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Aluminium Tubes: Round, Square and Rectangular Hollow Sections

6063 alloy aluminium tubes, with 6061 available as custom extrusion, from our own extrusion plant and trusted partners in Bangalore. BIS/ISI certified. Anodised and powder coated. Wall thickness from 0.5 mm.

Round, square, and rectangular tube profiles
3 Profiles
Round, Square, Rectangular
BIS/ISI certified
BIS/ISI
IS 1285:2023 Certified
ISO 9001 and 14001 certified
ISO 9001 & 14001
TUV Certified
Years in aluminium
50+ Years
In Aluminium Since 1974
Aluminium tubes in round, square, and rectangular cross-sections showing wall thickness

Karnataka Metal Company extrudes aluminium tubes in round, square, and rectangular profiles at its own plant at Dabaspet, Bangalore, with square and rectangular profiles available from ready stock for immediate dispatch. For other standard profiles, see aluminium sections.

Types of Aluminium Tubes Available

Karnataka Metal Company extrudes and supplies aluminium tubes in round, square, rectangular, custom, and telescoping configurations.

Aluminium round tube profiles in various diameters

Round Tubes

Available in 7 mm to 85 mm OD in 6063-T5/T6 for handrails, furniture, and structural use. Round tubes and 6061 custom profiles are made to order only against a minimum order quantity.

Aluminium square tube profiles in various sizes

Square Tubes

Aluminium square tube profiles with flat mounting surfaces on all four sides, from 17 x 17 mm to 106 x 106 mm. Specified for furniture, signage supports, and lightweight structural frames.

Aluminium rectangular tube profiles for structural and framing applications

Rectangular Tubes

Aluminium rectangular tube profiles offer higher bending resistance along one axis for beams, rails, and frame members. Used for architectural framing, solar mounting rails, and conveyor supports.

Custom aluminium hollow section with internal chambers on a measuring machine at Karnataka Metal Company

Custom Hollow Sections

Custom aluminium hollow section shapes with internal chambers, fins, or asymmetric cross-sections; minimum wall thickness 0.7 mm. See aluminium profiles.

Aluminium telescoping tube assemblies showing nested round and square tubes

Telescoping Tubes

Two or more aluminium tubes of incrementally different sizes that slide within each other for adjustable-height applications. Used for extendable poles, tripod supports, and display structures. Telescoping tubes are not a standard catalogue item. Karnataka Metal Company can design and supply a custom telescoping profile to your specific requirement.

Aluminium Tube Specifications and Size Guide

Round Tube Size Range
Round aluminium tubes are produced to order in 6063 alloy from Karnataka Metal Company's standard die range below. Additional diameters and wall thicknesses are available on request; ask for the full standard profile catalogue.
Outside Diameter (mm)Wall Thickness (mm)Approx. Weight (kg/m)
71.00.051
325.01.145
351.40.400
35.87.01.710
387.01.841
442.00.712
854.43.001
Aluminium round tubes stacked showing wall thickness at the cut ends
Square and Rectangular Tube Size Range
The square and rectangular sizes below are held in ready stock in 6063 alloy, each available across the wall-thickness range shown. Weights are per running metre.
ProfileSize (mm)Wall Thickness (mm)Approx. Weight (kg/m)
Rectangular25 x 202.00.443
Rectangular38 x 250.5 to 2.50.180 to 0.783
Rectangular40 x 202.00.605
Rectangular50 x 250.6 to 3.00.246 to 1.230
Rectangular63 x 380.8 to 3.00.410 to 1.530
Rectangular75 x 251.5 to 3.00.785 to 1.522
Rectangular100 x 501.2 to 4.00.955 to 3.187
Rectangular101 x 441.2 to 3.00.929 to 2.295
Rectangular150 x 502.02.117
Square25 x 250.5 to 3.00.134 to 0.713
Square38 x 380.75 to 3.00.300 to 1.138
Square50 x 501.0 to 3.00.505 to 1.557
Square100 x 1003.03.142
This is the current ready-stock list and it shifts with demand. Beyond these, Karnataka Metal Company's standard profile catalogue covers square tubes from 17 to 106 mm and rectangular tubes from 20 x 10 mm up to 150 x 75 mm, all available made to order from existing dies. If a size is not listed, we can run a fresh lot from an existing die or cut a custom die. Contact us to confirm current stock and sizes.
Square and rectangular aluminium tubes stacked at the extrusion plant
Alloy and Mechanical Properties
Karnataka Metal Company stocks aluminium tubes in 6063 alloy and makes the full 6000 series to order as custom profiles against a minimum order quantity, with the alloy and temper matched to wall thickness and load requirements, including 6061 for structural and transport applications. For a detailed comparison of alloy properties, read the guide on 6063 vs 6061 aluminium. For details on temper designations, see the guide on aluminium tempers.
Property6063-T56063-T66061-T6
Ultimate tensile strength (min)150 MPa205 MPa260 MPa
Yield strength (min)110 MPa170 MPa240 MPa
Shear strength65 MPa95 MPa145 MPa
Elongation (min)8%8%8%
Brinell hardness65 HB75 HB95 HB
Density2.70 g/cm32.70 g/cm32.70 g/cm3
Corrosion resistanceExcellentExcellentGood
MachinabilityFairGoodSuperior
Typical useStandard architectural tubesHigher-strength tubesStructural, transport, automotive
Values are typical minimums per ASTM B221M, with Brinell hardness per EN 755-2 and shear strength per BS 8118. Properties may vary across standards and profile geometry.
6061-T6 aluminium tubes are 27% stronger than 6063-T6 in tensile strength and offer 53% greater shear strength, making them the preferred choice for load-bearing applications in transport, automotive, and structural engineering. For welded assemblies using 6061 tubes, 5356 filler wire is recommended for stronger joints, noting that 30 to 40% strength loss occurs in the heat-affected zone (HAZ).
Aluminium alloy billets marked by grade at the extrusion plant
Surface Finishes Available
All surface finishing is coordinated through Karnataka Metal Company as your single supplier.
FinishExecutionKey SpecsNotes
Mill finishAs extrudedNatural aluminium surfaceCost-effective, suitable for concealed applications
AnodisedQuality-tested providers8 colours, glossy and matt finishes, lifelong durabilityElectrochemical oxide layer for corrosion resistance
Powder coatedApproved partners (Jotun, Interpon)60 to 80 microns film thickness, 10 to 30 year warrantyWide colour range, weather-resistant
For applications requiring surface preparation before finishing, Karnataka Metal Company offers in-house shot blasting (SS316 shots, 8 tonnes/day capacity, profiles any length). We also offer mechanical finishes including hair line brush finish and matte buffing.
Standard lengths: 3.66 m (12 ft). Custom lengths available on request for project orders.
BIS Standard: IS 1285:2023 (Aluminium Alloy Extruded Round Tube and Hollow Sections for General Engineering Purposes).
Need help selecting the right tube size, alloy, or finish? Contact us at +91 80 2670 9928 or email sales@karnatakametal.com for technical guidance.
Anodised and powder coated aluminium profile finish samples in multiple colours

