1. What is Inconel 625 and Monel 400, and what are their key properties?
Answer:
Inconel 625 (UNS N06625 / No6625): Nickel-chromium-molybdenum alloy known for high strength, excellent corrosion resistance, and oxidation resistance at elevated temperatures. Suitable for chemical, marine, and aerospace applications.
Monel 400 (UNS N04400): Nickel-copper alloy with excellent resistance to seawater and corrosion in acidic environments, good mechanical properties, and excellent weldability.
2. What types of tubes are available?
Answer:
Seamless precision tubes: High dimensional accuracy and smooth surface finish
Electropolished / polished tubes: Smooth, bright surface for sanitary, chemical, or aerospace applications
Bright annealed tubing: Annealed in a controlled atmosphere to improve ductility, corrosion resistance, and surface finish
Available in custom lengths, diameters, and wall thicknesses
3. What industries use these tubes?
Answer:
Chemical & Petrochemical: High-purity fluid transport and corrosive media
Pharmaceutical & Food: Sanitary tubing for hygienic processes
Aerospace & Defense: Engine components, hydraulic systems
Marine & Offshore: Seawater piping, desalination, and subsea systems
Energy & Power Generation: Heat exchangers, gas turbines, and high-temperature piping
4. What are the advantages of electropolished and bright annealed finishes?
Answer:
Electropolishing: Removes microscopic surface imperfections, reduces bacterial growth, improves corrosion resistance, and enhances aesthetic appearance
Bright annealing: Restores ductility, reduces residual stresses, and produces a shiny, smooth surface suitable for precision applications
Both finishes are ideal for clean environments and high-purity applications
5. How is quality ensured for these precision tubes?
Answer:
Chemical composition verification: To meet UNS N06625 / N04400 standards
Mechanical testing: Tensile, yield, elongation, and hardness
Dimensional inspection: OD, wall thickness, straightness, and roundness
Surface inspection: Free from pits, scratches, or defects
Non-destructive testing (NDT): Ultrasonic or eddy current inspection for seamless tubes
