| 简介 |
Provided is an NiCrFe alloy which has excellent creep strength and stress relaxation cracking resistance. This NiCrFe alloy contains, in mass%, C in the amount of 0.03-0.15%, Si in the amount of 1.00% or less, Mn in the amount of 2.00% or less, P in the amount of 0.040% or less, S in the amount of 0.0050% or less, Cr in the amount of 18.0-25.0%, Ni in the amount of 25.0-40.0%, Ti in the amount of 0.10-1.60%, Al in the amount of 0.05-1.00%, N in the amount of 0.020% or less, O in the amount of 0.008% or less, and rare earth elements (REM) in the amount of 0.001-0.100%, with Fe and impurities constituting the remainder. In addition, the alloy satisfies formulas (1)-(3). (1) : 0.50≤Ti+48Al/27≤2.20 (2) : 0.40≤Ti/(Ti+48Al/27)≤0.80 (3) : Σ[REM/(A(REM))]-S/32-2/3·O/16≥0 The symbols for the elements in the formulas are substituted with the content (mass%) of the corresponding element, and A(REM) in formula (3) is substituted with the atomic weight of the rare earth elements. |
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