3105 H26 Color Coated Aluminum Coils
3105 H26 color coated aluminum coils are a practical, high-value choice for architectural cladding, roofing, rainwater systems, appliance panels, and general fabrication where formability, corrosion resistance, and a clean painted finish matter. Built on AA3105 (an Al-Mn alloy) and supplied in the H26 temper, this product balances strength and bend performance, while the factory-applied coating system delivers color consistency, weather durability, and fast downstream processing.
From a customer's perspective, the advantage is simple: you receive a lightweight metal coil that cuts, roll-forms, and profiles efficiently, and already carries a controlled, uniform paint film designed to withstand outdoor exposure and daily handling.
Base alloy: AA3105 (Al-Mn series)
Temper: H26 (strain-hardened and partially annealed)
Product form: Color coated coil (typically one side or two sides coated)
Typical coating types: PE (polyester), SMP (silicone-modified polyester), PVDF (fluorocarbon), PU and other customized systems
3105 is widely used for painted products because it offers stable mechanical properties, good corrosion resistance, and reliable surface quality for coil coating. H26 is commonly selected when end users need improved stiffness over softer tempers, while maintaining good forming performance for common profiles.
Features Customers Care About
| Feature | What It Means in Practice | Customer Benefit |
|---|---|---|
| Excellent paint adhesion | Coating bonds well to pretreated aluminum | Reduced risk of peeling during forming and service |
| Good corrosion resistance | Al-Mn alloy resists atmospheric corrosion well | Longer service life for outdoor components |
| Balanced strength and formability (H26) | Higher hardness than softer grades, still bend-friendly | Cleaner roll forming, reduced oil-canning risk |
| Lightweight | Aluminum density around one-third of steel | Easier handling, lower structural load |
| High surface consistency | Coil-coating process controls gloss, color, and film | Better visual uniformity across projects |
| Process efficiency | Coil can be slit, leveled, stamped, profiled | Faster production, fewer finishing steps |
Typical Applications
| Application Area | Typical Parts | Why 3105 H26 Coated Coil Works |
|---|---|---|
| Construction envelope | Roof panels, wall cladding, fascia, soffit | Weatherability + formability + aesthetic finish |
| Rainwater systems | Gutters, downspouts, trims | Corrosion resistance and easy roll forming |
| Shutters and louvers | Rolling shutters, ventilation panels | Stiffness and coating durability |
| Appliances and light industrial | Outer panels, covers, casings | Clean surface, scratch resistance options |
| Signage and decorative panels | Flat signs, profiled decorative sheets | Color stability and surface uniformity |
Coating System Options (What You Can Specify)
Color coated coils are a "system product": performance depends on pretreatment + primer + topcoat + curing. Common choices are shown below.
| Coating Type | Typical Use | Relative Weatherability | Notes |
|---|---|---|---|
| PE (Polyester) | General roofing, interior/exterior trims | Medium | Cost-effective, wide color range |
| SMP | Higher sun/UV exposure building products | Medium–High | Better chalk resistance than standard PE |
| PVDF | Premium façade and high-UV environments | High | Excellent color retention; often specified for landmark buildings |
| PU / Specialty | Scratch resistance, chemical resistance, special feel | Varies | Used for appliances, transport, functional surfaces |
Common finish options: solid colors, metallics, matte, high gloss, textured, wrinkle, embossed look (depending on coating line capability and paint system).
Chemical Composition (AA3105 Typical Limits)
The chemical composition governs corrosion behavior, strength response, and coating compatibility. The following table reflects typical AA3105 limits used in industry specifications (final values depend on the supplying mill standard).
| Element | Composition (wt.%) |
|---|---|
| Silicon (Si) | ≤ 0.60 |
| Iron (Fe) | ≤ 0.70 |
| Copper (Cu) | ≤ 0.30 |
| Manganese (Mn) | 0.30 – 0.80 |
| Magnesium (Mg) | 0.20 – 0.80 |
| Chromium (Cr) | ≤ 0.20 |
| Zinc (Zn) | ≤ 0.40 |
| Titanium (Ti) | ≤ 0.10 |
| Other (each) | ≤ 0.05 |
| Other (total) | ≤ 0.15 |
| Aluminum (Al) | Remainder |
Temper and Performance Notes (H26)
"H26" indicates the sheet has been strain-hardened and partially annealed to reach a controlled level of strength. In coated coil, this temper is popular for roll-formed profiles that must stay straight and resist deformation, while still allowing bends without excessive cracking when correct bend radii and tooling are used.
