GH625
GH625 alloy is a solid solution strengthened nickel-based deformation high temperature alloy with molybdenum and niobium as the main strengthening elements. It has excellent corrosion resistance and oxidation resistance, good tensile and fatigue properties from low temperature to 980 degrees Celsius, and is resistant to stress corrosion in salt spray atmosphere.
Content
Chemical composition of GH625(%)
| Element | Minimum(%) | Maximum(%) |
|---|---|---|
| C | - | 0.1 |
| Cr | 20 | 23 |
| Co | - | 1 |
| Ni | remiander | remiander |
| Mo | 8 | 10 |
| Nb | 3.15 | 4.15 |
| Fe | - | 5 |
| Al | - | 0.4 |
| Ti | - | 0.4 |
| Si | - | 0.5 |
| Mn | - | 0.5 |
| S | - | 0.015 |
| P | - | 0.015 |
| Cu | - | 0.07 |
Physical properties of GH625
| Property | Value |
|---|---|
| Density | 8.44 g/cm³ |
| Melting range | 1290-1350°C |
| Thermal conductivity | 12.1 W/m•K（at 100℃) |
| Specific heat capacity | 430 J/kg·K (at 20℃) |
| Electrical Resistivity | 1.28μΩ•m |
| Poisson’s Ratio | 0.308 |
| Coefficient of Linear Thermal Expansion | 12.3 x 10⁻⁶ ℃/K(at 20~100℃) |
| Modulus of Elasticity | 205 Gpa |
Mechanical properties of GH625 alloy
| Property | Value |
|---|---|
| Tensile Strength | 830 MPa |
| Yield Strength | 410 MPa |
| Hardness (HBS) | ≤290 |
| Elongation | 30% |
Applications of GH625
Components of organic chemical processes containing chlorides, especially when using acidic chloride catalysts
For the manufacture of digesters and bleaching tanks in the pulp and paper industry
Absorbers, reheaters, flue gas inlet baffles, fans (humid), agitators, guide plates and flues in flue gas desulfurization systems
For the manufacture of equipment and components for use in acidic gas environments
Acetic acid and acetic anhydride reaction
