# US 2024/0200178 A1 · Steel, steel structural part, electronic device, and steel structural part preparation method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200178 A1 - Document ID: US20240200178A1 - Status: Published application - Kind: A1 - Application number: 18/587,723 - Filed: 2024-02-26 - Published: 2024-06-20 - Earliest claimed: 2021-08-27 - Applicants: Huawei Technologies Co., Ltd. - Inventors: Xiaoming XU; Ming CAI; Longyu LI - Web page: https://patentgrep.com/patent/US20240200178A1 ## CPC - C21D 9/28: for plain shafts - C22C 38/52: with cobalt - B22F 3/225: {by injection molding} - C22C 33/0207: {Using a mixture of pre-alloyed powders or a master alloy} - C22C 33/0285: {with Cr, Co, or Ni having a minimum content higher than 5%} - C22C 38/02: containing silicon - C22C 38/04: containing manganese - C22C 38/44: with molybdenum or tungsten - C22C 38/48: with niobium or tantalum - C22C 38/54: with boron - H04M 1/0214: {Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position (combined with translation movement H04M1/0235)} - C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B) - C22C: ALLOYS (treatment of alloys C21D, C22F) - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract The present disclosure relates to a steel, a steel structural part, an electronic device, and a steel structural part preparation method. An example steel includes Fe with a weight percentage of ≥60.67 wt %, Cr with a weight percentage of 8.01 wt % to 8.99 wt %, Ni with a weight percentage of 6 wt % to 7 wt %, Co with a weight percentage of 15.01 wt % to 15.99 wt %, Mo with a weight percentage of 5.5 wt % to 6.5 wt %, Nb with a weight percentage of ≤0.5 wt %, O with a weight percentage of ≤0.3 wt %, and C with a weight percentage of ≤0.05 wt %. ## Claims ### Claim 1 A steel, comprising: Fe, wherein a weight percentage of Fe in the steel is ≥60.67 wt %; Cr, wherein a weight percentage of Cr in the steel is 8.01 wt % to 8.99 wt %; Ni, wherein a weight percentage of Ni in the steel is 6 wt % to 7 wt %; Co, wherein a weight percentage of Co in the steel is 15.01 wt % to 15.99 wt %; Mo, wherein a weight percentage of Mo in the steel is 5.5 wt % to 6.5 wt %; Nb, wherein a weight percentage of Nb in the steel is ≤0.5 wt %; O, wherein a weight percentage of O in the steel is ≤0.3 wt %; and C, wherein a weight percentage of C in the steel is ≤0.05 wt %. ### Claim 2 (depends on 1) The steel according to claim 1, wherein the steel further comprises Si, and a weight percentage of Si in the steel is ≤0.5 wt %. ### Claim 3 (depends on 1) The steel according to claim 1, wherein the steel further comprises Mn, and a weight percentage of Mn in the steel is ≤0.5 wt %. ### Claim 4 (depends on 1) The steel according to claim 1, wherein the steel further comprises B, and a weight percentage of B in the steel is ≤0.05 wt %. ### Claim 5 (depends on 1) The steel according to claim 1, wherein a weight percentage of Cr in the steel is 8.2 wt % to 8.8 wt %. ### Claim 6 (depends on 1) The steel according to claim 1, wherein a weight percentage of Ni in the steel is 6.2 wt % to 6.8 wt %. ### Claim 7 (depends on 1) The steel according to claim 1, wherein a weight percentage of Co in the steel is 15.2 wt % to 15.8 wt %. ### Claim 8 (depends on 1) The steel according to claim 1, wherein a weight percentage of Mo in the steel is 5.7 wt % to 6.3 wt %. ### Claim 9 (depends on 1) The steel according to claim 1, wherein a weight percentage of Nb in the steel is 0.25 wt % to 0.45 wt %. ### Claim 10 (depends on 1) The steel according to claim 1, wherein a weight percentage of O in the steel is 0.01 wt % to 0.2 wt %. ### Claim 11 (depends on 1) The steel according to claim 1, wherein a weight percentage of C in the steel is 0.01 wt % to 0.035 wt %. ### Claim 12 (depends on 1) The steel according to claim 1, wherein the steel further comprises another element, wherein the another element comprises one or more of nitrogen, rhenium, copper, aluminum, titanium, sulfur, phosphorus, hydrogen, zirconium, magnesium, tantalum, calcium, vanadium, zinc, and rare earth metal, and wherein a mass percentage of the another element in the steel is ≤1%. ### Claim 13 An electronic device, comprising a steel structural part, wherein a material used by the steel structural part comprises a steel, the steel comprising: Fe, wherein a weight percentage of Fe in the steel is ≥60.67 wt %; Cr, wherein a weight percentage of Cr in the steel is 8.01 wt % to 8.99 wt %; Ni, wherein a weight percentage of Ni in the steel is 6 wt % to 7 wt %; Co, wherein a weight percentage of Co in the steel is 15.01 wt % to 15.99 wt %; Mo, wherein a weight percentage of Mo in the steel is 5.5 wt % to 6.5 wt %; Nb, wherein a weight percentage of Nb in the steel is ≤0.5 wt %; O, wherein a weight percentage of O in the steel is ≤0.3 wt %; and C, wherein a weight percentage of C in the steel is ≤0.05 wt %. ### Claim 14 (depends on 13) The electronic device according to claim 13, wherein the steel further comprises Si, and a weight percentage of Si in the steel is ≤0.5 wt %. ### Claim 15 (depends on 13) The electronic device according to claim 13, wherein the steel further comprises Mn, and a weight percentage of Mn in the steel is ≤0.5 wt %. ### Claim 16 (depends on 13) The electronic device according to claim 13, wherein the steel further comprises B, and a weight percentage of B in the steel is ≤0.05 wt %. ### Claim 17 (depends on 13) The electronic device according to claim 13, wherein a weight percentage of Cr in the steel is 8.2 wt % to 8.8 wt %. ### Claim 18 (depends on 13) The electronic device according to claim 13, wherein a weight percentage of Ni in the steel is 6.2 wt % to 6.8 wt %. ### Claim 19 (depends on 13) The electronic device according to claim 13, wherein a weight percentage of Co in the steel is 15.2 wt % to 15.8 wt %. ### Claim 20 (depends on 13) The electronic device according to claim 13, wherein a weight percentage of Mo in the steel is 5.7 wt % to 6.3 wt %.