Comparison of Annealed Nickel 600 and Monel 400
Comparison of Annealed Nickel 600 and Monel 400
Annealed Inconel 600 is a nickel-chromium alloy suitable for high-temperature, high-strength applications; while Monel 400 is a nickel-copper alloy, ideal for marine and chemical applications due to its excellent corrosion resistance in specific environments. Inconel 600 has a higher maximum operating temperature (up to 982°C or 1800°F) and strength, while Monel 400 has a maximum operating temperature of approximately 600°C (1112°F), but performs well in brine and reducing acids such as hydrofluoric acid and sulfuric acid.
What are the differences between Inconel 600 and Monel 400?
Inconel 600 performs excellently in high-temperature applications due to its ability to maintain good mechanical properties and corrosion resistance even at high temperatures. Monel 400, on the other hand, is more suitable for low-temperature environments where corrosion resistance and ductility are crucial.
Chemical Composition Comparison: Annealed Nickel 600 vs Monel 400
| Element | Annealed Nickel 600 (UNS N06600) | Monel 400 (UNS N04400) |
|---|---|---|
| Nickel (Ni) | ≥ 72.0 % | 63.0 – 70.0 % |
| Copper (Cu) | ≤ 0.50 % | 28.0 – 34.0 % |
| Iron (Fe) | 6.0 – 10.0 % | ≤ 2.5 % |
| Manganese (Mn) | ≤ 1.0 % | ≤ 2.0 % |
| Carbon (C) | ≤ 0.15 % | ≤ 0.30 % |
| Silicon (Si) | ≤ 0.50 % | ≤ 0.50 % |
| Sulfur (S) | ≤ 0.015 % | ≤ 0.024 % |
| Chromium (Cr) | 14.0 – 17.0 % | – |
| Aluminum (Al) | ≤ 0.30 % (typical) | – |
| Titanium (Ti) | ≤ 0.30 % (typical) | – |
| Cobalt (Co) | – | – |
| Molybdenum (Mo) | – | – |
| Other Elements | ≤ 0.30 % | – |
Corrosion Resistance: Annealed Nickel 600 vs Monel 400
| Environment | Annealed Nickel 600 (UNS N06600) | Monel 400 (UNS N04400) |
|---|---|---|
| Seawater / Marine | Excellent (resists pitting, crevice, chloride SCC) | Excellent (highly resistant; widely used in marine applications) |
| Hydrochloric Acid | Good in dilute, aerated solutions | Excellent in all concentrations (including reducing conditions) |
| Sulfuric Acid | Good in dilute, aerated conditions | Excellent in all concentrations (superior reducing acid resistance) |
| Caustic / Alkaline | Excellent (including hot concentrated alkalis) | Good (but may suffer stress corrosion in hot concentrated caustics) |
| Chlorine / Hypochlorite | Excellent (including dry chlorine at high temperature) | Good in wet chlorine; not recommended for dry chlorine |
| Ammonia / Amines | Excellent | Poor (susceptible to stress corrosion cracking) |
| Hydrofluoric Acid | Not recommended | Excellent (commonly used in HF service) |
| Organic Acids | Excellent (acetic, formic, etc.) | Excellent |
| High-Temperature Oxidation | Excellent (up to ~1095°C) | Poor (significant oxidation above ~540°C) |
| Reducing Atmospheres | Good | Excellent (due to high nickel-copper composition) |
| Flue Gas / Sulfur Compounds | Good | Good (but may sulfide above ~480°C) |
| Chloride Stress Corrosion Cracking (SCC) | Highly resistant | Resistant in most chloride environments, but less than Nickel 600 in hot concentrated chlorides |
| Feature | Nickel 600 (Inconel 600) | Monel 400 |
|---|---|---|
| Composition | Nickel-chromium alloy | Nickel-copper alloy |
| High-Temperature Use | Excellent; maintains strength at high temperatures (above 1000°C) | Moderate; suitable for temperatures up to 540°C |
| Corrosion Resistance | Excellent resistance to high temperatures, oxidation, and chloride stress corrosion cracking | Excellent resistance to seawater and non-oxidizing acids |
| Applications | Furnace components, turbine blades, high-pressure steam systems, and high-temperature reactors | Marine systems, oil extraction, heat exchangers, and chemical processing where saltwater and acids are present |
| Melting Point | 1354 – 1413°C (2470 – 2575°F) | 1300 – 1350°C (2370 – 2460°F) |
| Density | 8.47 g/cm³ (0.306 lb/in³) | 8.80 g/cm³ (0.318 lb/in³) |
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!
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.
