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.
Formulaires disponibles : tôle / bobine / plaque / tube / barre / fil
Tempéraments courants : O / H12 / H14 / H16 / H18 / H112
Assistance technique : Usinage CNC / Découpe laser / Soudage TIG et MIG / Anodisation / Polissage
Documents relatifs à la qualité : Rapport MTC fourni avec chaque commande ; rapports d'essais SGS disponibles sur demande
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.
| Formulaire | Tempérer | Épaisseur (mm) | Largeur (mm) | Longueur (mm) |
|---|---|---|---|---|
| 3105 Sheet / Coil | O, H12, H14, H16, H18, H112 | 0.3 – 6.0 | 500 – 2600 | 500 – 16000 |
| Formulaire | Tempérer | Épaisseur (mm) | Largeur (mm) | Longueur (mm) |
|---|---|---|---|---|
| 3105 Plate | O, H12, H14, H112 | 6.0 – 150 | 500 – 2600 | 500 – 16000 |
| Formulaire | Tempérer | Diamètre extérieur (mm) | Paroi (mm) | Longueur (mm) |
|---|---|---|---|---|
| 3105 Tube | O, H12, H14, H16 | 6 – 200 | 1 – 50 | 1000 – 6000 |
| Formulaire | Tempérer | Diamètre (mm) | Longueur (mm) |
|---|---|---|---|
| 3105 Round Bar | O, H12, H14, H16, H112 | 3 – 200 | 1000 – 6000 |
| Formulaire | Tempérer | Diamètre (mm) | Poids / Bobine |
|---|---|---|---|
| 3105 Wire | O, H12, H14, H16 | 0.5 – 25 | 50 kg minimum |
3105 aluminum is recognized under international designations and product standards. The table below maps the most common equivalents used in procurement specifications.
| Standard | Désignation | Normes applicables aux produits |
|---|---|---|
| UNS | A93105 | — |
| FR | EN AW-3105 / EN AW-AlMn0.5Mg0.5 | EN 485, EN 573-3, EN 754, EN 755 |
| AA (Association de l'aluminium) | 3105 | ASTM B209, B210, B211, B221 |
| ISO | AlMn0.5Mg0.5 | ISO 6361 |
| JIS (Japon) | A3105 | JIS H4000, JIS H4040, JIS H4080 |
| GB (Chine) | 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 (%).
| Élément | Min % | Max % |
|---|---|---|
| Silicium (Si) | — | 0.6 |
| Fer (Fe) | — | 0.7 |
| Cuivre (Cu) | — | 0.3 |
| Manganèse (Mn) | 0.30 | 0.8 |
| Magnésium (Mg) | 0.20 | 0.8 |
| Chrome (Cr) | — | 0.2 |
| Zinc (Zn) | — | 0.4 |
| Titane (Ti) | — | 0.1 |
| Autres Chacun | — | 0.05 |
| Autres Total | — | 0.15 |
| Aluminium (Al) | — | Équilibre |
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.
| Propriété | Valeur typique |
|---|---|
| Résistance à la traction (MPa) | 100 – 145 |
| Limite d'élasticité (MPa) | ≥ 40 |
| Élongation (%) | ≥ 20 |
| Dureté (Brinell) | 30 |
| Propriété | Valeur typique |
|---|---|
| Résistance à la traction (MPa) | 145 – 185 |
| Limite d'élasticité (MPa) | ≥ 120 |
| Élongation (%) | ≥ 5 |
| Dureté (Brinell) | 42 |
| Propriété | Valeur typique |
|---|---|
| Résistance à la traction (MPa) | ≥ 190 |
| Limite d'élasticité (MPa) | ≥ 165 |
| Élongation (%) | ≥ 3 |
| Dureté (Brinell) | 55 |
Le trempage que vous choisissez détermine l'équilibre entre résistance, formabilité et finition de surface. Utilisez le guide ci-dessous pour choisir le trempage adapté à votre application.
