3105 is an aluminum-manganese-magnesium (Al-Mn-Mg) corrosion-resistant alloy. By adding magnesium to the 3003 alloy composition, it achieves solid-solution strengthening. Its performance sits between the general-purpose 3003 alloy and the higher-strength 5052 (Al-Mg) alloy, offering a cost-effective solution for outdoor applications subject to moderate loads. As an aluminum coil supplier, BCM Aluminum produces 3105 aluminum coils in strict accordance with ASTM B209 standards. We maintain a steady inventory of H14 and H24 tempers, serving sectors such as construction, industry, and transportation, with extensive experience supporting projects across North America.
Gutters and downspouts represent the primary application for 3105 aluminum coils. These components are constantly exposed to rainwater, freeze-thaw cycles, and the corrosive effects of decaying organic matter (such as fallen leaves), necessitating high precision in formability and excellent corrosion resistance. BCM typically supplies 3105-H24 aluminum coil, which undergoes cold rolling followed by low-temperature annealing to relieve internal stress. This results in an elongation of ≥10% and approximately 20% less springback compared to the H14 temper. During roll forming, the 3105 aluminum material ensures tight seams and stable angles, with no micro-cracking even when bent at 90-degree angles. 3105alloy itself can withstand over 800 hours of neutral salt spray testing, providing robust resistance against rainwater and mild acidic exposure.
In a residential development project in Ontario, Canada, 0.6mm-thick 3105-H24 aluminum coils—supplied by BCM—were roll-formed into K-style gutters. Despite local winter temperature fluctuations of up to 60°C and frequent freeze-thaw cycles, the gutters showed no joint leakage or significant surface corrosion after three years of service. Industry experience suggests that the H24 temper is the preferred choice for formed gutter components, as it effectively reduces the risk of joint cracking over long-term use.
Low-to-medium-load industrial and commercial roofing represents a primary application for 3105 aluminum coils. In the H14 temper, the material offers a tensile strength of 160–205 MPa and a yield strength of ≥145 MPa. It provides approximately 10% better resistance to wind uplift and snow loads compared to 3003-series aluminum, while maintaining excellent roll-forming characteristics. BCM offers various surface textures—including smooth, stucco-embossed, and lenticular (tread-plate) patterns—along with a range of coating options (PE, HDP, and PVDF) to meet specific weather-resistance requirements for different projects.
For a warehouse facility in Alberta, Canada, 0.8mm-thick 3105-H14 stucco-embossed, HDP-coated aluminum coils were used to create standing-seam roof panels. The material’s superior rigidity over long spans allowed for a reduction in the density of the supporting purlins, resulting in an approximately 8% decrease in overall roofing costs compared to using 3003-series aluminum of the same thickness.
Insulation jacketing for HVAC and process piping in industrial facilities requires materials with high resistance to atmospheric corrosion and excellent formability. The 3105 alloy offers better resistance to industrial exhaust gases and airborne dust than pure aluminum. Furthermore, a stucco-embossed finish creates a layer of trapped air between the aluminum jacket and the insulation material, improving thermal insulation efficiency by 10%–15% compared to smooth-surfaced panels. BCM also provides aluminum coils with moisture barrier—pre-laminated with kraft paper or PE film on the inner side—to streamline on-site installation processes.
For an HVAC ductwork retrofit project at a petrochemical facility in Eastern Canada, 0.5mm-thick 3105-H14 aluminum coils—featuring an orange-peel embossed pattern and a laminated kraft paper backing—were utilized. This material allowed for convenient on-site installation and ensured long-term durability without corrosion on the reverse side.
3105 aluminum coils offer excellent coating adhesion and a T-bend rating of ≤2T, ensuring the coating does not crack or peel during bending. They are widely used for architectural shading louvers, rolling shutter doors, cornice profiles, and exterior wall cladding. The material features a flat surface with a batch-to-batch color consistency of ΔE ≤ 1.0, ensuring a uniform visual appearance across large-scale installations. Custom color matching—including RAL and NCS standards—is available to meet specific architectural facade design requirements.
Combining lightweight properties with resistance to road-salt corrosion, 3105 aluminum coils are frequently used for the side panels of box trailers, wall panels for modular/mobile structures, and the exterior envelopes of recreational vehicles (RVs). Compared to steel of the same thickness, this material reduces weight by over 60%, thereby increasing vehicle payload capacity; when finished with a high-quality coating, it remains free from corrosion over long-term use.
BCM maintains inventory of 3105 aluminum coils with thicknesses ranging from 0.3mm to 2.0mm. Widths can be customized through precision slitting, and the material is available in plain, embossed, or pre-painted finishes. Each batch is supplied with comprehensive ASTM material certification and performance test reports, with fast local delivery available throughout North America. For project-specific selection advice or price quotes, please provide your operational requirements and dimensional specifications; our technical team will recommend the optimal material temper and surface finish for your needs.
