Aluminijska legura 6061: Sveobuhvatne tehničke specifikacije i vodič za primjenu
As a professional aluminum supplier and exporter based in Bandung, we are committed to providing global clients with high-quality aluminum materials that meet international standards. Aluminijska legura 6061 is one of the most popular and widely used grades in our core export product portfolio. This article provides a comprehensive technical introduction to Aluminum Alloy 6061, helping you gain an in-depth understanding of the properties, tehnički podaci, and applications of this “versatile aluminum alloy.”
1. Alloy Overview and Metallurgical Characteristics
Alloy Family: 6061 belongs to the Al-Mg-Si series of heat-treatable strengthening aluminum alloys.
Primary Strengthening Phase: Mg₂Si
Standard Temper: T6 (Solution heat-treated and then artificially aged) is the most commonly supplied condition.
International Standard Equivalents:
- Kina: 6061 (GB/T 3190)
- SAD: 6061 (ASTM B221, ASTM B211)
- Europi: EN AW-6061 (U 573)
- Japan: A6061 (JIS H4000)
2. Detailed Chemical Composition Analysis
Kemijski sastav od 6061 aluminum alloy is strictly controlled to ensure consistent performance.
| Element | Raspon sadržaja (%) | Function and Influence |
|---|---|---|
| Silicij (I) | 0.40-0.80 | Forms the Mg₂Si strengthening phase with magnesium, increasing strength. |
| Željezo (Fe) | ≤0,70 | Element nečistoće, content must be controlled. |
| Bakar (Cu) | 0.15-0.40 | Improves strength and corrosion resistance. |
| Mangan (Mn) | ≤0.15 | Pročišćava strukturu zrna, improves strength. |
| Magnezij (Mg) | 0.80-1.20 | Forms the primary strengthening phase Mg₂Si with silicon. |
| Krom (Kr) | 0.04-0.35 | Controls grain structure, improves corrosion resistance. |
| Cinkov (Zn) | ≤0,25 | Element nečistoće, content must be controlled. |
| Titanijum (Od) | ≤0.15 | Pročišćava strukturu zrna, improves casting properties. |
| Ostali elementi | ≤0,05 (svaki) ≤0.15 (ukupno) |
– |
| Aluminij (Al) | Uravnotežiti | Obični metal. |
3. Comprehensive Physical and Mechanical Properties
Fizička svojstva:
- Gustoća: 2.70 g/cm³ (cca. 1/3 that of steel)
- Raspon topljenja: 582-652°C
- Specifični toplinski kapacitet: 896 J/(kg·K) na 20°C
- Koeficijent toplinskog širenja: 23.6×10⁻⁶/K (20-100°C)
- Toplinska vodljivost: 167 W/(m·K) (T6 temper)
- Električna vodljivost: 40-50% IACS (Međunarodni standard za žareni bakar)
- Modul elastičnosti: 68.9 GPa
- Poissonov omjer: 0.33
Mehanička svojstva (Typical values for T6 temper):
| Vlasništvo | Raspon vrijednosti | Test Standard |
|---|---|---|
| Vlačna čvrstoća (Rm) | 310-380 MPa | ASTM E8/E8M |
| Granica tečenja (Rp0.2) | 276-345 MPa | ASTM E8/E8M |
| Elongacija (A50mm) | 10-17% | ASTM E8/E8M |
| Tvrdoća | 95-100 HB | ASTM E10 |
| Snaga zamora | 96 MPa (5×10⁸ cycles) | – |
| Snaga smicanja | 207 MPa | – |
4. Detailed Explanation of Heat Treatment Tempers
6061 aluminum alloy can achieve desired properties through different heat treatments:
| Temper Designation | Heat Treatment Process | Ključne karakteristike | Tipične primjene |
|---|---|---|---|
| T4 | Solution heat-treated and naturally aged. | Umjerena snaga, dobra sposobnost oblikovanja. | Components requiring subsequent forming. |
| T6 | Solution heat-treated and artificially aged. | Visoka snaga, good overall performance. | Strukturni dijelovi, mechanical components. |
| T651 | Solution heat-treated, stress-relieved by stretching, and artificially aged. | Stress-relieved, excellent dimensional stability. | Precision machined parts. |
| T6511 | Slightly stress-relieved by stretching. | Reduced residual stress, improved flatness. | Tanak list, precision components. |
| O | Žareno. | Meko, izvrsna sposobnost oblikovanja. | Components requiring deep forming. |
5. Product Forms and Standard Specifications
Mi opskrbljujemo 6061 aluminum in various forms to meet different processing needs.
