3003 aluminum flat bar is a non-heat-treatable Al-Mn alloy widely used in chemical equipment, HVAC ductwork, general fabrication, and storage tank framing. It offers excellent corrosion resistance, good weldability, and moderate strength — approximately 20% stronger than 1100 aluminum. Linsy supplies 3003 flat bars in tempers O, H14, H22, H112, and F, with custom dimensions, cut-to-length service, surface finishing options, and MTC reports included with every order.
Formularios disponibles: flat bar / rectangular bar
Temperamentos habituales: O / H14 / H22 / H112 / F
Asistencia técnica: corte a medida / mecanizado CNC / soldadura TIG y MIG / anodizado / cepillado / pulido
Documentos de calidad: Informe MTC con cada pedido; ensayos de SGS bajo petición
3003 aluminum flat bar is a rectangular cross-section bar made from 3003 Al-Mn (aluminum-manganese) alloy. As a non-heat-treatable wrought alloy, 3003 derives its strength from cold working rather than precipitation hardening. The flat bar form is typically produced by extrusion (in H112 or F temper) or by cutting from strain-hardened sheet/strip stock (in H14, H22, or O temper).
With 1.0–1.5% manganese as its primary alloying element, 3003 offers approximately 20% higher strength than commercially pure 1100 aluminum while retaining excellent corrosion resistance, formability, and weldability. It is widely specified for chemical equipment, storage tanks, ductwork, and general fabrication where flat bar stock is required for machining, welding, or structural framing.
Common tempers for 3003 flat bar include O (totalmente recocido, máxima conformabilidad), H14 (half hard, good balance of strength and formability), and H22 (strain-hardened then partially annealed, stable strength with good formability). Linsy supplies 3003 flat bars in these tempers with custom cut-to-length, surface finishing, and MTC reports available for every order.
Linsy supplies 3003 aluminum flat bars in standard and custom sizes. Both metric and imperial dimensions are available. Custom cut-to-length, edge rounding, and surface finishing (mill finish, anodized, or brushed) can be specified at order.
| Espesor (mm) | Anchura (mm) | Longitud (mm) | Temperamentos comunes |
|---|---|---|---|
| 3 – 6 | 20 – 150 | 1000 – 6000 (custom on request) | O, H14, H22 |
| 6 – 12 | 25 – 200 | 1000 – 6000 (custom on request) | O, H14, H112 |
| 12 – 50 | 30 – 300 | 1000 – 6000 (custom on request) | O, H112, F |
Note: Thickness, width, and length can be customized to your drawing or specification. Contact us with your required dimensions for a quick quote.
3003 aluminum flat bar is supplied in accordance with major international standards. If your project requires a specific standard or certificate, please specify it when requesting a quote.
| Estándar | Denominación |
|---|---|
| AA (Asociación del Aluminio) | 3003 |
| UNS | A93003 |
| EN / DIN | EN AW-3003 / AlMn1Cu |
| ISO | AlMn1Cu |
| JIS H 4000 | A3003 |
| GB/T 3190 | 3003 |
| ASTM B211 | 3003: barras, varillas y alambre |
| ASTM B221 | 3003: barras extruidas, varillas, alambre y perfiles |
Los siguientes límites de composición química se aplican al aluminio 3003 según las normas ASTM B211 y EN 573-3. Todos los valores se expresan en porcentaje en peso (%).
| Elemento | Mín. % | Máx. % |
|---|---|---|
| Silicio (Si) | — | 0.6 |
| Hierro (Fe) | — | 0.7 |
| Cobre (Cu) | 0.05 | 0.20 |
| Manganeso (Mn) | 1.0 | 1.5 |
| Magnesio (Mg) | — | 0.05 |
| Cromo (Cr) | — | 0.05 |
| Zinc (Zn) | — | 0.10 |
| Titanio (Ti) | — | 0.05 |
| Otros Cada uno | — | 0.05 |
| Otros Total | — | 0.15 |
| Aluminio (Al) | — | Saldo |
The mechanical properties of 3003 flat bar depend on the temper and the product form (extruded vs. cut from sheet). The values below are typical for bar and extruded stock. Always request an MTC report for certified values on your specific batch.
