Comparison of Inconel 600 and Incoloy 825 pipes
Comparison of Inconel 600 and Incoloy 825 pipes
Inconel 600 and Incoloy 825 are both nickel-based alloys, but their compositions and applications differ. Inconel 600 is a high-nickel alloy with excellent high-temperature strength and resistance to a variety of corrosive substances, such as acids. Incoloy 825 is a nickel-iron-chromium alloy, with a greater emphasis on resistance to specific acids (such as sulfuric acid and phosphoric acid), high-temperature oxidation, and carburization.
What are the standard pipe materials for Inconel 600?
These pipe materials conform to ASTM B167, B829, and B517 standards. Sizes vary depending on the ASTM, ASME, and API standards. Seamless Inconel 600 pipes range in diameter from 4mm to 219mm, while welded and arc-welded pipes range in diameter from 5mm to 1219.2mm, with wall thicknesses ranging from 0.5mm to 20mm.
Comparison Table
| Aspect |
Inconel 625 Pipe |
Incoloy 825 Tube |
|---|---|---|
| Nickel Content (%) | 58 min | 38–46 |
| Chromium (%) | 20–23 | 19.5–23.5 |
| Molybdenum (%) | 8–10 | 2.5–3.5 |
| Iron (%) | 5 max | 22 min |
| Copper (%) | - | 1.5–3.0 |
| Titanium (%) | - | 0.6–1.2 |
| Yield Strength (MPa) | Above 1300 | 199–207 |
| Ultimate Tensile Strength (MPa) | 827–930 | 505–514 |
| Elongation (%) | 30–45 | 49.7–57.5 |
| Hardness (Rockwell C) | 20–40 | 20–30 |
| Temperature Resistance | Excellent at high temperatures | Stable up to 870–1149°C |
| Corrosion Resistance | Outstanding (marine/chemical, acids, saltwater) | Excellent (acids, chlorides, seawater) |
| Weldability | Superior, low risk of cracking | Good, but sensitive to welding parameters |
| Typical Applications | Turbine blades, combustion chambers, power gen | Chemical processing, pipelines, heat exchangers |
| Cost | Higher | Lower |
Inconel 625 Pipe vs Incoloy 825 Tube Mechanical Properties
Strength
| Property | Inconel 625 | Incoloy 825 |
|---|---|---|
| Tensile Strength | ~930 MPa | ~550 MPa |
| Yield Strength | ~517 MPa | ~220 MPa |
| Elongation | ~42.5% | ~30% |
| Density | 8.4 g/cm³ | 8.14 g/cm³ |
Inconel 600 Tubing
When heated, Inconel 600 tubing forms a thick, stable oxide layer, 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. With alloying, its stiffness and strength are further enhanced, enabling its use in demanding applications such as aerospace, chemical, and marine industries. Further alloying makes Inconel 600 tubing a preferred material for harsh environments such as rocket engines, turbine blades, and critical components in the nuclear industry.
Incoloy 825 Steel Tubing
Incoloy 825 steel tubing is relatively inexpensive and has a high iron content, making it a high-quality product even in applications requiring high temperatures and harsh environmental conditions. Another advantage of Incoloy is its ease of machining, allowing it to be processed using the same methods and equipment as stainless steel. Incoloy products are available in a variety of sizes and grades, with its main advantage being its resistance to severe corrosion, especially in aquatic environments. Basic Incoloy steel pipes have a wide range of applications. Modifying elements are added to make them resistant to chemical and atmospheric corrosion, and even to physical corrosion such as cracking and pitting.
Furthermore, it performs excellently in brine, high-chloride, seawater, and acidic gas environments. This makes it a preferred material for the oil and gas industry. However, the most specialized and ideal Incoloy alloys are widely used in a variety of harsh chemical environments, including scrubbing, nuclear fuel, acid, moisture, and furnace reaction environments.
Comparison: Inconel 600 vs. Incoloy 825
| Feature | Inconel 600 | Incoloy 825 |
|---|---|---|
| Primary Composition | High nickel-chromium (over 50% nickel) | Nickel-iron-chromium (less than 50% nickel) |
| Corrosion Resistance | Excellent resistance to acidic environments (e.g., hydrochloric, sulfuric) and caustic alkalis | Excellent resistance to sulfuric and phosphoric acids, high-temperature oxidation, and carburization |
| High-Temperature Performance | Good mechanical properties up to 2000°F (1093°C) | Superior high-temperature strength and stability |
| Key Applications | Chemical processing, caustic alkalis production, high-pressure applications | Chemical processing, nuclear fuel reprocessing, and equipment exposed to acids and high temperatures |
| Strength | Strong at lower temperatures, with strength decreasing at higher temperatures | Superior strength and stability at elevated temperatures |
Why Choose Gnee Nickel Alloy (Supplier Example)?
✅ Large stock of Incoloy alloy tubes/bars/plates/fittings/coils, fast shipping.
✅ Factory direct sales, highly competitive prices, excellent value for money.
✅ Comprehensive quality assurance: Material Testing Certificate (MTC), chemical composition certificate, and mechanical property certificate.
✅ Value-added services: slitting, cutting, polishing, surface treatment.
✅ Worldwide shipping, secure and reliable packaging, and provision of export-required documents.
Email: ss@gneemetal.com
Gnee Steel is a supplier of Inconel 600 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 Inconel 600 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 Inconel 600, 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.
