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.
可选格式： 板材 / 卷材 / 板 / 管材 / 棒材 / 线材
常见脾气： O / H12 / H14 / H16 / H18 / H112
处理支持： 数控加工 / 激光切割 / TIG 和 MIG 焊接 / 阳极氧化 / 抛光
质量文件： 每笔订单均附带MTC报告，SGS测试报告可应要求提供
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.
| 形式 | 脾气 | 厚度（毫米） | 宽度（毫米） | 长度（毫米） |
|---|---|---|---|---|
| 3105 Sheet / Coil | O、H12、H14、H16、H18、H112 | 0.3 – 6.0 | 500 – 2600 | 500 – 16000 |
| 形式 | 脾气 | 厚度（毫米） | 宽度（毫米） | 长度（毫米） |
|---|---|---|---|---|
| 3105 Plate | O、H12、H14、H112 | 6.0 – 150 | 500 – 2600 | 500 – 16000 |
| 形式 | 脾气 | 外径 (mm) | 壁厚（毫米） | 长度（毫米） |
|---|---|---|---|---|
| 3105 Tube | O、H12、H14、H16 | 6 – 200 | 1 – 50 | 1000 – 6000 |
| 形式 | 脾气 | 直径（毫米） | 长度（毫米） |
|---|---|---|---|
| 3105 Round Bar | O、H12、H14、H16、H112 | 3 – 200 | 1000 – 6000 |
| 形式 | 脾气 | 直径（毫米） | 重量 / 线圈 |
|---|---|---|---|
| 3105 Wire | O、H12、H14、H16 | 0.5 – 25 | 至少 50 公斤 |
3105 aluminum is recognized under international designations and product standards. The table below maps the most common equivalents used in procurement specifications.
| 标准 | 名称 | 适用产品标准 |
|---|---|---|
| UNS | A93105 | — |
| EN | EN AW-3105 / EN AW-AlMn0.5Mg0.5 | EN 485、EN 573-3、EN 754、EN 755 |
| AA（铝业协会） | 3105 | ASTM B209、B210、B211、B221 |
| 国际标准化组织 | AlMn0.5Mg0.5 | ISO 6361 |
| JIS（日本） | A3105 | JIS H4000、JIS H4040、JIS H4080 |
| GB（中国） | 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 (%).
| 要素 | Min % | Max % |
|---|---|---|
| 硅 (Si) | — | 0.6 |
| 铁（Fe） | — | 0.7 |
| 铜 (Cu) | — | 0.3 |
| 锰 (Mn) | 0.30 | 0.8 |
| 镁（Mg） | 0.20 | 0.8 |
| 铬 (Cr) | — | 0.2 |
| 锌 (Zn) | — | 0.4 |
| 钛 (Ti) | — | 0.1 |
| 其他 各 | — | 0.05 |
| 其他 合计 | — | 0.15 |
| 铝 (Al) | — | 平衡 |
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.
| 财产 | 典型值 |
|---|---|
| 拉伸强度（兆帕） | 100 – 145 |
| 屈服强度（兆帕） | ≥ 40 |
| 伸长率 (%) | ≥ 20 |
| 硬度（布氏硬度） | 30 |
| 财产 | 典型值 |
|---|---|
| 拉伸强度（兆帕） | 145 – 185 |
| 屈服强度（兆帕） | ≥ 120 |
| 伸长率 (%) | ≥ 5 |
| 硬度（布氏硬度） | 42 |
| 财产 | 典型值 |
|---|---|
| 拉伸强度（兆帕） | ≥ 190 |
| 屈服强度（兆帕） | ≥ 165 |
| 伸长率 (%) | ≥ 3 |
| 硬度（布氏硬度） | 55 |
您选择的回火等级决定了强度、可成形性和表面光洁度之间的平衡。请参考以下指南，为您的应用选择合适的回火等级。.
| 脾气 | 说明 | 主要优势 | 典型应用 |
|---|---|---|---|
| O | 退火——完全软化 | 最佳成形性和延展性 | Deep-drawn parts, spinning, complex stampings, roll-formed gutters |
| H12 | 应变硬化，1/4硬度 | 可成形性好，且强度略有提高 | Moderate forming, general sheet metal, trim |
| H14 | 应变硬化，半硬 | 强度与可成形性的最佳平衡 | Residential siding, roofing sheets, flashing |
| H16 | 应变强化，3/4硬度 | 强度更高，可成形性有限 | Structural panels, signage, mobile home skirting |
| H18 | 应变硬化，完全硬化 | Maximum strength for 3105 | 平板、未成型的结构件 |
| H112 | 出厂状态（未进行特殊的应变硬化控制） | 适用于较厚板材，经济实惠 | 钢板及厚板结构应用 |
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.
| 行业 | 应用 | Why 3105 Is Used |
|---|---|---|
| 建筑与施工 | 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 |
| 暖通空调与热能 | 换热器翅片、散热器管、空调部件 | 导热性，可成形为薄片 |
| 化工与工业 | Storage tanks for mild chemicals, drums, processing equipment | 耐弱腐蚀性、可焊接性、无毒 |
| 美食与厨房 | 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:
| 比较 | 主要区别 | 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.
我们为全球各地的买家提供服务，包括欧洲、南非、巴西、新加坡、土耳其、日本、韩国及其他亚洲市场，提供工厂直供价格，并确保从原材料到成品的质量可追溯。.
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.
答：Linsy 支持标准库存产品和定制生产订单的低起订量。起订量因产品形态、尺寸和热处理状态而异。请向我们的销售团队提供您的具体规格，以获取具体的起订量报价。.
答：标准库存产品将在3至7天内发货。定制生产订单通常需要10至60天，具体时间取决于合金种类、尺寸、状态、加工要求以及订单的复杂程度。.
A：是的，我们提供小块样品供质量评估。样品的供应情况取决于库存和规格。请联系我们并告知您的具体需求。.
答：我们接受电汇（T/T）和信用证（L/C）。标准付款条款为：下单时预付30%，发货前付70%。对于长期合作伙伴，可商讨定制条款。.
答：我们提供全球发货服务，包括欧洲、南美洲、非洲、中东和亚洲。根据订单规模和紧急程度，可选择海运、空运或快递服务。.
答：是的。所有 Linsy 铝制品均符合我们的质量管理体系（ISO 9001）标准。每笔订单均可通过其材料测试证书（MTC）进行追溯，我们保证订单确认书中载明的材料规格和尺寸公差均符合要求。.
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我们致力于保持最高标准的质量和环境责任，我们的认证证明了这一点：ISO 9001:2008、ISO 14001:2004 和 SGS 认证。
