Bus body aluminium sections and commercial vehicle extrusions in 6061-T6 and 6082-T6 alloys. Custom extruded at 4,800 TPA capacity by Karnataka Metal Company, Bangalore.
Karnataka Metal Company extrudes aluminium bus body sections and automobile profiles in 6061-T6 and 6082-T6 alloys at its Dabaspet plant in Bangalore, one-third the weight of steel for significant fuel and energy savings across vehicle fleets. For a detailed alloy comparison, read the guide on 6063 vs 6061 aluminium.
Karnataka Metal Company extrudes aluminium sections for bus bodies and commercial vehicles from a single plant in Bangalore.
Box sections, channels, and T-sections forming the structural skeleton of buses and coaches. 6061-T6 as standard; 6082-T6 for crash members and heavy-duty structural components.
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Flat panels, tongue-and-groove sections, and corrugated profiles for exterior side cladding on buses, coaches, and commercial vehicles. Can be extruded with integrated stiffening ribs for reduced thickness.
Frame rails, crash members, bumper beams, and structural profiles for automobile manufacturers in 6082-T6 and 6061-T6 alloys. Machining services available for finished automotive components.
| Alloy | Strength Class | Transport and Automobile Use |
|---|---|---|
| 6061-T6 | Medium (260 MPa UTS) | Primary bus body framework, chassis rails, structural members |
| 6082-T6 | Medium-High | Crash members, heavy-duty floor sections, automotive frame rails |
| 6005-T6 | Medium | Roof structures, secondary framing |
| 6063-T6 | Medium-Low | Window frames, trim profiles, non-structural vehicle sections |
| 6351-T6 | Medium-High | High-load structural profiles, heavy transport applications |
| Property | Aluminium (6061-T6) | Mild Steel (IS 2062) | Advantage |
|---|---|---|---|
| Density | 2.70 g/cm3 | 7.85 g/cm3 | Aluminium is 66% lighter |
| Strength-to-weight ratio | 115 kNm/kg | 52 kNm/kg | Aluminium is 2.2x better |
| Typical bus body weight | 2,500 to 3,500 kg | 4,000 to 5,500 kg | 30 to 40% weight saving |
| Corrosion resistance | Excellent (natural oxide layer) | Poor (requires painting) | Reduced maintenance cost |
| Recyclability | Fully recyclable, 95% energy saving | Recyclable | Greater energy saving on recycling |
| Finish | Application |
|---|---|
| Mill finish | Bus body framework sections (concealed within the structure) |
| Anodised | Exterior-visible sections, window frames, trim profiles |
| Powder coated | Exterior components requiring colour matching to vehicle livery |
| Standard | Scope |
|---|---|
| IS 733:1983 | Wrought aluminium sections |
| IS 1285:2023 | Extruded tubes and hollow sections |
| BIS QCO 2023 | Mandatory BIS Standard Mark on all aluminium extrusion products (effective April 2025) |
| Driver | Impact on Aluminium Demand |
|---|---|
| National Infrastructure Pipeline | Rs 111 lakh crore investment target includes mass transit systems |
| Urban Transport Modernisation | Smart Cities Mission and metro rail expansion across Indian cities |
| Rising Fuel Costs | Lighter vehicle bodies reduce fuel consumption across entire fleet operations |
| Corrosion and Maintenance | Aluminium bodies last longer with lower maintenance, especially in coastal cities |
| Reference | Details |
|---|---|
| Titagarh Rail Systems | Built India's first aluminium-bodied metro coaches for Pune Metro |
| ALEMAI | 225+ member companies, 2.1 million TPA combined extrusion capacity in India |
Seven alloys (6063, 6060, 6061, 6005, 6082, 6351, 6101B) with T4, T5, T6, and T66 tempers. 6061-T6 for framework, 6082-T6 for crash members, 6005-T6 for roof sections, and 6063-T6 for trim, all from one source.
Aluminium bus body and automobile sections extruded at our own 50,000 sq ft plant at Dabaspet, Bangalore. Two press lines (4-inch and 6/7-inch) with in-house die shop for project-specific section designs.
Complex hollow, semi-hollow, and solid sections with minimum wall thickness of 0.7 mm. Custom dies prepared in-house for structural, panel, and chassis profiles specific to each transport or automobile project.
Alloy composition is verified with a German spectrometer at the billet-casting stage, and every batch is checked with Japanese measurement instruments for dimensional precision. Transport applications demand consistent material properties; our lab ensures they are met.
From raw extrusion to finished component under one management: aluminium machining (cutting, drilling, punching, tapping, deburring) and in-house shot blasting. Sections supplied as raw profiles or as machined, ready-to-assemble components.
Extrusion processes audited by TUV under ISO 9001:2015 and ISO 14001:2015. Every aluminium section carries the BIS Standard Mark as required under the Quality Control Order effective April 2025.
We supply aluminium sections for bus body construction, automobile components, and transport applications to OEMs, bus body builders, and vehicle manufacturers across South India. Contact us with your cross-section drawings and alloy requirements.