Aluminum Profiles (Extruded):
- Minimum Cross-Section Size: Circumcircle diameter up to 250mm.
- Wall Thickness Range: 0.8MM-12mm (depending on design).
- Duljina: Standard 6 metara, prilagodljiv.
- Tolerances: Comply with ASTM B221.
Aluminum Sheet/Coil:
- Raspon debljine: 0.3mm-150mm.
- Raspon širine: 500mm-2500mm.
- Površinska obrada: F (as-fabricated), H112 (hot-finished), O (žarkin), T6/T651.
- Special Requests: Stress-relieved (stretcher leveled) plate available.
Aluminum Bar:
- Raspon promjera: φ5mm-φ500mm.
- Oblici: Krug, square, hexagon.
- Supply Tempers: T6, T6511, O.
- Tolerance Grades: Hot-rolled, forged, precision drawn.
Aluminum Tube/Pipe:
- Outer Diameter Range: φ6mm-φ300mm.
- Wall Thickness Range: 0.5mm-25mm.
- Vrste: Seamless, zavareni.
- Standardi: Comply with ASTM B210/B221.
6. Machining and Fabrication Properties
Obradivost:
- Machinability Rating: Dobro (cca. 50% relative to Alloy 2011 rated at 100%).
- Recommended Cutting Speeds: HSS tools 60-90 m/moj, Carbide tools 120-240 m/moj.
- Površinska obrada: Good machined surface obtainable.
Zavarljivost:
- Gas Tungsten/ Metal Inert Gas (TIG/ME) Zavarivanje: Izvrsno.
- Resistance Welding: Dobro.
- Gas Welding: Ne preporučuje se.
- Post-Weld Treatment: Can be re-heat-treated to restore properties.
- Filler Materials: 4043 ili 5356 aluminum welding wire.
Mogućnost oblikovanja:
- Cold Working: Dobro (Best in annealed -O temper).
- Hot Working Temperature: 370-480°C.
- Minimalni radijus savijanja: Približno 1-2 times material thickness (depends on temper).
7. Surface Treatment Options
We can provide or recommend various surface treatments:
| Treatment Type | Process Description | Debljina premaza / Učinak | Primjenjivi standardi |
|---|---|---|---|
| Anodiziranje | Sulfuric acid anodizing, colorable. | 5-25µm | MIL-A-8625, ISO 7599 |
| Kemijski pretvorbeni premaz | Chromate or chrome-free treatment. | 0.3-1.0µm | MIL-DTL-5541 |
| Premazivanje prahom | Electrostatic spray and bake curing. | 40-120µm | AMAMA 2604/2605 |
| Sandblasting/Bead Blasting | Mechanical blasting for uniform matte finish. | Controllable surface roughness. | Customer specification. |
| Polishing/Brushing | Mechanical or chemical polishing. | Mirror or brushed finish. | Customer specification. |
8. Corrosion Resistance and Environmental Suitability
- Atmospheric Corrosion: Good resistance, especially in dry and rural environments.
- Pucanje od korozije pod naponom (SCC) Susceptibility: Good resistance in T6 temper.
- Marine Environment: Moderate resistance; significantly improved after anodizing.
- Acid/Alkali Environments: Resistant to weak acids/alkalis; corrodes in strong acids/alkalis.
- Contact with Other Metals: Avoid direct contact with dissimilar metals like copper, steel to prevent galvanic corrosion.
