3105 aluminum alloy is a non-heat-treatable Al-Mn alloy with a small magnesium addition (EN designation AlMn0.5Mg0.5), widely used for residential siding, corrugated roofing, mobile home panels, gutters, flashing, and general sheet metal fabrication. The magnesium addition gives 3105 approximately 10–15% higher strength than 3003 while retaining excellent corrosion resistance, formability, and weldability. Linsy supplies 3105 aluminum sheet, coil, plate, tube, bar, and wire in tempers O, H12, H14, H16, H18, and H112, with custom sizes, surface finishing options, and MTC reports available for every order.
Formulários disponíveis: chapa / bobina / placa / tubo / barra / fio
Temperamentos comuns: O / H12 / H14 / H16 / H18 / H112
Suporte ao processamento: Usinagem CNC / corte a laser / soldagem TIG & MIG / anodização / polimento
Documentos de qualidade: MTC report with every order, SGS test reports available on request
3105 aluminum alloy is a non-heat-treatable wrought Al-Mn (aluminum-manganese) alloy with a small magnesium addition, standardized as UNS A93105 and EN AW-AlMn0.5Mg0.5. Like other 3000-series alloys, 3105 derives its mechanical properties from cold working (strain hardening) rather than precipitation hardening, so its strength is controlled by the degree of cold reduction during rolling and expressed through the H temper designations (H12, H14, H16, H18, etc.).
With 0.30–0.80% manganese and 0.20–0.80% magnesium as its primary alloying elements, 3105 offers approximately 10–15% higher strength than 3003 aluminum while retaining the excellent corrosion resistance, formability, and weldability that characterize the 3000 series. The magnesium addition is the key difference between 3105 and 3003 — it raises yield and tensile strength without significantly reducing ductility, making 3105 the preferred alloy for thin-gauge building applications where a modest strength premium is valuable.
3105 cannot be strengthened by heat treatment. Annealing (O temper) restores full softness, while controlled cold reduction produces the H1x strain-hardened tempers. This makes 3105 ideal for applications requiring roll forming, bending, stamping, or light deep drawing — most notably residential siding, corrugated roofing, mobile home panels, gutters, downspouts, and flashing. It is approved under major international standards including ASTM B209, ASTM B210, ASTM B211, ISO 6361, and EN 573-3.
Linsy supplies 3105 aluminum in the full range of standard and custom product forms. Length, width, and dimensional tolerances can be tailored to your project requirements.
| Formulário | Temperamento | Espessura (mm) | Largura (mm) | Comprimento (mm) |
|---|---|---|---|---|
| 3105 Sheet / Coil | O, H12, H14, H16, H18, H112 | 0.3 – 6.0 | 500 – 2600 | 500 – 16000 |
| Formulário | Temperamento | Espessura (mm) | Largura (mm) | Comprimento (mm) |
|---|---|---|---|---|
| 3105 Plate | O, H12, H14, H112 | 6.0 – 150 | 500 – 2600 | 500 – 16000 |
| Formulário | Temperamento | DE (mm) | Parede (mm) | Comprimento (mm) |
|---|---|---|---|---|
| 3105 Tube | O, H12, H14, H16 | 6 – 200 | 1 – 50 | 1000 – 6000 |
| Formulário | Temperamento | Diâmetro (mm) | Comprimento (mm) |
|---|---|---|---|
| 3105 Round Bar | O, H12, H14, H16, H112 | 3 – 200 | 1000 – 6000 |
| Formulário | Temperamento | Diâmetro (mm) | Peso / Bobina |
|---|---|---|---|
| 3105 Wire | O, H12, H14, H16 | 0.5 – 25 | Mínimo de 50 kg |
3105 aluminum is recognized under international designations and product standards. The table below maps the most common equivalents used in procurement specifications.
| Padrão | Designação | Normas de Produto Aplicáveis |
|---|---|---|
| UNS | A93105 | — |
| PT | EN AW-3105 / EN AW-AlMn0.5Mg0.5 | EN 485, EN 573-3, EN 754, EN 755 |
| AA (Aluminum Association) | 3105 | ASTM B209, B210, B211, B221 |
| ISO | AlMn0.5Mg0.5 | ISO 6361 |
| JIS (Japão) | A3105 | JIS H4000, JIS H4040, JIS H4080 |
| GB (China) | 3105 | GB/T 3190, GB/T 3880 |
The following chemical composition limits apply to 3105 aluminum per ASTM B209 and EN 573-3. All values are weight percent (%).
