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Nickel Alloy 725 / Inconel 725®
Technical Data Sheet
Alloy 725 (UNS N07725) is a nickel-chromium-molybdenum-niobium alloy that is highly resistant to corrosion and has been age hardened for extremely high strength twice that of annealed alloy 625. Alloy 725 strength is developed by heat treatment rather than by cold work this also enables strength to be imparted to large non-uniform sections that cannot be strengthened by cold works. Alloy 725 is used for hangers, landing nipples and high strength fasteners in marine applications.
| Chemical Composition Limits | ||||||||||||
| Weight% | Ni | Cr | Mo | Nb | Ti | Al | C | Mn | Si | P | S | Fe |
| Alloy 725 | 55.0-59.0 | 19.0 -22.5 | 7.0-9.5 | 2.75-4.0 | 1.0-1.7 | 0.35 max | 0.03 max | 0.35 max | 0.20 max | 0.015 max | 0.010 max | Rem |
Typical Mechanical Properties
| Material | Form and Condition | Yield Strength (0.2% Offset) | Tensile Strength | Elongation % | Hardness, Rc | ||
| ksi | MPa | ksi | MPa | ||||
| Alloy 725 round | Annealed | 62.0 | 427 | 124.0 | 855 | 57 | 5 |
| Alloy 725 round | Age Hardened | 133.0 | 917 | 180.0 | 1241 | 30 | 36 |
| Transverse Specimens from hot-finished rounds of 4.0 to 7.5 in (102 to 190mm) diameter | |||||||
Availability
Alloy 725 is available in Bar, Round Bar, Flat Bar, Forging Stock. Contact Sales for further availability.
Specifications
Bar and Wire ASTM B 805, ASME Code Case 2217
Bar and Forging Stock SMC Specification HA91, ASME Code Case 2217
UNS N07725
FMC Spec M40504
NACE MR-0175/ ISO 15156
Inconel 725 (trademark)
