MetalX Nickel Alloys

Incoloy 800HT Flanges

SpecificationDetails
Product NameIncoloy 800HT Flanges
Material GradeIncoloy 800HT / Alloy 800HT
UNS DesignationUNS N08811
Werkstoff NumberW.Nr. 1.4959
Material TypeNickel-Iron-Chromium Alloy
Chemical CompositionNickel, Iron and Chromium as principal elements, with controlled Carbon, Aluminium and Titanium
Flange TypeWeld Neck / Slip-On / Blind / Socket Weld / Threaded / Lap Joint / Orifice Flanges
Manufacturing TypeForged / Hot Forged / Precision Machined
Flange StandardASTM B564 / ASME SB564, as applicable
Dimensional StandardASME B16.5 / ASME B16.47, as applicable
Size1/2″ to 24″ or As per Customer Requirement
Pressure ClassClass 150 / 300 / 600 / 900 / 1500 / 2500, as applicable
Connection TypeFlanged Connection
Facing TypeRaised Face / Flat Face / Ring Type Joint, as applicable
Bore TypeStandard Bore / Heavy Bore / Customized Bore
Surface FinishMachined / Polished / As Specified
Heat TreatmentSolution Annealed / Stabilized / As per Applicable Material Specification
DimensionsAs per ASME B16.5 / ASME B16.47 and Customer Requirements
MTCEN 10204 3.1 / 3.2
TestingChemical / Mechanical / Dimensional / Hardness / Visual / PMI and Other Tests as Required
Tensile StrengthAs per Applicable Incoloy 800HT Material Specification and Condition
Yield StrengthAs per Applicable Incoloy 800HT Material Specification and Condition
ElongationAs per Applicable Material Standard
DensityApproximately 7.94 g/cm³
Melting RangeApproximately 1350–1400°C
Corrosion ResistanceExcellent resistance to oxidation and carburization in high-temperature environments
Pitting ResistanceGood resistance to localized corrosion under suitable service conditions
Crevice Corrosion ResistanceGood resistance under suitable service conditions
Chloride ResistanceGood resistance to chloride-containing environments under suitable conditions
Stress-Corrosion ResistanceGood resistance to stress-corrosion cracking under suitable service conditions
Acid ResistanceGood resistance to selected organic and inorganic acids
Oxidation ResistanceExcellent resistance to oxidation at elevated temperatures
Carburization ResistanceExcellent resistance to carburization and nitridation in suitable high-temperature environments
High-Temperature PerformanceExcellent high-temperature strength, creep resistance and stress-rupture performance
WeldingSuitable for welding using appropriate nickel-alloy welding procedures
FabricationSuitable for machining, forming and specialized fabrication using appropriate procedures
Dimensional AccuracyPrecision dimensions according to applicable ASME standards
Available FormsWeld Neck / Slip-On / Blind / Socket Weld / Threaded / Lap Joint / Orifice Flanges
CustomizationSize, Flange Type, Pressure Class, Facing, Bore, Dimensions, Finish, Testing and Documentation
InspectionDimensional, Visual and Material Inspection as Required
MarkingSize, Grade, Standard, Class, Facing and Heat/Batch Identification as Applicable
OriginEuropean / American / Japanese / Korean and Other Approved Origins
Export SupplyWorldwide Incoloy 800HT Flanges Export Supply
Exporter SupportTechnical Specifications, Inspection, Certification, Export Packing, Documentation and International Shipment Coordination
ApplicationsHeat Treatment Equipment, Furnace Components, Petrochemical, Chemical Processing, Power Generation, Heat Exchangers, Industrial Heating Equipment and High-Temperature Process Piping

1. Most Common Types of Incoloy 800HT Flanges

TypeDetails
Incoloy 800HT Weld Neck FlangeDesigned for high-temperature and high-pressure piping systems requiring strong welded connections and excellent creep and stress-rupture performance.
Incoloy 800HT Slip-On FlangeFits over the pipe and is welded in position for suitable industrial piping applications.
Incoloy 800HT Blind FlangeUsed to close pipe ends, equipment nozzles, vessels and other openings in high-temperature systems.
Incoloy 800HT Socket Weld FlangeSuitable for smaller-diameter piping systems requiring a compact socket weld connection.
Incoloy 800HT Threaded FlangeProvides a threaded connection where welding may not be preferred, subject to application requirements.
Incoloy 800HT Lap Joint FlangeUsed with a compatible stub end where frequent assembly and disassembly may be required.
Incoloy 800HT Orifice FlangeUsed in flow measurement systems requiring an orifice plate arrangement.
Incoloy 800HT Ring Type Joint FlangeFeatures an RTJ facing for demanding pressure and temperature applications.
Incoloy 800HT Raised Face FlangeProvides a raised sealing surface for suitable gasketed piping and equipment connections.
Incoloy 800HT Flat Face FlangeFeatures a flat sealing surface for applications requiring this facing configuration.
Customized Incoloy 800HT FlangeManufactured according to customer drawings, dimensions, pressure class, facing, bore, testing and documentation requirements.

