Monel 400 Heat Exchanger Tube ASME SB163 UNS N04400 Nickel Alloy Seamless U Bend Tube

Monel 400 Heat Exchanger Tube ASME SB163 UNS N04400 Nickel Alloy Seamless U Bend Tube

ASME SB163 UNS N04400 Seamless U Bend Tube, also known as”Monel 400 seamless U bend heat exchanger tube”, is cold-formed U-shaped seamless nickel-copper alloy tube manufactured in accordance with ASME SB163 (equivalent to ASTM B163) standard. This specification governs seamless nickel alloy tubes for condensers, heat exchangers and other heat-transfer equipment. UNS N04400 (Monel 400) is a solid-solution nickel alloy with high nickel content. Straight seamless base tubes are produced by hot extrusion and cold drawing, then cold bent into U-shape for heat exchanger bundle assembly. Post-bending-stress-relief or full annealing is normally performed to eliminate residual bending stress and restore corrosion resistance and ductility. The U-bend configuration removes the requirement for expansion joints, absorbs thermal expansion‑contraction inside shell and tube heat exchangers, and is widely used under corrosive process conditions.

Different Surface Finishes:

Pickled And Annealed

Bright Annealed

Mechanically Polished

Chemical Composition:

Main Features:

Excellent Corrosion Resistance

Good Erosion-Corrosion Resistance

Good Ductility & Formability

U-bend Structural Advantage

Homogeneous Single-phase Alloy Microstructure

High Thermal Conductivity

Resistance to Pitting and Crevice Corrosion

Ease of Fabrication

Different Applications:

Power Generation industry

Marine & Offshore Engineering

Desalination Plants

Chemical Processing Industry

Petrochemical Industry

Oil & Gas Industry

Aerospace Industry