Inconel X-750 Forged Ring & Hollow Bar – ASTM B637 / AMS 5667 / AMS 5670 Certified

Product Highlights

• Inconel X‑750 gamma‑prime precipitation‑hardening nickel‑base superalloy ring & hollow bar, UNS N07750 / W.Nr 2.4669, conforms to ASTM B637, AMS 5667 / AMS 5668 aerospace‑industrial specifications
• Ni‑Cr‑Ti‑Al‑Nb alloy system; achieves high strength via multi‑stage precipitation aging, reliable service performance from cryogenic up to 870 °C maximum operating temperature
• Excellent stress‑relaxation resistance, outstanding for high‑temperature spring‑type components, fasteners and pre‑loaded ring‑shaped hardware; good oxidation resistance under hot gaseous atmospheres
• Optional VIM‑VAR double vacuum‑remelted ingot for minimizing non‑metallic inclusions for high‑reliability aerospace critical forgings
• Supplied in solution‑annealed soft condition for full‑range CNC turning, boring, internal‑external groove‑machining prior to multi‑step aging heat‑treatment
• Custom OD, ID, wall‑thickness, height / length; full CNC processing for ring and hollow‑bar components per CAD/PDF drawings
• Premium raw stock for aerospace high‑temp spring retainer rings, gas‑turbine component blanks, high‑strength fastener preforms, heat‑treatment fixture rings and energy‑generation hot‑zone hardware

Product Overview

This series of Inconel X‑750 rings and hollow bars are manufactured by hot forging / hot piercing extrusion. Raw ingot is available in air‑melted or VIM‑VAR vacuum‑remelted variant for high‑purity requirements. Material is solution‑annealed and rapid‑cooled to obtain homogeneous austenitic matrix microstructure. Standard delivery is solution‑annealed soft blank for rough‑and‑finish CNC machining; target mechanical properties are realized by subsequent multi‑stage stabilization plus precipitation aging heat‑treatment.

Inconel X‑750 (UNS N07750 / 2.4669) is gamma‑prime (Ni₃(Al,Ti,Nb)) precipitation‑hardening nickel‑base superalloy. Distinct advantage is excellent anti‑stress‑relaxation performance under sustained high‑temperature pre‑load, widely used for high‑temperature springs, circlips and bolt‑type fasteners. It also possesses good high‑temperature oxidation‑resistance. Widely processed into seamless rolled rings, hollow‑bar sleeves, spring‑retainer ring forgings and hot‑zone fixture preforms for aerospace gas‑turbine, heat‑treatment furnace, power‑generation and high‑performance mechanical‑equipment industries.

Material Grade Characteristics – Inconel X‑750 (UNS N07750 / 2.4669)

• Gamma‑prime precipitation‑hardening nickel‑base superalloy; peak mechanical properties obtained by multi‑step solution‑stabilization‑aging heat‑treatment cycle
• Superior stress‑relaxation resistance at elevated temperatures; ideal for pre‑loaded high‑temperature spring‑retainer ring and fastener‑type components
• Good high‑temperature oxidation‑resistance for oxidizing hot‑gas environments, continuous service capability up to 870 °C
• Optional VIM‑VAR double vacuum‑remelting ingot, reduces non‑metallic inclusions to improve fatigue‑safety margin for aerospace critical‑part applications
• Caution on welding: prone to strain‑age‑cracking under heavy‑restraint welding conditions; post‑weld full solution‑anneal plus multi‑stage aging is strongly recommended to restore complete properties
• Solution‑annealed quenched delivery guarantees low residual stress and good machinability for ring‑hollow‑bar forging blank
• Reminder: Not suitable for long‑term service in heavy sulphur‑containing corrosive flue‑gas environments

Chemical Composition (Weight %)

Mechanical Properties (ASTM B637 / AMS 5667 / AMS 5668 Heat‑Treatment States)

Unified Base Delivery Standard: Hot Forged / Hot Pierced, Solution Annealed, Air/Water Quenched, Stress‑Relieved, Pickled

