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6063 Aluminum Bar - T5 & T6 Round, Square Bars | Shanghaibozhong metal

Aluminium Alloy 6063 Strips/Coils/Sheets/Plates/Bars/Pipes/Tubes/Extrusions


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Tempers: T5, T6 (T4, T52 available on request)

Shapes & Sizes:

Round Bar: 3mm – 300mm

Square Bar: 10mm – 150mm

Flat Bar: 3mm – 50mm × 10mm – 100mm

Hex Bar: 6mm – 60mm

Lengths: 3000mm / 3660mm / 6000mm, custom cut-to-length

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Product Description

Architectural Grade

Aluminium Alloy 6063 Strips/Coils/Sheets/Plates/Bars/Pipes/Tubes/Extrusions

A medium-strength heat-treatable alloy with exceptional surface finish, superior corrosion resistance, and excellent extrudability — the industry standard for architectural, furniture, and precision-machined components.

ASTM B221 EN 573-3 GB/T 3191 ISO 9001

6063

Aluminum Alloy

Round

Square

Hex

Flat

Product Overview

What is 6063 aluminum alloy and why it matters

6063 aluminum alloy is a medium-strength, heat-treatable alloy in the Al-Mg-Si (aluminum-magnesium-silicon) family. Often called an "architectural alloy," it is the most widely used extrusion alloy globally, prized for its smooth surface finish, superior anodizing response, and excellent extrudability.

Compared to 6061, 6063 offers lower strength but significantly better surface quality and corrosion resistance, making it the preferred choice when aesthetics and environmental durability are critical. Shanghai Bozhong Metal Group supplies 6063 bars in multiple tempers and precision dimensions to meet diverse application demands.

Smooth, uniform surface ideal for anodizing and architectural finishing
Excellent corrosion resistance in atmospheric and marine environments
Superior extrudability for complex profiles and tight tolerances
Good thermal and electrical conductivity
Readily weldable by MIG and TIG processes
Heat-treatable to achieve targeted mechanical properties

Typical Applications

Architectural Frames

Window & door frames, curtain walls, handrail systems

Furniture Components

Table legs, chair frames, shelving, decorative trims

Heat Sinks

LED housings, electronic enclosures, thermal management

Irrigation Tubing

Agricultural piping, sprinkler systems, connectors

Automotive Trim

Interior moldings, decorative strips, roof rails

General Fabrication

Machined parts, brackets, fixtures, consumer goods

Common Specifications&Temper Comparison

Common Specifications

Standard dimensions and shapes available for immediate shipment

Shape	Diameter / Width (mm)	Length (mm)	Available Tempers	Surface Finish	Typical Pack Size
Round Bar	3 – 610	1000 – 6000	T4, T5, T6, T52, T66	Mill finish, Anodized, Polished	500 kg / bundle
Square Bar	6 × 6 – 150 × 150	1000 – 6000	T4, T5, T6	Mill finish, Anodized	500 kg / bundle
Flat Bar	10×3 – 200×50	1000 – 6000	T4, T5, T6	Mill finish, Anodized	500 kg / bundle
Hexagonal Bar	6 – 65 (across flats)	1000 – 6000	T4, T5, T6	Mill finish	300 kg / bundle

Custom dimensions available upon request. Non-standard lengths, tighter tolerances, and special surface treatments can be accommodated. Contact us with your specific requirements.

Temper Comparison

Mechanical properties across different tempers for 6063 aluminum

Property	T4 Solution Heat-Treated & Naturally Aged	T5 Cooled from Extrusion & Artificially Aged	T52 Stress-Relieved & Artificially Aged	T6 Solution Heat-Treated & Artificially Aged	T66 T6 with Enhanced Aging
Tensile Strength (MPa)	≥ 172	≥ 186	≥ 186	≥ 241	≥ 255
Yield Strength (MPa)	≥ 90	≥ 145	≥ 145	≥ 214	≥ 228
Elongation (%)	≥ 14	≥ 12	≥ 10	≥ 12	≥ 10
Hardness (HB)	~ 46	~ 60	~ 55	~ 73	~ 80
Surface Finish Quality	Very Good	Excellent	Very Good	Good	Good
Formability	Excellent	Good	Good	Fair	Fair
Corrosion Resistance	Excellent	Excellent	Excellent	Very Good	Very Good
Weldability	Excellent	Good	Good	Good	Good
Typical Application	Deep forming, bending, complex profiles	Architectural extrusions, window frames	Stress-critical components, precision parts	Structural members, load-bearing parts	High-strength architectural, transport

Values are minimum requirements per ASTM B221 / EN 755-2. T5 is the most widely used temper for architectural applications; T6 is preferred when higher strength is needed. T66 offers the best combination of strength and surface finish.

Chemical Composition&Physical Properties

Chemical Composition

Nominal alloy composition in compliance with ASTM B221 / EN 573-3

Element	Symbol	Composition (%)	Role in Alloy
Aluminum	Al	97.55 – 98.50	Base metal; provides lightweight structure and corrosion resistance
Magnesium	Mg	0.45 – 0.90	Primary strengthening element; forms Mg₂Si precipitates
Silicon	Si	0.20 – 0.60	Combines with Mg to form Mg₂Si; enhances extrudability
Iron	Fe	≤ 0.35	Controls grain size; excess reduces surface quality
Copper	Cu	≤ 0.10	Minor strength contribution; kept low for corrosion resistance
Manganese	Mn	≤ 0.10	Grain refiner; improves toughness
Chromium	Cr	≤ 0.10	Grain structure control; limits recrystallization
Zinc	Zn	≤ 0.10	Trace element; kept low for architectural applications
Titanium	Ti	≤ 0.10	Grain refiner during solidification
Others (each)	—	≤ 0.05	Trace impurities controlled for consistency
Others (total)	—	≤ 0.15	Total impurity cap per ASTM specifications

Physical Properties

Key physical characteristics of 6063 aluminum alloy

2.70 g/cm³

Density

615 – 655 °C

Melting Range

69 GPa

Elastic Modulus

23.4 μm/m·°C

Thermal Expansion (20-100 °C)

Property	Value	Unit	Reference Standard
Density	2.70	g/cm³	ASTM B221
Melting Range	615 – 655	°C	—
Elastic Modulus (Tension)	69.0	GPa	ASTM E111
Poisson's Ratio	0.33	—	—
Thermal Conductivity (T5)	201 – 209	W/m·K	ASTM E1225
Coefficient of Thermal Expansion (20-100 °C)	23.4	μm/m·°C	ASTM E228
Electrical Conductivity (T5, %IACS)	53 – 55	%IACS	ASTM B193
Electrical Resistivity (T5)	0.033	Ω·mm²/m	ASTM B193
Specific Heat Capacity	900	J/kg·K	—
Shear Modulus	25.8	GPa	—

packing

Packaging & Delivery

How we protect and ship your order

Standard Bundle

Steel-strapped wooden pallets with anti-moisture wrapping. Each bundle clearly labeled with alloy, temper, heat number, and dimensions. Typical bundle weight: 500 kg.

Export-Grade

Fumigated IPPC-compliant wooden crates with full VCI (Volatile Corrosion Inhibitor) paper wrap. Suitable for container sea freight worldwide.

Cut-to-Length

Precision cut to your specified lengths with chamfered or deburred ends. Individually wrapped where required. Minimizes your downstream processing time.

Keep in touch with us

If you have any questions or requirements regarding portable outdoor power solutions, please feel free to contact our customer service team. Our professional team will provide you with detailed product information, answer your questions, and tailor the best solution to meet your needs.

Mob：+86-138-1860-6660

E-mail：sales1@bznickelalloy.com