Forming guidance (practical): For tight bends, align bending direction thoughtfully, ensure clean tooling, and confirm coating flexibility requirements (especially for thick films or textured finishes). Final bend performance depends on thickness, coating type, radius, and forming method.
Typical Mechanical Properties (Reference)
Mechanical values vary with thickness, processing route, and standards. The table below is a practical reference range often seen for 3105 H26 sheet/coil.
| Property | Typical Range |
|---|---|
| Tensile Strength (MPa) | 160 – 200 |
| Yield Strength (MPa) | 130 – 170 |
| Elongation (%) | 2 – 6 |
If your application is sensitive to cracking or requires deep drawing, confirm the target elongation and conduct forming trials with the selected coating system.
Technical Specifications (Supply Range)
These are common supply capabilities for color coated 3105 H26 coils; exact ranges depend on line capacity, coating type, and customer requirements.
| Item | Typical Specification |
|---|---|
| Alloy / Temper | 3105 H26 |
| Thickness (mm) | 0.20 – 1.50 |
| Width (mm) | 600 – 1600 |
| Coil ID (mm) | 405 / 508 (customizable) |
| Coil OD (mm) | Up to ~1500 (subject to logistics) |
| Substrate finish | Mill finish / pretreated surface for coating |
| Coating structure | 1-side or 2-side coating |
| Topcoat thickness (µm) | 15 – 25 (typical) |
| Primer thickness (µm) | 5 – 10 (typical) |
| Back coat (µm) | 5 – 12 (typical) |
| Gloss | Matte to high gloss (custom) |
| Color | RAL / Pantone / custom match |
| Protective film | Optional (clear/blue, laser film options vary) |
Quality and Testing (What Gets Controlled)
A well-made 3105 H26 color coated coil is defined less by appearance alone and more by consistent control of coating and substrate. Typical controls include:
| Category | Common Checks | Purpose |
|---|---|---|
| Substrate | thickness, width, flatness, surface cleanliness | Stable forming and coating uniformity |
| Pretreatment | conversion coating weight, water break | Adhesion and corrosion resistance |
| Coating | film thickness, gloss, color ΔE, cure (MEK rub) | Visual consistency and durability |
| Mechanical | T-bend, impact, adhesion (cross-hatch) | Ensures coating survives forming and handling |
| Corrosion | salt spray, humidity, outdoor exposure data | Predicts service life in target climate |
Choosing the Right 3105 H26 Coated Coil
| Selection Factor | Recommendation |
|---|---|
| Outdoor high-UV projects | Prefer PVDF or high-performance SMP |
| Cost-sensitive standard roofing | PE is commonly sufficient when exposure is moderate |
| Tight bending profiles | Confirm bend requirements, coating flexibility, and film thickness |
| Coastal / industrial atmosphere | Upgrade pretreatment and coating system; consider heavier film builds |
| High scratch risk during fabrication | Consider protective film or tougher topcoats (PU/specialty) |
3105 H26 color coated aluminum coils combine the corrosion resistance of AA3105 aluminum with a factory-applied, durable paint finish for roofing, wall cladding, gutters, trims, shutters, and appliance panels. The H26 temper provides a reliable balance of strength and formability for roll forming and light fabrication, while coating options such as PE, SMP, and PVDF allow customers to match budget and weatherability requirements. With consistent film thickness, strong paint adhesion, and customizable colors and gloss levels, 3105 H26 prepainted aluminum coil is a lightweight, efficient, and visually consistent solution for modern building and manufacturing needs.
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