PURPOSE: To provide superior resistance to hydrogen sulfide stress corrosion cracking as well as prescribed hardness and yield strength to a martensitic stainless steel by subjecting the low C-Cr-Ni stainless steel having a specified composition to heat treatment including subzero treatment.

CONSTITUTION: A steel contg. ≤0.02% C, 0.1W0.9% Si, 0.1W0.9% Mn, 3W7% Ni, 14.5W17.5% Cr and 0.005W0.05% Al besides ≤0.015% P, ≤0.015% S, ≤0.03% Cu, ≤0.03% Mo, ≤0.03% V and ≤0.015% N as inevitable elements is refined and refined and subjected to heat treatment including subzero treatment with liq. nitrogen or the like to form a metallic structure contg. fine δ-ferrite dispersed in the tempered martensite matrix. Thus, a stainless steel having resistance to hydrogen sulfide, ≤22 Rockwell C hardness and 55W63.3kgf/mm2 offset yield stress strength at 0.2% permanent set and suitable for use as the material of machine parts, etc. can be obtd.