration, though the film is slightly less bright than on higher-purity grades.
How strong is 1100 compared with 3003?
In the same temper 3003 is roughly 20 % stronger because of its manganese content, with similar formability. 1100 has better conductivity.
Do you supply 1100 circles for spinning?
Yes. We supply cut circles and blanks in O and H-tempers to your diameter and thickness, packed for export.
Need 1100 sheet, plate or circles?
Send the temper, size, quantity and destination. We will reply with availability, certification and a delivered price.
