Nickel & Nickel Alloys
N08825 • 2.4858
- Application
Alloy 825 (UNS N08825) is an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It was developed to provide exceptional corrosion resistance in both oxidizing and reducing environments. The alloy is resistant to chloride stress-corrosion cracking and pitting.
The addition of titanium stabilizes Alloy 825 against sensitization in the as- welded condition making the alloy resistant to intergranular attack after exposure to temperatures in a range that would sensitize unstabilized stainless steels. The fabrication of Alloy 825 is typical of nickel-base alloys, with material being readily formable and weldable by a variety of techniques.
- Typical manufacturing specifications
ASTM B163, ASTM B423, ASTM B704 Also individual customer specifications.
- Industries predominantly using this grade
Oil and gas, Chemical processes, Nuclear and power etc.
Technical Data
Chemical composition(% by Weight)
Element | Ni | Cr | Mn | C | Cu | Si | S | Al | Ti | Mo |
|---|---|---|---|---|---|---|---|---|---|---|
Minimum | 38.0 | 19.5 | - | - | 1.5 | - | - | - | 0.6 | 2.5 |
Maximum | 46.0 | 23.5 | 1.0 | 0.05 | 3.0 | 0.5 | 0.03 | 0.2 | 1.2 | 3.5 |
Aiming | 40 | 20 | 0.6 | 0.01 | 1.7 | 0.3 | 0.0005 | 0.1 | 0.7 | 2.7 |
Mechanical Properties
| Specifications(Tubing, Annealed) | Actual data | |||
|---|---|---|---|---|
|
Tensile Rm |
85 |
ksi (min.) |
92 ~ 104 |
ksi |
|
Tensile Rm |
586 |
MPa (min.) |
640 ~ 720 |
MPa |
|
Yield (R.p. 0.2%) |
35 |
ksi (min.) |
37 ~ 62 |
ksi |
|
Yield (R.p. 0.2%) |
241 |
MPa (min.) |
260 ~ 430 |
MPa |
|
Elongation |
30 |
% (min.) |
35 ~ 50 |
% |