2. Incoloy 800HT Flanges – Technical Specifications

SpecificationDetails
Product NameIncoloy 800HT Flanges
Material GradeIncoloy 800HT / Alloy 800HT
UNS DesignationUNS N08811
Werkstoff NumberW.Nr. 1.4959
Material TypeNickel-Iron-Chromium Alloy
Chemical CompositionNickel, Iron and Chromium as principal alloying elements, with controlled Carbon, Aluminium and Titanium
Flange TypeWeld Neck / Slip-On / Blind / Socket Weld / Threaded / Lap Joint / Orifice Flanges
Manufacturing TypeForged / Hot Forged / Precision Machined
Flange StandardASTM B564 / ASME SB564, as applicable
Dimensional StandardASME B16.5 / ASME B16.47, as applicable
Size1/2″ to 24″ or As per Customer Requirement
Pressure ClassClass 150 / 300 / 600 / 900 / 1500 / 2500, as applicable
Connection TypeFlanged Connection
Facing TypeRaised Face / Flat Face / Ring Type Joint, as applicable
Bore TypeStandard Bore / Heavy Bore / Customized Bore
Surface FinishMachined / Polished / As Specified
Heat TreatmentSolution Annealed / Stabilized / As per Applicable Material Specification
DimensionsAs per ASME B16.5 / ASME B16.47 and Customer Requirements
MTCEN 10204 3.1 / 3.2
TestingChemical / Mechanical / Dimensional / Hardness / Visual / PMI and Other Tests as Required
Tensile StrengthAs per Applicable Incoloy 800HT Material Specification and Condition
Yield StrengthAs per Applicable Incoloy 800HT Material Specification and Condition
ElongationAs per Applicable Material Standard
DensityApproximately 7.94 g/cm³
Melting RangeApproximately 1350–1400°C
Corrosion ResistanceGood resistance to corrosion in demanding high-temperature process environments
Pitting ResistanceGood resistance to localized corrosion under suitable service conditions
Crevice Corrosion ResistanceGood resistance under suitable service conditions
Chloride ResistanceGood resistance to chloride-containing environments under suitable conditions
Stress-Corrosion ResistanceGood resistance to stress-corrosion cracking under suitable service conditions
Acid ResistanceGood resistance to selected organic and inorganic acids
Oxidation ResistanceExcellent resistance to oxidation at elevated temperatures
Carburization ResistanceExcellent resistance to carburization in suitable high-temperature environments
Nitridation ResistanceGood resistance to nitridation under suitable service conditions
High-Temperature PerformanceExcellent high-temperature strength, creep resistance and stress-rupture performance
WeldingSuitable for welding using appropriate nickel-alloy welding procedures
FabricationSuitable for machining, forming and specialized fabrication using appropriate procedures
Dimensional AccuracyPrecision dimensions according to applicable ASME standards
Available FormsWeld Neck / Slip-On / Blind / Socket Weld / Threaded / Lap Joint / Orifice Flanges
CustomizationSize, Flange Type, Pressure Class, Facing, Bore, Dimensions, Finish, Testing and Documentation
InspectionDimensional, Visual and Material Inspection as Required
MarkingSize, Grade, Standard, Class, Facing and Heat/Batch Identification as Applicable
OriginEuropean / American / Japanese / Korean and Other Approved Origins
Export SupplyWorldwide Incoloy 800HT Flanges Export Supply
Exporter SupportTechnical Specifications, Inspection, Certification, Export Packing, Documentation and International Shipment Coordination
ApplicationsHeat Treatment Equipment, Furnace Components, Petrochemical, Chemical Processing, Power Generation, Heat Exchangers, Industrial Heating Equipment and High-Temperature Process Piping

