Calculate Embedded Emissions for Unwrought Aluminium (HS7601)

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Notes:
There may be a difference when calculating the price with respect to import volume, carbon price, and benchmark emissions, as the embedded formula may result in minor variations due to decimal rounding. Therefore, the actual value may vary.

CBAM is applicable to trade volumes starting from 50 metric tonnes. For trade volumes below 50 metric tonnes, CBAM does not apply.

Usage Procedure – How to use the CBAM Calculator Sheet

Enter or update values only in the INPUT
PARAMETERS section (Highlighted in blue) , including
the carbon price, benchmark emissions, CBAM
chargeable percentage (as per the phase-in year),
and imported quantity.

The system will automatically calculate the payable
emissions and the total CBAM cost (€) based on the
inputs provided.

Notes:
• Change any input value to automatically update CBAM cost.
• Formula used: Carbon price × payable emissions × quantity.
• Model aligned with CBAM supplier-side illustrative methodology.

29 MAY 2026 AL CIRCLE

Kolkata Metro completes aluminium third rail upgrade on Blue Line underground section

EDITED BY : STAFF EDITOR 2MINS READ

metro

Stock image for referential purposes only

Kolkata Metro Railway has completed the aluminium third rail upgrade across the underground section of its Blue Line, replacing the older steel-based traction system that had been in use for more than four decades.

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The upgrade is part of the metro’s broader infrastructure modernisation programme aimed at improving train frequency, operational efficiency and energy performance.

The underground stretch covered under the project includes sections from Noapara to Dum Dum and from Belgachia to Mahanayak Uttam Kumar station.

According to the metro authority, the earlier steel third rail system, manufactured by Steel Authority of India Limited, had been supplying power to metro trains since the early years of Kolkata Metro operations.

Also read: Kolkata Metro joins international standards, replaces 38-years old steel line with aluminium third rail

However, the system had gradually become less efficient with changing technology and increasing focus on energy-efficient infrastructure. The Ministry of Railways had earlier decided in 2012 that all new Kolkata Metro corridors would adopt aluminium third rail systems instead of steel.

Metro officials said aluminium offers significantly higher electrical conductivity compared to steel, which helps reduce voltage loss and improves energy efficiency. According to the statement, aluminium has electrical conductivity of around 38 million siemens per metre, compared to around 6 million siemens per metre for steel.

Officials said this would help trains accelerate faster and support the long-term goal of reducing train headway to around 150 seconds in future operations. The metro authority also noted that lower resistance in aluminium would reduce heat generation inside tunnels, helping lower the load on air-conditioning systems.

Apart from operational improvements, the project is also expected to bring environmental benefits. Kolkata Metro estimates that the aluminium third rail system could reduce carbon emissions by nearly 50,000 tonnes over its operational life.

The upgrade is also part of a wider plan to introduce advanced signalling systems and support higher-frequency metro services on India’s first metro corridor.

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