Density: 8.24g/cm³
Equivalent designations:
INCONEL alloy 718,UNS N07718, W.Nr. 2.4668
Available products:
pipe,tube,bar,rod,wire,sheet,strip,bolt and nut,flange,pipe fittings
Inconel 718 alloy is a precipitation hardened Nichrome alloy containing niobium and molybdenum. It has high strength, good toughness and corrosion resistance in high and low temperature environments at temperatures below 700 °C. The state may be a solution treatment or a precipitation hardening state. The age hardening response of Inconel 718 allows for annealing and soldering without spontaneous hardening during heating and cooling.
Melting point of Inconel718 alloy: 1260-1320 °C
| Products | ASTM |
| Bars and forgings | B 637 |
| Plate, sheet and strip | B 670, B 906 |
| Seamless pipes and fittings | B 983 |
Chemical composition:
|
Grade
|
Chemical Component % | ||||||||||||||
| C | Cr | Ni | Si | Mn | P | S | Cu | Al | Mo | Ti | Nb+Ta | Fe | Co | B | |
| Inconel 718 | Max 0.08 | 17.0-21.0 | 50.0-55.0 | Max 0.35 | Max 0.35 | Max 0.015 | Max 0.015 | Max 0.3 | 0.2-0.8 | 2.8-3.3 | 0.65-1.15 | 4.75-5.5 | Balance | Max 1.0 | Max 0.006 |
| State | Tensile strength Rm N/mm² | Yield strength Rp0.2 N/mm² | Elongation A5 % | Brinell hardness HB |
| Solution treatment | 965 | 550 | 30 | ≥363 |
1. Easy processing
2. High tensile strength, fatigue strength, creep strength and breaking strength at 700 °C
3. High oxidation resistance at 1000 ° C
4. Stable chemical properties at low temperatures
5. Good welding performance
Metallographic structure of Inconel 718 alloy:
GH4169 alloy has an austenitic structure, and the γ" phase formed by precipitation hardening has excellent mechanical properties. The δ phase formed at the grain boundary during heat treatment makes it have the best plasticity.
Application:
1. Steam turbine
2. aerospace
3. Cryogenic engineering
4. acidic environment
5. Nuclear engineering
Available products for Inconel 718:
Welded pipe/tube
Seamless pipe/tube
Pipe fittings
Flanges
Bar/Profiles
Sheet/ Plate/Coil/Strip
Wire/Wire rope
Forgings
Welding Rod
Fastener
Cargo packaging:
