Patent ID: 11952649
Assignee: POSCO CO., LTD
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A high strength stainless steel comprising, in percent (%) by weight of the entire composition, C: 0.14 to 0.20%, Si: 0.8 to 1.0%, Mn: more than 0 and 0.5% or less, Cr: 15.0 to 17.0%, Ni: 4.0 to 5.0%, Mo: 0.6 to 0.8%, Cu: 0.5% or less, N: 0.05 to 0.11%, the remainder of iron (Fe) and other inevitable impurities, and
C+N: 0.25% or more and Md30 value represented by a following Equation (1) satisfies 40° C. or more

Md30(° C.)=551−462*(C+N)−9.2*Si−8.1*Mn−13.7*Cr−29*(Ni+Cu)−18.5*Mo  (1)

(Here, C, N, Si, Mn, Cr, Ni, Cu, Mo mean the content (% by weight) of each element).