Inconel 625 Alloy Pipe (Ni-Cr-Mo-Nb Alloy) | Exceptional Corrosion Resistance & High-Temperature Strength

✓ Corrosion Immunity: Resists chloride stress corrosion cracking (Cl-SCC), seawater erosion, and sulfuric/phosphoric acid exposure up to 400°C (752°F).

✓ High-Temperature Strength: Maintains 550 MPa tensile strength at 650°C (1,202°F) – 30% stronger than Inconel 600 under similar conditions.

✓ Weldability & Fabrication: Low carbon content (<0.01%) minimizes carbide precipitation; compatible with ERNiCrMo-3 filler for TIG/MIG welding.

✓ Precision Manufacturing: Seamless and welded pipes with **±0.1mm wall thickness tolerance** and Ra ≤1.6μm internal finish for high-purity fluid transfer.

Inconel 625 Alloy Pipe (Ni-Cr-Mo-Nb Alloy)

Engineered for aerospace, marine, and chemical processing applications demanding extreme corrosion resistance and mechanical stability, Inconel 625 alloy pipe combines a nickel-chromium-molybdenum-niobium matrix (Ni-58%, Cr-20%, Mo-8%, Nb-3.6%) to deliver unmatched resistance to pitting, crevice corrosion, and oxidation up to 980°C (1,796°F). Certified to AMS 5666, ASTM B444, and ASME SB444, this alloy outperforms 316L stainless steel and Incoloy 825 in aggressive environments, offering 2.5x the lifespan in chloride-rich or acidic conditions.

Sizes: OD 6mm–300mm (seamless) / OD 300mm–1,200mm (welded)
Wall Thickness: 1mm–50mm
Surface Finishes: Pickled, Electropolished, Grinded (Ra ≤0.8μm)
Mechanical Properties (Room Temp): Yield Strength ≥415 MPa | Tensile Strength ≥830 MPa | Elongation ≥30% | Hardness ≤220 HBW

Parameter Category	Value/Description
Material Standard	ASTM B444 (Seamless Pipe), ASTM B704/B705 (Welded Pipe), GB/T 15007 (China)
Chemical Composition (%)	Ni ≥58.0, Cr 20.0–23.0, Mo 8.0–10.0, Nb+Ta 3.15–4.15, Fe ≤5.0, Al ≤0.40, Ti ≤0.40, C ≤0.10, Mn ≤0.50, Si ≤0.50, S ≤0.015, P ≤0.015
Tensile Strength (MPa)	≥930 (Annealed)
Yield Strength (MPa)	≥517 (Annealed)
Elongation (%)	≥35 (in 50mm gauge length)
High-Temperature Strength	– 650°C: Tensile Strength ≥550 MPa – 650°C: 100h Creep Rupture Strength ≥200 MPa
Hardness	Brinell (HBW): ≤220; Rockwell (HRB): ≤96
Density (g/cm³)	8.44
Melting Range (°C)	1290–1350
Thermal Conductivity (W/m·K)	12.0 (at 20°C)
Thermal Expansion (10⁻⁶/°C)	12.8 (20–100°C) 15.3 (20–600°C)
Electrical Resistivity (Ω·m)	1.28 × 10⁻⁶ (at 20°C)
Elastic Modulus (GPa)	207
Corrosion Resistance	Excellent resistance to pitting, crevice corrosion, chloride stress corrosion cracking, and sulfuric/hydrochloric acids. Performs well in marine and chemical processing environments.
Heat Treatment	Solution Treatment: 1093–1177°C (rapid cooling). No aging required.
Surface Finishes	Annealed & Pickled, Polished (Ra ≤0.8μm), Cold-Drawn, or Hot-Finished.
Pipe Dimensions	– Outer Diameter (OD): 6mm–300mm (Seamless) – Wall Thickness: 0.5mm–25mm – Length: 1000mm–12000mm (customizable).
Key Applications	Aerospace hydraulic systems, seawater piping, chemical processing reactors, nuclear waste reprocessing, and oil/gas downhole tubing.

Inconel 625 Alloy Pipe (Ni-Cr-Mo-Nb Alloy) Applications

Industry	Critical Use Cases	Inconel 625 Pipe Advantage
Aerospace	Jet engine exhaust systems, fuel transfer lines	Resists hot corrosion at 900°C (1,652°F).
Marine Engineering	Subsea pipelines, seawater cooling systems	Immune to pitting/crevice corrosion in 3.5% NaCl seawater.
Chemical Processing	HCl acid evaporators, sour gas scrubbers	Withstands 15% H₂SO₄ and HCl vapors at 150°C (302°F).
Oil & Gas	Offshore risers, downhole tubing	Resists H₂S >5,000 ppm at 200°C (392°F).

Inconel 625 Alloy Pipe (Ni-Cr-Mo-Nb Alloy) Product Packaging

Inconel 625 Alloy Pipe (Ni-Cr-Mo-Nb Alloy) (UNS N06625/N07718, ASTM B705/ASME SB-705 compliant) are engineered for critical applications in aerospace propulsion, nuclear reactors, and subsea oil & gas systems (operating up to 1,200°C). To safeguard their metallurgical integrity and dimensional precision during global transit, we deploy aerospace-certified packaging systems and thermal-controlled logistics compliant with AMS 5581, NACE MR0175, and ISO 9328-3 standards.

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