Inconel 625 Seamless Tubes & Pipes: High-Strength Corrosion Resistance for Extreme Environments
Inconel 625 Tubes and Pipes are advanced nickel-chromium-molybdenum alloy solutions designed to excel in aggressive industrial settings. With a composition of 58% nickel, 20-23% chromium, and 8-10% molybdenum, Inconel 625 delivers unparalleled resistance to oxidation, pitting, crevice corrosion, and stress corrosion cracking (SCC) in temperatures up to 980°C. Its unique niobium-stabilized matrix enhances mechanical strength (760 MPa tensile strength, 45% elongation) and fatigue resistance, even in cryogenic conditions. Precision-engineered to ASTM B444, B704, and ASME SB444 standards, these tubes are ideal for aerospace, marine, and chemical processing applications where thermal stability and longevity are critical. From offshore drilling to nuclear reactors, Inconel 625 Tubing ensures reliability in the harshest operating environments.
Technical Specifications Table
| Property |
Details |
Standards |
| Chemical Composition |
Ni (58%), Cr (20-23%), Mo (8-10%), Nb (3.15-4.15%), Fe (≤5%) |
ASTM B444, B704, B705 |
| Physical Properties |
Density: 8.44 g/cm³; Melting Point: 1290-1350°C |
EN 2.4856, UNS N06625 |
| Mechanical Properties |
Tensile Strength: 760 MPa; Yield Strength: 345 MPa; Elongation: 45% |
ISO 6208 NiCr22Mo9Nb |
| Dimensions |
OD: 6-250 mm; Wall Thickness: 0.5-50 mm; Custom Fabrication Available |
ASME SB444, DIN 17744 |
| Certifications |
NACE MR0175, PED 2014/68/EU, DNV-GL, ABS, Lloyd’s Register |
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Key Applications of Inconel 625 Tubing
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Aerospace: Exhaust systems, turbine blades, and fuel lines resistant to jet engine thermal cycling.
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Marine Engineering: Subsea umbilicals, seawater cooling pipes, and offshore platform components.
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Chemical Processing: Acid production units, flue gas desulfurization (FGD) systems, and HCl storage.
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Nuclear Power: Reactor coolant channels and radioactive waste containment systems.
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Oil & Gas: Downhole instrumentation housings, sour gas pipelines, and LNG heat exchangers.
Inconel 625 Tubes & Pipes: Frequently Asked Questions
Q1: How does Inconel 625 outperform Inconel 600 in high-temperature oxidation?
A: The addition of molybdenum and niobium in Inconel 625 enhances its oxidation resistance at temperatures above 800°C, reducing scaling by 60% compared to Inconel 600.
Q2: Can Inconel 625 Tubing withstand sulfuric acid exposure?
A: Yes. It resists sulfuric acid up to 40% concentration at 70°C, with a corrosion rate of <0.1 mm/year, per ASTM G48 testing.
Q3: What post-weld heat treatment is required for Inconel 625 Pipes?
A: Solution annealing at 1095-1205°C followed by rapid quenching minimizes carbide precipitation and maintains corrosion resistance.
Q4: Are thin-walled Inconel 625 Tubes available for aerospace hydraulics?
A: We supply tubes with wall thickness down to 0.5 mm, precision-polished to Ra ≤0.8 μm for high-pressure fluid systems.
Q5: Does Inconel 625 resist chloride-induced stress corrosion cracking (CSCC)?
A: Exceptionally. Testing per ASTM G36 shows no CSCC failure after 720 hours in boiling 45% MgCl₂ solution.
Optimized Product Titles for Global Search Visibility
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Inconel 625 Seamless Tubes for Offshore Drilling Systems
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ASTM B444 Inconel 625 Pipes in Aerospace Exhaust Applications
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High-Temperature Inconel Alloy 625 Tubing for Chemical Reactors
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Corrosion-Resistant Inconel 625 Heat Exchanger Tubes
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Custom-Size Inconel 625 Pipes for Nuclear Coolant Channels
Why Choose Our Inconel 625 Solutions?
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Multi-Industry Compliance: Certified for aerospace (AMS 5599), oil & gas (API 5LC), and marine (NORSOK) standards.
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Advanced Fabrication: Laser welding, cold drawing, and CNC machining for complex geometries.
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Global Logistics: Stocked in UAE, Singapore, and Houston hubs; expedited delivery in 3-5 weeks.
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Technical Partnership: Metallurgists provide failure analysis, alloy selection guidance, and ASTM testing reports.
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High Strength Corrosion Resistance Inconel 625 Seamless Pipe For Extreme Environments Images
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