1. What are Incoloy, Inconel, and Nickel/Titanium alloys, and their key properties?
Answer:
Incoloy 800 / 825 / 840: Nickel-iron-chromium alloys with excellent high-temperature strength, resistance to oxidation, carburization, and stress corrosion cracking, widely used in chemical and industrial heating applications.
Inconel 600 / 625: Nickel-chromium alloys; Inconel 600 resists oxidation and corrosion, Inconel 625 has high strength and outstanding resistance to pitting and crevice corrosion.
Nickel-Titanium (NiTi) Alloy: Known for shape memory effect, superelasticity, and corrosion resistance, suitable for precision tubing and medical or specialized engineering applications.
2. What types of tubes are supplied?
Answer:
Welded electric heating tubes: Used in industrial heaters, boilers, and high-temperature furnaces
Seamless or welded precision tubes: High dimensional accuracy for specialized applications
Nickel/Titanium alloy tubes: Can be supplied polished or annealed for corrosion resistance and mechanical properties
Custom sizes: Outer diameters, wall thicknesses, and lengths can be tailored to project requirements
3. What industries typically use these heating tubes?
Answer:
Chemical & Petrochemical: High-temperature reactors, heating coils, and process piping
Energy & Power Generation: Boilers, heaters, and thermal exchangers
Industrial Heating: Electric heating elements, furnaces, and kilns
Aerospace & Defense: High-performance heat-resistant tubing
Medical & Electronics (NiTi): Specialized applications requiring corrosion resistance or shape memory properties
4. What are the benefits of using these alloys for welded heating tubes?
Answer:
High corrosion and oxidation resistance for long service life in harsh environments
High-temperature strength ensures stable performance in heating applications
Excellent weldability allows integration into heating systems
Precision and dimensional control for seamless operation and consistent heat distribution
Special properties of NiTi (shape memory and superelasticity) expand applications in medical or specialized equipment
5. How is quality ensured for these tubes?
Answer:
Chemical analysis to meet UNS or ASTM specifications
Mechanical testing: tensile, yield, elongation, and hardness
Non-destructive testing (NDT): ultrasonic, eddy current, or pressure testing for weld integrity
Dimensional inspection: OD, wall thickness, straightness, and roundness
Surface treatment inspection: pickled, polished, or annealed finishes to ensure corrosion resistance and smoothness
