Heat Resistant Steel

3 cases · 5 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Capture method: Naked Eye or Stereoscope Detail focus: Sampling and Analysis clear all

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This macrography shows a longitudinal section of the tubular cast fitting. The external side is to the top and the internal side to the bottom. The buttering layer is evident in the groove that would be welded to the centrifugall cast tube (right side) and part of the ID and OD. During the buttering welding of the casting the cracks were not detected because they were formed in the center of the thickness and some have propagated to the internal diameter, but not to the external diameter. They opened only when the buttered casting was welded to the tube.
21
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched MacroDf - Longitudinal Section
The macrography of a longitudinal section shows that the tube did not present local thinning in any region, but the internal and external scales are evidenced. The external surface (OD) is to the top of the figure and the internal surface (ID) is to the bottom of the figure.
124
VIEW
ML00107 / Dec.2017
Carburized 9Cr1MoV Superheater Tube
M - Heat Resistant SteelP - Seamless tubeAp - BoilerCd - Carburization
Cm - NItal Etched MacroDf - Longitudinal Section
Macrography of the NEW TUBE, centrifugally cast, in the transverse section, presenting columnar grains close to the external surface.
50
VIEW
ML00038 / Apr.2017
Cast SS Tube for High Temperature Service
M - Heat Resistant SteelP - Centrifugally Cast PipeAp - SiderurgyCd - Creep
Cm - Kalling Etched MacroDf - Transverse Section

More from these cases

ML00173 — Welding Cracks in an Aged HP Cast FittingM - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Welding Cracks in an Aged HP Cast Fitting
1
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched MacroDf - Microhardness identations
ML00038 — Cast SS Tube for High Temperature ServiceM - Heat Resistant SteelP - Centrifugally Cast PipeAp - SiderurgyCd - Creep
Macrography of the TUBE REMOVED FROM SERVICE, centrifugally cast, in the transverse section, presenting thickness loss and macrostructure deterioration.
33
VIEW
ML00038 / Apr.2017
Cast SS Tube for High Temperature Service
M - Heat Resistant SteelP - Centrifugally Cast PipeAp - SiderurgyCd - Creep
Cm - Kalling Etched MacroDf - Transverse Section