Alloy families
Nickel-chromium, nickel-iron-chromium, nickel-chromium-molybdenum, nickel-copper, and related corrosion-resistant alloys
Material grades
Nickel Alloy Grades for Flanges & Pipe Fittings
The RTI Nickel Alloys material hub connects a buyer's corrosion, temperature, fabrication, and project-specification questions to a controlled grade and product route. Review Inconel 625, Incoloy 825, Hastelloy C276, Monel 400, Alloy 20, and related approved grades before selecting forged flanges, wrought pipe fittings, forged fittings, inspection requirements, or documentation. Final material suitability remains an engineering and project-specification decision.
Technical snapshot
Key details for your specification.
Engineering discussion
Context before component selection.
Choose by corrosion mechanism, not alloy prestige
Different nickel alloys address different combinations of reducing or oxidizing acids, chlorides, seawater, sour constituents, temperature, fabrication, and mechanical requirements. Begin with the actual environment and approved project material list.
The UNS designation anchors material identity
Trade names support recognition, but the RFQ should include the exact UNS designation, product specification, product form, condition, and any project grade or class requirement. This reduces ambiguity and substitution risk.
Product form changes the applicable standard
Forged flanges and forged fittings do not automatically share the same product specification as wrought butt-weld fittings. Confirm the material standard for the exact grade and construction route before commercial comparison.
Inspection should resolve identified risks
PMI supports grade identity; MTC review supports lot-specific chemistry and mechanical evidence; dimensions, NDE, corrosion tests, hardness, TPI, and marking should be specified only where the project requires them.
Material selection and supply acceptance are separate
Engineering selects and approves the material for service. Procurement then defines the product form, dimensions, tests, documentation, packing, and release criteria needed to accept the supplied component.
Standards and release
Define the basis, then document it.
Forged products
Confirm the grade-appropriate ASTM B564, ASTM B462, ASME equivalent, or other approved forging specification for the ordered flange or forged component.
Wrought fittings
Confirm ASTM B366 / ASME SB366 or the applicable grade- and construction-specific product route for elbows, tees, reducers, caps, and stub ends.
Dimensional standards
Pair the material route with ASME B16.5, B16.47, B16.9, B16.11, B16.36, MSS, or an approved drawing as applicable.
Project requirements
NACE, corrosion testing, hardness, heat treatment, NDE, PMI, cleaning, inspection, and certificate acceptance remain project-specific controls.
Applications and next steps
Connect the requirement to the right workflow.
Chemical and petrochemical processing
Offshore and marine systems
Oil, gas, and sour-service projects requiring review
LNG and gas processing
Acid and alkali handling
Seawater equipment
High-temperature process components
Heat exchanger and vessel connections
Inconel 625 MaterialReview controlled UNS N06625 data and procurement guidance.Incoloy 825 MaterialReview the N08825 material route.Hastelloy C276 MaterialReview N10276 corrosion and procurement context.Monel 400 MaterialReview the N04400 nickel-copper route.Alloy 20 MaterialReview the N08020 material route.Nickel Alloy FlangesMove from material family to flange configuration.Nickel Alloy Pipe FittingsMove from material family to fitting geometry.Alloy Comparison ToolCompare controlled procurement signals across alloy families.Request Technical QuotationSend the defined grade and component requirement.
Buyer questions
Frequently asked questions.
Technical quotation
Turn this guidance into a controlled request.
Capture the material, product form, dimensions, standard, inspection, documentation, packing, and destination requirements for review.
