Aluminium Alloy 6063 Round Bars

What is Aluminium Alloy 6063 Round Bar?

Aluminium Alloy 6063 is a wrought aluminium-magnesium-silicon alloy that is particularly valued for extrusion, surface finish, and corrosion resistance. Belonging to the 6xxx series, it is heat-treatable and can achieve good strength while maintaining excellent workability.

Key features of Aluminium 6063 round bars:

• Excellent corrosion resistance in atmospheric and marine environments
• Good mechanical strength for moderate structural applications
• Superior surface finish for architectural and decorative applications
• High machinability and good weldability
• Lightweight and easy to fabricate
• Heat-treatable for improved mechanical properties

Aluminium Alloy 6063 round bars are widely used in construction, architectural frameworks, transportation, and industrial machinery where a combination of strength, aesthetics, and corrosion resistance is required.

Key Features of Aluminium Alloy 6063 Round Bars

• Excellent corrosion resistance, especially in marine and outdoor environments
• Smooth surface finish, ideal for anodizing and decorative applications
• Heat-treatable to enhance strength and hardness
• Lightweight and easy to handle for construction and engineering applications
• Excellent machinability for turning, milling, and drilling
• Good weldability using standard aluminium welding processes
• Suitable for both structural and decorative applications

These properties make Aluminium Alloy 6063 round bars ideal for architectural, structural, and industrial applications where both functionality and aesthetics are important.

Chemical Composition of Aluminium Alloy 6063 (%)

• Silicon (Si): 0.2 – 0.6%
• Magnesium (Mg): 0.45 – 0.9%
• Iron (Fe): ≤ 0.35%
• Copper (Cu): ≤ 0.1%
• Manganese (Mn): ≤ 0.1%
• Zinc (Zn): ≤ 0.1%
• Chromium (Cr): ≤ 0.1%
• Titanium (Ti): ≤ 0.1%
• Aluminium (Al): Balance

Role of Alloying Elements

• Silicon: Provides hardness, improves corrosion resistance, and enhances extrudability
• Magnesium: Strengthens the alloy and improves corrosion resistance
• Aluminium: Offers lightweight and high ductility
• Trace Elements: Control grain structure and dimensional stability

This combination ensures excellent corrosion resistance, surface finish, and moderate mechanical strength for 6063 aluminium round bars.

Mechanical Properties of Aluminium Alloy 6063 Round Bars

Aluminium Alloy 6063 exhibits good mechanical performance particularly in T6/T651 heat-treated condition:

• Tensile Strength: 170 – 210 MPa
• Yield Strength: 70 – 120 MPa
• Elongation: 12 – 25%
• Brinell Hardness: 60 – 75 HB

These properties make Aluminium Alloy 6063 round bars suitable for architectural frameworks, lightweight structural components, and decorative engineering applications.

Physical Properties of Aluminium Alloy 6063 Round Bars

• Density: 2.70 g/cm³
• Melting Range: 608 – 650°C
• Thermal Conductivity: 201 W/m·K
• Electrical Conductivity: 25% IACS
• Modulus of Elasticity: 69 GPa
• Coefficient of Thermal Expansion: 23.4 µm/m°C

The combination of lightweight, corrosion resistance, and surface finish makes 6063 aluminium round bars ideal for architectural, industrial, and construction applications.

Heat Treatment of Aluminium Alloy 6063 Round Bars

Aluminium Alloy 6063 is heat-treatable, and its mechanical properties can be enhanced through artificial aging:

Solution Heat Treatment (T6)

• Heat to 530 – 550°C
• Quench in water rapidly
• Artificial aging at 160 – 180°C for several hours

T651 Temper

• Solution heat-treated, stress-relieved by stretching
• Ensures dimensional stability and improved mechanical properties

Heat treatment improves tensile strength, hardness, and surface integrity of 6063 aluminium bars.