3. Incoloy 800HT Flanges – Supply & Quality Details

ParameterDetails
Material IdentificationIncoloy 800HT / Alloy 800HT / UNS N08811 / W.Nr. 1.4959
Flange ConfigurationsWeld Neck / Slip-On / Blind / Socket Weld / Threaded / Lap Joint / Orifice
Size Range1/2″ to 24″ or As per Requirement
Pressure ClassesClass 150 / 300 / 600 / 900 / 1500 / 2500
ManufacturingForged / Hot Forged / Precision Machined
Applicable StandardsASTM B564 / ASME SB564 and ASME B16.5 / B16.47, as applicable
Facing OptionsRaised Face / Flat Face / Ring Type Joint
Bore OptionsStandard Bore / Heavy Bore / Customized Bore
Surface FinishMachined / Polished / As Specified
Heat TreatmentSolution Annealed / Stabilized / As Required
TestingChemical / Mechanical / Dimensional / Hardness / Visual / PMI / Other Tests
InspectionDimensional, Visual and Material Inspection
CertificationEN 10204 3.1 / 3.2
MarkingSize, Grade, Standard, Class, Facing and Heat/Batch Identification
Material TraceabilityHeat Number and Batch Identification as Applicable
CustomizationSize, Flange Type, Pressure Class, Facing, Bore, Dimensions, Finish, Testing and Documentation
PackagingExport-Worthy Wooden Cases, Boxes, Pallets or Customized Packaging
DocumentationMTC, Inspection Reports, Test Certificates and Other Documents as Required
Export SupplyWorldwide Incoloy 800HT Flanges Supply
ApplicationsHeat Treatment, Furnace Equipment, Petrochemical, Chemical Processing, Power Generation, Heat Exchangers, Industrial Heating Equipment and High-Temperature Process Piping