Related Material Grades

• Inconel Series: 600, 601, 625, 718, X‑750
• Incoloy Series: 800H / 800HT, 825, 925
• Hastelloy Series: C‑4, C22, C276, B3
• Iron‑Nickel Superalloy: A‑286 (Inconel 660), Nimonic 80A
• Heat‑Resistant Stainless: 253MA, 310S, 309S
• Super‑Austenitic: 904L, 254SMO
• Duplex / Super Duplex: 2205, S32750, S32760
• PH Stainless Steel:17‑4PH,15‑5PH
• Alloy Steel:4140, F22, F91, A105

Key Advantages

Typical Applications

• Aerospace & Gas Turbine: High‑temperature spring‑retainer rolled‑ring forgings, circlip‑preform hollow‑bar blanks, gas‑turbine hot‑zone fixture‑ring components
• Industrial Heat‑Treatment Furnace: High‑load hot fixture ring forgings, pre‑loaded hollow‑bar support‑component blanks
• Power‑Generation Industry: Thermal‑cycling high‑stress fastener‑raw‑stock, boiler hot‑zone ring‑shaped hardware
• High‑Performance Mechanical Equipment: High‑temperature circlip, spring‑seat ring‑hollow‑bar pre‑forms, pre‑loaded sealing‑ring forgings
• Special‑Process Equipment: Cryogenic‑to‑elevated‑temperature dual‑service ring‑hollow‑bar structural‑parts

Processing Service

We provide integrated hot‑forging / hot‑pierced hollow‑bar & seamless rolled‑ring production, full custom CNC machining per customer CAD/PDF drawings:

• Cut‑to‑length / ring‑height sizing, facing, centering, OD turning, ID boring, chamfering
• Precision threading, internal‑external groove‑machining, cylindrical grinding & surface polishing for ring‑hollow‑bar parts
• Custom multi‑stage stabilization‑aging heat‑treatment service; VIM‑VAR vacuum‑remelted ingot sourcing for aerospace‑grade requirements
• Pickling, passivation anti‑corrosion surface finishing

We supply Inconel X‑750 ring forgings, hollow‑bar blanks and fully‑machined components for aerospace, furnace‑equipment, power‑generation and global industrial clients.

Quality Assurance

• 100% UT ultrasonic + eddy‑current inspection for forging / piercing internal segregation, inclusion and surface crack defects
• Full‑batch tensile, yield, elongation & hardness mechanical‑property testing for each heat lot & heat‑treatment condition
• Spectrometer full‑spectrum chemical‑composition verification per heat number; trace‑element audit for VIM‑VAR vacuum‑remelted material upon request
• Metallographic inspection: check gamma‑prime precipitate morphology after aging, verify absence of harmful intermetallic‑phases
• High‑precision micrometer & CMM inspection for OD, ID, wall‑thickness, height / length and dimensional‑tolerance control

Mill Test Certificate EN 10204 3.1 / 3.2 can be issued and delivered together with shipment documents before delivery.

Packing & Delivery

Packing ‑ Inner: Independent anti‑rust plastic sleeve + waterproof film full wrap for ring / hollow‑bar surface scratch protection ‑ Outer: Reinforced fumigated wooden pallet / wooden case with separation blocks to avoid collision & deformation ‑ Custom heavy‑duty export packaging for large‑diameter rings & heavy‑wall hollow bars available upon request

Lead Time
Normally 25‑65 working days after receiving advance payment. Exact lead time depends on ring / hollow‑bar dimension, wall‑thickness, melting‑route requirement(VIM‑VAR), order quantity and custom‑heat‑treatment / machining demands.

Request Custom Quotation

Please specify part type (ring / hollow bar), melting‑route (air‑melt / VIM‑VAR vacuum‑remelt), aging‑cycle‑requirement, OD‑ID‑wall‑thickness dimension and engineering drawings. Our superalloy‑forging metallurgy team will send competitive factory price within 24 hours. Free high‑temperature‑relaxation‑application material‑matching technical consultation!