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High Alloy Steel

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

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TryML00022 corrosion ML00045 brittle fracture ductile behavior fatigue hydrogen fracture embrittlement stress corrosion

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Application23

Subsea12 cases
Oil and Gas10 cases
Chemical Industry5 cases
Energy5 cases
FPSO5 cases
O&G Well Drilling4 cases
Offshore4 cases
Piping3 cases

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Heat Exchanger2 cases
Kitchen2 cases
Refinery2 cases
Ship2 cases
Siderurgy2 cases
Automotive1 case
Boiler1 case
Engine1 case
Lifting1 case
Mechanical Industry1 case
Petrochemical1 case
Pipeline1 case
Tool1 case
Valve1 case
Waste Heat Recovery Unit1 case

Microstructure37

Austenite25 cases
Duplex Ferritic Austenitic12 cases
Tempered Martensite7 cases
Austeno ferritic6 cases
Aged Martensite5 cases
Secondary carbides5 cases
Strain Hardened5 cases
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Martensite4 cases
Small amount of delta ferrite4 cases
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Anisotropy1 case
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Carburized Layer1 case
Coating Layer1 case
Cored Matrix1 case
Degradated1 case
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Fine Transgranular Precipitation1 case
Intragranular Intergranular Precipitates1 case
Martensite and Retained Austenite1 case
Martensitic with Delta Ferrite1 case
Needles1 case
Precipitation Hardened1 case
Small Amount of Delta Phase1 case
Sulfide Inclusions1 case
Surface layer of Thermal Spray1 case

Product48

Finished Product35 cases
Raw Material32 cases
Welded Joint13 cases
Fabrication Weld11 cases
Pipe7 cases
Bolt4 cases
Forging4 cases
Machined Part4 cases

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Standard98

UNS40 cases
ASTM29 cases
A28 cases
AISI15 cases
NF EN6 cases
1825 cases
3165 cases
ALLOY5 cases

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Condition35

Damage42 cases
Corrosion18 cases
Sound8 cases
High Temperature6 cases
Brittle Behavior5 cases
Fabrication Defect5 cases
Fatigue5 cases
Typical manufacturing5 cases

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Pitting Corrosion4 cases
Stress Corrosion4 cases
Heat Treatment Defect3 cases
Hydrogen3 cases
Hydrogen Embrittlement3 cases
Vibration Induced Fatigue3 cases
Welding3 cases
Brittle Behavior2 cases
Carburization2 cases
Creep2 cases
Intergranular Corrosion2 cases
Mechanical Fatigue2 cases
Removed From Service2 cases
Used2 cases
Bending1 case
Brittle Fracture1 case
Casting Defect1 case
Corrosion Fatigue1 case
Crevice1 case
Ductile Behavior1 case
Intergranular Cracking1 case
Lack of Sealing1 case
Not according to spec1 case
Preferential Dissolution1 case
Repair Defect1 case
Scaling1 case
Welding1 case

Atlas / Material / Ferrous Alloys / High Alloy Steel

Capture method: Naked Eye or Stereoscope ×Detail focus: Through Wall Cracking ×clear all

High Alloy Steel — sub-branches

Austenitic / Martensitic 1 Austenitic Stainless Steel 19 Duplex Stainless Steel 1 Ferritic Stainless Steel 2 Heat Resistant Steel 4 High Mn Austenitic Steel 1 Lean Duplex Stainless Steel 1 Martensitic Stainless Steel 10 Nickel Alloy Steel 1 Precipitation Hardened Stainless Steel 4 Super Duplex Stainless Steel 7 Wear Resistant Steel 1

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The macro section transverse to the welded region, show that the through wall cracking occurred in the pipe base metal, from the margin of the weld.

191

ML00006 / Apr.2017

Vibration Induced Fatigue in 304SS

M - Austenitic Stainless SteelP - Longitudinal Seam Welded PipeAp - PipingCd - Vibration Induced Fatigue

Cm - Macro Oxalic Acid Electrolytic EtchedDf - Through Wall Cracking

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