ArcelorMittal has patented a hot rolled plate or forging of an austenitic steel resistant to relaxation cracking. The composition includes specific percentages of elements like C, Mn, Si, Cr, Ni, Mo, B, V, and N, ensuring high performance and durability in industrial applications. GlobalData’s report on ArcelorMittal gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on ArcelorMittal, Photovoltaic roof tiles was a key innovation area identified from patents. ArcelorMittal's grant share as of January 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
A recently granted patent (Publication Number: US11884997B2) discloses a hot rolled plate or forging of an austenitic steel designed to be non-susceptible to relaxation cracking. The composition of the steel includes specific percentages by weight of various elements such as carbon, manganese, silicon, chromium, nickel, molybdenum, boron, vanadium, and nitrogen, with the balance being iron and unavoidable impurities. The steel's unique composition ensures it remains resistant to stress relaxation cracking at temperatures ranging from 500 to 900°C, with an elongation higher than 30% at 750°C and a creep rupture lifetime exceeding 0.5×105 hours under 36MPa at the same temperature.
Moreover, the patent covers reactor vessels, forgings, or pipelines made from the hot rolled plate or forging as described in the claims. The steel's fully austenitic structure, thickness ranging from 5 to 100 mm, and Charpy V fracture energy greater than 100 Joules further enhance its mechanical properties and applicability in various industrial applications. Additionally, variations in the composition, such as the inclusion of specific percentages of chromium and nickel, provide options for tailoring the steel's characteristics to meet specific requirements, ensuring versatility and performance in demanding environments.
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