SSAB has been granted a patent for a hot-rolled strip steel product characterized by a specific chemical composition and microstructure. The product features over 90% ferrite, including at least 50% polygonal ferrite, and demonstrates high mechanical properties with a yield strength of at least 660 MPa and tensile strength of at least 760 MPa. GlobalData’s report on SSAB 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 SSAB, Gas pipeline network monitoring was a key innovation area identified from patents. SSAB's grant share as of June 2024 was 60%. Grant share is based on the ratio of number of grants to total number of patents.
Hot-rolled strip steel product with specific chemical composition
The patent US12024753B2 describes a hot-rolled strip steel product characterized by a specific chemical composition and microstructure. The steel product contains weight percentages of various elements, including carbon (C) ranging from 0.030% to 0.10%, silicon (Si) up to 1.10%, manganese (Mn) between 0.50% and 2.0%, and other alloying elements such as chromium (Cr), nickel (Ni), and vanadium (V). The microstructure of the steel product is predominantly ferritic, with at least 90% ferrite, which includes less than 10% bainite and a significant proportion of polygonal ferrite. The product exhibits mechanical properties such as a yield strength of at least 660 MPa and a tensile strength of at least 760 MPa, with an average hole expansion ratio of 50% or more.
Additionally, the patent outlines a method for manufacturing this steel strip, which involves several steps starting from providing a steel slab with the specified chemical composition. The process includes heating the slab to an austenitizing temperature, hot-rolling it to achieve the desired thickness, and then subjecting it to a controlled cooling process. This cooling consists of an initial air cooling followed by accelerated cooling, ensuring that the cooling rate is significantly higher during the latter phase. The method aims to produce a steel strip that meets the defined mechanical properties and microstructural characteristics, with potential variations in composition and processing parameters to enhance specific attributes such as ferrite grain size and strength.
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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.
