Nickel 601 vs Monel 400
Nickel 601 vs Monel 400
Nickel alloy 601 (Inconel 601) performs exceptionally well in high-temperature oxidation and carburizing environments (up to 2200°F/1200°C) and exhibits excellent thermal cycling resistance, making it commonly used in heat treatment and power generation applications. Monel 400, on the other hand, is a nickel-copper alloy best suited for marine environments and hydrofluoric/sulfuric acid environments. It offers good strength in a temperature range from sub-zero temperatures to approximately 1000°F (538°C) and is resistant to seawater corrosion. It is less expensive than alloy 601, but its heat resistance is not as good. The main difference between the two is that alloy 601 is rich in chromium, making it resistant to high temperatures, while Monel 400 is rich in copper, making it resistant to marine environments and acid corrosion.
Does Monel 400 alloy undergo work hardening?
MONEL nickel-copper alloy 400 (UNS N04400/W.Nr. 2.4360 and 2.4361) is a solid-solution alloy that can only be hardened through cold working. It exhibits high strength and toughness over a wide temperature range and possesses excellent corrosion resistance in a variety of corrosive environments.
Monel Alloy 400
MONEL nickel-copper alloy 400 (UNS N04400 / W.Nr. 2.4360 and 2.4361) is a solid-solution alloy that can only be strengthened by cold working. It exhibits high strength and toughness over a wide temperature range and offers excellent corrosion resistance in a variety of corrosive environments.
Inconel Alloy 600
INCONEL (nickel-chromium-iron) alloy 600 (UNS N06600 / W.Nr. 2.4816) is a standard engineering material suitable for applications requiring corrosion and high-temperature resistance. This alloy also possesses excellent mechanical properties, combining high strength with good workability.
Monel Alloy 400 & Nickel 601 Chemical Composition
| Element | Inconel 601 (UNS N06601) | Monel 400 (UNS N04400) |
|---|---|---|
| Nickel (Ni) | 58.0 – 63.0 % | ≥ 63.0 % |
| Chromium (Cr) | 21.0 – 25.0 % | – |
| Copper (Cu) | ≤ 1.0 % | 28.0 – 34.0 % |
| Iron (Fe) | Balance | ≤ 2.5 % |
| Aluminum (Al) | 1.0 – 1.7 % | – |
| Manganese (Mn) | ≤ 1.0 % | ≤ 2.0 % |
| Silicon (Si) | ≤ 0.5 % | ≤ 0.5 % |
| Carbon (C) | ≤ 0.10 % | ≤ 0.3 % |
| Sulfur (S) | ≤ 0.015 % | ≤ 0.024 % |
| Titanium (Ti) | ≤ 0.15 % | – |
Comparison of physical properties of Inconel 601 and Monel 400
| Physical Property | Inconel 601 (Annealed) | Monel 400 (Annealed) |
|---|---|---|
| Density (g/cm³) | 8.11 | 8.80 |
| Melting Range (°C) | 1300 – 1370 | 1300 – 1350 |
| Modulus of Elasticity (GPa) | 210 | 179 |
| Thermal Conductivity (W/m·K, at 20°C) | 11.2 | 24.0 |
| Coefficient of Thermal Expansion (×10⁻⁶/K, 20–100°C) | 12.6 | 14.0 |
| Electrical Resistivity (μΩ·m, at 20°C) | 1.18 | 0.54 |
| Specific Heat (J/kg·K, at 20°C) | 444 | 427 |
Nickel Alloy 601 (Inconel 601)
Main Advantages: Excellent oxidation resistance, carburization resistance, spalling resistance, and thermal shock resistance at extremely high temperatures.
Best Uses: Heat treatment equipment, radiant tubes, catalyst carriers, furnace components, and steam superheater tubes.
Temperature Range: Excellent performance at extremely high temperatures (up to 2200°F / 1200°C).
Monel Alloy 400
Main Advantages: Excellent corrosion resistance in seawater, brackish water, hydrofluoric acid, and alkaline media; good strength at sub-zero to moderate temperatures.
Best Uses: Marine applications, crude oil distillers, chemical processing, and freshwater storage tanks.
Temperature Range: Good performance in temperatures ranging from sub-zero to approximately 1000°F (538°C).
Comparison of applications for nickel alloy 601 and Monel 400
| Field / Application | Inconel 601 | Monel 400 |
|---|---|---|
| Chemical Processing | Catalyst grids, chlorination reactors, high‑temperature acid‑handling equipment | Sulfuric acid pickling tanks, hydrofluoric acid handling, caustic soda equipment |
| Marine & Offshore | – | Seawater piping, pump shafts, valve trim, propeller shafts, marine fasteners |
| Oil & Gas (Downhole) | High‑temperature downhole instrumentation housings | Wellhead components, downhole tools, valve stems, sour‑gas handling parts |
| Power Generation | Combustor liners, heat recovery steam generator (HRSG) tubes | Feedwater heater tubes, condenser tubes, brine heater tubes |
| Aerospace & Defense | Combustion chambers, afterburner liners, rocket motor components | – |
| Heat Treatment & Furnaces | Radiant tubes, muffles, annealing trays, sintering belts | – |
| Pollution Control | Waste incinerator internals, thermal oxidizer components | Scrubber internals, flue gas desulfurization components |
| Food & Pharmaceutical | – | Food‑processing equipment, brewing tanks, pharmaceutical evaporators |
| Desalination Plants | – | Evaporator tubes, brine heaters, heat exchanger tubes |
| Pulp & Paper Industry | – | Digester components, bleaching equipment, paper‑machine wire rolls |
| Automotive & Racing | High‑performance exhaust manifolds, turbocharger housings | – |
| Nuclear Energy | Control rod guide tubes, high‑temperature reactor internals | – |
| General Fasteners & Hardware | High‑temperature bolts, studs, supports | Marine bolts, nuts, screws, fasteners in corrosive atmospheres |
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
About Gnee Steel
Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneemetal.com for a quote.
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