Most Common Types Of Incoloy 800HT Flanges

TypeDetails
Incoloy 800HT Weld Neck FlangeDesigned for high-temperature and high-pressure piping systems requiring strong welded connections and excellent creep and stress-rupture performance.
Incoloy 800HT Slip-On FlangeFits over the pipe and is welded in position for suitable industrial piping applications.
Incoloy 800HT Blind FlangeUsed to close pipe ends, equipment nozzles, vessels and other openings in high-temperature process systems.
Incoloy 800HT Socket Weld FlangeSuitable for smaller-diameter piping systems requiring a compact and secure socket weld connection.
Incoloy 800HT Threaded FlangeProvides a threaded connection where welding may not be preferred, subject to application requirements.
Incoloy 800HT Lap Joint FlangeUsed with a compatible stub end where frequent assembly and disassembly may be required.
Incoloy 800HT Orifice FlangeUsed in flow measurement systems requiring an orifice plate arrangement.
Incoloy 800HT Ring Type Joint FlangeFeatures an RTJ facing for demanding pressure and temperature applications.
Incoloy 800HT Raised Face FlangeProvides a raised sealing surface for suitable gasketed piping and equipment connections.
Incoloy 800HT Flat Face FlangeFeatures a flat sealing surface for applications requiring this facing configuration.
Customized Incoloy 800HT FlangeManufactured according to customer drawings, dimensions, pressure class, facing, bore, testing and documentation requirements.
Why Should You Buy Incoloy 800HT Flanges from Metalx Nickel & Alloys?
  • Experienced Incoloy 800HT Flanges Supplier & Exporter serving international buyers, importers, distributors, EPC contractors, stockholders, traders and industrial end users.
  • 20+ Years of Nickel Alloy Industry Experience in supplying and exporting corrosion-resistant, high-temperature and specialty alloy products to customers across the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Africa, Europe, Asia and other global markets.
  • Specialized Incoloy 800HT Flanges Exporter offering Incoloy 800HT / Alloy 800HT / UNS N08811 / W.Nr. 1.4959 Flanges according to applicable international standards and customer requirements.
  • Global Incoloy 800HT Sourcing Network with access to reputed nickel alloy mills, manufacturers, authorized suppliers and approved stockholders across the USA, Europe, Japan, South Korea and other major international supply markets.
  • Reliable Incoloy 800HT Flanges Supplier providing nickel-iron-chromium alloy flanges for demanding applications requiring excellent high-temperature strength, creep and stress-rupture resistance, oxidation resistance, carburization resistance and reliable mechanical stability.
Key FeatureDetails
High-Temperature StrengthIncoloy 800HT retains useful mechanical strength at elevated temperatures, making it suitable for demanding heat-related applications.
Excellent Oxidation ResistanceProvides good resistance to oxidation during prolonged exposure to elevated-temperature environments.
Carburization ResistanceOffers good resistance to carburizing conditions, supporting industrial heating and furnace-related applications.
Creep ResistanceProvides improved resistance to deformation during prolonged high-temperature service.
Stress-Rupture StrengthSuitable for applications where resistance to stress rupture is important during extended elevated-temperature operation.
High-Temperature StabilityMaintains reliable mechanical performance under demanding thermal conditions.
Corrosion ResistanceProvides good corrosion resistance in suitable industrial and process environments.
Multiple Flange TypesAvailable in Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint and Orifice configurations.
Multiple Pressure ClassesAvailable in Class 150, 300, 600, 900, 1500 and 2500, subject to applicable requirements.
Facing OptionsRF, FF, RTJ and other specified facing configurations can be supplied.
Dimensional AccuracyPrecision-machined dimensions support proper pipe and equipment fit-up.
Custom ManufacturingSize, pressure rating, flange configuration, facing, bore, dimensions, finish, testing and documentation can be customized.
Inspection & DocumentationDimensional, visual, material and other required inspections can be arranged with applicable documentation.
Industrial ReliabilitySuitable for high-temperature piping, thermal processing, furnace equipment and other demanding industrial applications.
SpecificationDetails
Product NameIncoloy 800HT Flanges
Material GradeIncoloy 800HT / Alloy 800HT
UNS DesignationUNS N08811
Werkstoff NumberW.Nr. 1.4959
Material TypeNickel-Iron-Chromium Alloy
Chemical CompositionNickel, Iron and Chromium as principal alloying elements, with controlled Carbon, Aluminium and Titanium
Flange TypeWeld Neck / Slip-On / Blind / Socket Weld / Threaded / Lap Joint / Orifice Flanges
Manufacturing TypeForged / Hot Forged / Precision Machined
Flange StandardASTM B564 / ASME SB564, as applicable
Dimensional StandardASME B16.5 / ASME B16.47, as applicable
SizeAs per applicable standard and customer requirement
Pressure ClassClass 150 / 300 / 600 / 900 / 1500 / 2500, as applicable
Connection TypeFlanged Connection
Connection MethodButt Weld / Socket Weld / Threaded / Bolted, depending on flange type
Facing TypeRaised Face (RF) / Flat Face (FF) / Ring Type Joint (RTJ) / Other specified facings
Bore TypeStandard Bore / Heavy Bore / Customized Bore
Surface FinishMachined / Polished / As per Customer Requirement
Heat TreatmentSolution Annealed / Stabilized / As per Applicable Material Specification
DimensionsAs per ASME B16.5 / ASME B16.47 and Customer Requirements
MTCEN 10204 3.1 / 3.2
TestingChemical / Mechanical / Dimensional / Hardness / Visual / PMI and Other Tests as Required
Tensile StrengthAs per Applicable Incoloy 800HT Material Specification and Condition
Yield StrengthAs per Applicable Incoloy 800HT Material Specification and Condition
ElongationAs per Applicable Material Standard
DensityApproximately 7.94 g/cm³
Melting RangeApproximately 1350–1400°C
Corrosion ResistanceGood resistance to corrosion in demanding high-temperature process environments
Pitting ResistanceGood resistance to localized corrosion under suitable service conditions
Crevice Corrosion ResistanceGood resistance under suitable service conditions
Chloride ResistanceGood resistance to chloride-containing environments under suitable conditions
Stress-Corrosion ResistanceGood resistance to stress-corrosion cracking under suitable service conditions
Acid ResistanceGood resistance to selected organic and inorganic acids
Oxidation ResistanceExcellent resistance to oxidation at elevated temperatures
Carburization ResistanceExcellent resistance to carburization in suitable high-temperature environments
Nitridation ResistanceGood resistance to nitridation under suitable service conditions
High-Temperature PerformanceExcellent high-temperature strength, creep resistance and stress-rupture performance
WeldingSuitable for welding using appropriate nickel-alloy welding procedures
FabricationSuitable for machining, forming and specialized fabrication using appropriate procedures
Dimensional AccuracyPrecision dimensions according to applicable ASME standards
Available FormsWeld Neck / Slip-On / Blind / Socket Weld / Threaded / Lap Joint / Orifice Flanges
CustomizationSize, Flange Type, Pressure Class, Facing, Bore, Dimensions, Finish, Testing and Documentation
InspectionDimensional, Visual and Material Inspection as Required
MarkingGrade, Size, Standard, Pressure Class, Facing and Heat/Lot Details as Applicable
OriginEuropean / American / Japanese / Korean and Other Approved Origins
Export SupplyWorldwide Incoloy 800HT Flanges Export Supply
Exporter SupportTechnical Specifications, Inspection, Certification, Export Packing, Documentation and International Shipment Coordination
ApplicationsHigh-Temperature Piping Systems, Heat Treatment Equipment, Furnace Components, Petrochemical, Chemical Processing, Power Generation, Heat Exchangers and Industrial Heating Equipment
1. What are Incoloy 800HT Flanges?

Incoloy 800HT Flanges are nickel-iron-chromium alloy flanges designed for high-temperature piping and equipment connections , particularly where high-temperature strength, creep resistance and oxidation resistance are required.

They are manufactured from Incoloy 800HT / Alloy 800HT , identified by UNS N08811 and W.Nr. 1.4959 .

Common types include Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint and Orifice Flanges . Customized flange configurations can also be supplied according to project requirements.

They can be supplied in Class 150, 300, 600, 900, 1500 and 2500 , subject to the applicable dimensional standard, flange size and customer requirements.

Key advantages include excellent high-temperature strength, good creep and stress-rupture resistance, excellent oxidation resistance, strong carburization resistance and good corrosion resistance in suitable service environments.

They are commonly used in heat treatment equipment, industrial furnaces, petrochemical plants, chemical processing systems, power generation, heat exchangers, industrial heating equipment and high-temperature process piping .

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