Stainless steel pipe and method for manufacturing same

A stainless steel pipe of a composition that comprises, in mass %, C:

• 0.005 to 0.08%, Si:
• 0.01 to 1.0%, Mn:
• 0.01 to 10.0%, Cr:
• 20 to 35%, Ni:
• 1.0 to 15%, Mo:
• 0.5 to 6.0%, and N:
• 0.005% or more and 0.147% or less, and in which the balance is Fe and incidental impurities,
• the stainless steel pipe having an axial tensile yield strength of 689 MPa or more, an axial compressive yield strength/axial tensile yield strength ratio of 0.85 to 1.15, and a microstructure that is 20 to 80% ferrite phase by volume with the remainder containing an austenite phase,
• the stainless steel pipe having pipe end portions at least one of which has a fastening portion for an external thread or an internal thread, and having a curvature radius of 0.2 mm or more for a corner R formed by a bottom surface of a thread root and a pressure-side flank surface of the thread, measured in an axial plane section of the fastening portion.