9. Quality Control and Certifications
We ensure all exported 6061 Aluminum Alloy complies with the following standards:
Materijalno certificiranje:
- Mill Test Certificate (MTC) provided for each batch.
- Chemical composition meets standard requirements.
- Mechanical property test report.
- Dimensional tolerance inspection report.
Sljedivost:
- Complete production batch records.
- Heat treatment records.
- Inspection and test records retained for at least 10 godina.
Third-Party Certification:
- Third-party inspection (Npr., SGS, BV, TUV) can be arranged.
- Complies with environmental directives like RoHS, REACH.
- Special certifications provided per customer request.
10. Packaging and Shipping Standards
We provide professional packaging to ensure product quality during international shipping.
| Vrsta proizvoda | Standard Packing Method | Special Protection | Marking Requirements |
|---|---|---|---|
| Profiles/Bars | Wrapped in waterproof paper, bundled in wooden cases or metal racks. | End caps, moisture-proof paper. | Shipping mark, specs, weight, batch no. |
| Sheets/Plates | Wooden pallets, separated by anti-rust paper, steel strapped. | Edge protectors, desiccant. | Lifting marks, fragile marks. |
| Precision Parts | Custom wooden crates, foam positioning, anti-rust treatment. | VCI paper, individual wrapping. | “This Side Up” marks, center of gravity marks. |
11. Global Application Cases
Naše 6061 Aluminum Alloy has been successfully used in various international projects:
European Market:
- German Automotive Parts Manufacturer: Structural components for EV battery trays.
- Italian Industrial Equipment Company: High-precision machine tool rails and brackets.
- Dutch Bicycle Manufacturer: Tubing for high-end aluminum bicycle frames.
American Market:
- US Aerospace Tier-2 Supplier: Aircraft interior structural parts.
- Canadian Solar Company: Photovoltaic mounting system structures.
- Brazilian Construction Firm: Curtain wall system profiles.
Asian Market:
- Japanese Electronics Company: Frames for semiconductor equipment.
- Korean Marine Equipment Supplier: Ship structural components.
- Singapore Medical Device Company: Chassis for medical equipment.
Oceania Market:
- Australian Mining Equipment Manufacturer: Lightweight equipment parts.
- New Zealand Fishing Company: Structural parts for fishing vessels.
12. Material Selection and Design Advice
When to Choose 6061 Aluminijska legura:
- Requires a good strength-to-weight ratio.
- Requires good machinability and weldability.
- Requires moderate corrosion resistance.
- Cost-effectiveness is an important consideration.
- Requires surface treatments like anodizing.
When to Consider Other Alloys:
- Need higher strength: Consider 7075 ili 2024.
- Need better corrosion resistance: Consider 5052 ili 5083.
- Need better formability: Consider 3003 ili 1100.
- Need higher temperature performance: Consider 2xxx series.
Design Considerations:
- Recommended minimum bend radius is 1.5-2 times material thickness.
- Strength is reduced in welded areas; consider appropriate reinforcement.
- Ensure proper heat dissipation during machining to avoid overheating material.
- Ensure thorough cleaning and degreasing before anodizing.
We understand that selecting the correct aluminum material is crucial to the success of your product. Aluminijska legura 6061, with its excellent overall performance and cost-effectiveness, is one of the most popular choices in global manufacturing. Osim toga 6061, we also supply other aluminum alloy series, uključujući 5000 i 7000 niz, to meet diverse application needs.
We Can Provide:
- Detailed Technical Data Sheets (TDS) and Material Safety Data Sheets (MSDS).
- Free samples for your testing and verification.
- Technical consultation for your specific application.
- Competitive FOB/CIF quotations.
- Flexible Minimum Order Quantities (MOQ) and customization services.
For more information, to request samples, or to discuss your specific requirements, please feel free to contact our international sales team. We offer multilingual support to ensure smooth communication and will recommend the most suitable material specifications, ćudi, and heat treatment processes based on your application.