When fabricating components from pure aluminum, specifying the A1100 alloy is only the first step. The temper you choose dictates whether your material will form smoothly into a deep-drawn shell or snap violently on a press brake. A1100 H14 and A1100 H18 represent two distinct processing conditions for the same base metal.
A1100 H14 and H18 differ primarily in strength, hardness, and formability. A1100 H18 is fully hard, offering the maximum strength and surface hardness available for this alloy, but it possesses extremely poor bendability. A1100 H14 is strain-hardened to a half-hard condition, providing a highly versatile balance between moderate handling strength and excellent formability.
If you purchase H18 intending to bend it 90 degrees, your scrap rate will be unacceptable. If you purchase H14 expecting maximum rigidity for a flat, unformed panel, your product may dent easily. This comprehensive technical guide breaks down the precise mechanical properties, processing limits, and industrial applications of A1100 H14 and H18 aluminum to ensure you procure the correct temper for your factory floor.
What is the Difference Between an A1100 H14 Aluminum Sheet and an A1100 H18?
To understand the difference in performance, we must define how these materials are manufactured. Both start as commercially pure aluminum (minimum 99.0% aluminum content). Because A1100 contains no significant strengthening elements like copper or magnesium, it is a non-heat-treatable alloy. Its strength is dictated entirely by mechanical cold rolling (strain hardening) at the mill.
What is A1100 H14 Aluminum?
The H14 temper indicates a "half-hard" condition. At the mill, the aluminum is cold-rolled to increase its strength over the fully soft (annealed) state, but the rolling is stopped at a precise point to maintain a significant amount of the metal's natural ductility. It is the perfect middle ground: strong enough to remain flat during handling, yet soft enough to undergo extensive deformation without cracking.
What is A1100 H18 Aluminum?
The H18 temper indicates a "full-hard" condition. The aluminum is cold-rolled continuously to its maximum commercial reduction limit without any thermal softening. The internal crystal grains are severely compressed. This results in the highest possible tensile strength and surface hardness for the A1100 alloy, but it entirely destroys the material's ductility.
Mechanical Properties of A1100 H14 vs H18 Aluminum Plate
For engineers calculating tooling pressure and material limits, empirical data is required. The table below outlines the mechanical differences based on standard ASTM B209 specifications.
| Mechanical Property | A1100 H14 (Half-Hard) | A1100 H18 (Full-Hard) |
| Tensile Strength | 110 – 145 MPa | 150 – 185 MPa |
| Yield Strength | ~ 95 MPa | ~ 135 MPa |
| Hardness (Brinell) | ~ 32 HB | ~ 44 HB |
| Elongation | Good (5% - 12%) | Very Low (1% - 4%) |
Data Analysis for Procurement:
While both are considered low-strength materials compared to structural alloys like 6061, the H18 temper is significantly stronger than H14. The yield strength of H18 is roughly 40% higher. However, look at the elongation. The elongation of H18 drops to near zero. It cannot stretch. This physical reality dictates how these materials can be processed.
Are you trying to determine which temper will survive your specific stamping or forming process without cracking? Do not risk ordering a bulk coil of the wrong material. Contact our metallurgical team today for a free formability assessment. We can provide certified test samples of A1100 H14 and H18 aluminum so your operators can test the bending limits on your own machinery.
Can A1100 H18 Aluminum be Bent?
The factory floor is where the temper choice is proven right or wrong. Here is how these two materials react to standard fabrication processes.
| Manufacturing Process | A1100 H14 Aluminum | A1100 H18 Aluminum |
| Bending (Press Brake) | Excellent. Can handle tight radii without cracking. | Poor. Will fracture or snap along the bend line. |
| Deep Drawing | Excellent. Flows smoothly into complex dies. | Not Suitable. Will tear immediately. |
| Welding | Excellent. Standard TIG/MIG applicable. | Good. (Note: Welding heat will soften the HAZ to O temper). |
| Machining | Poor. Too soft, produces gummy, stringy chips. | Poor. Slightly better than H14, but still too soft for high-speed CNC. |
The Golden Rule of Bending A1100:
If your manufacturing process requires sharp 90-degree folds, deep drawing, or metal spinning, you must specify A1100 H14 (or the even softer A1100 O temper). A1100 H18 should never be used for bending operations.