| Elemento | Mín % | Máx % |
|---|---|---|
| Silício (Si) | — | 0.6 |
| Ferro (Fe) | — | 0.7 |
| Cobre (Cu) | — | 0.3 |
| Manganês (Mn) | 0.30 | 0.8 |
| Magnésio (Mg) | 0.20 | 0.8 |
| Cromo (Cr) | — | 0.2 |
| Zinco (Zn) | — | 0.4 |
| Titânio (Ti) | — | 0.1 |
| Outros Cada | — | 0.05 |
| Outros Total | — | 0.15 |
| Alumínio (Al) | — | Equilíbrio |
The nominal composition (0.5% Mn and 0.5% Mg) is reflected in the European designation AlMn0.5Mg0.5. The magnesium content is what distinguishes 3105 from 3003 (which contains no intentional magnesium) and gives 3105 its slightly higher strength.
The mechanical properties of 3105 aluminum depend strongly on temper. Cold working increases both tensile and yield strength while reducing ductility. The values below are typical for sheet products per ASTM B209.
| Propriedade | Valor típico |
|---|---|
| Resistência à tração (MPa) | 100 – 145 |
| Resistência ao escoamento (MPa) | ≥ 40 |
| Alongamento (%) | ≥ 20 |
| Dureza (Brinell) | 30 |
| Propriedade | Valor típico |
|---|---|
| Resistência à tração (MPa) | 145 – 185 |
| Resistência ao escoamento (MPa) | ≥ 120 |
| Alongamento (%) | ≥ 5 |
| Dureza (Brinell) | 42 |
| Propriedade | Valor típico |
|---|---|
| Resistência à tração (MPa) | ≥ 190 |
| Resistência ao escoamento (MPa) | ≥ 165 |
| Alongamento (%) | ≥ 3 |
| Dureza (Brinell) | 55 |
A têmpera que você escolhe determina o equilíbrio entre resistência, conformabilidade e acabamento superficial. Use o guia abaixo para selecionar a têmpera correta para sua aplicação.
| Temperamento | Descrição | Benefício Principal | Aplicações típicas |
|---|---|---|---|
| O | Recozido — totalmente macio | Máxima conformabilidade e ductilidade | Deep-drawn parts, spinning, complex stampings, roll-formed gutters |
| H12 | Endurecido por deformação, 1/4 duro | Boa conformabilidade com ligeiro ganho de resistência | Moderate forming, general sheet metal, trim |
| H14 | Endurecido por deformação, 1/2 duro | Melhor equilíbrio entre resistência e conformabilidade | Residential siding, roofing sheets, flashing |
| H16 | Endurecido por deformação, 3/4 duro | Maior resistência, conformabilidade limitada | Structural panels, signage, mobile home skirting |
| H18 | Endurecido por deformação, totalmente duro | Maximum strength for 3105 | Painéis planos, peças estruturais não conformadas |
| H112 | Como fabricado (sem controle especial de endurecimento por deformação) | Econômico para chapas mais espessas | Aplicações estruturais em chapas grossas e de grande espessura |
3105 aluminum offers excellent resistance to atmospheric corrosion, including in humid, industrial, and coastal environments. The manganese and magnesium additions do not significantly reduce corrosion performance, and 3105 performs well in contact with mild chemicals, fresh water, and food products. It is commonly used without protective coatings in siding, roofing, and flashing applications, though painted and PVDF-coated 3105 sheet is widely used in building exteriors for long-term weathering performance.
3105 shows outstanding cold formability in the O and H1x tempers. It can be roll formed, bent, stamped, spun, and lightly deep drawn — making it a first-choice material for residential siding profiles, corrugated roofing sheets, gutters, and fabricated flashings. For welding, 3105 is rated as highly weldable by all common methods including TIG (GTAW), MIG (GMAW), and resistance welding. Filler metal 4043 or 1100 is recommended for fusion welding. Note that welding will anneal the heat-affected zone, reducing local strength in cold-worked tempers.
