High-performance alloy material for industrial engineering and critical application conditions.
Scope of supply for Aviation Group
Forgings, round rods, steel plates, rings, seamless pipes, steel plates/steel belts, wire welding materials, welcome to inquire!
1. Introduction to GH825 materials
GH825 is a fully austenitic titanium-stabilized nickel-iron-chromium alloy with added copper and molybdenum elements. As a universal engineering alloy, it resists corrosion by acids and alkalis under both oxidizing and reducing environments.
High nickel content delivers excellent resistance to stress corrosion cracking. It performs well in multiple corrosive media including sulfuric acid, phosphoric acid, nitric acid, organic acids, sodium hydroxide, potassium hydroxide and hydrochloric acid solutions. Its outstanding comprehensive performance enables unified processing of mixed corrosive media such as sulfuric acid, nitric acid and sodium hydroxide inside nuclear dissolver equipment.
Rich chromium, molybdenum and copper endow GH825 with strong general corrosion resistance against oxidizing and non-oxidizing acids, especially superior tolerance to sulfuric acid. High chromium, molybdenum and nickel content provides excellent resistance to pitting, crevice corrosion and chloride-induced stress corrosion cracking. Ultra-low carbon content minimizes intergranular corrosion sensitization during welding.
2. Chemical composition of GH825
| Alloy | Limit | Ni | Cr | Fe | C | Mn | Si | Cu | Mo | Al | Ti | P | S |
| GH825 | Minimum | 38 | 19.5 | Bal | – | – | – | 1.5 | 2.5 | – | 0.6 | – | – |
| Maximum | 46 | 23.5 | 0.025 | 1.0 | 0.5 | 3.0 | 3.5 | 0.2 | 1.2 | 0.02 | 0.01 |
3. GH825 physical properties
| Density | 8.14g/cm³ |
| Melting point | 1370-1400℃ |
Minimum room temperature mechanical properties of GH825 alloy:
| Alloy state | Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation A5 % | Brinell hardness HB |
| Solid solution state | 550 | 220 | 30 | ≤200 |
4. GH825 alloy characteristics
5. Corrosion resistance of GH825 alloy
GH825 is a universal engineering alloy resistant to acid and alkali corrosion under oxidizing and reducing conditions. High nickel content effectively prevents stress corrosion cracking, with stable corrosion resistance in sulfuric acid, phosphoric acid, nitric acid, organic acids, sodium hydroxide, potassium hydroxide and hydrochloric acid. Its all-round performance allows simultaneous treatment of sulfuric acid, nitric acid, sodium hydroxide and other mixed corrosive media inside nuclear dissolver equipment.
6. GH825 application fields
GH825 is widely applied in industrial environments with service temperature ≤550℃.
