In this work, the feasibility of a novel processing route for high-nitrogen content austenitic steels is explored. Feedstock for powder injection moulding was prepared with gas atomized P558 stainless steel powder and binder containing a natural polymer as backbone polymer. Binders consisting of 45 wt% P(3HB-co-3HV) processed by bacterial fermentation, 45 wt% paraffin wax and 10 wt% stearic acid were employed. The solids loading was 60 vol.%. Tensile test specimens were injection moulded and subsequently subjected to solvent debinding in heptane, thermal debinding at 500°C and sintering at 1270°C under nitrogen. The microstructure was characterized by metallographic observation and X-ray diffraction. Yield stress values of 600 MPa, ultimate tensile strength of 900 MPa and elongation of 25% were achieved.