Creep and Stress-rupture Strength
HAYNES® 230® alloy is a solid-solution-strengthened material which combines excellent high-temperature strength with good fabricability at room temperature. It is particularly effective for very long-term applications at temperatures of 1200°F (650°C) or more, and is capable of outlasting stainless steels and nickel alloys by as much as 100 to 1 depending upon the temperature. Alternatively, the higher strength of 230® alloy allows for the use of design section thicknesses as much as 75 percent thinner than lesser alloys with no loss in load-bearing capability.
Stress-Rupture Lives for Various Alloys at Fixed Test Conditions (Bar and Plate)*
Alloy |
Hours to Rupture |
1400°F (760°C) |
1600°F (871°C) |
1800°F (982°C) |
- |
15.0 ksi (103 MPa) |
4.1 ksi (31 Mpa) |
2.0 ksi (14 Mpa) |
230® |
8,200 |
65,000 |
5,000 |
625 |
19,000 |
14,000 |
2,400 |
X |
900 |
5,000 |
2,100 |
800H |
130 |
1,200 |
920 |
INCONEL® 601 |
50 |
1,200 |
1,000 |
253 MA® |
140 |
900 |
720 |
600 |
15 |
280 |
580 |
316 SS |
100 |
240 |
130 |
RA330® |
30 |
230 |
130 |
304 SS |
10 |
100 |
72 |
*Based upon Larson-Miller extrapolation
Comparison of Stress to Produce 1% Creep in 1000 Hours (Sheet)
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230® Sheet, Solution Annealed
Temperature |
Creep |
Approximate Initial Stress to Produce Specified Creep in |
10 Hours |
100 Hours |
1,000 Hours |
10,000 Hours |
°F |
°C |
% |
ksi |
MPa |
ksi |
MPa |
ksi |
MPa |
ksi |
MPa |
1200 |
649 |
0.5 |
- |
- |
31 |
214 |
- |
- |
- |
-- |
1 |
- |
- |
35 |
241 |
24* |
165* |
- |
-- |
R |
- |
- |
51 |
352 |
36 |
248 |
28 |
193 |
1300† |
704 |
0.5 |
29 |
200 |
21 |
145 |
14.5 |
100 |
- |
-- |
1 |
33 |
228 |
23 |
159 |
17 |
114 |
- |
-- |
R |
47 |
324 |
34 |
234 |
26 |
179 |
20 |
134 |
1400 |
760 |
0.5 |
19.2 |
132 |
13.7 |
94 |
9.6 |
66 |
7.3 |
50 |
1 |
21 |
145 |
15.5 |
107 |
11.5 |
79 |
8.6 |
59 |
R |
32 |
221 |
24.5 |
169 |
18.2 |
125 |
13.2* |
91* |
1500 |
816 |
0.5 |
14.2 |
98 |
10.3 |
71 |
7.5 |
52 |
5.4* |
37* |
1 |
15 |
103 |
11.2 |
77 |
8.6 |
59 |
6.5* |
45* |
R |
23* |
161* |
17.5 |
121 |
12.5 |
86 |
8.4* |
58* |
1600 |
871 |
0.5 |
11.3 |
78 |
8.1 |
56 |
5.7 |
39 |
4.0 |
28 |
1 |
11.7 |
81 |
9.0 |
62 |
6.2 |
43 |
4.3 |
30 |
R |
17.0 |
117 |
12.5 |
86 |
8.2 |
57 |
5.6* |
39* |
1700 |
927 |
0.5 |
7.7 |
53 |
5.5 |
38 |
3.8 |
26 |
2.4* |
17* |
1 |
8.8* |
61* |
6.2 |
43 |
4.2 |
29 |
2.7* |
19* |
R |
12.0* |
83* |
