High Nickel Alloy Pipe
High Nickel Alloy Pipes serve as critical conduits in systems transporting corrosive fluids or gases under extreme pressure and temperature conditions. Produced by seamless or welded methods, these pipes boast outstanding creep resistance and dimensional accuracy, essential for high-integrity flow lines. Their composition offers superior toughness and fatigue resistance, reducing the risk of failures during long-term service. Commonly used in chemical processing, nuclear reactors, and power plants, these pipes maintain structural integrity and corrosion resistance in both oxidizing and reducing environments, enabling safer and more efficient fluid transfer.
High Nickel Alloy Pipe - Specification Table
| Parameter | Description / Options |
|---|---|
| Material Grade | Inconel 600, Inconel 625, Inconel 718, Monel 400, Monel K500, Alloy 20, Alloy 825 |
| Standards | ASTM B163, B167, B423, B729, B464, ASME SB163, SB167, SB423, SB729, SB464 |
| Size Range | ½” NB to 24” NB (Seamless), up to 60” NB (Welded / Fabricated) |
| Wall Thickness | Sch 5 to Sch XXS or per ASME B36.10 / B36.19 |
| Pipe Length | Single Random (5–6m), Double Random (10–12m), or Custom Cut Lengths |
| Surface Finish | Annealed & Pickled, Bright Annealed, Polished |
| Heat Treatment | Solution Annealed at 1000–1200°C (Grade-specific), Rapid Quenching |
| Mechanical Properties | Yield Strength: ≥ 240–550 MPa, Tensile Strength: ≥ 550–960 MPa, Elongation: ≥ 30% |
| Hardness | Typically ≤ 100 HRB (varies by grade); Inconel 718 may be age-hardened |
| Corrosion Resistance | High resistance to acids, seawater, oxidation, and chloride stress cracking |
| Testing | Hydrostatic, Eddy Current, PMI, IGC, Ultrasonic (UT), Radiography (RT), Mechanical & Chemical Tests |
| Certifications | EN 10204 3.1 / 3.2, NACE MR0175 / ISO 15156, PED 2014/68/EU, AD 2000 W0 |
| Applications | Oil & Gas, Chemical Plants, Marine, Heat Exchangers, Power Generation, Desalination |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| Inconel 600 | ≥ 240 | ≥ 550 | ≥ 30 | ≤ 85 HRB |
| Inconel 625 | ≥ 414 | ≥ 827 | ≥ 30 | ≤ 96 HRB |
| Inconel 718 | ≥ 1030 (solution annealed) | ≥ 1240 | ≥ 12–15 | Up to 40 HRC (age-hardened) |
| Monel 400 | ≥ 170 | ≥ 480 | ≥ 35 | ≤ 75 HRB |
| Monel K500 | ≥ 690 | ≥ 965 | ≥ 20 | Up to 35 HRC (age-hardened) |
| Alloy 20 | ≥ 240 | ≥ 620 | ≥ 30 | ≤ 95 HRB |
| Alloy 825 | ≥ 240 | ≥ 585 | ≥ 30 | ≤ 90 HRB |
Chemical Composition:
| Element | Inconel 600 | Inconel 625 | Inconel 718 | Monel 400 | Monel K500 | Alloy 20 | Alloy 825 |
|---|---|---|---|---|---|---|---|
| Nickel (Ni) | 72.0 min | 58.0 min | 50.0–55.0 | ≥ 63.0 | ≥ 63.0 | 32.0–38.0 | 38.0–46.0 |
| Chromium (Cr) | 14.0–17.0 | 20.0–23.0 | 17.0–21.0 | — | — | 19.0–21.0 | 19.5–23.5 |
| Iron (Fe) | 6.0–10.0 | 5.0 max | Balance | 2.0–2.5 | 2.0–2.5 | Balance | Balance |
| Molybdenum (Mo) | — | 8.0–10.0 | 2.8–3.3 | — | — | 2.0–3.0 | 2.5–3.5 |
| Copper (Cu) | — | — | — | 28.0–34.0 | 27.0–33.0 | 3.0–4.0 | 1.5–3.0 |
| Manganese (Mn) | 1.0 max | 0.5 max | 0.35 max | 2.0 max | 1.5 max | 2.0 max | 1.0 max |
| Carbon (C) | 0.15 max | 0.10 max | 0.08 max | 0.30 max | 0.25 max | 0.06 max | 0.05 max |
| Silicon (Si) | 0.5 max | 0.5 max | 0.35 max | 0.5 max | 0.5 max | 1.0 max | 0.5 max |
| Titanium (Ti) | — | 0.40 max | 0.65–1.15 | — | — | — | 0.6–1.2 |
| Aluminum (Al) | — | 0.40 max | 0.20–0.80 | — | 2.3–3.15 | — | 0.2 max |
| Columbium (Nb) | — | 3.15–4.15 (as Nb + Ta) | 4.75–5.5 | — | — | — | 0.6–1.2 |
| Sulfur (S) | 0.015 max | 0.015 max | 0.015 max | 0.024 max | 0.01 max | 0.035 max | 0.03 max |
| Phosphorus (P) | — | — | — | — | — | 0.035 max | 0.03 max |