Corrosion Resistance of Pure Aluminum 1100 H14 and H18
A common misconception among junior engineers is that temper affects corrosion resistance. Some believe the harder H18 will resist chemicals better, while others think the softer H14 is more stable. Both are incorrect.
The corrosion resistance of A1100 aluminum is dictated entirely by its high purity (99.0% minimum aluminum) and its ability to naturally form a dense aluminum oxide layer.
- A1100 H14 and A1100 H18 possess the exact same chemical composition.
- Therefore, they offer the exact same, exceptional level of corrosion resistance.
Both tempers perform flawlessly in atmospheric conditions, chemical environments, and food processing applications. Your temper choice should be based strictly on mechanical forming needs, not corrosion concerns.
Typical Applications for A1100 H14 and H18 Aluminum Coil
Because they represent different mechanical behaviors within the same alloy chemistry, these tempers serve entirely different industrial sectors.
Applications for A1100 H14 Aluminum Sheet (Forming Required)
H14 is selected when the material must be manipulated, bent, or drawn into a final shape.
- Sheet Metal Fabrication: Custom enclosures, equipment covers, and weather flashing.
- Heat Exchangers: Fins and tubing that require forming and high thermal conductivity.
- Cookware: Spun or drawn pots and pans.
- Electrical Busbars: Conductors that require bending to fit inside switchgear cabinets.
Applications for A1100 H18 Aluminum Coil (No Forming Required)
H18 is selected when the material must remain as rigid as possible in a thin gauge, and the final product is essentially flat.
- Foil Substrates: Heavy foils used in packaging where rigidity is required.
- Rigid Nameplates and Dials: Flat stamped plates requiring high surface hardness.
- Reflectors: Flat lighting reflectors where the hard surface takes a high polish.
- Flat Architectural Panels: Non-load-bearing flat panels requiring high dent resistance.
Choosing Between A1100 H14 and H18
When writing your material specifications or issuing a purchase order, use this logical breakdown to ensure you procure the correct temper.
Choose A1100 H14 Aluminum if:
Your manufacturing process involves press brake bending, folding, or deep drawing.
Your design includes complex shapes or sharp 90-degree corners.
You require a forgiving material that reduces wear and tear on your stamping dies.
You need a versatile balance between structural handling stiffness and high ductility.
Choose A1100 H18 Aluminum if:
You require the absolute maximum hardness and yield strength available for the pure 1100 series.
Your final product is strictly flat or involves only very shallow, high-speed flat blanking.
You are working with extremely thin gauges and need to prevent the material from sagging or denting easily.
You will absolutely not subject the material to any stretching, drawing, or bending operations.
Frequently Asked Questions (FAQ)
Your Certified Supplier for A1100 H14 and H18 Aluminum Sheets
Securing a consistent supply of accurately tempered aluminum is vital for maintaining your factory's production efficiency. Receiving brittle H18 material when your press brake operators are set up for H14 will immediately halt your production line and drive up scrap costs.
We operate as a global industrial supplier of high-quality aluminum products, manufactured strictly to ASTM B209 and EN 485 international standards. Whether your fabrication line requires the exceptional formability of A1100 H14 aluminum sheet for deep-drawn components, or the maximum thin-gauge rigidity of A1100 H18 aluminum coil for flat stampings, we possess the massive inventory to fulfill your requirements. We support custom slitting, precision cut-to-length services, and protective PVC filming to optimize your supply chain.
Ready to eliminate temper-related scrap and lock in a reliable material supply? We maintain a heavy, high-turnover inventory of A1100 H14 and H18 aluminum, ready for immediate global export. Send us your required sizes, thickness, and temper specifications today. Our dedicated export sales engineers will provide a transparent, competitive factory-direct quotation and full Mill Test Certificates (MTC) within hours. Contact us now to secure your aluminum supply.
