4130

3 cases · 4 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Capture method: Optical Microscope Detail focus: Base Metal clear all

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Low magnification micrography of the pin in the center of the 25 mm thickness. Ferritic-pearlitic structure of the material that slowly cooled after spray and fuse application. Transverse section.
25
VIEW
ML00110 / Jan.2018
Non Conformance in Spray and Fuse Pin
M - Low Alloy Medium Carbon QTP - Tubular ForgingAp - O&G Well DrillingCd - Heat Treatment Defect
Cm - Nital Etched Micrography by OMDf - Base Metal
Low magnification micrography of the pin in the center of the 25 mm thickness. Bainitic structure of the material that was quenched and tempered after spray and fuse application. Transverse section presenting a uniform structure.
13
VIEW
ML00109 / Jan.2018
Thermal Spray and Fuse Layer in Forged Pin
M - Low Alloy Medium Carbon QTP - Tubular ForgingAp - O&G Well DrillingCd - Thermal spray
Cm - Nital Etched Micrography by OMDf - Base Metal
Micrography of the 4130 steel, normalized and tempered. The structure is sligthly banded (segregated) and the average hardness level is 20 HRc.
92
VIEW
ML00102 / May.2018
AISI 4130 Forging Welded and Overlaid
M - Low Alloy SteelP - CladdingAp - Oil and GasCd - Welding
Cm - Nital Etched Micrography by OMDf - Base Metal

More from these cases

ML00102 — AISI 4130 Forging Welded and OverlaidM - Low Alloy SteelP - CladdingAp - Oil and GasCd - Welding
Micrography of the 4130 steel, normalized and tempered. The microstructure is bainitic.
88
VIEW
ML00102 / May.2018
AISI 4130 Forging Welded and Overlaid
M - Low Alloy SteelP - CladdingAp - Oil and GasCd - Welding
Cm - Nital Etched Micrography by OMDf - Base Metal