HAYNES® 230® alloy exhibits excellent resistance to grain growth at high temperatures. As a consequence of its very stable primary carbides, 230® alloy can be exposed at temperatures as high as 2200°F (1204°C) for up to 24 hours without exhibiting significant grain growth. Materials such as HAYNES® 188 alloy or HASTELLOY® X alloy exhibit greater grain growth under such conditions, as would most iron-, nickel-, or cobalt-base alloys and stainless steels.
| Exposure Time
|
Grain Size for Alloys Exposed at Temperature for Various Times*
|
| HAYNES® 230® alloy |
HAYNES® 188 alloy |
HASTELLOY® X alloy
|
| h
|
2150°F (1177°C)
|
2200°F (1204°C) |
2150°F (1177°C)
|
2200°F (1204°C) |
2150°F (1177°C)
|
2200°F (1204°C) |
| 0 |
4-4 1/2 |
4-4 1/2 |
4-5 |
4-5 |
3 1/2 |
3 1/2 |
| 1 |
4-5 |
4-4 1/2 |
2-5 |
2-4 |
3 1/2 |
0-1 |
| 4 |
4-4 1/2 |
4-4 1/2 |
3 1/2 |
3 |
3 1/2 |
0-1 |
| 24 |
4 |
4-4 1/2 |
0-2 |
1-3 |
00-4 |
0-1 1/2 |
*Plate Product in the fully annealed condition