3105 aluminum has good thermal conductivity (approximately 170–190 W/(m·K), varying with temper) and electrical conductivity of approximately 40–43% IACS. Its density is 2.71 g/cm³, and the melting range is 638–657°C. These properties make 3105 suitable for heat exchanger fins and thermal management applications where moderate thermal performance is sufficient, as well as for building applications where thermal expansion behavior matters.
| Setor | Aplicativos | Why 3105 Is Used |
|---|---|---|
| Construção Civil | Residential siding, corrugated roofing sheets, gutters, downspouts, flashing, fascia, soffit | Corrosion resistance, formability, paint acceptance, modest strength premium over 3003 |
| Manufactured Housing | Mobile home panels, skirting, roofing, end-wall cladding | Lightweight, formable, weather-resistant — the dominant siding alloy for mobile homes |
| General Sheet Metal | Enclosures, signage, nameplates, trim, furniture components | Low cost, easy fabrication, good paint adhesion |
| HVAC e Térmico | Aletas de trocadores de calor, tubos de radiadores, componentes de ar condicionado | Condutividade térmica, conformabilidade em espessuras finas |
| Químico e Industrial | Storage tanks for mild chemicals, drums, processing equipment | Resistência a produtos químicos suaves, soldabilidade, não tóxico |
| Alimentação e Cozinha | Cooking utensils, food trays, kitchen equipment | Food-safe, good formability, thermal conductivity |
3105 aluminum supports a wide range of processing and surface treatment options:
When selecting aluminum for your project, 3105 is often compared with nearby alloys. Here is how it stacks up against the most common alternatives:
| Comparação | Diferença Principal | When to Choose 3105 |
|---|---|---|
| 3105 vs 3003 | 3105 adds 0.2–0.8% Mg for ~10–15% higher strength; 3003 is slightly more formable and lower cost | Choose 3105 when the extra strength justifies the small premium; choose 3003 for maximum formability |
| 3105 vs 3004 | 3004 has higher Mn+Mg for more strength; 3105 is more formable and lower cost | Choose 3105 for siding/roofing sheet; choose 3004 for can-body and higher-strength sheet applications |
| 3105 vs 5052 | 5052 has ~40% higher strength and better saltwater corrosion resistance; 3105 is lower cost and more formable | Choose 3105 for cost-sensitive building sheet; choose 5052 for marine or higher-strength applications |
| 3105 vs 1100 | 3105 is meaningfully stronger due to Mn+Mg addition; 1100 has higher purity and electrical conductivity | Choose 3105 for structural building sheet; choose 1100 for electrical or high-purity applications |
| 3105 vs 6061 | 6061 is heat-treatable and ~2x stronger; 3105 is non-HT, more formable, and lower cost | Choose 3105 for forming and building sheet; choose 6061 for structural strength |
For a deeper look at 3105 properties and selection criteria, see our comprehensive guide to 3105 aluminum alloys.
Every order of 3105 aluminum from Linsy includes quality documentation to support your procurement and compliance requirements:
Linsy Aluminum is a Shenzhen-based aluminum factory with more than 20 years of industry experience. We supply 3105 aluminum sheet, coil, plate, tube, bar, and wire across the full range of tempers — from O to H18 and H112. Our broad inventory of 3105 standard specifications supports fast fulfillment for common siding, roofing, and general sheet metal orders, while our low-MOQ custom production capability (10–60 days lead time) handles non-stock sizes, special tempers, painted/coated finishes, and mixed-spec project purchasing.
Our in-house processing capabilities — CNC machining, laser cutting, TIG and MIG welding, anodizing, and polishing — mean you can source both material and downstream processing from a single supplier. Every 3105 order ships with a factory-issued MTC, and SGS test reports are available on request.
Atendemos compradores em todo o mundo, incluindo Europa, África do Sul, Brasil, Singapura, Turquia, Japão, Coreia do Sul e outros mercados asiáticos, oferecendo preços diretos de fábrica e qualidade rastreável, desde a matéria-prima até o produto acabado.
A: 3105 aluminum is most commonly used for residential siding, corrugated roofing sheets, mobile home panels and skirting, gutters, downspouts, flashing, and general sheet metal fabrication. Its combination of corrosion resistance, formability, and a modest strength premium over 3003 makes it the dominant alloy for manufactured-housing cladding and residential building trim. It is also used for heat exchanger fins, signage, and storage tanks for mild chemicals.
