Monel® 400 Tube

Monel® 400 Tube is a nickel-copper alloy tube prized for its excellent resistance to seawater, hydrofluoric acid, and alkalis, while retaining mechanical toughness and stability under a wide range of temperatures. Its tubular configuration provides structural integrity and flow efficiency, making it indispensable in heat exchangers, petrochemical systems, and marine environments. The alloy’s strength, combined with its ability to resist stress-corrosion cracking, enhances its reliability in high-pressure and corrosive applications. Specific uses include condenser and heat exchanger tubing in chemical plants, seawater piping in marine engineering, and high-integrity components in power generation systems. Research into Monel 400 tubes highlights their behavior under stress-corrosion cracking conditions, their response to heat treatment for microstructural refinement, and their adaptability in specialized designs such as vacuum and spectrometer tubing. The combination of resilience, corrosion resistance, and adaptability underscores the role of Monel® 400 Tubes as a critical material in both industrial infrastructure and advanced research contexts.

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Tolerance

Properties

Reference & Citations

Health hazard/Hazardous to the ozone layer

Serious health hazard

each

Tolerances

Tube

Outside Diameter	=<2mm	±0.05mm
Outside Diameter	2mm - 5mm	±0.1mm
Outside Diameter	>5mm	±5%
Wall Thickness		±10%

Material Properties for Alloys

Mechanical Properties

Element	Value
Hardness - Brinell	125-190
Elongation at break( % )	<40
Modulus of elasticity( GPa )	185
Izod impact strength( J m⁻¹ )	110-140
Tensile strength( MPa )	550-950

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	48-51
Temperature coefficient( K⁻¹ )	0.0019

Thermal Properties

Element	Value
Maximum use temperature in air( C )	450
Melting point( C )	1300-1350
Thermal conductivity( W m⁻¹ K⁻¹ )	21.7@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	13.9-14.1@20-100°C