Wear-resistant member and mechanical device using same

A member using a Cr-based alloy material, wherein the Cr-based alloy material has an alloy composition consisting of:

• more than 40 mass % and 65 mass % or less of Cr;
• 15 mass % or more and 40 mass % or less of Ni;
• more than 10 mass % and 30 mass % or less of Fe;
• 5 mass % or more and 16 mass % or less of Nb;
• 0.1 mass % or more and 0.9 mass % or less of Ti;
• 0.6 mass % or more and 2.5 mass % or less of C;
• 2 mass % or less of Mn;
• 0.1 mass % or more and 5 mass % or less of Cu;
• 0.1 mass % or more and 1 mass % or less of Si;
• 0.02% or more and 0.3 mass % or less of Sn;
• 0.005 mass % or more and 0.05 mass % or less of Al;
• and
• 1 mass % or less of impurities, and
• wherein in the alloy composition, a content rate of the Ni is higher than a content rate of the Fe,
• a mass ratio C/Nb of the Nb and the C is 0.11 or more and 0.16 or less, and
• a mass ratio Ti/Nb of the Nb and the Ti is 0.0062 or more and 0.063 or less.