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HAYNES® Alloys

Creep and Stress-Rupture Strengths

Minimum Creep Rate, Sheet*

Test Temperature Approximate Initial Stress to Produce Specified Creep in:
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

*Solution-annealed. Based on over 100 tests for sheet and over 150 tests for plate and bar.

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

Average Rupture Data, Sheet*

Test
Temperature
Approximate Rupture Life Strength for Time Indicated:
10 h 100 h 1,000 h 10,000 h
°F °C ksi MPa ksi MPa ksi MPa ksi MPa
1200 649 67.0 462 48.0 331 34.0 234 24.9 170
1400 760 32.0 221 22.5 155 15.8 109 11.1 77
1600 871 17.0 117 10.6 73 6.5 45 4.0 28
1800 982 6.5 45 3.7 26 2.1 14 1.2 8
2000 1093 2.4 17 1.2 8 0.6 4 - -

*Solution-annealed. Based on over 100 tests 

Average Rupture Data, Plate and Bar*

Test
Temperature
Approximate Rupture Life Strength for Time Indicated:
10 h 100 h 1,000 h 10,000 h
°F °C ksi MPa ksi MPa ksi MPa ksi MPa
1200 649 72.0 496 47.9 330 34.0 234 24.0 165
1350 732 36.0 248 25.0 172 18.0 124 12.5 86
1500 816 21.0 145 14.0 96 10.0 69 6.8 47
1650 899 12.0 83 7.5 52 4.7 32 3.0 21
1800 982 7.0 48 4.2 29 2.4 17 1.4 10
1950 1066 3.7 26 1.9 13 1.0** 7 - -
2100 1149 1.7 12 0.7 5 0.3** 2 - -

*Solution-annealed. 
**Extrapolated
Based on over 100 tests for sheet and over 150 tests for plate and bar. 

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