Alloy 725, otherwise known as inconel® 725 is a combination of nickel, chromium, molybdenum, niobium and titanium.
This high-strength, nickel-chromium-based superalloy is known for its excellent corrosion resistance and remarkable mechanical properties. It’s age-hardened, doubling the strength of an annealed Alloy 625.
| % | C | Si | Mn | P | S | Cr | Ni | Mo | Nb+Cb | Ti | Fe | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | 19 | 55 | 7 | 2.75 | 1 | Balance | - |
| Max | 0.03 | 0.20 | 0.35 | 0.015 | 0.010 | 22.50 | 59 | 9.50 | 4 | 1.70 | Balance | 0.35 |
Corrosion Resistance: Alloy 725 offers outstanding resistance in corrosive environments, including chlorides, sulfides, and seawater. This makes it particularly valuable in industries where exposure to harsh chemicals is routine. ** High-Temperature Stability**: The alloy maintains its strength and structural integrity at elevated temperatures, for applications involving extreme heat. Its ability to resist oxidation and thermal fatigue ensures long-term performance in high-temperature settings.
Mechanical Strength: With its superior tensile and yield strengths, Alloy 725 is designed to endure significant mechanical stress without compromising its structural integrity. This strength makes it suitable for heavy-duty applications where durability is essential.
| Mechanical & Physical Properties | 21.1°C | 93.3°C | 148.9°C | 204.4°C | 315.6°C | 371.1°C | 426.7°C | 537.8°C | 648.9°C | 982°C |
|---|---|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength /Mpa * | 1254 | 1230 | 1189 | 1170 | 1099 | 1096 | 1106 | 1058 | - | - |
| 0.2% Yield Strength /Mpa * | 892 | 868 | 826 | 824 | 782 | 798 | 818 | 778 | - | - |
| Reduction of area % * | 48.4 | 47 | 50.2 | 52.4 | 54.2 | 53.4 | 49.6 | 47.7 | - | - |
| Elongation % * | 32 | 29.6 | 30.9 | 30.7 | 32.4 | 30.8 | 29.6 | 31 | - | - |
| Coefficient of Thermal Expansion /µm/m°C | - | 13 | - | 13.1 | 13.4 | 13.7 | - | 14.1 | 14.4 | - |
| Thermal Conductivity /kcal/(hr.m.°C) | 9.143 | 10.082 | 10.89 | 11.709 | 13.235 | 14.058 | 14.864 | 16.22 | 18.24 | 21.57 |
| Modulus of Elasticity / GPa | 204 | 200 | - | 194 | 188 | 182 | - | 177 | 169 | - |
Developed to withstand the most demanding environments, this alloy is engineered to perform reliably under extreme conditions, making it an indispensable material in various high-stress applications.
Exceptional Corrosion Resistance: Alloy 725 excels in harsh chemical environments, resisting chlorides, hydrogen sulfide, and other corrosive agents, ensuring long-term reliability and durability.
High-Temperature Stability: It maintains its mechanical properties at elevated temperatures, making it ideal for high-heat applications like aerospace engines, industrial furnaces, and power generation equipment. Superior Mechanical Strength With high tensile and yield strengths, Alloy 725 withstands significant mechanical stress, making it perfect for downhole tools, high-strength fasteners, and other high-stress applications.
Longevity and Cost Efficiency: Its corrosion resistance and durability lead to extended service life, reduced downtime, and lower maintenance costs, providing significant long-term savings and operational efficiencies. Versatility in Applications Suitable for various industries, Alloy 725 is used in subsea and downhole equipment, reactors, heat exchangers, and aerospace components, proving reliable in demanding conditions.
Inconel® is the trademark of Special Metals Corporation
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