FE-MN-SI-BASED ALLOY CASTING MATERIAL HAVING EXCELLENT LOW-CYCLE FATIGUE PROPERTIES

摘要

The present invention provides a novel Fe-Mn-Si-based alloy casting material which is useful as a construction material and the like and has excellent low-cycle fatigue properties. According to one embodiment of the present invention, the Fe-Mn-Si-based alloy casting material is characterized by containing Mn and Si as essential component elements and containing at least one among Cr, Ni, Al, and C as optional component elements, the composition of the alloy casting material being 5 mass% ≤ Mn ≤ 35 mass%, 1.5 mass% ≤ Si ≤ 6.5 mass%, 0 mass% ≤ Cr ≤ 15 mass%, 0 mass% ≤ Ni≤ 15 mass%, 0 mass% ≤ Al ≤ 3 mass%, and 0 mass% ≤ C ≤ 0.4 mass%, with the remainder comprising Fe and unavoidable impurities, wherein the conditions of formula (A), 37[%Mn]+0.3[%Si]+0.7[%Cr]+2.4[%Ni]+5.2[%Al]+28[%C]45, and formula (B), [%Ni]+30[%C]+0.5[%Mn]0.75[%Cr]+1.125[%Si]+2[%Al] are satisfied.