ALLOY FOR STRAIN GAUGE AND STRAIN GAUGE

摘要

PROBLEM TO BE SOLVED: To provide an alloy for strain gauge capable of forming a strain gauge excellent in fatigue resistance and the strain gauge.SOLUTION: An alloy for strain gauge contains 13 mass% or less of Ni, 16 to 19 mass% of Cr, 2.5 mass% or less of Mo, 0.15 to 1.0 mass% of Si, 0.1 to 2.0 mass% of Mn and 0.02 to 0.15 mass% of C and the balance Fe with inevitable impurities and manufactured by rolling an iron-based alloy having the NiCr equivalent which is a sum of the Ni equivalent of the following formula (1) and the Cr equivalent of the following formula (2) of 20 to 60% with a rolling reduction of 20 to 60%. Ni equivalent=Ni%+30×C%+0.5×Mn% (1) Cr equivalent=Cr%+Mo%+1.5×Si% (2).SELECTED DRAWING: Figure 1