NICKEL-CONTAINING STEEL PLATE
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United States of America Patent
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Jul 22, 2021
app pub date -
Dec 27, 2018
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Dec 27, 2018
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Abstract
A nickel-containing steel plate according to an aspect of the present invention has a chemical composition within a predetermined range, in which an average coarse grain size of prior austenite which is defined as a simple average value of maximum values of equivalent circle diameters of prior austenite grains in each of ten visual fields having an area of 200 μm2, measured at a ¼t position of the steel plate in a section formed by a rolling direction of the steel plate and a thickness direction of the steel plate is 20 μm or less, and a tensile strength is 690 MPa to 900 MPa.
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