Incoloy 925 Seamless Nickel Alloy Steel Pipe

Seamless Incoloy 925 Nickel Allloy Steel Pipe Summary

Seamless Incoloy 925 Nickel Allloy Steel Pipe is a high-strength, corrosion-resistant nickel-iron-chromium alloy, enhanced with molybdenum, copper, titanium, and aluminum. Referred to as a "nickel alloy steel" in industrial contexts due to its significant iron content, this precipitation-hardenable superalloy is engineered for exceptional strength and resistance to aggressive environments, particularly in sour gas (H₂S, CO₂) and chloride-rich conditions. Seamless construction ensures structural integrity under high pressure and temperature, making it ideal for critical applications in oil and gas, marine, and chemical processing industries.

Chemical

Nickel (Ni)	38.0–46.0
Chromium (Cr)	19.5–23.5
Iron (Fe)	Balance (22.0 min)
Molybdenum (Mo)	2.5–3.5
Copper (Cu)	1.5–3.0
Titanium (Ti)	1.9–2.4
Aluminum (Al)	0.1–0.5
Carbon (C)	0.03 max
Manganese (Mn)	1.0 max
Silicon (Si)	0.5 max
Phosphorus (P)	0.03 max
Sulfur (S)	0.03 max

Mechanical

Tensile Strength	965 MPa (140 ksi) min
Yield Strength (0.2% offset)	724 MPa (105 ksi) min
Elongation	25% min
Hardness (Rockwell C)	38 max
Density	8.08 g/cm³
Melting Point	1311–1366°C (2392–2491°F)

Applications

Oil and Gas: Downhole tubing, casing, and completion equipment in sour gas wells (NACE MR0175/ISO 15156 compliant).
Marine: Piping, valves, and fittings exposed to seawater.
Chemical Processing: Piping systems for corrosive fluids, heat exchangers.
Aerospace: High-strength, corrosion-resistant components.

Additional Notes

Heat Treatment: Solution annealing at 980–1010°C, followed by age-hardening at 732–760°C, maximizes strength and corrosion resistance.
Standards Compliance: Meets NACE MR0175/ISO 15156 for sour service in oil and gas.
Fabrication: Can be welded with matching Incoloy 925 filler metals; post-weld heat treatment may be required to restore properties.