Relationship between SCC resistance and precipitation phase of Hastelloy C-276 alloy in high concentration chloride see Table 8-34, compared with Hastelloy C-276 alloy, its SCC resistance is significantly improved.
Table 8-34 Relationship between SCC resistance and precipitation phase of Ni-Cr-Mo-W alloy in boiling 45% MgCl2
|
alloy |
w(C)/% |
w(Si)/% |
Heat treatment |
Precipitates |
SCC (154℃, 45%MgCl2) |
|
Hastelloy C-276 |
0.05 |
0.70 |
Solid solution |
none |
2407h, noneSCC |
|
704℃ xlh |
m6c |
107 ~552h, IGC0 |
|||
|
871℃xlh |
m6c, p， |
90h, IGC |
|||
|
1030℃ xlh |
M6c, [1 |
552 ~ 625h, IGC |
| 00Crl6Ni60Mol6W4
(Hastelloy C-276) |
0.01 |
0.01 |
704℃ xlh |
U,Small amount M6C |
6536h, none SCC |
|
871℃ xlh |
U, M6C |
905 ~2100h, ICC |
|||
| 1038℃xlh |
U, Small amount M6C |
6536h,none SCC |
|||
|
0. 008 |
0.004 |
1149℃xlh |
无 |
2847h,none SCC |
|
| 704℃ xlh |
U, Small amount M6C |
2252h,破裂 |
|||
| 871℃ xlh |
U, Small amount M6C |
957h, IGC |
|||
| 1038℃ xlh |
U,Small amount M6C |
4539h, IGC |
|||
|
0.04 |
0.01 |
Factory annealing |
none |
2407h,none SCC |
|
| 704℃ xlh |
U |
2407h,none SCC |
|||
| 871 °C xlh |
U |
2407h,none SCC |
|||
| 1038℃ xlh | U |
2407h,none SCC |