Comparison of Inconel 600 bolts and Inconel 601 bolts
Comparison of Inconel 600 bolts and Inconel 601 bolts
Inconel 600 bolts offer better overall corrosion resistance and stress corrosion cracking resistance, as well as good formability. Inconel 601 bolts, due to the addition of aluminum and a higher chromium content, exhibit superior high-temperature oxidation resistance, although the tensile strength of the 600 alloy is generally higher in some specifications. For lower temperature, highly corrosive environments (such as those containing chlorides), Inconel 600 should be chosen; while for higher temperature, severely oxidizing conditions, such as in furnaces or exhaust systems, Inconel 601 should be selected, with the choice depending on performance requirements and cost considerations.
Is Inconel 601 magnetic?
Inconel 601 is a non-magnetic nickel-chromium alloy. Its properties include high-temperature strength comparable to 18-8 alloys and high corrosion resistance to organic and inorganic corrosive agents. Alloy 601 performs exceptionally well across a temperature range from cryogenic temperatures to 2000°F.
What are Inconel 600 fasteners?
Inconel 600 fasteners are nickel-chromium alloy fasteners that possess excellent heat resistance, oxidation resistance, and corrosion resistance. This makes them ideal for high-temperature applications and therefore widely used in the aerospace and chemical industries. Inconel 600 fasteners are strong and durable, making them an ideal choice for applications requiring high strength and reliability.
What are Inconel 601 fasteners?
Inconel 601 is a nickel-chromium-iron alloy with added aluminum. This alloy is known for its exceptional high-temperature corrosion and oxidation resistance. It is strong, ductile, and maintains its mechanical properties under extreme conditions. Inconel 601 fasteners are used in applications such as heat treatment baskets and fixtures, chemical production, and gas turbine components.
Chemical composition of Inconel 600 and Inconel 601 bolts
| Element | Inconel 601 Bolts (UNS N06601) | Inconel 600 Bolts (UNS N06600) |
|---|---|---|
| Nickel (Ni) | 58.0 – 63.0 % | ≥ 72.0 % |
| Chromium (Cr) | 21.0 – 25.0 % | 14.0 – 17.0 % |
| Iron (Fe) | Balance | 6.0 – 10.0 % |
| Aluminum (Al) | 1.0 – 1.7 % | – |
| Carbon (C) | ≤ 0.10 % | ≤ 0.15 % |
| Manganese (Mn) | ≤ 1.0 % | ≤ 1.0 % |
| Silicon (Si) | ≤ 0.5 % | ≤ 0.5 % |
| Copper (Cu) | ≤ 1.0 % | ≤ 0.5 % |
| Titanium (Ti) | ≤ 0.15 % | – |
| Sulfur (S) | ≤ 0.015 % | ≤ 0.015 % |
High-temperature resistance comparison of Inconel 600 and Inconel 601 bolts
| Property / Condition | Inconel 601 Bolts | Inconel 600 Bolts |
|---|---|---|
| Max Continuous Service Temperature (in Air) | ~1250°C | ~1100°C |
| Short‑Term Peak Temperature (in Air) | ~1300°C | ~1150°C |
| Oxidation Limit (Continuous) | Excellent up to 1250°C | Good up to 1100°C |
| Carburization Limit (Continuous) | Good up to 1150°C | Moderate up to 1000°C |
| Creep‑Resistance Limit (for 100,000 h life) | ~1050°C | ~900°C |
| Thermal‑Fatigue Resistance Limit | Excellent up to 1200°C | Good up to 1000°C |
| Recommended Max Operating Temperature (Bolted Joints) | ~1100°C | ~950°C |
| Scaling / Spalling Resistance Limit | Excellent up to 1250°C (high Al content) | Good up to 1100°C |
| Sulfidation Limit (in reducing‑sulfidizing atmospheres) | Good up to 950°C | Moderate up to 850°C |
| Chlorination Limit (in dry chlorine) | Good up to 700°C | Good up to 650°C |
Both Inconel 600 and Inconel 601 bolts exhibit good high-temperature oxidation resistance. The main difference is that Inconel 600 bolts have a maximum operating temperature of 2000°F, while Inconel 601 bolts can be used at higher temperatures up to 2200°F. Furthermore, Inconel 601 bolts perform well under cyclic temperature conditions.
Another material suitable for cyclic temperature conditions is Alloy 330, which offers excellent oxidation and carburization resistance at temperatures up to 2100°F. In addition, Alloy 330 bolts are known for their superior performance under extreme temperature cycling conditions.
Inconel 600 and Inconel 601 Bolt Applications
Inconel 600 and Inconel 601 bolts have different application areas. Inconel 600 bolts are used in applications such as aircraft piping systems, heat exchangers, and chemical processing equipment. In contrast, Inconel 601 bolts are used in applications requiring high-temperature resistance, such as power plants, petrochemical plants, and heat treatment equipment.
Selection Considerations
Several factors should be considered when choosing between Inconel 600 and Inconel 601 bolts, including the application, operating conditions, and environmental conditions. If the application requires high-temperature resistance and excellent corrosion and oxidation resistance, Inconel 601 bolts are a better choice. However, if the application requires good strength and durability, Inconel 600 bolts are preferable.
Conclusion
Inconel fasteners are becoming increasingly popular in industries requiring high-temperature resistance and excellent corrosion and oxidation resistance. Depending on your specific needs, both Inconel 600 and Inconel 601 bolts are excellent choices. By considering the application, operating conditions, and environmental conditions, you can determine which material is best suited for your needs. Ultimately, both Inconel 600 and Inconel 601 bolts are specialty alloys that perform exceptionally well in high-temperature applications.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
📦 Packaging and Shipping
All stainless steel products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Steel also supplies custom Inconel 601 products in various sizes and specifications. Please send us your drawings for a quote!
