ASME SB163 UNS N08825 Inconel 825 Seamless Tube, Ni-Cr-Mo-Cu Alloy Steel for Condensers and Heat Exchangers
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ASME SB163 UNS N08825 Inconel 825 Seamless Tube, Ni-Cr-Mo-Cu Alloy Steel for Condensers and Heat Exchangers
The ASME SB163 N08825 (Incoloy 825) nickel alloy seamless tube is manufactured according to ASTM standard in cold rolled and drawing in seamless process, finished in pickling and annealing condition. The nickel alloy tubes are uniform in quality and temper, smooth, commercially straight, and free of injurious imperfections. It achieves the perfect balance between performance and economy in complex corrosive environments through the synergistic strengthening of nickel-chromium-molybdenum-copper. Its excellent resistance to stress corrosion cracking, pitting and crevice corrosion, as well as resistance to reducing media such as sulfuric and phosphoric acids, makes it the ideal choice for condenser and heat exchanger tubing in demanding applications across chemical, oil & gas, marine engineering, and energy & environmental industries.
| UNS | DIN | EN | JIS | BS | ISO |
| N08825 / Inconel 825 | 2.4858 | NiCr21Mo/2.4858 | NCF 825 | NA16 | NiFe30Cr21Mo3 |
Chemical & Mechanical Properties
| ASME SB163 N08825 Chemical Composition (%) |
||||||||||
|
Ni |
Cu |
Mo |
Fe |
Mn |
C |
Si |
S |
Cr |
Al |
Ti |
|
38.0-46.0 |
1.5-3.0 | 2.5-3.5 | ≥22.0 | ≤1.0 | ≤0.05 | ≤0.5 | ≤0.03 | 19.5-23.5 | ≤0.2 | 0.6-1.2 |
Mechanical Properties
| Tensile Strength min, ksi (MPa)
|
Yield Strength (0.2% offset) min, ksi (MPa)
|
Elongation
in 2 in. or 50 mm
|
Maximum Allowable Stress
psi(MPa) |
|
|
Annealed
|
85(586) | 35(241) | 30 | 21000(144.8) |
Key Corrosion Resistance Features
*Incoloy 825 is a versatile engineering alloy with excellent resistance to acid and alkali corrosion in both oxidizing and reducing environments. Its outstanding corrosion resistance stems from the synergistic effects of nickel, chromium, molybdenum, copper and other elements.
- Stress Corrosion Cracking Resistance
- Pitting & Crevice Corrosion Resistance
- Reducing Acid Resistance
- Oxidizing Acid Resistance
- Intergranular Corrosion Resistance
- Seawater Corrosion Resistance
Tolerances In Outside Diameter And Wall Thickness
| Material | Nominal Outside Diameter, In. (Mm) | Permissible Variations | |||||
| Outside Diameter, In. (Mm) | Wall Thickness % | ||||||
| 1/2 To 5/8 (12.7 To 15.9), Excl | Minimum Wall | ||||||
| + | - | + | - | + | - | ||
| UNS N02200, UNS N02201, And UNS N04400 |
1/2 To 5/8 (12.7 To 15.9), Excl |
0.005(0.13) | 0 | 12.5 | 12.5 | 25.0 | 0 |
|
8/5 To 1 1/2 (15.9 To 38.1), Incl |
0.005(0.13) | 0.005(0.13) | 10.0 | 10.0 | 20.0 | 0 | |
|
Over 1 1/2 To 3 (38.1 To 76.2), Incl |
0.010(0.25) | 0.010(0.25) | 10.0 | 10.0 | 22.0 | 0 | |
| UNS N06600, UNS N066090, UNS N06045, UNS N06025, UNS N08800, UNS N08810, UNS N08811, UNS N08801, And UNS N08825 |
1/2 To 5/8 (12.7 To 15.9), Excl |
0.005(0.13) | 0.005(0.13) | 12.5 | 12.5 | 25.0 | 0 |
|
8/5 To 1 1/2 (15.9 To 38.1), Incl |
0.0075(0.19) | 0.0075(0.19) | 10.0 | 10.0 | 20.0 | 0 | |
| Over 1 1/2 To 3 (38.1 To 76.2), Incl | 0.0075(0.19) | 0.010(0.25) | 10.0 | 10.0 | 22.0 | 0 | |
Key Applications
-
Chemical & Petrochemical Processing – Reactors, heat exchangers, acid pickling equipment, pumps, valves, and piping for sulfuric/phosphoric acid service.
-
Oil & Gas – Downhole tubulars (tubing, casing, packers, safety valves), control lines, sour-gas pipelines (H₂S/CO₂ resistance), and subsea flowlines.
-
Marine Engineering – Seawater-cooled heat exchangers, desalination units, shafts, and seawater piping systems.
-
Pollution Control – Flue gas desulfurization (FGD) systems and waste treatment (hazardous/radioactive).
-
Nuclear & Power – Nuclear fuel reprocessing, waste handling, and power plant equipment.
-
Other – Hydraulic systems, instrumentation tubing, food processing, and fasteners/springs.
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