ASTM B637 UNS N07718 W.Nr.2.4668 API 6A 718 Inconel 718 Heat Resistant Alloys
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Contact usfor more information regarding our nickel alloy manufacturing and distribution options. Fushun is your trusted nickel alloy supplier for all types of Nickel alloy material.
1.Introduction:
Inconel 718 is one kinds of heat resistant alloys which is a high strength, corrosion resistant nickel chromium alloy used at -423°F to 1300°F, initially developed for the aerospace industry and still considered the material of choice for the majority of aircraft engine components. Its excellent strength and corrosion resistance have been recognised by the oil industry and it is now widely used in this field.
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2.Applications:
Gas turbine engine parts
Liquid fuel rocket motor components
Springs, fasteners
Cryogenic tanks
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3.Size Range:
Plate and Sheet: Thickness: 0.016″-3.00″, Width: 20″-48″
Round Bar: 1/4″ Diameter to 12″ Diameter
Tube (welded & seamless): Outer Diameter: 1/16″-3″, Wall Thickness: 0.010″-0.250″,
Length: 17’/24′ FT R/L
Pipe: 1/4″ sch 10 to 16″ sch 80
Wire: 0.1mm-20mm
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4.Quality Standard:
AMS 5589E Nickel Alloy, Corrosion and Heat-Resistant, Seamless Tubing
AMS 5590 Nickel Alloy, Corrosion and Heat-Resistant, Seamless Tubing, 52.5Ni – 19Cr – 3.0Mo – 5.1Cb (Nb) – 0.90Ti – 0.50Al – 18Fe, Consumable Electrode or Vacuum Induction Melted 1950 °F (1066 °C) Solution Heat Treated
AMS 5596
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4.All Grades Comparison
| DIN | ASTM B637 | API 6A |
|---|---|---|
| W.Nr.2.4668 | UNS N07718 | 718 |
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5.Chemical Composition(%)
| C | Si | Mn | P | S | Cr | Ni | Nb+Ta | Co | Mo | Fe | Al | Ti | Cu | B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.08 max | 0.35 max | 0.35 max | 0.015 max | 0.015 max | 17.0-21.0 | 50.0-55.0 | 4.75-5.50 | 1.0 max | 2.8-3.3 | balance | 0.2-0.8 | 0.65-1.15 | 0.3 max | 0.006 max |
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6.Mechanical Properties (solution + precipitation harden)
| Tensile Strength Rm (Mpa) | Yield Strength Rp0.2 (Mpa) | Elongation % in 2″ (50.8 mm) | Reduction Of Area (%) | Hardness (HBW) |
|---|---|---|---|---|
| 1275 min | 1034 min | 6 min | 8 min | 331 min |
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7.Heating and Pickling:
When Inconel 718 Heat Resistant Alloys is heated care must be taken to maintain both the furnace and the material being heated at correct temperatures.
Fuels used for heating must be extremely low in sulfur. The alloy must be absolutely clean and free from all oil, paint, grease, and shop soil when charged into the furnace.
The furnace atmosphere for forging or open annealing should be slightly reducing, containing at least 2% carbon monoxide. A slight positive pressure should be maintained in the furnace to prevent air infiltration.
When Inconel 718 Heat Resistant Alloys is heated in a reducing atmosphere, a thin, adherent green-black film of oxide will be left on the surface of the material. In oxidizing atmospheres, a heavy black scale is produced that is very difficult to remove.
Every precaution should be taken in heating so that only the green-black film is formed.
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8.Heat Treatment:
For most applications, Inconel 718 Heat Resistant Alloys is specified as: solution annealed and precipitation hardened (precipitation hardening, age hardening, and precipitation heat treatment are synonymous terms).
Inconel 718 Heat Resistant Alloys is hardened by the precipitation of secondary phases (e.g. gamma prime and gamma double-prime) into the metal matrix.
The precipitation of these nickel-(aluminum, titanium, niobium) phases is induced by heat treating in the temperature range of 1100 to 1500°F. For this metallurgical reaction to properly take place, the aging constituents (aluminum, titanium, niobium) must be in solution (dissolved in the matrix); if they are precipitated as some other phase or are combined in some other form, they will not precipitate correctly and the full strength of the alloy with not be realized.
CORROSION RESISTANCE:
Inconel 718 Heat Resistant Alloys has excellent corrosion resistance to many media. This resistance, which is similar to that of other nickel-chromium alloys, is a function of its composition. Nickel contributes to corrosion resistance in many inorganic and organic, other than strongly oxidizing, compounds throughout wide ranges of acidity and alkalinity.
It also is useful in combating chloride-ion stress-corrosion cracking. Chromium imparts an ability to withstand attack by oxidizing media and sulfur compounds. Molybdenum is known to contribute to resistance to pitting in many media.
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Quality & Testing
Fushunsupply Certification with all shipments, containing full chemical analysis and also mechanical test results if requested.
All incoming material is visually inspected and PMI (Positive Material Identification) tested before processing begins and all our production material is checked during each stage of processing.
All incoming orders are produced to the individual customer specification, some of which may involve processing sample batches for testing prior to full production.
Final Inspection carried out on all finished material to include:
Visual inspection
Dimensional checks
PMI (Positive Material Identification)
Mechanical tests
Nickel Alloy Material Available Formats
Fushun offers pure Nickel alloy materials in a variety of forms, including:
Seamless & welded pipe
Seamless & welded tube
Bar
Wire
Sheet
Plate
Forgings
Pipe fittings
Flanges
Weld Rod
Nickel Alloy Supply Quantities for Single Items or Full Bills
At Fushun, we can supply single items or full bills of nickel alloy materials for most any project. No inquiry is too small. We offer quick responses to customer inquiries and specialize in the rapid delivery of both large and small quantities of nickel alloy products.
Contact Fushun for Nickel Alloy Materials Today
Contact usfor more information regarding our nickel alloy material options, or request a quote for further pricing details today. Fushun is your trusted nickel alloy supplier and manufacturer of premium nickel alloy materials.
