Nickel Alloy Pipe Fittings Inconel 625 UNS N06625 Heat-resistant Nickel-based

Chemical Composition

• Nickel (Ni): 58.0% - 63.0% (primary matrix element, providing excellent ductility and base corrosion resistance)
• Chromium (Cr): 20.0% - 23.0% (enhances high-temperature oxidation resistance and resistance to oxidizing media)
• Molybdenum (Mo): 8.0% - 10.0% (improves resistance to pitting, crevice corrosion and reducing environments)
• Niobium (Nb) + Tantalum (Ta): 3.15% - 4.15% (strengthens the alloy through solid solution and precipitation, enhancing high-temperature strength)
• Iron (Fe): Maximum 5.0% (aids in manufacturing and improves weldability)
• Carbon (C): Maximum 0.10% (minimized to prevent carbide precipitation and maintain corrosion resistance at high temperatures)
• Manganese (Mn): Maximum 0.50% (improves toughness and deoxidation during production)
• Silicon (Si): Maximum 0.50% (enhances casting fluidity without causing embrittlement)
• Sulfur (S): Maximum 0.015% (strictly controlled to ensure structural integrity and weld quality)

Core Functions

1. Fluid Distribution & Diversion: The equal tee structure enables efficient splitting of a single fluid stream into two uniform branches or combining two streams into one, ensuring balanced flow rate and pressure across all ports. This design is ideal for systems requiring consistent fluid distribution without pressure loss.
2. Structural Connection & High-Temperature Stability: It serves as a reliable connection node between pipes, ensuring tight, leak-proof joints even under extreme conditions. The high-temperature strength of Inconel 625 allows the tee to withstand long-term operation at temperatures up to 1093°C (2000°F), as well as high pressure and mechanical vibration, maintaining structural integrity without deformation or failure.

Application Scenarios

• Aerospace & Aviation: Piping systems for jet engines, aircraft fuel and hydraulic systems, where high-temperature and high-pressure resistance is essential.
• Oil & Gas Industry: Deep-sea oil and gas exploration, offshore drilling platforms, and downhole piping systems (as bimetallic composite pipe inner layer) that withstand harsh corrosive and high-pressure environments.
• Chemical & Petrochemical Industry: High-temperature reactors, catalytic cracking units, and pipelines conveying corrosive media such as acids, alkalis and organic solvents.
• Energy & Power: Nuclear power plant auxiliary systems, thermal power plant heat exchangers, and solar thermal power generation piping, where high-temperature stability and corrosion resistance are required.
• Marine Engineering: Shipbuilding, seawater desalination systems, and offshore structures, benefiting from the alloy’s excellent seawater corrosion resistance.

Key Advantages

• Exceptional Heat Resistance: Maintains stable mechanical properties and structural integrity at temperatures up to 1093°C, suitable for extreme high-temperature working conditions.
• Superior Corrosion Resistance: Excellent resistance to seawater, pitting, crevice corrosion, and both oxidizing and reducing media, ensuring long-term service in harsh corrosive environments.
• High Mechanical Strength: Boasts high tensile strength (minimum 827 MPa) and good ductility, capable of withstanding high pressure and mechanical vibration without deformation.
• Excellent Weldability: Compatible with standard welding methods (GTAW, GMAW, SMAW), facilitating on-site installation and maintenance while ensuring weld joint strength.
• Long Service Life: With outstanding durability and resistance to harsh conditions, the service life can reach 30-40 years in appropriate working environments, reducing maintenance costs and downtime for enterprises.