Patents by Inventor Amar Kumar De

Amar Kumar De has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240026480
    Abstract: A high strength low alloy steel sheet product produced by a continuous strip process. The sheet product comprises from 0.045 to 0.06 weight percent Carbon, from 0.75 to 1.2 weight percent Manganese, from 0.02 to 0.04 weight percent Aluminum, and from 0.075 to 0.12% weight percent Titanium and an Fe balance. The steel sheet product has been subjected to cold rolling and batch annealing to form a steel sheet product having a yield strength of at least 500 MPa, a substantially ferritic microstructure with nano TiC precipitates and a hole expansion ratio of at least 60%.
    Type: Application
    Filed: May 12, 2023
    Publication date: January 25, 2024
    Inventors: Amar Kumar De, Siddhartha Biswas, Shobhit Bhartiya, Bilin Chen, Venkata Sai Yashwanth Injeti
  • Patent number: 11352683
    Abstract: A lower carbon steel alloy with specific substitutional alloying additions. The alloy is useful in the production of ASTM A516 grade pressure vessel steel plates with excellent HIC resistance. The material has a ferrite-pearlite microstructure, in normalized and stress relieved condition, appropriate for resisting hydrogen induced cracking, with isolated ferrite and pearlite constituents and no continuous pearlite bands. The material exhibits significant low temperature toughness.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: June 7, 2022
    Assignee: AcelorMittal
    Inventor: Amar Kumar De
  • Publication number: 20220025496
    Abstract: A railroad tank car formed from steel alloy plates having improved toughness and puncture resistance. The steel alloy plates include a steel alloy including in wt. %: C: 0.1-0.15; Mn: 1.0-1.65; Si: 0.15-0.40; Al: 0.015-0.06; Mo: 0.1-0.3; Ni: 0.1-0.25; Nb: 0.015-0.045; Ti: up to 0.02; Cr: up to 0.22; V: up to 0.08; Cu: up to 0.35; P: max 0.025; S: max 0.015; and N: 0.004-0.01. The alloy plates may have been normalized for 30 minutes at 900° C. The alloy plates may have a tensile strength of at least 560 MPa; a yield strength of at least 345 MPa; a total elongation of at least 22%; a CVN impact toughness of at least 135.5J at ?34.4° C.; a CVN impact toughness of at least 122J at ?45.5° C. The alloy plates may have a ferrite-bainite microstructure, with 10% or less pearlite. The alloy plates of the inventive railroad tank car may have an absence of any banded ferrite-pearlite/martensite structure.
    Type: Application
    Filed: November 20, 2019
    Publication date: January 27, 2022
    Inventors: Tanya ROS YANEZ, Amar Kumar DE, Venkata Sai Ananth CHALLA, Sandeep ABOTULA
  • Patent number: 11060169
    Abstract: A high temperature oxidation resistant nickel-aluminide alloy composition and furnace rolls formed therefrom. The inventive nickel-aluminide alloy composition comprises 0.08-0.1 wt. % Zr, 2.5-3.0 wt. % Mo, 7.5-8.5 wt. % Al, 7.5-8.5 wt. % Cr, about 0.01 wt. % B and the balance being substantially nickel.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: July 13, 2021
    Assignee: ArcelorMital
    Inventors: Tanya Ros Yanez, Amar Kumar De
  • Publication number: 20200377979
    Abstract: A lower carbon steel alloy with specific substitutional alloying additions. The alloy is useful in the production of ASTM A516 grade pressure vessel steel plates with excellent HIC resistance. The material has a ferrite-pearlite microstructure, in normalized and stress relieved condition, appropriate for resisting hydrogen induced cracking, with isolated ferrite and pearlite constituents and no continuous pearlite bands. The material exhibits significant low temperature toughness.
    Type: Application
    Filed: August 18, 2020
    Publication date: December 3, 2020
    Inventor: Amar Kumar De
  • Patent number: 10829839
    Abstract: A lower carbon steel alloy with specific substitutional alloying additions. The alloy is useful in the production of ASTM A516 grade pressure vessel steel plates with excellent HIC resistance. The material has a ferrite-pearlite microstructure, in normalized and stress relieved condition, appropriate for resisting hydrogen induced cracking, with isolated ferrite and pearlite constituents and no continuous pearlite bands. The material exhibits significant low temperature toughness.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: November 10, 2020
    Assignee: ArcelorMittal
    Inventor: Amar Kumar De
  • Publication number: 20160333447
    Abstract: A lower carbon steel alloy with specific substitutional alloying additions. The alloy is useful in the production of ASTM A516 grade pressure vessel steel plates with excellent HIC resistance. The material has a ferrite-pearlite microstructure, in normalized and stress relieved condition, appropriate for resisting hydrogen induced cracking, with isolated ferrite and pearlite constituents and no continuous pearlite bands. The material exhibits significant low temperature toughness.
    Type: Application
    Filed: February 5, 2015
    Publication date: November 17, 2016
    Inventor: Amar Kumar De
  • Publication number: 20160230258
    Abstract: A lower carbon steel alloy with specific substitutional alloying additions. The alloy is useful in the production of ASTM A516 grade pressure vessel steel plates with excellent HIC resistance. The material has a ferrite-pearlite microstructure, in normalized and stress relieved condition, appropriate for resisting hydrogen induced cracking, with isolated ferrite and pearlite constituents and no continuous pearlite bands. The material exhibits significant low temperature toughness.
    Type: Application
    Filed: February 5, 2015
    Publication date: August 11, 2016
    Inventor: Amar Kumar De