A: Both are non-heat-treatable Al-Mn alloys in the 3000 series, but 3105 adds 0.20–0.80% magnesium while 3003 contains no intentional magnesium. The magnesium addition gives 3105 approximately 10–15% higher tensile and yield strength than 3003 in equivalent tempers, at a small cost premium. 3003 remains slightly more formable and is the more common general-purpose grade, while 3105 is preferred for siding and roofing where the extra strength is beneficial.
A: No. 3105 is a non-heat-treatable alloy — it belongs to the 3000 series (Al-Mn with Mg). Its strength is developed through cold working (strain hardening), not through solution heat treatment and aging like 6061 or 7075. The only thermal process applicable to 3105 is annealing (heating to approximately 340–410°C then cooling), which returns the material to its soft O temper condition.
A: Yes. 3105 is rated as highly weldable using TIG (GTAW), MIG (GMAW), oxyacetylene, and resistance welding methods. Filler metal 4043 or 1100 is typically recommended. However, be aware that the heat-affected zone will soften in cold-worked tempers — the welded area reverts to near-O temper strength after welding.
A: Yes, 3105 can be anodized, but the finish will have a gray or yellowish appearance rather than the bright, clear finish of purer grades like 1100 or 6063. This is due to the manganese and magnesium content. 3105 anodizing is suitable for protective or decorative applications where a bright or color-matched finish is not required. For building exteriors, painted (PVDF or polyester) 3105 sheet is far more common than anodizing.
A: The European equivalent of 3105 is EN AW-3105, with the chemical symbol designation EN AW-AlMn0.5Mg0.5 — reflecting the nominal 0.5% manganese and 0.5% magnesium content. It is covered by EN 485 (sheet, strip, and plate), EN 573-3 (chemical composition), EN 754 (cold-drawn tube), and EN 755 (extruded bar and tube). The UNS designation is A93105.
A: Yes, marginally. In equivalent tempers, 3105 typically offers 10–15% higher tensile and yield strength than 3003 thanks to its magnesium content. For example, 3105-H14 sheet reaches roughly 145–185 MPa tensile versus 140–180 MPa for 3003-H14. The difference is modest but meaningful for siding and roofing applications where the strength premium justifies the small price increase.
A: Yes. Linsy issues a factory Mill Test Certificate (MTC) with every 3105 aluminum order, documenting the chemical composition, mechanical properties, and dimensional inspection results for the specific material shipped. SGS test reports are also available on request.
R: A Linsy suporta MOQ baixo para itens padrão em estoque e pedidos de produção personalizada. O MOQ varia de acordo com a forma do produto, tamanho e têmpera. Entre em contato com nossa equipe de vendas com sua especificação para uma cotação de MOQ específica.
R: Itens padrão em estoque são enviados em 3–7 dias. Pedidos de produção personalizada geralmente requerem 10–60 dias, dependendo da liga, dimensões, têmpera, requisitos de processamento e complexidade do pedido.
R: Sim, fornecemos pequenas peças de amostra para avaliação de qualidade. A disponibilidade de amostras depende do estoque e da especificação. Entre em contato conosco com seus requisitos.
A: Aceitamos T/T (transferência bancária) e L/C (carta de crédito). As condições de pagamento padrão são 30% de adiantamento no pedido e 70% antes do embarque. Condições personalizadas podem ser discutidas para parcerias de longo prazo.
A: Enviamos para todo o mundo, incluindo Europa, América do Sul, África, Oriente Médio e Ásia. As opções de frete incluem frete marítimo, frete aéreo e serviços de courier, dependendo do tamanho do pedido e da urgência.
A: Sim. Todos os produtos de alumínio Linsy são respaldados pelo nosso sistema de gestão da qualidade (ISO 9001). Cada pedido é rastreável através do seu MTC, e garantimos as especificações do material e as tolerâncias dimensionais documentadas na confirmação do pedido.
Vantagens da Linsy
A Linsy Aluminum é uma fornecedora líder de produtos de processamento de alumínio, atendendo a diversos setores, incluindo aeroespacial, engenharia geral, automotivo, marítimo, construção naval e outras aplicações industriais especializadas.
Temos o compromisso de manter os mais altos padrões de qualidade e responsabilidade ambiental, conforme demonstrado por nossas certificações: ISO 9001:2008， ISO 14001:2004 e SGS.
