High Temperature Properties
Cyclic Oxidation Resistance
| WEIGHT GAIN - GRAMS PER SQUARE METER OF SURFACE FOR TEMPERATURES SHOWN |
| ALLOY |
705C |
815C |
980C |
1090C |
| 409 |
0.1 |
0.8 |
1430* |
10,000* |
| 430 |
0.4 |
1.3 |
1660* |
10,000* |
| 304 |
0.2 |
1.7 |
3400 |
10,000* |
| 309 |
0.2 |
2.7 |
120 |
910 |
NOTE: These were cyclic tests for 100 hours duration in air containing 10% water vapor. Cycled every 2 hours to room temperature then back to test temperature. Weight gain (or loss) measured without purposeful removal of scale.
*Some of the higher temperature tests were for much shorter time than the 100 hours.
| TENSILE and YIELD STRENGTH AT TEMPERATURES SHOWN (ksi) |
| |
24C |
540C |
650C |
| Alloy |
Tensile |
Yield |
Tensile |
Yield |
Tensile |
Yield |
| 304 |
87 |
39 |
55 |
18 |
44 |
16 |
| 309S |
90 |
45 |
67 |
36 |
54 |
28 |
| 310 |
95 |
45 |
70 |
24 |
58 |
19 |
| 316 |
84 |
40 |
67.5 |
28 |
55 |
24 |
| 321 |
79 |
31 |
57.5 |
26 |
45 |
21 |
| 347 |
95 |
40 |
60 |
20.5 |
50.5 |
20 |
| *403 |
110 |
75 |
65 |
52 |
87 |
n/a |
| *410 |
125 |
108 |
75 |
n/a |
20 |
n/a |
NOTE: Alloys indicated by * were tested in heat treated condition, others in annealed condition.
| 1000 HOUR STRESS-RUPTURE AT TEMPERATURES SHOWN |
| Alloy |
538C |
650C |
815C |
| 304 |
37 |
17 |
4 |
| 309S |
n/a |
19 |
4 |
| 310S |
32 |
18 |
6 |
| 316 |
n/a |
24 |
7 |
| 347 |
49 |
23 |
4 |
| 410 |
19 |
n/a |
n/a |
| 430 |
18 |
5 |
1 |
General Information on High Temperature Properties:
Allowable stresses for austenitic (300 series) stainless steel unfired pressure vessels are found in Section VIII of the ASME Boiler Code, table UHA-23. Additional information on high temperature properties can also be found in the ASM Metals Handbook, Volume 3, 10th Edition.
| POISSON'S RATIO AT TEMPERATURES SHOWN |
| |
TEMPERATURE |
| ALLOY |
150C |
260C |
370C |
480C |
595C |
705C |
815C |
| 304 |
0.28 |
0.30 |
0.32 |
0.28 |
0.29 |
0.28 |
0.25 |
| 309 |
0.28 |
0.30 |
0.30 |
0.29 |
0.27 |
0.32 |
0.25 |
| 310 |
0.32 |
0.31 |
0.31 |
0.32 |
0.34 |
0.34 |
0.29 |
| 316 |
0.26 |
0.29 |
0.34 |
0.30 |
0.32 |
0.31 |
0.24 |
| 321 |
0.23 |
0.25 |
0.27 |
0.30 |
0.29 |
0.27 |
n/a |
| 347 |
0.30 |
0.31 |
0.29 |
0.33 |
0.31 |
0.35 |
0.28 |
By definition, Poisson's ratio is the ratio of lateral strain to longitudinal strain for a material subjected to uniform longitudinal stresses within the proportional limit.