Does Inconel 600 round bar have better performance than Incoloy 800 round bar?
Inconel 600 round bars, due to their higher nickel content, generally exhibit superior high-temperature strength and oxidation resistance, making them more suitable for harsh operating conditions. Incoloy 800 bars, containing more iron, are less expensive and perform excellently in high-temperature creep resistance, making them a cost-effective choice for applications that are not extreme but still have high requirements (such as carburizing). Neither is absolutely "better" than the other; Inconel 600 bars are a premium material for extreme high-temperature/corrosive (acid, chloride) environments, while Incoloy 800 alloy bars strike a balance between cost-effectiveness and performance in high-temperature industrial applications. Therefore, the choice of material depends on the specific application.
Is Inconel 600 better than stainless steel 304?
Stainless steel 304 is a versatile and cost-effective general-purpose material, while Inconel 600 offers superior performance under extreme conditions. Understanding the properties and applications of these materials will help you choose the right alloy for your needs.
Inconel 600 bar stock is a rod-shaped profile made from a high-performance nickel-chromium-iron alloy (Inconel 600). It possesses excellent high-temperature oxidation resistance (up to approximately 1150°C), superior resistance to chloride stress corrosion cracking, and good machinability. It is primarily used in the manufacture and processing of shafts, valve parts, furnace components, and corrosion-resistant structural components that operate in extreme high-temperature and corrosive environments. It is a core raw material for high-reliability critical components in the chemical, nuclear power, heat treatment, and aerospace industries.
Incoloy 800 bar stock is a rod-shaped profile made from a nickel-iron-chromium austenitic alloy (Incoloy 800/800H/800HT). Its core characteristics include excellent creep resistance, carburization resistance, and high-temperature oxidation resistance at elevated temperatures (up to approximately 815°C), while maintaining good strength and thermal stability. It is specifically used in the manufacture and processing of high-temperature heat treatment furnace components, petrochemical cracking tubes, industrial heaters, and nuclear power steam generators-critical components that require long-term exposure to high-temperature corrosive atmospheres and mechanical stress. It is a specialized high-performance raw material for addressing high-temperature oxidation and thermal fatigue issues.
Inconel Alloy 600 Bar vs Incoloy Alloy 800 Rod Chemical Composition
| Element | Inconel 600 Bar | Incoloy 800 Bar |
|---|---|---|
| Nickel | 72.0 min. % | 30.0 – 35.0 % |
| Chromium | 14.0 – 17.0 % | 19.0 – 23.0 % |
| Iron | 6.00 – 10.00 % | 39.5 min. % |
| Carbon | 0.15 max. % | 0.10 max. % |
| Manganese | 1.00 max. % | 1.50 max. % |
| Sulfur | 0.015 max. % | 0.015 max. % |
| Silicon | 0.50 max. % | 1.0 max. % |
| Copper | 0.50 max. % | 0.75 max. % |
| Aluminum | – | 0.15 – 0.60 % |
| Titanium | – | 0.15 – 0.60 % |
| Inconel 600 Rod | Incoloy 800 Rod | |
|---|---|---|
| Density, g/cm³ | 8.47 | 7.94 |
| Density, lb/in.³ | 0.306 | 0.287 |
| Melting Range, °F | 2470-2575 | 2475-2525 |
| Melting Range, °C | 1354-1413 | 1357-1385 |
| Curie Temperature, °F | -192 | -175 |
| Curie Temperature, °C | -124 | -115 |
Corrosion Resistance Comparison of Inconel 600 and Incoloy 800 Alloy Rod
Incoloy 800 Bar contains more iron and less nickel than Inconel 600 Bar in order to reduce costs. The lower nickel content reduces its corrosion resistance.
To compensate for this, Incoloy 800 Bar contains more chromium to enhance its oxidation resistance. It also contains aluminum, further improving its high-temperature corrosion resistance.
In summary, Inconel 600 Bar has superior oxidation resistance compared to Incoloy 800 Bar.
Mechanical Properties Comparison of Inconel 600 and Incoloy 800 Alloys Bar
Both Inconel 600 Bar and Incoloy 800 Rod are solid-solution strengthened alloys, primarily relying on chromium and iron for strengthening.
In these alloys, the solid-solution strengthening elements are dissolved in the austenitic matrix, and the amount of austenite is crucial to their strengthening effect. A higher nickel content helps the alloy form more austenitic structures.
Although Incoloy 800 Rod contains additional strengthening elements, its higher iron content and lower nickel content compared to Inconel 600 Rod result in a lower proportion of austenite.
Therefore, generally speaking, Inconel 600 Rod has superior mechanical properties compared to Incoloy 800 Rod.
Inconel Alloy 600 Rod vs Incoloy Alloy 800 Rod Main Standards
| Product Type | Inconel 600 Standards | Incoloy 800 Standards |
|---|---|---|
| Condenser and Heat Exchanger Tube | ASTM B163 | ASTM B163 |
| Seamless Pipe and Tube | ASTM B167, ASTM B829 | ASTM B407, ASTM B829 |
| Welded Pipe | ASTM B517, ASTM B775 | ASTM B514, ASTM B775 |
| Welded Tube | ASTM B516, ASTM B751 | ASTM B515, ASTM B751 |
| Welded Fittings | ASTM B366 | ASTM B366 |
| Rod, Bar, and Wire | ASTM B166 | ASTM B408 |
| Forgings | ASTM B564 | ASTM B564 |
| Plate, Sheet, and Strip | ASTM B168, ASTM B906 | ASTM A240, ASTM A480, ASTM B409, ASTM B906 |
Comparison of Inconel 600 Round Bar and INCOLOY 800 Alloy Bar
Now that we have a clear understanding of the characteristics of these two materials, let's compare them in detail.
Temperature Resistance
Inconel 600 Bar: This alloy can withstand high temperatures up to 2000°F (1093°C). It maintains its strength at high temperatures and does not melt or deform.
INCOLOY 800 Bar: This alloy can withstand high temperatures up to 1500°F (816°C). While this temperature is also high, it is lower than the temperature resistance limit of Inconel 600 bars.
Winner: Inconel 600 bars are more suitable for extremely high-temperature environments.
Corrosion Resistance
Inconel 600 Bar: This alloy has excellent corrosion resistance in many harsh environments. It can withstand corrosion from acids, solvents, and marine environments.
INCOLOY 800 Round Bar: This alloy also has good corrosion resistance, especially against oxidation and sulfide corrosion. However, its corrosion resistance range is not as broad as that of Inconel 600 alloy bars.
Winner: Inconel 600 forged bars again stand out in terms of corrosion resistance, especially in various harsh environments.
Strength and Toughness
Inconel 600 Bar: It maintains its strength under high temperatures and pressures. It is very strong but prone to fracture.
INCOLOY 800 Round Bar: INCOLOY 800 bars are also very strong, but are known for their good toughness and ability to maintain their shape. Its strength may not be as high as that of Inconel 600 forged bars, but it is more stable.
Winner: Tie. Inconel 600 bars are stronger, but INCOLOY 800 bars are more stable.
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 600 products in various sizes and specifications. Please send us your drawings for a quote!
