GB/T | UNS | Trademark | W.Nr |
GH4169 | N07718 | Inconel718 | 2.4668 |
chemical composition:
alloy | % | Ni | Cr | Fe | Mo | Nb | C | Mn | Si | S | Cu | Al | Ti | N |
GH4169 | min | 50 | 17 | margin | 2.8 | 4.75 | 0.20 | 0.65 | ||||||
max | 55 | 21 | 3.3 | 5.50 | 0.08 | 0.35 | 0.35 | 0.015 | 0.30 | 0.80 | 1.15 | 0.006 |
Physical properties
density | 8.24 g/cm3 |
Melting point | 1260-1320 ℃ |
The minimum mechanical properties of the alloy at room temperature:
alloy | Tensile Strength Rm N/mm² | Yield Strength Rp0.2 N/mm² | ElongatSion A5 % | Brinell hardness HB |
Solution treatment | 965 | 550 | 30 | ≤363 |
GH4169 alloy has the following characteristics:
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 GH4169:
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.
Corrosion resistance of GH4169:
GH4169 alloy has excellent resistance to stress corrosion cracking and pitting, whether in high temperature or low temperature environments. GH4169 alloy is particularly excellent in oxidation resistance at high temperatures.
The application areas of the GH4169 application range are:
Due to its high temperature strength at 700 ° C, excellent corrosion resistance and ease of processing, the GH4169 can be used in a wide range of demanding applications.
Turbine
2. Liquid fuel rocket
3. Cryogenic engineering
4. Acidic environment
5. Nuclear engineering