Aluminium Tube Applications

Aluminium tubes used in modern furniture frames and interior structures

Furniture and Interior Fit-out

Round and square aluminium tubes for table frames, chair structures, shelving systems, wardrobe rails, and modular furniture assemblies. Available in anodised and powder coated finishes for exposed furniture applications.

Aluminium round tube handrails installed on a staircase railing

Handrails, Railings and Balustrades

Round aluminium tubes are the standard profile for handrails, staircase railings, and balcony balustrade top rails with anodised finish for corrosion resistance. For glass balustrade systems, aluminium tube posts pair with toughened glass panels.

Aluminium square tubes used as signage support frames and retail display structures

Signage, Display and Retail

Lightweight aluminium tubes for signage supports, banner frames, exhibition stands, and retail display structures. Square and rectangular tubes provide flat mounting surfaces for panel attachment and cable routing.

Aluminium rectangular tubes used in solar panel mounting structures

Solar Mounting and Structural

Rectangular aluminium tubes for solar panel mounting rails, rooftop racking systems, ground-mount structures, and structural framing. Karnataka Metal Company also offers solar frame assemblies from the same Bangalore campus.

Aluminium tubes used in automotive components and industrial frameworks

Automotive, Transport and Industrial

Aluminium tubes for automotive components, bus body structures, scaffolding systems, conveyor supports, machine guards, and industrial frameworks at one-third the weight of steel. For bus body and automobile applications, see aluminium for bus body and automobile industry.

Stock Availability and Ordering

Standard aluminium tubes in popular square and rectangular sizes are available from ready stock at the Bangalore retail outlet for immediate pickup. Round tubes, 6061 profiles, and bulk or project quantities are made to order against a minimum order quantity, with consistent sizing and finish quality.

Industries We Supply
IndustryTube Types Supplied
Furniture and InteriorRound tubes for handrails and furniture frames, square tubes for shelving and display structures
Construction and ArchitectureTubes for railings, balustrades, curtain wall support systems, scaffolding
Solar and EnergyRectangular tubes for mounting rails and ground-mount racking structures
Industrial and TransportStructural tubes for machine guards, conveyor supports, automotive and bus body components
Signage and RetailSquare and rectangular tubes for signage frames, exhibition stands, retail fixtures
Aluminium tube and profile ready stock racks at Karnataka Metal Company, Bangalore
Our Clients

Trusted by Leading Organizations

By the Numbers

4,800 TPA
Extrusion Capacity
Pan-India
Delivery Across India
0.5 mm
Minimum Wall Thickness
In-House Quality Lab
Every Batch Tested Before Dispatch

Why Choose Karnataka Metal Company for Aluminium Tubes

Ready Stock in Bangalore

Standard aluminium tubes in popular sizes are available from ready stock at our A.M Road retail outlet. Walk-in buyers can purchase in single-piece quantities with no minimum order.

