To radiate heat effectively, reduce the generation of thermal distortion and prevent the generation of heat cracks by providing the outer surface of a steel pipe joint with a linear hard facing of crest-root shape with required pitch.

An oil well steel pipe joint (a) and an excavating steel pipe (b) are jointed at a part (c) by pressure welding, and hard facing welding is applied to the whole circumferential surface in order to provide the steel pipe joint part (a) with wear resistance. In this case, a hard facing part (e) is formed into linear shape with crest-root shape such as thread shape, and the pitch of this hard facing part of thread shape is limited to a range of 7mm-30mm. With the hard facing part (e) thus formed in thread shape, only the crest parts wear in contact with an external wall protecting steel pipe, and heating caused by this wear is reduced because of the thread shape of the hard facing part (e). Heat radiation is also satisfactory so as to suppress the generation of thermal distortion to a minimum. As a result, the hard facing part (e) in the thread root parts is protected, and a heat crack generated to the thread crest part can be minute.