Title:
STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2024/071422
Kind Code:
A1
Abstract:
This steel plate has a given chemical composition and has an α value of 1.00-1.50 mass%, a β value of 10.0-15.0, a γ value of 0.70-1.50 mass%, a Ceq value of 0.550-0.620 mass%, a yield strength of 670-870 N/mm2, a tensile strength of 780-940 N/mm2, and a Charpy absorption energy at -65°C of 100 J or greater. When the steel plate is examined for hardness distribution at a pitch of 0.05 mm with respect to 121 portions of 1 mm × 1 mm located at 1/4 the plate thickness, the average hardness is 265-290 Hv and the standard deviation is 20 or less. The steel plate has a thickness of 10-60 mm.
Inventors:
YOSHIMURA NOBUYUKI (JP)
SHIRAISHI RYOTARO (JP)
HONMA RYUICHI (JP)
TAKAMINE FUMITOSHI (JP)
WAKAMATSU HIRONORI (JP)
OKUBO TAKESHI (JP)
SHIRAISHI RYOTARO (JP)
HONMA RYUICHI (JP)
TAKAMINE FUMITOSHI (JP)
WAKAMATSU HIRONORI (JP)
OKUBO TAKESHI (JP)
Application Number:
PCT/JP2023/035791
Publication Date:
April 04, 2024
Filing Date:
September 29, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21B3/00; B21B1/38; C21C1/02; C21D8/02; C22C38/00; C22C38/54
Domestic Patent References:
| WO2018020972A1 | 2018-02-01 |
Foreign References:
| JP2015196891A | 2015-11-09 | |||
| JP2015127444A | 2015-07-09 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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