Own Extrusion Plant and Trusted Partners

Most aluminium tubes are extruded at our own 50,000 sq ft plant at Dabaspet, Bangalore, with a combined capacity of 4,800 TPA, in-house die shop, and in-house quality lab. Select profiles are also sourced from trusted extrusion partners to ensure the widest range of ready stock.

0.5 mm Minimum Wall Thickness

Thin-walled aluminium tubes from 0.5 mm wall thickness for lightweight furniture and telescoping assemblies, up to 10 mm and above for heavy structural applications.

Full 6000 Series Range

Aluminium tubes are stocked in 6063 alloy for architectural applications, while the full 6000 series is made to order as custom profiles against a minimum order quantity. The right alloy and temper depend on wall thickness and load requirements, including 6061-T6 for transport, automotive, and heavy-duty use. Read the guide on 6063 vs 6061 aluminium.

Tube to Finished Product

Buy aluminium tubes and get them cut, drilled, punched, bent, and assembled under one roof with aluminium machining and in-house shot blasting, with anodising and powder coating outsourced but fully managed. One purchase order, one delivery.

BIS/ISI and ISO 9001 & 14001 Certified

Aluminium tubes are extruded to IS 1285:2023 and BIS/ISI standards, audited by TUV under ISO 9001:2015 and ISO 14001:2015. Every tube carries a BIS Standard Mark per the Quality Control Order effective April 2025.

Get in Touch

Looking for aluminium tubes in Bangalore? Visit our retail outlet on A.M Road for walk-in purchases and same-day availability. For project orders and delivery across India, contact us for aluminium tube price and availability.

Bundled aluminium tubes in round, square and rectangular sections at the Karnataka Metal Company stockyard, Bangalore

Karnataka Metal Company

Retail Outlet16 and 17, A.M Road, Kalasipalya Extension, Bangalore 560002
Extrusion PlantDabaspet (Sompura Industrial Area), Bangalore
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Common Questions

Frequently Asked Questions

What is the price of aluminium tubes? +
Pricing is quoted per kilogram for all orders, bulk and retail alike. Aluminium is a traded commodity, so raw-material prices keep moving with the market and pricing is never fixed. Extrusion pricing is benchmarked to the current NALCO (National Aluminium Company, the Government of India's primary aluminium producer) ingot (grade IE07) or billet (grade CH10) price, with a conversion charge of typically 15 to 20% added on top for the extrusion work. Contact Karnataka Metal Company at +91 80 2670 9928 or email sales@karnatakametal.com for current aluminium tube price.
What is the difference between aluminium tubes and aluminium pipes? +
Aluminium tubes are specified by outside diameter (OD) and wall thickness; aluminium pipes by nominal bore (NB) and schedule. For extruded aluminium in India, tube is the more common term, following OD conventions per IS 1285:2023, which is how Karnataka Metal Company supplies them.
What aluminium alloy is best for tubes? +
It depends on the application. 6063-T5/T6 is standard for furniture, handrails, and architectural tubes, anodising to a smooth, even finish. 6061-T6 suits tubes that carry structural loads, resist fatigue, or are welded into assemblies. When unsure, start with 6063 and specify 6061 only where higher yield strength is required.
What sizes of aluminium tubes are available? +
Round tubes from 7 mm to 85 mm OD; square tubes from 17 x 17 mm to 106 x 106 mm; rectangular tubes from 20 x 10 mm up to 150 x 75 mm. Wall thickness from 0.5 mm to 10 mm+; standard lengths 3.66 m (12 ft). Custom sizes and lengths are available for project orders through dedicated extrusion runs.
Can aluminium tubes be anodised or powder coated? +
Yes, both are available. Anodising suits exposed furniture and handrails, since the oxide layer is integral to the metal and will not chip or peel. Powder coating is better for a specific RAL colour or a textured finish such as wood grain; a Jotun or Interpon marine-grade formulation gives the best outdoor durability, with a 10 to 30 year warranty depending on grade and environment. All finishing is handled in-house in Bangalore.
Do you supply aluminium tubes for solar panel mounting? +
Yes. Rectangular aluminium tubes in 6063 or 6005-T5/T6 are commonly used for solar panel mounting rails and racking structures. Solar panel frames themselves are hollow extruded profiles rather than tubes. Karnataka Metal Company supplies these as solar frame assemblies from the same Bangalore campus, including cutting, punching, and corner key assembly. See our aluminium machining services.
What is the minimum order quantity for aluminium tubes? +
For custom sizes or specific alloys that need to be produced, the minimum order is 250 to 300 kg.