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Low Cycle Fatigue

HAYNES® 244® alloy exhibits excellent low cycle fatigue properties at elevated temperature. Results shown below are for strain-controlled tests run in the temperature range from 800 to 1400°F (425 to 760°C). Samples were machined from plate. Tests were run with fully reversed strain (R=-1) at a frequency of 20 cpm (0.33 Hz).

244 LCF figure

Temperature Δεtot/% Ni, Cycles to Initiation Nf, Cycles to Failure
°F °C
800 427 1.25 3,949 4,461
1.00 6,398 7,889
0.80 12,380 14,820
0.70 16,159 18,881
0.65 36,244 41,256
0.60 39,419 40,506
0.55 145,998 160,614
0.50 N/A 200,826*
1000 538 1.25 2,753 2,835
1.00 5,520 7,006
0.80 9,859 12,877
0.80 10,058 11,169
0.70 16,291 17,989
0.70 23,438 24,443
0.60 82,871 87,701
0.55 N/A 201,022*
1200 649 1.23 897 983
1.00 3,644 3,686
0.80 8,980 9,422
0.75 12,370 13,066
0.70 30,898 31,078
0.60 249,079 249,284
1400 760 1.00 1,460 1,625
0.80 3,634 3,842
0.60 16,495 16,858
0.50 73,906 78,024
0.45 251,579 255,801
0.40 N/A 305,391*

*Discontinued

244 camparative LCF


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