General Description
Inconel 625, a nickel-chromium-molybdenum alloy contains 9% Moly, serves effectively as both a corrosion resistant and heat resistant material. The combination of high-temperature strength and resistance to halogen attack, oxidation, and carburization has made alloy 625 a popular choice for chemical and petrochemical process equipment exposed to hostile, hightemperature environments.
The high alloy content of Inconel 625 enables it to withstand a wide variety of corrosive environments. The alloy is almost completely resistant to mild environments such as the atmosphere, fresh water and seawater, neutral salts, and alkaline media. In more severe environments, the combination of nickel and chromium provides resistance to oxidizing chemicals, and the combination of nickel and molybdenum provides resistance to reducing conditions. The molybdenum content also makes Inconel 625 highly resistant to pitting and crevice corrosion. The columbium stabilizes the alloy against sensitization and prevents intergranular corrosion. The high nickel content provides freedom from chloride stress-corrosion cracking.
Inconel 625 made by NiWire is made into chemical processing equipment, aircraft engine and airframe components, ship and submarine parts, nuclear reactors.
Chemical Composition
| Grade | Ni% | Cr% | Mo% | Nb+Ta% | Fe% | Al% | Ti% | C% | Mn% | Si% | Cu% | P% | S% |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inconel 625 | Min 58.0 | 20-23 | 8.0-10.0 | 3.15-4.15 | Max 5.0 | Max 0.4 | Max 0.4 | Max 0.1 | Max 0.5 | Max 0.5 | Max 0.5 | Max 0.015 | Max 0.015 |
Designations
UNS N06625
Werkstoff Nr. 2.4856
Specifications
Inconel 625 Wire: ASTM B446
Inconel 625 Bar: ASTM B446
Inconel 625 Forging: ASTM B564
Inconel 625 Pipe: ASTM B444/B704/B705
Inconel 625 Sheet/Strip: ASTM B443
Physical Properties
Density：8.4 g/cm3
Melting Point: 1290°C-1350 °C
Mechanical Properties
Annealing Treatment (Grade 1)
Tensile: Min 850 MPa
Yiled: Min 450 MPa
Elongation: Min 30%
Solution Treatment (Grade 2)
Tensile: Min 700 MPa
Yiled: Min 300 MPa
Elongation: Min 30%
Welding of Inconel 625
Any traditional welding procedures can be used to weld Inconel 625 to similar alloys or other metals, such as gas tungsten arc welding(GTAW), plasma arc welding (PAW), metal inertia gas welding (MIG) and so on. Before welding, remove scale, grease, mark and imprint. And no heat treatment needed before and after welding. Recommend filler wire regarding welding Inconel 625: ERNiCrMo-3