| Tempérer | Description | Avantage principal | Applications typiques |
|---|---|---|---|
| O | Recuit — entièrement malléable | Formabilité et ductilité maximales | Deep-drawn parts, spinning, complex stampings, roll-formed gutters |
| H12 | Durci par déformation, 1/4 dur | Bonne formabilité avec un léger gain de résistance | Moderate forming, general sheet metal, trim |
| H14 | Durci par déformation, demi-dur | Le meilleur compromis entre résistance et formabilité | Residential siding, roofing sheets, flashing |
| H16 | Durci par déformation, 3/4 dur | Résistance plus élevée, formabilité limitée | Structural panels, signage, mobile home skirting |
| H18 | Durci par déformation, durcissement complet | Maximum strength for 3105 | Panneaux plats, éléments structurels non profilés |
| H112 | À l'état brut de fabrication (sans contrôle particulier de l'écrouissage) | Économique pour les tôles plus épaisses | Applications dans le domaine des tôles et des éléments de structure de forte épaisseur |
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.
| L'industrie | Applications | Why 3105 Is Used |
|---|---|---|
| Bâtiment et construction | 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 |
| CVC et thermique | Ailettes d'échangeurs thermiques, tubes de radiateurs, composants de climatiseurs | Conductivité thermique, aptitude au formage en feuilles minces |
| Chimie et industrie | Storage tanks for mild chemicals, drums, processing equipment | Résistance aux produits chimiques doux, soudabilité, non toxique |
| Alimentation et cuisine | 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:
| Comparaison | Différence essentielle | 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.
Nous fournissons des acheteurs du monde entier, notamment en Europe, en Afrique du Sud, au Brésil, à Singapour, en Turquie, au Japon, en Corée du Sud et sur d'autres marchés asiatiques, en proposant des prix directs d'usine et une qualité traçable, de la matière première au produit fini.
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 : Linsy propose des quantités minimales de commande (MOQ) réduites pour les articles en stock standard et les commandes de production sur mesure. La MOQ varie en fonction de la forme, de la taille et de la trempe du produit. Contactez notre équipe commerciale en précisant vos spécifications pour obtenir un devis avec la MOQ correspondante.
R : Les articles en stock sont expédiés sous 3 à 7 jours. Les commandes de fabrication sur mesure nécessitent généralement un délai de 10 à 60 jours, en fonction de l'alliage, des dimensions, du état de durcissement, des exigences de traitement et de la complexité de la commande.
R : Oui, nous fournissons de petits échantillons pour permettre d'évaluer la qualité. La disponibilité des échantillons dépend des stocks et des spécifications. N'hésitez pas à nous contacter pour nous faire part de vos besoins.
R : Nous acceptons les paiements par virement bancaire (T/T) et par lettre de crédit (L/C). Les conditions de paiement standard sont les suivantes : 30% d'acompte à la commande et 70% avant l'expédition. Des conditions personnalisées peuvent être négociées dans le cadre de partenariats à long terme.
R : Nous expédions dans le monde entier, notamment en Europe, en Amérique du Sud, en Afrique, au Moyen-Orient et en Asie. Les options d'expédition comprennent le transport maritime, le transport aérien et les services de messagerie, en fonction du volume de la commande et de son urgence.
R : Oui. Tous les produits en aluminium Linsy sont couverts par notre système de gestion de la qualité (ISO 9001). Chaque commande est traçable grâce à son numéro MTC, et nous garantissons le respect des spécifications des matériaux et des tolérances dimensionnelles indiquées dans la confirmation de commande.
Avantages pour Linsy
Linsy Aluminum est un fournisseur de premier plan de produits de transformation de l'aluminium, au service de diverses industries, notamment l'aérospatiale, l'ingénierie générale, l'automobile, la marine, la construction navale et d'autres applications industrielles spécialisées.
Nous nous engageons à respecter les normes les plus strictes en matière de qualité et de responsabilité environnementale, comme en témoignent nos certifications : ISO 9001:2008， ISO 14001:2004 et SGS.
