High nitrogen steels (HNS) are a new class of high alloy martensitic, austenitic or duplex grades with up to 0.9 mass% of N in solid solution.
- They are applied e.g. to stainless tools and bearings, in chemical engineering and for high strength non-magnetic components.
Defence Metallurgical Research Laboratory (DMRL), Hyderabad, a premier research laboratory of Defence Research and Development Organization (DRDO) and Jindal Stainless (Hisar) Limited (JSHL) have signed the Licensing Agreement for Transfer of Technology of High Nitrogen Steel (HNS) for armour applications.
- HNS technology developed by DMRL and DRDO is a step forward towards Army’s quest for lighter and high performance armouring material compared to the currently used materials.
- HNS is not only tough but also has good strength.
- In addition to being non magnetic as well as corrosion resistant, the HNS cost is about 40 percent less compared to Rolled Homogenous Armour Steel (RHA).
- Very few countries in the world have developed this technology of HNS.
- This material has potential for a number of defence and civil applications like armouring, mine trawls, oil industries etc.
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