GH625/GH3625
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Description
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 GH625/GH3625 materials
GH3625 (GH625) alloy is a solid solution-strengthening nickel-based deformation high-temperature alloy with molybdenum niobium as the main reinforcement element. It has excellent corrosion resistance and oxidation resistance. It has good tensile and fatigue properties from low temperature to 980 degrees Celsius, and is resistant to stress corrosion under salt spray atmosphere.
Implementation standards
GJB 1953-1994 “Specifications on Hot Rolled Rods for High Temperature Alloys for Rotating Parts of Aero Engines”
GJB 2611-1996 “Specifications for Cold Pulling Rods for High Temperature Alloys for Aviation”
GJB 2612-1996 “Specifications for Cold Drawing of High Temperature Alloys for Welding”
GJB 3020-1997 “Specifications for High Temperature Alloy Ring Bills for Aviation”
GJB 3165-1998 “Specifications on Hot Rolling and Forged Rods for Aviation Loading Parts”
GJB 3782-1999 “Specifications for High Temperature Alloy Rods for Aviation”
HB 5198-1982 “Deformed high-temperature alloy rods for aviation blades”
2. Chemical components
| Alloy Medal | % | C | Cr | Co | In | Mo | Nb | Fe | Al | Of | And | Mn | S | P | Cu |
| Gh625/
Gh3625 |
Minimum value | – | 20.0 | – | Remain
quantity |
8.0 | 3.15 | – | – | – | – | – | – | – | – |
| Maximum value | 0.10 | 23.0 | 1.0 | 10.0 | 4.15 | 5.0 | 0.4 | 0.4 | 0.5 | 0.5 | 0.015 | 0.015 | 0.07 |
3. Physical properties
| density
g / cm3 |
Melting point
℃ |
Thermal conductivity
λ/(W/m·℃) |
Specific heat capacity
J/kg·℃ |
Elastic modulus
GPa |
Shear modulus
GPa |
Resistivity
μΩ·m |
Poisson’s | Coefficient of linear expansion
a/10-6℃-1 |
| 8.44 | 1290
1350 |
12.1(100℃) | 430 | 205 | 79 | 1.28 | 0.308 | 12.3(20~100℃) |
4. Mechanical properties
(Minimum value of mechanical properties detected at 20°C [1] )
| Heat treatment method | tensile strength
σb/MPa |
Yield of yield
σp0.2/MPa |
Elongation
S5 /% |
Brinell hardness
HBS |
| Solid solution treatment | 830 | 410 | 30 | ≤290 |
V. Alloy characteristics :
It has excellent corrosion resistance to various corrosive media in the oxidation and reduction environments
Excellent resistance to pit and crevice corrosion and does not cause stress corrosion cracking due to chloride
Excellent resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid, and mixed acid of sulfuric acid and hydrochloric acid, etc.
Excellent resistance to corrosion of various inorganic acid mixed solutions
When the temperature reaches 40℃, it can show good corrosion resistance in hydrochloric acid solutions of various concentrations.
Good processability and welding properties, no cracking sensitivity after welding
Manufacturing certification for pressure vessels with wall temperatures between -196 and 450°C
6. Application areas
Components of organic chemical process processes containing chlorides, especially in the use of acid chloride catalysts
Cookers and bleaching tanks for the pulp and paper industry
Absorption towers, reheaters, flue gas inlet baffles, fans (wet), stirrers, deflectors and flue ducts in flue gas desulfurization system
Equipment and components for the manufacture of acid gas environments
Reaction of acetic acid and acetic anhydride
