Ferrous Alloys

6 cases · 16 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Ferritic Capture method: Naked Eye or Stereoscope clear all

Ferrous Alloys — sub-branches

Carbon Steel 5High Alloy Steel 2Low Alloy Steel 3

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The metallic part of the fork handle is about 9mm wide. It was cut in a transverse section and the profile is shown in this figure. The thickness is 1mm and the curvature depth is about 3mm.
86
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Transverse Section AspectDf - Formed Profile
Macrography of a transverse section of the 8" pipe, cut exactly in the middle of the lateral 2" branch line, showing the through thickness crack initiated at the margin of the weld, in the upper part of the pipe.
64
VIEW
ML00149 / Dec.2018
Vibration Induced Fatigue in a Gas Piping
M - Low Carbon SteelP - Piping spoolAp - FPSOCd - Vibration Induced Fatigue
Cm - NItal Etched MacroDf - Welded Joint
Macrography of the welded joint taken from the vertical up part of the joint, presenting the root in one pass, the fill of the joint in three passes, the cap in three passes and two temper bead passes. The 10" diameter tube, 9.5mm thick, was welded by GTAW in the root (80SD2 filler metal) and by SMAW for fill, cap and temper bead passes (10018-D2 filler metal).
79
VIEW
ML00129 / Apr.2018
Non qualified WPS for High Strength Steel
M - Low Alloy Medium Carbon QTP - Welded Testpiece for QualificationAp - Oil and GasCd - Non qualified
Cm - NItal Etched MacroDf - Welded Joint
Macrography showing the different regions of a pipe-to-plate fillet weld. See the schematic drawing in the next image
954
VIEW
ML00052 / Apr.2017
Cold Cracks in API 5CT L80 Tube Welded to a Structural Part
M - Low Alloy SteelP - Seamless tubeAp - OffshoreCd - Welding Defect
Cm - NItal Etched MacroDf - Fracture
Macrography of the typical welded joint between the superior plate (8mm) and the inferior plate (12 mm) using one SAW fillet. The superior plate is welded in the thickness and the inferior plate is welded at the surface in this overlap joint. See the schematic drawing in the next figure
95
VIEW
ML00069 / May.2017
Liquation Cracks in SAW of Low Carbon Steel
M - Low Carbon SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
Cm - NItal Etched MacroDf - Welded Joint
Macrography of the joint welded by SAW process in overlap geometry, between the 8 mm low carbon steel plate (superior) and the 12 mm C-Mn steel plate (inferior).
70
VIEW
ML00067 / May.2017
Cold Cracks in C-Mn SAW Weld Metal
M - CMn SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
Cm - NItal Etched MacroDf - Welded Joint

More from these cases

ML00151 — Ferritic Stainless Steel of a Flatware ForkM - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
The fork scoop is about 53 wide and there is a transition to the handle that is 9mm wide. Exactly at that transition the fork was cut in a longitudinal section and the profile is shown in this figure. The thickness is 1mm and the curvatures of the scoop and handle are in different directions, 3mm depth concave in the handle and 10 mm depth convex in the scoop.
54
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Longitudinal Section AspectDf - Formed Profile
Aspect of the cut surface of the fork tooth in the scoop. The thickness is 1 mm and the fabrication finishing of the surface is polished. The tooth in the center was cut for analysis in the longitudinal section.
33
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Surface AspectDf - Cut Surface
ML00149 — Vibration Induced Fatigue in a Gas PipingM - Low Carbon SteelP - Piping spoolAp - FPSOCd - Vibration Induced Fatigue
Macrography of the 8" pipe, welded to a 2" fitting (weldolet), welded to a 2" flange. The branch line was operating in this position (horizontal line with a lateral branch) and the through thickness fatigue crack is associated to the margin of the weld in the upper part of the pipe.
50
VIEW
ML00149 / Dec.2018
Vibration Induced Fatigue in a Gas Piping
M - Low Carbon SteelP - Piping spoolAp - FPSOCd - Vibration Induced Fatigue
Cm - NItal Etched MacroDf - Cracking
Macrography of a section tranverse to the pipe and to the weld between the 8"pipe and the 2" fitting weldolet. The crack starts exactly at the margin of the weld, in a geometric stress concentration raiser, in a position where it growths in the pipe longitudinal direction, and propagates in a straight line, not related to any metallurgical aspect.
41
VIEW
ML00149 / Dec.2018
Vibration Induced Fatigue in a Gas Piping
M - Low Carbon SteelP - Piping spoolAp - FPSOCd - Vibration Induced Fatigue
Cm - NItal Etched MacroDf - Margin of the Weld Crack
Macrography of a section tranverse to the pipe and to the weld between the 8"pipe and the 2" fitting weldolet. The crack starts exactly at the margin of the weld, in a geometric stress concentration raiser, in a position where it growths in the pipe longitudinal direction, and propagates in a straight line, not related to any metallurgical aspect.
33
VIEW
ML00149 / Dec.2018
Vibration Induced Fatigue in a Gas Piping
M - Low Carbon SteelP - Piping spoolAp - FPSOCd - Vibration Induced Fatigue
Cm - NItal Etched MacroDf - Fatigue Crack
ML00052 — Cold Cracks in API 5CT L80 Tube Welded to a Structural PartM - Low Alloy SteelP - Seamless tubeAp - OffshoreCd - Welding Defect
Macrography of the fillet welded joint between the 3" ND tube and the 3/4" thick plate. See the schematic drawing in the next figure
56
VIEW
ML00052 / Apr.2017
Cold Cracks in API 5CT L80 Tube Welded to a Structural Part
M - Low Alloy SteelP - Seamless tubeAp - OffshoreCd - Welding Defect
Cm - NItal Etched MacroDf - Welded Joint
ML00069 — Liquation Cracks in SAW of Low Carbon SteelM - Low Carbon SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
The macrography presents the position of the fracture in the superior plate (8 mm thickness).
61
VIEW
ML00069 / May.2017
Liquation Cracks in SAW of Low Carbon Steel
M - Low Carbon SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
Cm - NItal Etched MacroDf - Fracture
The macrography presents the position of the fracture in the fillet weld side.
67
VIEW
ML00069 / May.2017
Liquation Cracks in SAW of Low Carbon Steel
M - Low Carbon SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
Cm - NItal Etched MacroDf - Fracture
ML00067 — Cold Cracks in C-Mn SAW Weld MetalM - CMn SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
Macrography of the welded joint in a non cracked region.
57
VIEW
ML00067 / May.2017
Cold Cracks in C-Mn SAW Weld Metal
M - CMn SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
Cm - NItal Etched MacroDf - Welded Joint
Macrography of the welded joint in a cracked region.
49
VIEW
ML00067 / May.2017
Cold Cracks in C-Mn SAW Weld Metal
M - CMn SteelP - Fabrication WeldAp - AutomotiveCd - Welding Defect
Cm - NItal Etched MacroDf - Welded Joint