3003 aluminum square bar is a non-heat-treatable Al-Mn alloy bar with a square cross-section, widely used in structural framing, machining blanks, decorative trim, chemical equipment supports, and general fabrication. It offers excellent corrosion resistance, good formability and weldability, and moderate strength — approximately 20% stronger than 1100 aluminum. Linsy supplies 3003 square bars in tempers O, H14, H22, H112, and F, with custom side dimensions, cut-to-length service, surface finishing options, and MTC reports included with every order.
Доступные формы: square bar / rectangular bar
Распространенные типы характера: O / H14 / H22 / H112 / F
Поддержка обработки: резка в размер / обработка на станках с ЧПУ / сварка TIG и MIG / анодирование / щеточная обработка / полировка
Документы по качеству: Протокол MTC с каждым заказом, испытания SGS по запросу
3003 aluminum square bar is a bar with a square cross-section, 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. Square bar is typically produced by extrusion (in H112 or F temper) or fabricated by cutting from strain-hardened sheet or plate 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. Square bar is widely specified for structural framing, machining blanks, decorative applications, tank supports, and general fabrication where a square cross-section is required for ease of fixturing, assembly, or aesthetic preference.
Common tempers for 3003 square bar include O (полностью отожженный, максимальная формуемость), H14 (half hard, good balance of strength and workability), and H22 (strain-hardened then partially annealed, stable strength with good formability). Linsy supplies 3003 square bars in these tempers with custom side dimensions, cut-to-length, surface finishing, and MTC reports available for every order.
Linsy supplies 3003 aluminum square bars in standard and custom sizes. Both metric and imperial dimensions are available. Custom cut-to-length, edge conditioning (chamfered or radiused edges), and surface finishing (mill finish, anodized, or brushed) can be specified at order.
| Side (mm) | Длина (мм) | kg/m (Approx.) | Распространенные состояния |
|---|---|---|---|
| 5 – 12 | 1000 – 4000 | 0.07 – 0.39 | O, H14, H22 |
| 12 – 25 | 1000 – 5000 | 0.39 – 1.69 | O, H14, H112 |
| 25 – 50 | 1000 – 6000 | 1.69 – 6.75 | O, H22, H112, F |
| 50 – 60 | 1000 – 6000 | 6.75 – 9.72 | H112, F |
Note: Side dimension and length can be customized to your drawing or specification. Non-standard sizes and tighter tolerances are available on request. Contact us with your required dimensions for a quick quote.
3003 aluminum square 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.
| Стандарт | Наименование |
|---|---|
| AA (Ассоциация производителей алюминия) | 3003 |
| UNS | A93003 |
| EN / DIN | EN AW-3003 / AlMn1Cu |
| ISO | AlMn1Cu |
| JIS H 4000 | A3003 |
| GB/T 3190 | 3003 |
| ASTM B211 | 3003 пруток, стержень и проволока |
| ASTM B221 | 3003 экструдированный пруток, стержень, проволока, профили |
Следующие пределы химического состава применяются к алюминию 3003 в соответствии с ASTM B211 и EN 573-3. Все значения указаны в массовых процентах (%).
| Элемент | Мин. % | Макс. % |
|---|---|---|
| Кремний (Si) | — | 0.6 |
| Железо (Fe) | — | 0.7 |
| Медь (Cu) | 0.05 | 0.20 |
| Марганец (Mn) | 1.0 | 1.5 |
| Магний (Mg) | — | 0.05 |
| Хром (Cr) | — | 0.05 |
| Цинк (Zn) | — | 0.10 |
| Титан (Ti) | — | 0.05 |
| Прочие, каждый | — | 0.05 |
| Прочие, всего | — | 0.15 |
| Алюминий (Al) | — | Баланс |
The mechanical properties of 3003 square bar depend on the temper and the product form (extruded vs. fabricated from plate). The values below are typical for bar stock. Always request an MTC report for certified values on your specific batch.
| Недвижимость | Типичное значение |
|---|---|
| Прочность на разрыв (МПа) | 95 – 130 |
| Предел текучести (МПа) | ≥ 35 |
| Удлинение (%) | ≥ 25 |
| Твердость (Бринелль) | ~ 28 |
| Недвижимость | Типичное значение |
|---|---|
| Прочность на разрыв (МПа) | 140 – 180 |
| Предел текучести (МПа) | ≥ 115 |
| Удлинение (%) | ≥ 5 |
| Твердость (Бринелль) | ~ 40 |
| Недвижимость | Типичное значение |
|---|---|
| Прочность на разрыв (МПа) | 95 – 145 |
| Предел текучести (МПа) | ≥ 35 |
| Удлинение (%) | ≥ 18 |
Select the right temper for your square bar application based on the required strength, formability, and post-machining stability.
| Темпер | Описание | Основное преимущество | When to Use for Square Bar |
|---|---|---|---|
| O | Отожженный — полностью мягкий | Максимальная формуемость и пластичность | Deep forming, bending to tight radii, or where the square bar will undergo extensive welding or machining with chip control |
| H14 | Нагартованный, 1/2 твердый | Хороший баланс прочности и формуемости | General fabrication, brackets, structural members that require moderate strength and can be bent to moderate radii |
| H22 | Нагартованный с последующим частичным отжигом | Стабильная прочность с хорошей формуемостью | Square bar that will be formed after delivery; better long-term stability than H14 |
| H112 | После экструзии | No special strain-hardening control — economical | Structural square bar where surface finish and mechanical property consistency are less critical |
3003 aluminum offers excellent resistance to atmospheric corrosion, including in marine and industrial environments. The manganese addition suppresses intergranular corrosion, making 3003 square bar 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 a protective coating.
3003 square bar in O, H14, or H22 temper can be cold bent, drilled, tapped, and machined with standard tooling. 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 planned.
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. For square bar used as a machining blank, centerless or blanchard grinding may be specified for tighter tolerance surfaces.
| Промышленность | Приложения | Why 3003 Square Bar Is Used |
|---|---|---|
| Химическая обработка | Tank supports, pipe brackets, walkway framing | Коррозионная стойкость, свариваемость, умеренная прочность |
| HVAC и воздуховоды | Duct framing, equipment stands, mounting bars | Formability, corrosion resistance, workability |
| Общее производство | Machining blanks, spacers, fixturing, brackets | Square cross-section for easy clamping/jigging, cost-effective |
| Decorative & Architectural | Trim, railing components, display stands, furniture components | Clean square edges, good surface finish acceptance, formability |
| Хранение и транспортировка | Cargo tie-down bars, rack supports, trailer trim | Weldability, corrosion resistance, cost-effective |
| Food & Beverage Equipment | Washdown frames, equipment supports, conveyor guides | Food-safe, corrosion resistant, easy to clean |
Linsy can supply 3003 square bar with processing and finishing options applied before delivery:
Linsy provides the following quality documentation with every 3003 square bar order:
Все предприятия Linsy сертифицированы по стандартам ISO 9001, ISO 14001 и ISO 45001. Заводские сертификаты испытаний ссылаются на соответствующий стандарт ASTM или EN, используемый в производстве.
Преимущества Linsy
Linsy Aluminum - ведущий поставщик продукции для обработки алюминия, обслуживающий различные отрасли промышленности, включая аэрокосмическую, общее машиностроение, автомобильную, морскую, судостроительную и другие специализированные промышленные приложения.
Мы стремимся поддерживать самые высокие стандарты качества и экологической ответственности, о чем свидетельствуют наши сертификаты: ISO 9001:2008, ISO 14001:2004 и SGS.