	US 11,866,811 B2
	Fe-based alloy
Hyo Yun Jung, Ulsan (KR); Kwang Su Choi, Daegu (KR); and Ji Yong Hwang, Daegu (KR)
Assigned to KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, Cheonan (KR)
Filed by KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, Cheonan (KR)
Filed on Dec. 1, 2021, as Appl. No. 17/540,135.
Claims priority of application No. 10-2021-0156515 (KR), filed on Nov. 15, 2021.
Prior Publication US 2023/0151465 A1, May 18, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C22C 38/10 (2006.01); C22C 38/04 (2006.01); C21D 9/50 (2006.01)

CPC C22C 38/105 (2013.01) [C21D 9/50 (2013.01); C22C 38/04 (2013.01); C21D 2211/001 (2013.01); C21D 2211/008 (2013.01)]

10 Claims

1. A Fe-based alloy containing: 15% to 20% by weight of nickel (Ni); 0.5% to 3% by weight of manganese (Mn); 2% to 8% by weight of cobalt (Co); and 0.1% to 0.5% by weight of carbon (C), the Fe-based alloy satisfying a condition of 18% by weight≤[Ni]+[Mn]<25% by weight, wherein [Ni] represents the weight content of nickel (Ni) and [Mn] represents the weight content of manganese (Mn),

wherein the Fe-based alloy has an austenite-martensite composite structure at room temperature, and is free from chromium (Cr), molybdenum (Mo), vanadium (V), and tungsten (W).