PURPOSE: To produce a high Mn non-magnetic pin having high hardness and excellent in rust resistance and non-magnetic properties by subjecting a wire rod composed of a high Mn non-magnetic steel containing specific percentages of C, Mn, Cr, and Mo to heat treatment and performing wiredrawing and ageing heat treatment under respectively specified conditions.

CONSTITUTION: A wire rod composed of a high Mn non-magnetic steel having a composition containing, by weight, 0.05-0.4% C, >16-25% Mn, 14-20% Cr, and 0.1-4% Mo is heat-treated, wiredrawn at 60-75% reduction of area, and subjected to ageing heat treatment at least once at 500-600°C in the course between cutting and finish polishing. By this method, the high Mn non-magnetic pin having high hardness and excellent in tensile strength, toughness, rust resistance, and non-magnetic properties can be obtained.