[en] Single crystals of the commercial nickel-base superalloy NIMONIC 105 with four different orientations have been compression tested in the temperature range 600-1150 K. NIMONIC 105 is strengthened by fine, coherent, shearable, homogeneously distributed precipitates of the L1₂-long-range ordered γ'-phase (47 vol.%). The same investigations were undertaken for single crystals of the two constituent phases: L1₂-ordered, intermetallic single-phase γ' and disordered single-phase f.c.c. γ-matrix. Their compositions were those of the two equilibrium phases of NIMONIC 105. The CRSS of NIMONIC 105 and of the γ'-phase were anisotropic in the whole temperature range. The CRSS of the γ-matrix was isotropic. The interpretation of the anisotropy of NIMONIC 105 follows that of single-phase L1₂-ordered γ'. (orig.)