AA1100 aluminum is a low-strength alloy, with tensile strength typically ranging from 90 to 110 MPa, depending on its temper.
AA1100 is known as "commercially pure aluminum" because it contains at least 99.0% aluminum. While its structural strength is low, it is still one of the most widely used metals in the world. In this guide, we will break down exactly how strong AA1100 is, compare it to other alloys, and explain where you should and shouldn't use it.
Mechanical Strength of AA1100 Aluminum Tube
The exact strength of an AA1100 aluminum tube depends entirely on its "temper," which means how much the metal was cold-worked at the factory.
Here are the typical mechanical strength values for AA1100:
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Strength Level |
| 1100-O | 70 – 95 | 20 – 35 | Very Low (Fully soft) |
| 1100-H12 | 85 – 105 | 30 – 45 | Low (Quarter-hard) |
| 1100-H14 | 90 – 110 | 35 – 50 | Low (Half-hard) |
| 1100-H18 | 110 – 130 | 75 – 95 | Medium-Low (Full-hard) |
Note: If you use the "O" temper, the metal will permanently bend at just 20-35 MPa of pressure. You can often bend a thin 1100-O pipe with your bare hands.
Read More: What is the Shear Strength of 1100 Aluminum
What Determines the Strength of AA1100 Aluminum Seamless Pipe?
- High Purity (99% Al): Pure metal is naturally soft. Because AA1100 has no major alloying elements, its baseline strength is always low.
- Cold Working (H Temper): Since you cannot use heat to make AA1100 stronger, factories use physical force. Processes like rolling, drawing, or bending (cold working) harden the metal. This is why an H18 temper is significantly stronger than an O temper.
- Non-Heat Treatable: This is a critical point. You cannot put AA1100 into an aging oven to increase its strength like you can with a 6061 alloy. Heating AA1100 will actually "anneal" it, returning it to its softest state.
AA1100 Extruded Tubing vs Other Alloys
To truly understand how strong (or weak) AA1100 is, let's compare it to other common aluminum grades you might find from an AA1100 aluminum tube supplier.
| Alloy Grade | Typical Tensile Strength (MPa) | Strength Category |
| AA1100 | 90 – 110 | Low |
| 3003 | 120 – 160 | Medium-Low |
| 5052 | 190 – 260 | Medium |
| 6061-T6 | 260 – 310 | High |
| 5083 | 270 – 350 | High |
The Bottom Line: AA1100 sits at the very bottom of the aluminum strength ladder. If you need a material to hold a structural load, you must look at the 5000 or 6000 series.
AA1100 Aluminum Round Pipe Application
Suitable for:
- Chemical Equipment: The pure aluminum won't react with many harsh chemicals.
- Food Industry: Non-toxic, easy to clean, and strong enough for processing trays.
- Electrical Conductors: Busbars and wiring do not need high mechanical strength, but they need the excellent conductivity of AA1100.
- Light-Duty Structures: Covers, casings, and non-load-bearing trim.
Not Suitable for:
- Load-Bearing Structures: Building frames, heavy shelving, or vehicle chassis.
- High-Pressure Equipment: If you put high-pressure gas or liquid inside an AA1100 pipe, it will expand and burst.
- High-Stress Environments: Parts that experience heavy vibration or constant impact.
Strength vs Other Properties of 1100 Aluminum Tubing
| Property | Performance in AA1100 |
| Corrosion Resistance | Excellent (Does not rust, resists chemicals) |
| Electrical Conductivity | Excellent (Only second to the 1350 electrical grade) |
| Formability | Excellent (Can be bent, spun, and drawn deeply) |
| Strength | Low |
How to Improve the Strength of AA1100 Aluminum Piping
If you are committed to using AA1100 because you need its corrosion resistance, but you need just a little more strength, here is what you can do:
- Choose a Harder Temper: Never buy the "O" temper for structural parts. Ask your supplier for H14 (half-hard) or H18 (full-hard) to maximize the material's natural strength limit.
- Increase Material Thickness: If the tensile strength is low, compensate by using a thicker wall on your tube or a thicker sheet. More metal equals more load-carrying capacity.
- Upgrade to 3003: If AA1100 is still too weak, switch to 3003 aluminum. It has almost the same formability and corrosion resistance, but the added manganese gives it a noticeable strength boost.
Send your CAD drawings or project requirements to our engineering team at GNEE. We will evaluate the loads and recommend the exact temper you need-completely free of charge.
Why Choose GNEE as Your AA1100 Aluminum Supplier?
Here is why global buyers trust GNEE:
- Strict Compliance with International Standards: All our AA1100 aluminum products strictly comply with ASTM standards (such as ASTM B209, B241, and B221), as well as EN and JIS equivalents.
- Mill Test Certificates (MTC): We don't just promise quality; we prove it. A full MTC is provided with every shipment to ensure 100% chemical and mechanical traceability.
- Complete Product Range: We supply a massive variety of AA1100 products. Whether you need sheets, plates, custom AA1100 extruded tubing, or seamless pipes, we have it. We support all tempers (O, H12, H14, H18, H112) and custom sizes.
- Strong Production & Supply Capacity: With stable raw material sourcing and a large factory inventory, we guarantee fast delivery for urgent orders, ensuring your industrial projects never stop.
- Rich Export Experience: GNEE successfully serves global industries, including chemical processing, construction, and marine sectors. We provide professional export packaging to protect the soft AA1100 metal during ocean freight.
Looking for reliable AA1100 aluminum products?
Whether you need soft coils for deep drawing or customized pipes for heat exchangers, GNEE delivers standard-compliant materials worldwide.
Contact GNEE today for expert technical support and a fast, competitive quotation. Let's build your next project together.
