Nucor has patented a hot rolled, ultra-high strength steel sheet with improved formability and various properties without boron. The composition includes specific elements and a multi-phase microstructure, enhancing structural performance and durability during stamping or forming processes. GlobalData’s report on Nucor 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 Nucor, Structure Building Framework was a key innovation area identified from patents. Nucor's grant share as of May 2024 was 47%. Grant share is based on the ratio of number of grants to total number of patents.
Ultra-high strength steel sheet for stamping/forming process
A recently granted patent (Publication Number: US11965230B2) discloses a hot rolled, complex metallographic structured steel sheet with specific composition and microstructure requirements. The steel sheet must contain carbon ranging from 0.02% to 0.2%, manganese from 1.0% to 3.5%, and other elements within defined limits. The multi-phase microstructure after hot rolling should consist of bainite, martensite+austenite (M+A) constituent, tempered and non-tempered martensite, and ferrite in specific volume percentages. Additionally, the steel sheet may include chemical elements like molybdenum, chromium, nickel, titanium, or niobium within specified ranges to enhance its properties.
Furthermore, the patented steel sheet must exhibit physical properties such as tensile strength exceeding 1000 megapascals, elongation greater than 10% as per ASTM E8 standards, and a yield strength/tensile strength ratio above 65%. The microstructure should ideally have specific volume percentages of bainite and martensite+austenite (M+A) constituent to meet the patent's requirements. The inclusion of precipitates like TiC, NbC, TiN, or NbN is also mentioned in the claims to improve the steel sheet's characteristics. Overall, the patent outlines a detailed composition and microstructure criteria for a high-strength steel sheet suitable for various industrial applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
