Incoloy 825 |UNS N08825|2.4858 Seamless Tube
Our Incoloy 825 seamless pipes comply with ASTM B423 and ASME SB423 standards, offering superior protection against stress-corrosion cracking, pitting, and crevice corrosion in sulfuric and phosphoric acid environments. Through advanced cold-drawing and precise heat treatment, Tengqi delivers durable, high-strength tubing for chemical processing, marine engineering, and oil & gas applications. Rely on our expertise for certified alloy solutions that meet the most stringent industrial specifications.
SeamlessIncoloy 825 Tube (Incoloy825 / UNS N08825 / W.Nr. 2.4858) is a titanium-stabilized Ni-Fe-Cr-Mo-Cu alloy for sulfuric and phosphoric acid service. Manufactured by Tengqi in Fujian, China, every heat is fully traceable, hydro-tested and available with third-party inspection (SGS / BV / TUV) on request.
Product Specifications
- ASTM B163 — Seamless Condenser & Heat Exchanger Tubes
- ASTM B167 / B407 / B423 — Seamless Tube
- ASTM B444 — Seamless Pipe & Tube
- ASTM B704 — Welded Tube
- ASTM B829 — General Requirements
- Finishing: solution annealed, pickled & polished; bright annealed available on request
Size Range
| Outside Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 6.35 mm – 257 mm (1/4"– 10.1") | 0.5 mm – 12.7 mm | ≤ 22 m |
Chemical Composition
Incoloy825 (UNS N08825) — Composition %
| UNS | C | Mn | S | Si | Cr | Ni | Mo | Cu | Ti | Al | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| N08825 | ≤ 0.05 | ≤ 1.0 | ≤ 0.03 | ≤ 0.5 | 19.5 – 23.5 | 38.0 – 46.0 | 2.5 – 3.5 | 1.5 – 3.0 | 0.6 – 1.2 | ≤ 0.2 | ≥ 22.0 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed, pickled & polished |
| Tensile Strength | ≥ 586 MPa |
| Yield Strength (0.2% offset) | ≥ 241 MPa |
| Elongation in 2 in. / 50 mm | ≥ 30% |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.14 g/cm3 |
| Thermal Conductivity | 11.1 W/m·K |
| Specific Heat Capacity | 440 J/kg·K |
| Elastic Modulus | 196 GPa |
| Magnetic Properties | Practically non-magnetic |
| PREN (Pitting Resistance Equivalent) | 30.0-33.0 |
Industry Applications
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