Comparison of Inconel 600 and Incoloy 825 pipes
Inconel 600 is a nickel-chromium alloy, ideal for high-temperature applications and resistant to corrosion from reducing acids such as sulfuric acid and hydrochloric acid; while Incoloy 825 is a nickel-iron-chromium alloy with better resistance to oxidizing acids (such as phosphoric acid) and chloride-containing environments. The main difference lies in the nickel content of Inconel 600, making it an excellent choice for corrosion resistance in acidic media; while the composition of Incoloy 825 gives it superior resistance to acids such as formic acid and acetic acid, making it suitable for chemical processing and marine applications.
What is the difference between Inconel 600 and Incoloy 800h?
Inconel is a nickel-chromium alloy, typically containing more than 50% nickel; while Incoloy is a nickel-iron-chromium alloy, containing less than 50% nickel. Incoloy 800 has a higher iron content and a lower nickel content, while Inconel 600 is cheaper.
Inconel 600 pipes
When Inconel 600 tubing is heated, a thick, stable oxide layer forms, protecting its outer surface from external corrosion. Therefore, Inconel 600 tubing is ideal for high-temperature, high-pressure applications where aluminum and steel exhibit thermal creep. Inconel tubing is available in various grades with slightly different chemical compositions, resulting in varying properties.
Basic applications of Inconel 600 tubing include heat-treated components and the food industry. Alloying with other alloying elements further enhances its stiffness and strength, enabling its use in harsh environments such as aerospace, chemical, and marine applications. With further alloying treatments, Inconel 600 tubing becomes the material of choice for demanding environments such as rocket engines, turbine blades, and critical components in the nuclear industry.
Chemical Composition of Inconel 600
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 72 min |
| Chromium (Cr) | 14-17 |
| Iron (Fe) | 6-10 |
| Carbon (C) | 0.15 max |
| Manganese (Mn) | 1 max |
| Silicon (Si) | 0.5 max |
| Sulfur (S) | 0.015 max |
| Copper (Cu) | 0.5 max |
Incoloy 825 pipes
Incoloy 825 steel pipe is relatively inexpensive and has a high iron content, making it a high-quality product even in applications requiring high temperatures but with relatively mild environmental conditions. Another advantage of Incoloy is its ease of machining; it can be processed using the same methods and equipment as stainless steel. Incoloy products are available in a variety of sizes and grades, and their main advantage lies in their resistance to strong corrosion, especially in aquatic environments. The basic type of Incoloy has a wide range of applications. It incorporates modifying elements, making it resistant to chemical and atmospheric corrosion, and even to physical corrosion such as cracking and pitting.
Incoloy 825 is particularly suitable for saltwater, high-chloride, seawater, and acidic gas environments. This makes it a preferred material for the oil and gas industry. Furthermore, the most specialized and ideal Incoloy alloys are widely used in a variety of harsh chemical environments, such as washing, nuclear fuel, acid, humid environments, and reactive furnace environments.
Chemical Composition of Incoloy 800
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 30-35 |
| Chromium (Cr) | 19-23 |
| Iron (Fe) | 39.5 min |
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 1.5 max |
| Silicon (Si) | 1 max |
| Sulfur (S) | 0.015 max |
| Aluminum (Al) | 0.15-0.60 |
| Titanium (Ti) | 0.15-0.60 |
Key Differences Between Inconel 600 and Incoloy 800
1. Chemical Composition
The most significant difference between Inconel 600 and Incoloy 800 lies in their chemical composition. Inconel 600 has a higher nickel content (minimum 72%), while Incoloy 800 has a more balanced composition of nickel, iron, and chromium.
Inconel 600: Primarily a nickel-chromium alloy with a high nickel content, exhibiting excellent corrosion resistance and oxidation resistance.
Incoloy 800: A nickel-iron-chromium alloy with a lower nickel content and a higher iron content, combining good high-temperature strength and corrosion resistance.
2. Mechanical Properties
Both alloys exhibit good mechanical properties at high temperatures, but due to their higher nickel content, Inconel 600 generally has higher strength at high temperatures.
| Property | Inconel 600 | Incoloy 800 |
|---|---|---|
| Tensile Strength | 550 MPa (80,000 psi) min | 450 MPa (65,000 psi) min |
| Yield Strength | 240 MPa (35,000 psi) min | 170 MPa (25,000 psi) min |
| Elongation | 30% min | 30% min |
| Melting Point | 1370-1425°C (2500-2600°F) | 1357-1385°C (2475-2525°F) |
Compared to Incoloy 800, Inconel 600 has higher tensile and yield strengths, making it more suitable for applications requiring high mechanical strength at high temperatures.
Incoloy 800 exhibits good creep resistance and stress fracture resistance, making it ideal for applications requiring prolonged exposure to high-temperature environments.
| Feature | Inconel 600 | Incoloy 825 |
|---|---|---|
| Base Composition | Nickel-Chromium | Nickel-Iron-Chromium |
| Nickel Content | > 50% | < 50% |
| Primary Resistance | High temperature, acids (sulfuric, hydrochloric) | Sulfuric and phosphoric acids, chloride-containing media |
| Typical Applications | Chemical processing, high-temperature systems | Chemical processing, nuclear, marine |
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 is a supplier of GH4169 alloy, offering a wide range of products including: seamless pipe (sizes: 4-219 mm; thickness: 0.5-20 mm); welded pipe (sizes: 5.0-1219.2 mm; thickness: 0.5-20 mm); plates (thickness: 0.1 to 100 mm; width: 10-2500 mm); strips; alloy round bars (diameter: 3-800 mm); flat bars (thickness: 2-100 mm; width: 10-500 mm); hexagonal bars (size: 2-100 mm); wire rods; and extruded profiles. We collaborate with steel mills to provide our customers with GH4169 alloy products that meet or exceed numerous leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN, and BS standards.
Gnee Steel stocks and sells GH4169, pipes, plates, strips, round bars, flat bars, forged billets, hexagonal steel, wire rods, and extruded profiles. Please feel free to contact us at ss@gneesteel.com for a quote.
