	US 12,031,202 B2
	High carbon martensitic stainless steel
Vijay Shrinivas, Bengaluru (IN); and Thillairajan Arumugam, Bengaluru (IN)
Assigned to STEER ENGINEERING PRIVATE LIMITED, Bengalura (IN)
Filed by STEER ENGINEERING PRIVATE LIMITED, Bengaluru (IN)
Filed on Jun. 6, 2023, as Appl. No. 18/330,241.
Claims priority of application No. 202241032514 (IN), filed on Jun. 7, 2022.
Prior Publication US 2023/0392240 A1, Dec. 7, 2023
Int. Cl. C22C 38/36 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C21D 7/13 (2006.01); C21D 8/00 (2006.01); C22C 33/04 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01)

CPC C22C 38/36 (2013.01) [C21D 1/18 (2013.01); C21D 6/002 (2013.01); C21D 7/13 (2013.01); C21D 8/005 (2013.01); C22C 33/04 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C21D 2211/008 (2013.01)]

11 Claims

1. A high carbon martensitic stainless steel comprising:

1.7 to 1.9% by weight C,

17 to 18% by weight Cr,

1.6 to 2.0% by weight Mo,

2.9 to 3.5% by weight V,

0.40 to 0.60% by weight Nb,

up to 0.07% by weight of W, and

Fe as a main constituent,

wherein the high carbon martensitic stainless steel has a microstructure comprising primary carbides in an amount of 15 to 30% by volume and secondary carbides in an amount less than 2% by volume.