Machinability of Aluminium Alloy 6063 Round Bars

6063 aluminium round bars are highly machinable, making them suitable for precision engineering:

• Compatible with turning, milling, drilling, and CNC machining
• Produces smooth finishes and precise tolerances
• Easy to fabricate for structural and architectural applications
• Cutting fluids recommended to maintain surface finish

Corrosion Resistance of Aluminium Alloy 6063 Round Bars

• Excellent corrosion resistance in atmospheric, marine, and industrial environments
• Suitable for anodizing to further improve surface protection and aesthetics
• Performs well in outdoor applications with minimal maintenance
• Resistant to oxidation, rainwater, and moderate industrial chemicals

This makes 6063 aluminium round bars ideal for architectural, marine, and construction applications.

Weldability of Aluminium Alloy 6063 Round Bars

Aluminium Alloy 6063 is easily weldable with standard welding methods:

• TIG (GTAW), MIG (GMAW), and spot welding are suitable
• Excellent weld strength in T6 and T651 tempers
• Filler metals: 4043 or 5356 compatible for corrosion-resistant welds
• Post-weld aging may be applied to restore mechanical strength

Proper welding ensures durable and structurally sound assemblies.

Available Sizes & Specifications

Aluminium Alloy 6063 Round Bars are supplied in:

Standards:

• ASTM B221
• ISO 6361
• EN 573 / 485

Size Range:

• Diameter: 6 mm – 300 mm
• Length: 3m, 6m, or customized cut lengths
• Tolerances: As per ASTM / ISO standards

Surface Finish:

• Hot Rolled / Bright
• Polished
• Centerless Ground

Applications of Aluminium Alloy 6063 Round Bars

Aluminium Alloy 6063 is widely used in architectural, industrial, and marine applications:

Architectural & Construction

• Window frames, doors, and curtain walls
• Railings, staircases, and balustrades
• Decorative structural components

Industrial Applications

• Shafts, rods, and mechanical components
• Tooling and fixtures
• Light-duty machinery parts

Automotive & Transportation

• Lightweight vehicle components
• Heat exchangers and HVAC components
• Structural frames for buses, trucks, and rail vehicles

Other Applications

• Marine fittings and lightweight boat components
• Signage and decorative metalwork
• Any application requiring corrosion-resistant, lightweight, and aesthetically appealing aluminium bars

Advantages of Aluminium Alloy 6063 Round Bars

• Excellent corrosion resistance in marine and outdoor environments
• Lightweight yet mechanically durable
• High surface finish quality for anodizing and decorative purposes
• Heat-treatable for improved strength
• Easily machinable and weldable
• Suitable for both structural and decorative applications
• Long-lasting performance in industrial, architectural, and marine environments

Quality Testing & Inspection

All Aluminium Alloy 6063 round bars undergo:

• Chemical composition analysis
• Mechanical property testing
• Hardness testing
• Dimensional inspection
• Surface finish verification

Mill Test Certificates (MTC) are provided per ASTM and ISO standards. Third-party inspection is available upon request.

Why Choose Virami Steel Hub for Aluminium Alloy 6063 Round Bars?

• Trusted aluminium alloy manufacturer and supplier in Mumbai, India
• High-quality architectural, industrial, and marine-grade aluminium alloys
• Competitive pricing with fast delivery
• Custom sizes, lengths, and tempers available
• Certified quality assurance and MTC
• Expertise in architectural, marine, automotive, and industrial applications

Conclusion

Aluminium Alloy 6063 Round Bars are high-quality, heat-treatable aluminium-magnesium-silicon alloys offering excellent corrosion resistance, good mechanical strength, and high surface finish quality. Ideal for architectural, industrial, automotive, and marine applications, Aluminium 6063 ensures durability, lightweight performance, and aesthetic appeal.

Virami Steel Hub supplies certified Aluminium Alloy 6063 Round Bars with customizable sizes and reliable testing, making it the preferred choice for critical engineering, structural, architectural, and marine applications.