Inconel 625 Features:
Chemical composition: Mainly composed of nickel, chromium, molybdenum and niobium, providing high tensile strength and corrosion resistance.
Mechanical properties: Excellent tensile strength, yield strength and elongation.
Corrosion resistance: Excellent corrosion resistance in oxidizing, reducing acid, chloride, fluoride environment and high temperature oxidation and carbonization environment.
Application: Widely used in aerospace, chemical processing, marine engineering and nuclear industry.
Inconel 718 Features:
Chemical composition: Precipitation hardening nickel-chromium-iron alloy containing niobium and molybdenum.
Mechanical properties: High strength, good toughness at 700℃, and corrosion resistance in high and low temperature environments.
Application: Suitable for manufacturing engine parts, turbine blades, high temperature heating furnace tubes and pipelines, etc.
| Inconel 625 | Inconel 718 | |
| Chemical Composition | ||
| Nickel (Ni) | High content, primary element | High content, primary element |
| Chromium (Cr) | 20-23% | 17-21% |
| Molybdenum (Mo) | 8-10% | 2.8-3.3% |
| Niobium (Nb) | 3.15-4.15% | 4.75-5.5% |
| Iron (Fe) | Up to 5% | Balance |
| Others | Al, Ti, Co | Al, Ti, Co, W |
| Physical Properties | ||
| Density | 8.44 g/cm³ | 8.19 g/cm³ |
| Melting Point | 1350°C | 1260-1320°C |
| Thermal Conductivity | Moderate, dependent on temperature | Moderate, dependent on temperature |
| Coefficient of Thermal Expansion | Relatively low, stable dimensions at high temps | Relatively low, stable dimensions at high temps |
| Electrical Resistivity | Moderate, increases with temperature | Moderate, increases with temperature |
| Magnetic Properties | Non-magnetic | Non-magnetic, may become slightly magnetic after cold working |
Note: The values provided are approximate and can vary based on specific material conditions, such as heat treatment and alloy composition variations.
