Inconel 600、Inconel 601、Inconel 625(N06625)Inconel alloy

Inconel 600、Inconel 601、Inconel 625(N06625)Inconel alloy

Inconel alloys are a class of nickel-chromium-based superalloys. Inconel 625 exhibits excellent resistance to seawater pitting and crevice corrosion, making it suitable for harsh marine and chemical environments. Inconel 718, through age hardening, possesses extremely high strength at room temperature and below 650°C, making it the preferred material for aero-engines and oil and gas fields. Inconel 600/601 is specifically designed to provide long service life for high-temperature furnaces and heat treatment equipment. Our company supplies the full range of Inconel grades and forms (plates, bars, tubes, forgings, welding materials), supports small-batch trial orders and customized processing, and leverages efficient delivery through major domestic ports to provide reliable material solutions for high-temperature and corrosive environments.
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Product Description

ItemDescription
Product NameInconel Alloy (Nickel-Chromium Base Superalloy, Inconel 600/601/625/718/690/725)
Common GradesInconel 600 (UNS N06600):Classic Ni-Cr alloy with good oxidation and corrosion resistance for heat treatment and chemical applications.Inconel 601 (UNS N06601):Al addition provides outstanding oxidation resistance for industrial furnaces and heat exchangers.Inconel 625 (UNS N06625):Mo and Nb additions offer high strength, excellent pitting and crevice corrosion resistance; widely used in marine and chemical sectors.Inconel 718 (UNS N07718):Precipitation-hardened alloy with exceptional high-temperature strength; key material for aero-engines and gas turbines.Inconel 690 (UNS N06690):High Cr content provides excellent SCC resistance and nitric acid service; mainly used in nuclear industry.Inconel 725 (UNS N07725):Similar to 718, designed for sour oil/gas environments (NACE MR0175).
UNS No.N06600, N06601, N06625, N07718, N06690, N07725, etc.
Material TypeNickel-Chromium based austenitic superalloy; solid-solution strengthened (600/601/625/690) or precipitation hardened (718/725)
Product FormsPlate, Sheet, Bar (Round/Square), Pipe/Tube (Seamless/Welded), Strip, Wire, Forgings, Welding Consumables, Precision Castings, Custom Shapes
SpecificationsASTM:B168, B166, B167, B163, B564, B443, B637; ASME SB counterpartsChinese GB:GB/T 15007, GB/T 15008, GB/T 30059, NB/T 47019Others:AMS 5540, 5599, 5662, 5663; ISO 15156-3 (NACE MR0175 for 718/725)
Typical Chemical Composition (wt%)Inconel 600:Ni≥72.0, Cr 14.0-17.0, Fe 6.0-10.0, Mn≤1.0, C≤0.15Inconel 601:Ni 58.0-63.0, Cr 21.0-25.0, Al 1.0-1.7, Fe balanceInconel 625:Ni≥58.0, Cr 20.0-23.0, Mo 8.0-10.0, Nb+Ta 3.15-4.15, Fe≤5.0Inconel 718:Ni 50.0-55.0, Cr 17.0-21.0, Fe balance, Nb+Ta 4.75-5.50, Mo 2.80-3.30, Ti 0.65-1.15, Al 0.20-0.80
Physical Properties (Typical)Density:8.42 (600) ~ 8.44 (625/718) g/cm³Melting Range:1350-1413℃ (grade dependent)Thermal Conductivity (20℃) :~14.8 (600) to 9.8 (718) W/(m·K)Coefficient of Thermal Expansion (20-200℃) :~13.3×10⁻⁶ /K (600), 12.8×10⁻⁶ /K (718)Electrical Resistivity:~1.03-1.30 μΩ·mElastic Modulus:~200-214 GPa
Mechanical Properties (Typical, Room Temperature)Inconel 600 (Annealed):UTS≥550 MPa, YS≥240 MPa, Elong.≥30%Inconel 601 (Annealed):UTS≥550 MPa, YS≥205 MPa, Elong.≥30%Inconel 625 (Solution Annealed):UTS≥760 MPa, YS≥345 MPa, Elong.≥30%Inconel 718 (Solution + Aged):UTS≥1275 MPa, YS≥1035 MPa, Elong.≥12%High-Temperature:718 retains >1000 MPa at 650℃; 625 ~550 MPa at 650℃
Corrosion ResistanceExcellent resistance to high-temperature oxidation, carburization, nitriding, and chloride attack. Inconel 625 has exceptional pitting/crevice and seawater corrosion resistance (PRE≥45). Inconel 690 offers superior SCC resistance in high-concentration nitric acid and high-purity water. Inconel 718/725 resist sour H₂S/CO₂ environments. Oxidation limits: 600 to 1100℃, 601 to 1200℃, 625 to 980℃.
Key FeaturesOutstanding high-temperature strength, oxidation and corrosion resistance; good workability and weldability; stable austenitic structure from cryogenic to elevated temperatures (up to ~1100℃); excellent thermal fatigue and creep resistance; age-hardenable grades (718) provide ultra-high strength.
Main ApplicationsAerospace:Turbine blades, discs, combustion chambers, casings, afterburners (718, 625).Chemical/Petrochemical:Reactors, heat exchangers, piping, valves (600, 625).Nuclear:Steam generator tubes for PWR (690), fuel element grids.Marine:Seawater cooling systems, pumps, valves, fasteners (625).Heat Treatment:Furnace rollers, retorts, radiant tubes (600, 601).Oil & Gas:Downhole tools, completion equipment, sour service seals (718, 725).
Fabrication & WeldingHot Forming:Start at 1150-1200℃, finish ≥950℃, air cool. Avoid sulfur/lead contaminated atmospheres.Cold Forming:Good ductility but significant work hardening; intermediate solution annealing may be required.Welding:TIG, MIG, plasma arc, electron beam, resistance welding. Use matching filler (e.g., ERNiCrMo-3 for 625, ERNiFeCr-2 for 718). Preheat not required; interpass ≤150℃. Post-weld heat treatment generally not required for solid-solution alloys; age-hardening alloys require specific aging cycles.
Heat TreatmentSolution Annealing (600/625, etc.):980-1065℃, then water quench or rapid air cool.Solution + Aging (718):980℃±15℃ hold 1h, air cool; then age at 720℃ for 8h, furnace cool to 620℃ hold 8h, air cool. Produces maximum strength.
PackagingPlate/Sheet:Protective film/oil, stacked on wooden/steel pallets, steel strapped, wrapped with waterproof paper.Bar/Tube:Bundled with plastic/canvas sleeve, in wooden crates or steel racks.All packaging meets sea-freight and export standards, moisture/rust/impact protected. Fumigation-free wooden cases available.
Storage ConditionsStore indoors in dry, ventilated area free from corrosive gases. Avoid direct contact with carbon steel to prevent surface contamination.
Shipping RequirementsNon-hazardous cargo. Protect from rain and heavy impact. Load/unload carefully.
Minimum Order Quantity (MOQ)Standard plates/bars: 500kg ~ 2 tons (mixed grades allowed)Trial order: 100-500kg (size limitations)Tubes/Forgings/Welding consumables: negotiable
Delivery TimeStock:1-3 working daysFutures (Domestic) :15-30 working daysFutures (Imported) :8-12 weeks
Payment TermsT/T (30% deposit, 70% before shipment or against B/L copy); L/C at sight, D/P accepted; monthly payment for long-term partners negotiable


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