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Creep and Stress-Rupture Strengths

Minimum Creep Rate, HASTELLOY® X Sheet, Solution-Annealed

Test Temperature Average Stress for Indicated Percent/Hour Minimum Creep Rate 
0.0001 0.001 0.01 0.1
°F °C ksi MPa ksi MPa ksi MPa ksi MPa
1200 649 14.7 101 21.0 145 31.0 214 44.0 303
1400 760 7.2 50 10.0 69 14.0 97 19.5 134
1600 871 2.7 19 4.1 28 6.2 43 9.2 63
1800 982 0.7 5 1.3 9 2.2 15 3.7 26
2000 1093 - - - - - - 0.9 6

HASTELLOY® X Plate, Solution-annealed

Temperature Creep Approximate Initial Stress to Produce Specified Creep in
10 h 100 h 1,000 h 10,000 h
°F °C % ksi MPa ksi MPa ksi MPa ksi MPa
1200 649 0.5 - - 27.2 188 19 128 12.8 88
1 - - 30 207 21 145 15.5 107
R 65* 448* 50 345 36 248 26 179
1300 704 0.5 25 172 16.2 112 11.1 77 8.2 57
1 27 186 19 131 14 97 10.5 72
R 46 317 32 221 23 159 17 117
1400 760 0.5 15 103 10.3 71 7.5 52 5.6 39
1 18 124 13 90 9.5 66 7.1 49
R 30 207 21 146 15.5 107 11.5 79
1500 816 0.5 9.9 68 7.2 50 5.3 37 3.85 27
1 12.5 86 9.1 63 6.7 46 4.7 32
R 21 141 15 103 10.5 72 7.2 50
1600 871 0.5 7.0 48 5.1 35 3.7 26 2.4 17
1 8.9 61 6.4 44 4.5 31 2.9 20
R 15 100 10.0 69 6.8 47 4.5 31
1700 927 0.5 5.1 35 3.6 25 2.3 16 1.3 9.0
1 6.4 44 4.4 30 2.7 19 1.5 10
R 10.0 69 6.6 46 4.3 30 2.6 18
1800 982 0.5 3.6 25 2.3 16 1.25 8.6 0.55 3.8
1 4.4 30 2.7 19 1.45 10 0.65 4.5
R 6.7 46 4.3 30 2.6 18 1.4 10
1900 1038 0.5 2.4 16 1.3 9.0 0.55 3.8 - -
1 2.8 19 1.5 10 0.65 4.5 - -
R 4.3 30 2.6 18 1.4 10 - -
2000 1093 0.5 1.4 10 0.60 4.1 0.15* 1.0* - -
1 1.6 11 0.70 4.8 0.20* 1.4* - -
R 2.7 19 1.4 10 0.60* 4.1* - -

*Significant extrapolation

HASTELLOY® X Sheet, Solution-annealed

Temperature Creep Approximate Initial Stress to Produce Specified Creep in
10 h 100 h 1,000 h 10,000 h
°F °C % ksi MPa ksi MPa ksi MPa ksi MPa
1200 649 0.5 - - 26 178 18 124 - -
1 - - 28 193 21 145 - -
R 66* 455* 48 331 35 241 26 179
1300 704 0.5 23.5 162 16 112 12 83 - -
1 26 179 19 131 14 97 - -
R 44 303 32 221 23 159 17 117
1400 760 0.5 15 103 11 76 8.1 56 - -
1 18 124 13 90 9.5 66 7.1 49
R 30 207 21 146 16 107 11.5 79
1500 816 0.5 10.5 72 7.7 53 5.4 37 - -
1 12.5 86 9.1 63 6.5 45 4.3 30
R 21 141 15 103 11 72 7.2 50
1600 871 0.5 7.5 52 5.1 35 3.2 22 - -
1 8.9 61 6.2 43 3.9 27 2.3 16
R 15 100 10 69 6.8 47 4.2 29
1700 927 0.5 5.1 35 3.1 21 1.5 11 - -
1 6.2 43 3.8 26 2.2 15 1.1* 7.2*
R 10 69 6.6 46 4.0 28 2.4 17
1800 982 0.5 3.1 21 1.5 11 0.48 3.3 - -
1 3.8 26 2.2 15 1.0 6.9 0.33* 2.3*
R 6.7 46 4.0 28 2.3 16 1.2 8.3
1900 1038 0.5 1.6 11 - - - - - -
1 2.2 15 1.0 6.9 0.33* 2.3* - -
R 4.1 28 2.4 17 1.2 8.3 - -
2000 1093 0.5 0.62 4.3 - - - - - -
1 1.1 7.6 0.35 2.4 0.10* 0.69* - -
R 2.5 17 1.3 8.6 0.40 2.8 - -
*Significant extrapolation

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