[ Nickel ]
[ Nickel ]
Full speed ahead : Nickel in India ’ s rapidly expanding rail networks
From metro to mainline , Indian Railways ( IR ) is one of the world ’ s largest rail networks under a single administration , handling over 22 million passengers and approximately 3.5 million tonnes of freight daily . It is recognised as one of the world ’ s largest commercial employers , with over 1.6 million employees . To keep up with the pace of change from population growth , urbanisation , and industrialisation , the Indian rail sector is undergoing rapid development , aiming to create a faster , more efficient , and expansive network . The ambitious future of India ’ s rail infrastructure requires prudent investments that ensure its long-term viability . This is where nickel-containing steels play a vital role .
By Richard Matheson , Director , Market Development , Nickel Institute
The modernisation of India ’ s rail system , both metro and mainline , encompasses various aspects . These include increasing the speed of both freight and passenger systems , electrifying the entire network , and rapidly expanding rail lines within and between cities . Such a monumental shift necessitates the adoption of innovative train technologies and the development of stations and platforms on an unprecedented scale .
Metros multiplying in major cities First opened in Delhi in 2002 , metro rail systems have become a common sight in almost all major Indian cities , either operational or in various stages of construction . These metro systems rely extensively on unpainted austenitic stainless steels , with nearly 100 % of metro coach shells made from nickel-containing steels . These materials that offer lightweight , high-strength construction with exceptional durability and resilience . Each metro coach incorporates approximately 8 tonnes of Type 301LN ( UNS S30153 ) stainless steel , exhibiting cold-worked yield strength levels ranging from 345 to 690 MPa ( 50 to 100 ksi ). The benefits include reduced weight , enhanced energy efficiency , elimination of painting requirements , and significantly decreased maintenance needs . Already , more than 3,000 metro
www . stainless-steel-world . net Stainless Steel World December 2023 37