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Inconel 625 is a corrosion and oxidation resistant nickel alloy that is used both for its high strength and outstanding aqueous corrosion resistance. Its outstanding strength and toughness is due to the addition of niobium which acts with the molybdenum to stiffen the alloy’s matrix. Alloy 625 has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions. This nickel alloy has excellent weldability and is frequently used to weld AL-6XN. This alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Some typical applications Inconel 625 is used in are chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors.
Inconel625 (UNS NO6625/W.Nr.2.4856/NiCr22Mo9Nb) CHEMICAL COMPOSITION
| % | C | Mn | Si | S | P | Cu | B | Fe | ||||||||
| Min | ||||||||||||||||
| Max | 0.1 | 0.5 | 0.5 | 0.015 | 0.015 | 0.07 | 5 | |||||||||
| % | Co | Mo | Nb | Cr | Ni | Al | Ti | |||||||||
| Min | 8 | 3.15 | 20 | Bal | ||||||||||||
| Max | 1 | 10 | 4.15 | 23 | 0.4 | 0.4 | ||||||||||
Inconel625 (UNS NO6625/W.Nr.2.4856/NiCr22Mo9Nb) Heat treatment
Bar：950～1030℃，Air cool or water cool；or 1090～1200℃，Air cool or water cool,solution treatment
Plate：950～1030℃，Air cool；or 1090～1200℃，air cool.
Tube：recommended annealing temperature：960～1030℃，Air cool or water cool
Inconel625 (UNS NO6625/W.Nr.2.4856/NiCr22Mo9Nb) MECHANICAL PROPERTIES
| Density | Melting | Heat treatment | Tensile strength | Yield strength | Elongation | Reduction of area | Brinell Hardness | |||||||||
| g/cm3 | ℃ | σb/MPa | σp0.2/MPa | σ5 /% | φ/ % | HBS | ||||||||||
| 8.44 | 1290 | Bar | ≥830 | ≥410 | ≥30 | ≥290 | ||||||||||
| 1350 | Solution treatment | |||||||||||||||
