Extruded bars, rods, profiles, and tubes manufactured through hot extrusion. All standard aluminum alloys and tempers are covered. Alloy and temper designations are in compliance with the latest version of ANSI H35.1.
Tolerances for the tubes we supply are shown in the Standard-Tolerances PDF and are in compliance with the latest revision of ANSI H35.2 and Aluminum Standards and Data.
A complete copy of this specification may be purchased at www.ASTM.org
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A copy of ANSI H35.1 and H35.2 is available from the American National Standards Institute.
A copy of the Aluminums Standards and Data is available from the Aluminum Association at www.aluminum.org
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Chemical Composition Limits
The chemical composition table shows the allowable ranges of key alloying elements in aluminum as defined by ASTM B221. Each alloy’s balance of silicon, iron, copper, manganese, magnesium, chromium, zinc, titanium, and other trace elements directly affects its properties.
| Alliage | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Other (each) | Other (total) | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1060 | 0.25 | 0.35 | 0.05 | 0.03 | 0.03 | — | — | 0.05 | 0.03 | 0.05 | 99.60 min |
| 1100 | 0.05–0.20 | 0.05 | — | — | — | — | 0.10 | — | 0.05 | 0.15 | 99.60 min |
| 3003 | 0.6 | 0.7 | 0.05–0.20 | 1.0–1.5 | — | — | 0.10 | — | 0.05 | 0.15 | Remainder |
| 3102 | 0.40 | 0.7 | 0.10 | 0.05–0.40 | — | — | 0.30 | 0.10 | 0.05 | 0.15 | Remainder |
| 6005 | 0.6–0.9 | 0.35 | 0.10 | 0.10 | 0.40–0.6 | 0.10 | 0.10 | 0.10 | 0.05 | 0.15 | Remainder |
| 6005A | 0.50–0.9 | 0.35 | 0.30 | 0.50 | 0.40–0.7 | 0.30 | 0.20 | 0.10 | 0.05 | 0.15 | Remainder |
| 6060 | 0.30–0.6 | 0.10–0.30 | 0.10 | 0.10 | 0.35–0.6 | 0.50 | 0.15 | 0.10 | 0.05 | 0.15 | Remainder |
| 6061 | 0.40–0.8 | 0.70 | 0.15–0.40 | 0.15 | 0.80–1.2 | 0.04–0.35 | 0.25 | 0.15 | 0.05 | 0.15 | Remainder |
| 6063 | 0.20–0.6 | 0.35 | 0.10 | 0.10 | 0.45–0.9 | 0.10 | 0.10 | 0.10 | 0.05 | 0.15 | Remainder |
| 6082 | 0.70–1.3 | 0.50 | 0.10 | 0.40–1.0 | 0.60–1.2 | 0.25 | 0.20 | 0.10 | 0.05 | 0.15 | Remainder |
Why it matters:
Understanding alloy composition is essential when specifying material for a project. Higher magnesium, for example, can improve strength but may reduce machinability. Chromium or copper can enhance corrosion resistance in certain environments, while silicon content often affects extrudability. By comparing these values, engineers can select the alloy that balances corrosion resistance, machinability, and strength for the intended application.
Tensile Property Limits
The tensile property table outlines the mechanical performance characteristics of each alloy and temper. These include:
- Tensile Strength (Ksi): the maximum stress the material can withstand before breaking.
- Yield Strength (0.2% offset, Ksi): the stress at which permanent deformation begins.
- Elongation (%): the ductility of the alloy, or how much it can stretch before fracture.
| Trempe | Specified Section or Wall Thickness, in. | Area, in² | Tensile Strength (Ksi) (min – max) | Yield Strength (0.2% offset, Ksi) (min – max) | Elongation in 2 in. or 4× Diameter, min % |
|---|---|---|---|---|---|
| Aluminum 1060 | |||||
| O | all | all | 8.5 – 14 | 2.5 – … | 25 |
| H112 | all | all | 8.5 – … | 2.5 – … | 25 |
| Aluminum 1100 | |||||
| O | all | all | 11.0 – 15.5 | 3.0 – … | 25 |
| H112 | all | all | 11.0 – … | 3.0 – … | 25 |
| Alloy 3003 | |||||
| O | all | all | 14.0 – 19.0 | 5.0 – … | 25 |
| H112 | all | all | 14.0 – … | 5.0 – … | 25 |
| Alloy Alclad 3003 | |||||
| O | all | all | 13.0 – 18.0 | 4.5 – … | 25 |
| H112 | all | all | 13.0 – … | 4.5 – … | 25 |
| Alloy 3102 | |||||
| H112 | 0.028–0.050 | all | 11.0 – 18.0 | 4.0 – … | 25 |
| Alloy 6005 | |||||
| T1 | up through 0.500 | all | 25.0 – … | 15.0 – … | 16 |
| T5 | up through 0.124 | all | 38.0 – … | 35.0 – … | 8 |
| T5 | 0.125–1.000 | all | 38.0 – … | 35.0 – … | 10 |
| Alloy 6005A | |||||
| T1 | up through 0.249 | all | 25.0 – … | 14.5 – … | 15 |
| T5 | up through 0.250 | all | 38.0 – … | 31.0 – … | 7 |
| T5 | 0.250–0.999 | all | 38.0 – … | 31.0 – … | 9 |
| T61 | up through 0.249 | all | 38.0 – … | 35.0 – … | 8 |
