Microalloyed Steel

2 cases · 15 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Capture method: Optical Microscope clear all

Results

SortNewestOldestTitle A-ZTitle Z-A
The micrography of the pipe in the longitudinal section shows an aligned structure.
60
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - Nital Etched Micrography by OMDf - Base Metal
Longitudinal section of the fitting in the center of the thickness (2"). Refined ferritic structure.
370
VIEW
ML00030 / Jan.2017
Forging for High Pressure Application
M - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Bainitic Ferrite

More from these cases

ML00053 — SAW Longitudinal Seam of X70 PipeM - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Detail of the microstructure in the center of the plate, in the longitudinal section. The structure is refined and presents different ferritic grain sizes.
49
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - Nital Etched Micrography by OMDf - Base Metal
Detail of the microstructure in the center of the plate, in the longitudinal section. The ferritic structure is refined and presents different grain sizes. Carbides are presented in different morphologies (perlite, precipitated) and there are probably microphases (aligned in a central segregation line).
55
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - Nital Etched Micrography by OMDf - Base Metal
Micrographic detail of the fusion line of the second pass (not reheated). The HAZ is bainitic and the weld metal microstructure is predominantly formed by acicular ferrite.
51
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - Nital Etched Micrography by OMDf - Fusion Line
Center of the weld in the second pass. Columnar grains of the previous austenite.
45
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - Nital Etched Micrography by OMDf - Weld Metal
Fusion line of the first pass (reheated in high temperature). The HAZ is bainitic and the weld metal microstructure is predominantly formed by acicular ferrite.
43
VIEW
ML00053 / Mar.2017
SAW Longitudinal Seam of X70 Pipe
M - Microalloyed SteelP - Longitudinal Seam Welded PipeAp - SubseaCd - Welding
Cm - Nital Etched Micrography by OMDf - Fusion Line

+6 more from this case →

ML00030 — Forging for High Pressure ApplicationM - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Longitudinal section of the fitting in the center of the thickness (2"). Refined ferritic structure.
67
VIEW
ML00030 / Jan.2017
Forging for High Pressure Application
M - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Grain refined structure
Longitudinal section of the fitting in the center of the thickness (2"). Refined ferritic structure.
63
VIEW
ML00030 / Jan.2017
Forging for High Pressure Application
M - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Grain refined structure