| Propiedad | Valor típico |
|---|---|
| Resistencia a la tracción (MPa) | 95 – 130 |
| Límite elástico (MPa) | ≥ 35 |
| Alargamiento (%) | ≥ 25 |
| Dureza (Brinell) | ~ 28 |
| Propiedad | Valor típico |
|---|---|
| Resistencia a la tracción (MPa) | 140 – 180 |
| Límite elástico (MPa) | ≥ 115 |
| Alargamiento (%) | ≥ 5 |
| Dureza (Brinell) | ~ 40 |
| Propiedad | Valor típico |
|---|---|
| Resistencia a la tracción (MPa) | 95 – 145 |
| Límite elástico (MPa) | ≥ 35 |
| Alargamiento (%) | ≥ 18 |
Select the right temper for your flat bar application based on the required strength, formability, and post-machining stability.
| Temple | Descripción | Ventaja principal | When to Use for Flat Bar |
|---|---|---|---|
| O | Recocido — totalmente blando | Máxima conformabilidad y ductilidad | Bending, forming, or welding where maximum ductility is required |
| H14 | Endurecido por deformación, semiduro | Buen equilibrio entre resistencia y maleabilidad | General fabrication, brackets, flat patterns that need moderate strength |
| H22 | Endurecido por deformación y posteriormente recocido parcialmente | Resistencia estable y buena conformabilidad | Flat bar that will be formed after delivery; better stability than H14 |
| H112 | Tal y como se ha extruido | No special control — economical | Structural flat bar where surface finish is less critical |
3003 aluminum offers excellent resistance to atmospheric corrosion, including in marine and industrial environments. The manganese addition suppresses intergranular corrosion, making 3003 suitable for outdoor structural applications, chemical storage, and marine non-critical parts. It performs well in contact with fresh water, mild chemicals, and food products without requiring protective coating.
3003 flat bar in O or H14 temper can be cold bent, drilled, tapped, and machined with standard tools. It is rated as highly weldable by TIG (GTAW), MIG (GMAW), and resistance welding. Filler metal 4043 or 1100 is recommended. Note that welding anneals the heat-affected zone in strain-hardened tempers, reducing local strength — consider using O temper bar if extensive welding is required.
3003 has fair machinability — softer than heat-treatable alloys like 6061 or 2011. Use sharp tools, positive rake angles, and appropriate cutting speeds to avoid built-up edge. O temper machines more smoothly than H14; chip breakers are recommended for continuous cuts.
| Industria | Aplicaciones | Why 3003 Flat Bar Is Used |
|---|---|---|
| Procesado químico | Tank supports, framing, pipe brackets, walkways | Resistencia a la corrosión, soldabilidad, resistencia moderada |
| Climatización y conductos | Duct flanges, mounting bars, support frames | Formability, corrosion resistance, weldability |
| Fabricación general | Brackets, base plates, spacers, machine guards | Good workability, readily available, cost-effective |
| Almacenamiento y transporte | Tank straps, trailer frames, cargo tie-down bars | Weldability, corrosion resistance, moderate strength |
| Architectural | Trim, flashing details, decorative flat stock | Good surface finish acceptance, formability, corrosion resistance |
| Food & Beverage | Food processing equipment frames, washdown brackets | Food-safe, corrosion resistant, easy to clean (no reactive contaminants) |
Linsy can supply 3003 flat bar with processing and finishing options applied before delivery:
Linsy provides the following quality documentation with every 3003 flat bar order:
Todas las instalaciones de Linsy cuentan con la certificación de ISO 9001, ISO 14001 e ISO 45001. Los certificados de ensayo de fábrica hacen referencia a la norma ASTM o EN aplicable utilizada en la producción.
Ventajas de Linsy
Linsy Aluminum es un proveedor líder de productos de procesamiento de aluminio, que presta servicio a diversas industrias, como la aeroespacial, la ingeniería general, la automoción, la marina, la construcción naval y otras aplicaciones industriales especializadas.
Nos comprometemos a mantener los más altos estándares de calidad y responsabilidad medioambiental, como demuestran nuestras certificaciones: ISO 9001:2008， ISO 14001:2004 y SGS.
