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Creep and Stress-Rupture Strengths

Plate- 2050°F  (1121°C) Solution-anneal

Test Temperature
Creep
Approximate Initial Stress to Produce Specified Creep in:
100 h
1000 h
10,000 h
100,000 h
°F
°C
%
ksi
MPa
ksi
MPa
ksi
MPa
ksi
MPa
1100
 593
 1.0
29.4
 203
 20.4
 141
 14.4*
 100
 -
 -
-
 -
 Rupture
 45.5
 315
 32.2
 223
 22.9
 158
 16.3
 133
1200
 649
 1.0
18.9
 131
 12.1
 91
 9.3*
 64
 -
 -
-
 -
 Rupture
 32.2
 223
 22.4
 154
 15.6
 108
 11.0
 76
1300
 704
 1.0
12.5
 86
 8.7
 60
 6.2*
 43
 -
 -
-
 -
 Rupture
 22.9
 158
 15.7
 108
 10.8
 75
 7.4
 51
1400
 760
 1.0
8.5
 59
 6.0
 41
 4.2*
 29
 -
 -
-
 -
 Rupture
 16.4
 113
 11.0
 76
 7.4
 51
 5.0
 34
1500
 816
 1.0
5.9
 41
 4.1
 28
 2.9*
 20
 -
 -
-
 -
 Rupture
 11.7
 81
 7.7
 53
 5.1
 35
 3.4
 23
1600
 871
 1.0
4.2
 29
 2.9
 20
 2.1*
 14
 -
 -
-
 -
 Rupture
 8.4
 58
 5.5
 38
 3.6
 25
 2.4
 17
1700
 927
 1.0
3.0
 21
 2.1
 14
 1.5*
 10
 -
 -
-
 -
 Rupture
 6.1
 42
 3.9
 27
 2.5
 17
 1.6
 11
1800
 982
 1.0
2.2
 15
 1.5
 10
 1.1*
 8
 -
 -
-
 -
 Rupture
 4.4
 30
 2.8
 19
 1.8
 12
 1.2
 8

*Extrapolation

Sheet, Solution-annealed

Temperature Creep Approximate Initial Stress to Produce Specified Creep in
100 Hours 1,000 Hours
°F °C % ksi MPa ksi MPa
1200 649 0.5 16 110 12.5 86
1 18.5 128 15 103
R 28 193 20 138
1300† 704 0.5 11.5 79 9.2 63
1 13.9 96 10.8 74
R 19 131 14.5 100
1400 760 0.5 8.5 59 6.8* 47*
1 9.9 68 8.2* 57*
R 13 90 9.9 68
1500 816 0.5 6.2 43 4.9* 34*
1 8.2 57 6.0* 41*
R 9.6 66 7.9 54
1600 871 0.5 4.7 32 3.4* 23*
1 5.2 36 4.3* 30*
R 6.8 47 5.1 35
1700 927 0.5 3.2 22 2.1* 14*
1 3.6 25 2.7* 19*
R 4.6 32 3.2 22
1800 982 0.5 2.1 14 1.2 8.3
1 2.7 19 1.6 11
R 3.5 24 2.6 18

*Significant extrapolation
† Values obtained using Larson-Miller interpolation

Comparative Stress-Rupture Strengths

Test Temperature 10,000 Hour Rupture Strengths (ksi*)
°F °C HR-160® RA333® 800HT RA330® 253 MA RA85H 309 310
1200 649 15.6 16.5 17.5 11.0 14.0 12.0 16.0 9.3
1300 704 10.8 12.0 11.0 - 8.5 - - -
1400 760 7.4 9.2 7.3 4.3 5.2 5.0 5.45 3.9
1500 816 5.1 5.7 5.2 - 3.75 - - -
1600 871 3.6 3.1 3.5 1.7 2.5 2.1 1.86 1.65
1700 927 2.5 1.8 1.9 - 1.65 - - -
1800 982 1.8 1.05 1.2 0.63 1.15 0.9 0.63 0.69
Test Temperature 100,000 Hour Rupture Strengths (ksi*)
°F °C HR-160®** RA333® 800HT RA330® 253 MA RA85H 309 310
1200 649 11.0 11.5 13.0 7.6 8.7 8.0 11.6 6.5
1300 704 7.4 8.4 8.0 - 4.6 - - -
1400 760 5.0 6.5 5.3 2.7 3.9 3.2 3.8 2.6
1500 816 3.4 3.7 3.7 - 2.1 - - -
1600 871 2.4 1.9 2.5 1.0 1.45 1.3 1.25 1.06
1700 927 1.6 1.05 1.2 - 0.97 - - -
1800 982 1.2 0.58 0.8 0.33 0.7 0.5 0.41 0.42

*ksi can be converted to MPa (megapascals) by multiplying 6.895.
**Extrapolation.

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