MUMBAI, India, Aug. 12 -- Intellectual Property India has published a patent application (202531009844 A) filed by Tata Steel Limited on February 06, 2025, for High Strength Line Pipe Steel Having Enhanced Hydrogen Resistance And Method Of Manufacturing Thereof.
Inventors include Prashant Pathak; Bhagyaraj Jayabalan; Monojit Dutta; and Rahul Kumar Verma.
The application for the patent was published on August 07, 2026, under issue no. 32/2026.
Abstract: ABSTRACT Title : HIGH STRENGTH LINE PIPE STEEL HAVING ENHANCED HYDROGEN RESISTANCE AND METHOD OF MANUFACTURING THEREOF The present disclosure relates to a steel composition comprising Carbon (C) at 0.02% to 0.06%, Manganese (Mn) at 0.6% to 1.30 %, Niobium (Nb) at 0.05 % to 0.10%, Molybdenum (Mo) at 0.10% to 0.20, Titanium (Ti) at 0.015% to 0.025%, Aluminium (Al) at 0.03% to 0.05%, Silicon (Si) at 0.1% to 0.5%, Nickel (Ni) at 0.1% to 0.3%, Nitrogen (N) at 0.0001% to 0.0060%, Hydrogen (H) at a concentration ranging up to 0.0002 wt.%, Sulphur (S) at 0.0001% to 0.0020%, Phosphorus (P) at 0.0001% to 0.015%; and the balance being Fe. The developed steel of the present disclosure exhibits enhanced tensile properties in accordance with API 5L PSL-2 specification for X65/X-70 grade steel, along with superior hydrogen induced cracking resistance. The developed steel welded to form line pipe tubes used for the transportation of natural gas or crude oil, especially of sour grade.
Disclaimer: Curated by HT Syndication.
