Inconel625 Material introduction
Inconel625（UNS NO6625/W.Nr.2.4856）Nickel chromium alloy is widely used because of its high strength, excellent machinability (including welding) and excellent corrosion resistance. Use the temperature range from low temperature to 1800 ° F (982 ° C). The strength of Inconel 625 alloy is caused by the hardening effect of molybdenum and niobium in the nickel chromium matrix, so the alloy does not need precipitation hardening treatment. This combination of elements is also the reason for the super corrosion resistance of materials in many strong corrosion environments and the oxidation resistance and carburization resistance in high temperature environments.
Inconel625 chemical composition
element | C | Cr | Ni | Co | Mo | Al | Ti |
mass fraction／% | ≤0.1 | 20.0-23.0 | more than | ≤1.0 | 8.0-10.0 | ≤0.4 | ≤0.4 |
element | Fe | Nb | Si | Mn | S | P | Cu |
mass fraction／% | ≤5.0 | 3.15-4.15 | ≤0.5 | ≤0.5 | ≤0.015 | ≤0.015 | ≤0.07 |
Inconel625 Physical and mechanical properties
density | melting point |
8.4g/cm3 | 1290-1350℃ |
varieties | Heat treatment method | tensile strength
σb/MPa | yield strength
σp0.2/MPa | Elongation
δ5/% | Shrinkage Ψ/% | Brinell hardness HBS |
Plate and strip | Solution treatment | 830 | 415 | 30 | - | 150-220 |
Bar | Solution treatment | 830 | 415 | 30 | - | 150-220 |
Inconel625 Heat treatment system
A)Bars and forgings，（1090-1200）℃X(1.5-2)h/WQ；
B)Silk material，(1090-1200)℃／≥Air cooling rate，among d≤3nun，heat preservation(9-15)min;d3mm-5mm，heat preservation(15-20)min;
C)Hot rolled plate，(950-1030)℃/AC，HB≤305hV;
D)Weldment, stress annealed：（1080-1100)℃／≥Air cooling rate，among d(δ)≤3mm，heat preservation (9-15)min;d0.3mm-5mm，heat preservation (15-20) min；
Main specifications d8mm-300mm Bar；δ4mm-14mm Hot rolled plate；δ0. 5mm-4mm Cold rolled sheet；external diameter 6mm-150mm Seamless (welded) pipe.
