ALLOY 625 MATERIAL DATA SHEETS
Chemical Composition
|
Chemical Composition |
Cr |
Ni |
Mo |
Co |
Cb+Ta |
Al |
Ti |
C |
Fe |
Me |
Mn |
Si |
P |
S |
|
% Values (minimum) |
20.0 |
|
8.0 |
- |
3.15 |
- |
- |
- |
- |
|
- |
- |
- |
- |
|
% Values (maximum) |
23.0 |
bal |
10.0 |
1.0 |
4.15 |
0.4 |
0.4 |
0.1 |
5.0 |
|
0.5 |
0.5 |
0.015 |
0.015 |
Mechanical Properties
| Mechanical & Physical Properties |
21°C |
204°C |
316°C |
427°C |
538°C |
649°C |
760°C |
871°C |
| Ultimate Tensile Strength /Mpa |
992.9 |
923.9 |
910.1 |
910.1 |
896.3 |
820.5 |
527.8 |
275.8 |
| 0.2% Yield Strength /MPa |
579.2 |
455.1 |
434.4 |
420.6 |
420.6 |
413.7 |
406.8 |
268.9 |
| Elongation % |
44 |
45 |
42.5 |
45 |
48 |
34 |
59 |
117 |
| Coefficient of Thermal Expansion um/moC |
- |
13.1 |
13.3 |
13.7 |
14 |
14.8 |
15.3 |
15.8 |
| Thermal Conductivity /kcal/(hr.m.c) |
8.5 |
10.7 |
12.2 |
13.5 |
15 |
16.4 |
17.9 |
19.6 |
| Modulus of Elasticity/ MPa |
2.07 |
1.93 |
1.93 |
1.86 |
1.79 |
1.65 |
1.59 |
- |
Applications
● Jet engine exhaust systems
● Engine thrust- reverser systems
● Aircraft ducting systems
● Turbine shroud rings
● Bellows and expansion joints
● Seawater components
● Chemical process equipment
Corrosion Resistance
Alloy 625 has withstood many corrosive environments. In alkaline, salt water, fresh water, neutral salts, and in the air, almost no attack occurs. The nickel and chromium provide resistance to oxidizing environments. Nickel and molybdenum provide for resistance to no oxidizing atmospheres.
Pitting and crevice corrosion are prevented by molybdenum. Niobium stabilizes the alloy against sensitization during welding. Chloride stress-corrosion cracking resistance is excellent. The alloy resists scaling and oxidation at high temperatures.
Inventory
| PRODUCT FORM |
SIZE RANGE FROM |
SIZE RANGE TO |
| Alloy 625 pipe |
0.5 in |
8 in |
| Alloy 625 coil |
0.25 mm |
3.18 mm |
| Alloy 625 welding wire |
0.5 mm |
3.175 mm |
| Alloy 625 sheet & plate |
0.25 mm |
76.2 mm |
| Alloy 625 round bar |
12 mm |
260 mm |
| Alloy 625 pipe fittings |
0.5 in |
8 in |
| Alloy 625 filanges |
0.5 in |
8 in |
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