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INCONEL alloy 725 (UNS N07725) is a nickel-chromium-molybdenum-niobium alloy that is highly resistant to corrosion and is age hardenable for extremely high strength. It has essentially the same corrosion resistance as INCONELalloy 625, which is widely used in a broad range of severely corrosive environments.The strength of age-hardened INCONEL alloy 725 is of the order of twice that of annealed alloy 625. Because the strength of alloy 725 is developed by heat treatment,not by cold work, ductility and toughness remain high.Also, strength can be imparted to large or non-uniform sections that cannot be strengthened by cold work
INCONEL alloy 725 (UNS N07725) CHEMICAL COMPOSITION
| Ni | Cr | Fe | Mo | P | S | Al | Mn | Si | C | Nb | Ti | |
| Min | 55 | 19 | 7.9 | 2.75 | 1.0 | |||||||
| Max | 59 | 22.5 | Bal | 9.5 | 0.015 | 0.01 | 0.35 | 0.35 | 0.2 | 0.03 | 4 | 1.7 |
INCONEL alloy 725 (UNS N07725) MECHANICAL PROPERTIES
| Density | Melting℃ | ||||
| 8.31 | 1271-1343 |
| Form | Condition | Tensile strength Mpa | Yield strength Mpa | Elongation | Hardness Rc |
| Round a | Annealed | 855 | 427 | 57 | 5 |
| Age hardened | 1241 | 917 | 30 | 36 | |
| Round b | Age hardened | 1241 | 903 | 31 | 36 |
| Tube | Annealed | 783 | 334 | 60 | 5 |
| Age hardened | 1268 | 921 | 27 | 39 |
INCONEL alloy 725 (UNS N07725) Spec.NO.
Bar and wire - ASTM B 805, ASME Code Case 2217
Bar and forging stock - SMC specification HA91, ASME Code Case 2217
