Koninklijke KPN has been granted a patent for 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-quality performance in various applications. GlobalData’s report on Koninklijke KPN 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 Koninklijke KPN, Low latency interactive streaming was a key innovation area identified from patents. Koninklijke KPN's grant share as of January 2024 was 54%. 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 that is 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 is designed to exhibit high elongation at elevated temperatures, resistance to stress relaxation cracking within a specific temperature range, and a creep rupture lifetime exceeding a certain threshold under defined conditions.
Furthermore, the patent covers reactor vessels, forgings, or pipelines made using the hot rolled plate or forging as described in the claims. The steel composition specified in the patent aims to achieve a fully austenitic structure with a Charpy V fracture energy greater than 100 Joules. The thickness of the hot rolled plate is also defined within a range, and variations in the chromium content are detailed in different claims. The patent emphasizes the steel's ability to resist stress relaxation cracking at elevated temperatures, ensuring mechanical properties that meet stringent performance criteria for applications in demanding environments.
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