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Low Cycle Fatigue

HAYNES® 230® 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 1800°F (425 to 980°C). Samples were machined from plate. Tests were run with fully reversed strain (R=-1) at a frequency of 20 cpm (0.33 Hz).

230 - Low Cycle Fatigue Properties

Comparative Low Cycle Fatigue Properties

The graph below compares the low cycle fatigue lives of a number of alloys tested at 800°F (427°C) in both the as-received and 1400°F (760°C)/1000 hour pre-exposed condition. Samples were machined from plate or bar, after exposure for exposed samples. Tests were again run with fully reversed strain (R=-1) at a frequency of 20 cpm (0.33 Hz). TSR=Total Strain Range.

800°F (425°C) LCF Life for Various Alloys

230 - 800°F (425°C) LCF Life for Various Alloys

Compilation of axial LCF test results (R=-1, f=0.33 Hz)

Temperature Δεtot/% Ni, Cycles to Initiation Nf, Cycles to Failure
°F °C
800 427 1.50 2230 2398
1.00 8480 8742
0.80 14,918 16,575
0.65 45,127 46,523
0.55 103,910 115,456
1000 538 1.50 1329 1540
1.25 1974 2368
1.00 3330 4413
0.80 7864 8734
0.70 8423 9876
0.60 38,696 40,604
0.56 73,014 74,132
0.53 -- 200,005*
0.50 -- 201,190*
1200 649 1.25 1022 1257
1.00 1852 2254
0.80 3431 4248
0.60 8962 11,058
0.50 82,275 85,563
0.45 -- 200,002*
0.40 -- 200,005*
1400 760 0.80 1896 2218
0.40 20,519 21,564
0.40 43,915 45,279
0.30 -- 203,327*
1400 760 1.00 870 1097
1.00 827 990
0.70 3166 3622
0.50 8153 8490
0.40 51,285 57,819
0.40 68,451 75,470
0.38 95,165 96,844
0.37 91,879 97,612
0.35 -- 202,920*
0.30 -- 150,000*
1600 871 0.70 1279 1504
0.50 3939 4299
0.50 3176 3473
0.40 9712 10,837
0.40 9296 10,781
0.35 19,179 20,964
0.31 61,898 63,253
0.30 65,691 66,926
0.25 -- 200,770*
1800 982 0.60 818 1218
0.50 1506 2582
0.40 3520 4223
0.40 3070 4784
0.30 19,810 21,311
0.30 13,904 19,200
0.25 105,140 106,020
0.25 116,960 119,890

* Indicates a run-out.

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