Inconel 718 UNS N07718 2.4668 Heat-Resisting Superalloy Bars and plates
It exhibits excellent comprehensive properties in the temperature range of -253°C to 700°C, with its yield strength below 650°C ranking first among wrought superalloys. It also features good fatigue resistance, radiation resistance, oxidation resistance and corrosion resistance, as well as favorable formability and weldability, yet the cost of its machining is relatively high.
Applications of Inconel 718
It can be fabricated into various components with complex geometries and is widely used in aerospace, nuclear energy, petroleum industries and extrusion dies. It is applicable for manufacturing various stationary and rotating parts in aerospace engines, such as disks, ring forging parts, blades, shafts, fasteners, sealing elements and welded structures. Additionally, it can be used to produce various elastic components for nuclear industry applications.
Equivalent Grades and Commonly Used Specifications of Inconel 718
| Steel Grade | Specification | Specification Name |
| GH4169 /
GH169 / H41690 |
GB/T 14992 | Superalloys and intermetallic compounds-Designation and chemical composition |
| GB/T 14994 | Superalloy Cold Drawn Bars | |
| GJB 713A | Specification for superalloy bars for aerospace | |
| GB/T 30566 | Cold-rolled heat-resisting superalloy sheets | |
| UNS N07718 /
Inconel 718 |
ASTM B637 | Standard Specification for Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service |
| ASTM B670 | Precipitation-Hardening Nickel Alloy Plate, Sheet, and Strip for High-Temperature Service | |
| ASTM B983 | tandard Specification for Precipitation Hardened or Cold Worked, Seamless Nickel Alloy Pipe and Tube | |
| AMS 5662 | Nickel Alloy, Bars, Forgings, and Rings, Solution Treated (Inconel 718) | |
| AMS 5663 | Nickel Alloy, Bars, Forgings, and Rings, Solution Treated and Precipitation Hardened (Inconel 718) | |
| AMS 5596 | Nickel Alloy, Plate, Sheet, and Strip, Solution Treated (Inconel 718) | |
| AMS 5597 | Nickel Alloy, Plate, Sheet, and Strip, Solution Treated and Precipitation Hardened (Inconel 718) | |
| Products produced as per other specifications or technical agreements (if need) are available. | ||
Typical Chemical Composition of Inconel 718
| Elements | C | Si | Mn | P | S | Ni | Cr | Co | Mo | Ti | Al | B | Cu | Nb+Ta |
| Contents% | ≤0.08 | ≤0.35 | ≤0.35 | ≤0.015 | ≤0.015 | 50.00~55.00 | 17.00~21.00 | ≤1.00 | 2.80~3.30 | 0.65~1.15 | 0.20~0.80 | ≤0.006 | ≤0.30 | 4.75~5.50 |
| Products produced as per other specifications or technical agreements (if need) are available. | ||||||||||||||
Typical Chemical Composition of Inconel 718
|
Delivery Condition |
Mechanical Properties and Hardness of Heat-Treated Specimens | ||||||
| Rp0.2/(N/mm2) | Rm/(N/mm2) | A/% | Zb/% | Aku2d/J | HBW |
HRC |
|
|
Solution Treated（924℃-1010℃, hold 1/2h at least, air） |
≥1034 | ≥1275 | ≥6 | ≥8 | / | ≥331 |
≥36 |
|
Precipitation Hardening（718℃±14℃, 8h, furnace cool to 621℃, ±14℃, hold until total time has reached 18h, air） |
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| Products produced as per other specifications or technical agreements (if need) are available. | |||||||
Product Forms and Size Range of Inconel 718
|
Product forms |
Size range |
|
Bars |
Diameter or side length: 5.0mm~1000mm |
| Flats |
thickness: 4.0mm~1000mm width: 300mm~2200mm |
| Produce as other form and size according to technical requirements are available. | |
