Detailed explanation of the advantages of nickel-based alloy 625 heat-treated round bar
Heat treating (rather than age hardening) nickel-based alloy 625 round bar enhances its excellent corrosion resistance (including pitting and crevice corrosion), high-temperature strength, and resistance to creep, oxidation, and carburization. This enables the material to maintain its ductility and toughness in harsh environments such as high-pressure chemical processes, seawater, and cryogenic conditions, providing exceptional durability.
What are the heat treatment methods for 625 alloy?
Alloy 625 has three heat treatment methods: 1) solution annealing (2000/2200°F) with air cooling or faster; 2) annealing (1600/1900°F) with air cooling or faster; and 3) stress relieving (1100/1500°F) with air cooling.
Physical properties of Inconel 625 bar
| Properties | Inconel 625 |
|---|---|
| Electrical conductivity (% IACS) | 1.34 |
| Melting Point (°F) | 2295 |
| Specific heat capacity | 0.098 |
| Thermal expansion (1/°F) | 0.00000711 |
| Density | 0.305 |
| Thermal conductivity (BTU-in/hr-ft²-°F) | 68 |
Nickel 625 round bar size chart
| Description | Manufacture Method | Diameter | Shape | Specification |
|---|---|---|---|---|
| 1.000 DIA | Hot Finished | 1.0000 | Rod/ Bar Round | ASME SB446 |
| .500 DIA | 0.5000 | CPW-A-5666 | ||
| .500 DIA | 0.5000 | ASME SB446 | ||
| .750 DIA | 0.7500 | ASME SB446 |
Chemical composition of Inconel 625 round bar
| Grade | C,Carbon | Cr,Chromium | Co,Carbon monoxide | Fe,Iron | Mo,Molybdenum | Ni,Nickel | Nb,Niobium | Ti,Titanium |
|---|---|---|---|---|---|---|---|---|
| 625 | <=0.10% | 21.5% | <=1.0% | <=3.0% | 9.0% | 65.05% | 3.65% | <=0.50%< /td> |
Advantages of Heat-Treated Alloy 625 Round Bar:
Excellent Corrosion Resistance: Alloy 625 exhibits excellent resistance to a wide range of corrosive environments, including strong acids and chloride-containing media.
High-Temperature Strength: Maintains high tensile strength and resistance to thermal creep deformation, even at extreme temperatures.
Oxidation and Carburization Resistance: The alloy is highly resistant to surface degradation caused by oxidation and carburization at elevated temperatures.
Chloride-Free Stress Corrosion Cracking: Its unique composition prevents chloride-induced cracking, a common problem in seawater applications.
Excellent Fatigue Strength: Alloy 625 exhibits excellent corrosion fatigue strength, making it suitable for applications subject to repeated stress cycles.
Good Weldability and Machinability: The material's ductility allows for easy welding and machining into complex shapes without sacrificing strength or corrosion resistance.
Cryogenic Toughness: Maintains high impact toughness even at extremely low temperatures, preventing brittle fracture in deepwater or LNG (liquefied natural gas) environments.
High Strength: The combination of nickel, molybdenum, and niobium provides significant mechanical strength and stiffness. No aging heat treatment required: Although 625 alloy requires heat treatment to obtain other properties, its strength does not require age hardening, which is a major advantage in manufacturing and use.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
