Alloy 825
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
Available Tube Product form
- Straight
- Coiled
- Seamless
- Seam welded and cold redrawn
- Seam welded, cold redrawn and annealed
Technical Data
Mechanical Properties
| Temper | Annealed | |
|---|---|---|
| Tensile Rm | 85 | ksi (min) |
| Tensile Rm | 590 | MPa (min) |
| R.p. 0.2% Yield | 35 | ksi (min) |
| R.p. 0.2% Yield | 240 | MPa (min) |
| Elongation (2” or 4D gl) | 30 | % (min) |
Physical Properties (Room Temperature)
| Name | ||
|---|---|---|
| Specific Heat (0-100°C) | 440 | J.kg-1.°K-1 |
| Thermal Conductivity | 11.1 | W.m -1.°K-1 |
| Thermal Expansion | 14 | μm/μm/°C |
| Modulus Elasticity | 196 | GPa |
| Electrical Resistivity | 1.13 | μohm/cm |
| Density | 8.13 | g/cm3 |
Chemical Composition (% by weight)
| Element | Min | Max |
|---|---|---|
| C | – | 0.05 |
| Si | – | 0.5 |
| Mn | – | 1 |
| P | – | 0.03 |
| S | – | 0.03 |
| Al | – | 0.2 |
| Cr | 19.5 | 23.5 |
| Cu | 1.5 | 3 |
| Fe | Balance | |
| Mo | 2.5 | 3.5 |
| N | 0.15 | 0.25 |
| Ni | 38 | 46 |
| Ti | 0.60 | 1.20 |
Alloy 825 Avaliability
AVAILABILITY
- Alloy 825 Seamless Pipe 1/4”- 8”
- Alloy 825 Welded Pipe 8” – 24”
- Alloy 825 Butt-Weld Fittings 1/2” – 24”
- Alloy 825 Flanges 1/2” – 24”
- Alloy 825 Bar 1/8” – 11”
- Alloy 825 Seamless Tube 1/8” – 1”
- Alloy 825 Pressure Fittings 1/4” – 2”
- Alloy 825 Plate 1/8” – 3”
SPECIFICATIONS
ASTM B443, B705, B366, B425, B564
ASME SB443, SB705, SB366, SB925, SB564
TENSILE REQUIREMENTS
Alloy 825 bars
Alloy 825 butt-weld fittings
Alloy 825 fitting
Alloy 825 flanges
Alloy 825 seamless pipe
Alloy 825 tubing
Alloy 825 welded pipe