Alloy 725, otherwise known as iconel® 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.
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| % | 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 |
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.
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 | - |
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