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ML00043 - Apr.2017

CuNi Condenser Tube

The micrography of the tube shows a granular structure and light deformation lines. No evidences of corrosion from the external surface (upper side of the figure) or internal surface (lower side of the figure).

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440
The of the shows a and light deformation lines. No evidences of from the (upper side of the figure) or (lower side of the figure).
M

Material

Cupronickel
  • ASTM B 111 C70600 H55
  • UNS C70600
Ds

Description

The was after several years operating in a condenser, to be characterized. No evidences were detected in this cold drawn seamless tube. The material is monophasic and reveals a light strain hardening.

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Chemistry (% in weight)

Product Analysis

87.80Cu; 0.02Zn; 1.45Fe; 10.02Ni; 0.01Pb; 0.51Mn.

Associated Images
The micrography of the tube shows a granular structure and light deformation lines. No evidences of corrosion from the external surface (upper side of the figure) or internal surface (lower side of the figure).
440
VIEW
ML00043 / Apr.2017
CuNi Condenser Tube
M - CupronickelP - Seamless tubeAp - Heat ExchangerCd - Removed From Service
Cm - FeCl3+HCl+H2O Etched MicroDf - Longitudinal Section
The material structure is monophasic.
110
VIEW
ML00043 / Apr.2017
CuNi Condenser Tube
M - CupronickelP - Seamless tubeAp - Heat ExchangerCd - Removed From Service
Cm - FeCl3+HCl+H2O Etched MicroDf - Single phase
The material structure is similar all through the thickness and there are no evidencies of corrosion at the surfaces.
89
VIEW
ML00043 / Apr.2017
CuNi Condenser Tube
M - CupronickelP - Seamless tubeAp - Heat ExchangerCd - Removed From Service
Cm - FeCl3+HCl+H2O solution Etched MacroDf - At the Surface
Detail of the structure at the surface.
79
VIEW
ML00043 / Apr.2017
CuNi Condenser Tube
M - CupronickelP - Seamless tubeAp - Heat ExchangerCd - Removed From Service
Cm - FeCl3+HCl+H2O Etched MicroDf - At the Surface