Inconel Alloy 718 N07718 2.4668 Nickel Superalloy Wire
Inconel Alloy 718 N07718 2.4668 Nickel Superalloy Wire
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Contact us for more information regarding our nickel alloy manufacturing and distribution options. Fushun is your trusted nickel alloy supplier for all types of Nickel alloy material.
Introduce
Inconel 718 is an age-hardenable Alloy-chromium alloy that combines corrosion resistance with high strength and good fabricability. It has high creep-rupture strength at temperatures up to 700 ℃. Its excellent relaxation resistance contributes to its application in springs.
Application
The alloy is used in jet engine and high-speed airframe parts such as wheels, buckets and spacers, and high-temperature bolts and fasteners. Inconel 718 is also used in the oil and gas drilling and production industries due to its high strength and resistance to chlorides, stress corrosion and sulfide stress cracking. Within these industries the alloy has been used for valves, pump shafts and wellhead components.
Heat-Treat Process
Inconel® 718 is typically purchased in the mill- or solution-annealed condition. In some instances, it has a stress-relief operation performed on it prior to fabrication and heat treatment. The solution anneal is followed by a precipitation (age) hardening step. Precipitation of secondary phases (e.g., gamma prime and gamma double-prime) into the metal matrix hardens the material. The precipitation of nickel-aluminum, nickel-titanium and nickel-niobium phases is triggered by aging in the temperature range of 600-815˚C (1100-1500˚F). The key to the heat-treatment process is to be sure these age-hardening constituents are fully in solution at high temperature (i.e., fully dissolved in the matrix), otherwise precipitation will not result in full strength.Two heat treatments are common (although slight temperature variations of these recipes are often employed).Solution anneal at 925-1010˚C (1700-1850˚F) followed by rapid cooling (usually in water). This is followed by precipitation hardening at 720˚C (1325˚F) for 8 hours, furnace cooling to 620˚C (1150˚F) and holding for 10 hours followed by air cooling.
Solution anneal at 1040-1065˚C (1900-1950˚F) followed by rapid cooling (usually in water). This is followed by precipitation hardening at 760˚C (1400˚F) for 10 hours, furnace cool to 650˚C (1200˚F) and holding for 10 hours followed by air cooling.Solution heat treatments are typically done in low-dew-point argon or vacuum furnaces, often with all-metal hot zones to avoid discoloration. The effect of annealing for 30 minutes on the grain size (Fig. 2) of sheet varies with temperature. Also, aging response of Inconel® 718 is rather slow in comparison with that of aluminum-titanium-hardened alloys. Thus, in most sizes, the alloy can be heated and cooled through the aging temperature range at normal speeds yet retain softness and ductility. The effect of aging time and temperature on the hardness of annealed sheet (Fig. 3) reflects this.
Standards
718 Sheet, Coil and Plate: UNS N07718, AMS 5596, ASTM B 670, ASME SB 670, B50TF14,
718 Round Bar: UNS N07718, AMS 5662, ASTM B 637, B50TF15, B50809D (Power Generation)
other:AMS 5662, AMS 5663, AMS 5832, AMS 5962, ASTM B637, GE B14H89, ISO 15156-3, (NACE MR 0175)
| Density | 8.19g/cm³ | 0.296 lb/in³ |
| Melting Point | 1336°C | 2437°F |
| Coefficient of Expansion | 13.0 μm/m °C (20 – 100°C) | 7.2 x 10-6 in/in °F (70 – 212°F) |
| Modulus of Rigidity | 77.2 kN/mm² | 11197 ksi |
| Modulus of Elasticity | 204.9 kN/mm² | 29719 ksi |
| Properties | ||||
|---|---|---|---|---|
| Condition | Approx. tensile strength | Approx. operating temperature depending on load^^ and environment | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 800 – 1000 | 116 – 145 | – | – |
| No 1 Temper | 1000 – 1200 | 145 – 175 | – | – |
| Spring Temper | 1250 – 1550 | 180 – 225 | – | – |
| No 1 Temper + Annealed + Aged | 1250 – 1450 | 181 – 210 | -200 to +550 | -330 to +1020 |
| No 1 Temper + Aged | 1520 – 1720 | 220 – 250 | Contact Alloy Wire Technical Dept | |
| Spring Temper + Annealed + Aged | 1250 – 1450 | 181 – 210 | -200 to +550 | -330 to +1020 |
| Spring Temper + Aged | 1700 – 1950 | 247 – 283 | Contact Alloy Wire Technical Dept | |
Key Features
Good creep rupture strength at high temperatures
Higher strength than Inconel X-750
Better mechanical properties at lower temperatures than Nimonic 90 & Inconel X-750
Age hardenable
High temperature dynamic applications
Chemical Composition
| Ni | Fe | Cr | Cu | Mo | Nb | C | Mn | P | S | Si | Ti | Al | Co | B |
| 50.00-55.00 | Remainder | 17.00-21.00 | .30 max | 2.80-3.30 | 4.75-5.50 | .08 max | .35 max | .015 max | .015 max | .35 max | .65-1.15 | .20-.80 | 1.00 max | .006 max |
Mechanical Properties
| Condition | Approx. tensile strength | Approx. operating temperature depending on load^^ and environment | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 800 – 1000 | 116 – 145 | – | – |
| No 1 Temper | 1000 – 1200 | 145 – 175 | – | – |
| Spring Temper | 1250 – 1500 | 180 – 225 | – | – |
| No 1 Temper + Annealed + Aged | 1250 – 1450 | 181 – 210 | -200 to +550 | -330 to +1020 |
| No 1 Temper + Aged | 1520 – 1720 | 220 – 250 | Contact Alloy Wire Technical Dept | |
| Spring Temper + Annealed + Aged | 1250 – 1450 | 181 – 210 | -200 to +550 | -330 to +1020 |
| Spring Temper + Aged | 1700 – 1950 | 247 – 283 | Contact Alloy Wire Technical Dept | |
| Heat Treatment of Finished Parts | |||||
|---|---|---|---|---|---|
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| No. 1 or Spring Temper | Anneal Age Harden Total Age |
980 720 620 |
1800 1330 1150 |
1 8 18 |
Air Furnace Air |
| No. 1 or Spring Temper (for ISO 15156-3 / NACE MR 0175) |
Anneal Age Harden |
1010 790 |
1850 1455 |
2 6 |
Air Air |
| No. 1 Temper or Spring Temper | Age Harden Total Age |
720 620 |
1330 1150 |
8 18 |
Furnace Air |
Quality & Testing
Fushun supply 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 us for 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.