8.0 |
55 |
5.1 |
35 |
3.2 |
22 |
1800 |
982 |
0.5 |
7.0 |
48 |
3.6 |
25 |
1.8 |
12 |
0.85 |
5.9 |
1 |
8.0 |
55 |
4.1 |
28 |
2.0 |
14 |
1.0 |
6.9 |
R |
10.0 |
69 |
5.4 |
37 |
2.6 |
18 |
1.2* |
8.3* |
1900 |
1038 |
0.5 |
- |
- |
1.7 |
12 |
0.8 |
5.5 |
- |
-- |
1 |
- |
- |
2.0 |
14 |
0.9 |
6.2 |
- |
-- |
R |
- |
- |
3.0* |
21* |
1.5 |
10 |
- |
-- |
2000 |
1093 |
0.5 |
- |
- |
- |
- |
- |
- |
- |
-- |
1 |
- |
- |
0.9 |
6.2 |
- |
- |
- |
-- |
R |
- |
- |
- |
- |
- |
- |
- |
-- |
*Significant extrapolation
† Values obtained using Larson-Miller interpolation
230® Plate, Solution Annealed
Temperature |
Creep |
Approximate Initial Stress to Produce Specified Creep in |
10 Hours |
100 Hours |
1,000 Hours |
10,000 Hours |
°F |
°C |
% |
ksi |
MPa |
ksi |
MPa |
ksi |
MPa |
ksi |
MPa |
1200 |
649 |
0.5 |
- |
- |
35 |
241 |
23 |
159 |
- |
- |
1 |
- |
- |
39 |
269 |
26.5 |
183 |
17.5 |
121 |
R |
75 |
517 |
56 |
386 |
41 |
283 |
29 |
200 |
1300 |
704 |
0.5 |
35 |
241 |
21.5 |
148 |
14.5 |
100 |
- |
- |
1 |
39 |
269 |
24.5 |
169 |
18 |
124 |
12.3* |
85* |
R |
59 |
407 |
42 |
290 |
30 |
207 |
21 |
145 |
1400 |
760 |
0.5 |
19 |
131 |
13.5 |
93 |
10.0 |
69 |
- |
- |
1 |
23 |
159 |
15.9 |
110 |
11.5 |
79 |
9.0* |
62* |
R |
37 |
255 |
27 |
186 |
20 |
138 |
14.2 |
98 |
1500 |
816 |
0.5 |
14.0 |
97 |
10.4 |
72 |
8.2 |
57 |
6.1 |
42 |
1 |
16.5 |
114 |
12.5 |
86 |
9.5 |
66 |
6.9 |
48 |
R |
26 |
179 |
20 |
138 |
14.0 |
97 |
9.8 |
68 |
1600 |
871 |
0.5 |
10.3 |
71 |
7.6 |
52 |
5.6 |
39 |
4.0 |
28 |
1 |
11.7 |
81 |
9.0 |
62 |
6.2 |
43 |
4.3 |
30 |
R |
20 |
138 |
13.7 |
94 |
9.5 |
66 |
6.2 |
43 |
1700 |
927 |
0.5 |
7.8 |
54 |
5.7 |
39 |
3.9 |
27 |
2.5 |
17 |
1 |
8.8 |
61 |
6.8 |
47 |
4.5 |
31 |
2.7 |
19 |
R |
15.0 |
103 |
10.0 |
69 |
6.0 |
41 |
3.6 |
25 |
1800 |
982 |
0.5 |
5.8 |
40 |
3.5 |
24 |
1.8 |
12 |
0.90 |
6.2 |
1 |
6.3 |
43 |
4.0 |
28 |
2.1 |
14 |
1.1 |
7.6 |
R |
9.4 |
65 |
6.0 |
41 |
3.2 |
22 |
1.7 |
12 |
1900 |
1038 |
0.5 |
4.0 |
28 |
2.0 |
14 |
0.90 |
6.2 |
- |
- |
1 |
4.4 |
30 |
2.2 |
15 |
1.0 |
6.9 |
0.50* |
3.4* |
R |
7.0 |
48 |
3.7 |
26 |
1.8 |
12 |
1.0 |
6.9 |
2000 |
1093 |
0.5 |
1.9 |
13 |
0.80 |
5.5 |
0.35 |
2.4 |
- |
- |
1 |
2.3 |
16 |
1.0 |
6.9 |
0.47 |
3.2 |
0.20* |
1.4* |
R |
4.2 |
29 |
2.1 |
14 |
1.0 |
6.9 |
0.55 |
3.8 |
2100 |
1149 |
0.5 |
0.80 |
5.5 |
0.03* |
2.1* |
- |
- |
- |
- |
1 |
1.0 |
6.9 |
0.43 |
3.0 |
- |
- |
- |
- |
R |
2.3 |
16 |
1.2 |
8.3 |
0.60 |
4.1 |
- |
- |
*Significant extrapolation