| T61 | 0.250–1.000 | all | 38.0 – … | 35.0 – … | 10 |
| Alloy 6060 | |||||
| T51 | up through 0.125 | all | 22.0 – … | 16.0 – … | 8 |
| T61 | up through 0.124 | — | 30.0 – … | 25.0 – … | 8 |
| T61 | 0.125–1.000 | — | 30.0 – … | 25.0 – … | 10 |
| Alloy 6061 | |||||
| O | all | all | … – 22.0 | … – 16.0 | 16 |
| T1 | up through 0.625 | all | 26.0 – … | 14.0 – … | 16 |
| T4 | all | all | 26.0 – … | 16.0 – … | 16 |
| T4510 | all | all | 26.0 – … | 16.0 – … | 16 |
| T4511 | all | all | 26.0 – … | 16.0 – … | 16 |
| T42 | all | all | 26.0 – … | 12.0 – … | 16 |
| T5 | up through 0.625 | all | 35.0 – … | 30.0 – … | 8 |
| T6 | up through 0.249 | all | 38.0 – … | 35.0 – … | 8 |
| T62 | up through 0.249 | all | 38.0 – … | 35.0 – … | 8 |
| T6510 | up through 0.249 | all | 38.0 – … | 35.0 – … | 8 |
| T6511 | up through 0.249 | all | 38.0 – … | 35.0 – … | 8 |
| T6 | 0.250 and over | all | 38.0 – … | 35.0 – … | 10 |
| T62 | 0.250 and over | all | 38.0 – … | 35.0 – … | 10 |
| T6510 | 0.250 and over | all | 38.0 – … | 35.0 – … | 10 |
| T6511 | 0.250 and over | all | 38.0 – … | 35.0 – … | 10 |
| Alloy 6063 | |||||
| O | all | all | … – 19.0 | … – … | 18 |
| T1 | up through 0.500 | all | 17.0 – … | 9.0 – … | 12 |
| T1 | 0.501–1.000 | all | 16.0 – … | 8.0 – … | 12 |
| T4, T42 | up through 0.500 | all | 19.0 – … | 10.0 – … | 14 |
| T4, T42 | 0.501–1.000 | all | 18.0 – … | 9.0 – … | 14 |
| T5 | up through 0.500 | all | 22.0 – … | 16.0 – … | 8 |
| T5 | 0.501–1.000 | all | 21.0 – … | 15.0 – … | 8 |
| T52 | up through 1.000 | all | 22.0 – 30.0 | 16.0 – 25.0 | 8 |
| T54 | up through 0.124 | all | 33.0 – … | 30.0 – … | 8 |
| T54 | 0.125–0.499 | all | 33.0 – … | 30.0 – … | 10 |
| T6, T62 | up through 0.124 | all | 30.0 – … | 25.0 – … | 8 |
| T6, T62 | 0.125–1.000 | all | 30.0 – … | 25.0 – … | 10 |
| T65 | up through 0.182 | all | 36.0 – … | 33.0 – … | 8 |
| Alloy 6082 | |||||
| T6, T6511 | 0.200–0.750 | all | 45.0 – … | 38.0 – … | 6 |
| T6, T6511 | 0.751–6.000 | all | 45.0 – … | 38.0 – … | 8 |
| T6, T6511 | 6.001–8.00 | all | 41.0 – … | 35.0 – … | 6 |
Why it matters:
These numbers guide engineers and designers in choosing an alloy that can handle the expected loads and stresses. For example, high tensile and yield strengths are critical in structural applications, while higher elongation can be desirable for parts that must endure forming or bending.
How to read the tables:
- Values are shown as min–max ranges.
- Where “…” appears in a cell, it means only a minimum or maximum is specified.
- Example: “8.5 – …” means the minimum tensile strength is 8.5 ksi, with no maximum limit defined.
- Example: “… – 19.0” means the maximum tensile strength is 19.0 ksi, with no defined minimum.
This notation ensures the table accurately represents ASTM B221 specifications.
How to Select the Right Alloy
Choosing the right alloy involves more than just comparing numbers in a table. Key considerations include:
- Strength-to-Weight Requirements
Lighter alloys with high strength are ideal where weight savings are critical, such as in transportation or aerospace. - Corrosion Resistance
Certain alloys offer superior performance in marine or outdoor environments, reducing maintenance and extending service life. - Formability vs. Machinability
If the part will be extruded, bent, or formed, alloys with higher elongation are advantageous. For precision machining, alloys that cut cleanly and hold tolerances are preferred. - Weldability
Some alloys are easier to weld without compromising structural integrity. This is an important factor in fabrication-heavy industries. - Cost Considerations
Alloy selection also comes down to balancing performance with budget. Higher-performance alloys may come at a premium, but deliver long-term value in durability or reduced weight.
Alfiniti can help:
Our team can guide you through these trade-offs, ensuring that you choose the alloy best suited for your application. Whether your priority is strength, corrosion resistance, manufacturability, or cost, we’ll match you with tubing that meets ASTM B221 specifications and your project requirements.
Need to know about aluminum alloy products?
Check out our Aluminum Mill Specifications by Alloys page for a list of all of the alloy products and their key characteristics.
