Detailed comparison of nickel 600 alloy and nickel 625 alloy
Detailed comparison of nickel 600 alloy and nickel 625 alloy
Nickel 600 and Nickel 625 are both high-strength, corrosion-resistant nickel alloys, but their compositions differ significantly, affecting their performance and applications. Nickel 625 has a higher chromium and molybdenum content, giving it superior corrosion resistance and strength, especially in harsh environments and marine settings. Nickel 600, with its higher nickel content, is known for its oxidation resistance at high temperatures, making it suitable for heat treatment and chemical plants.
What is Nickel Alloy 600?
Nickel Alloy 600, also marketed under the brand name Inconel 600, is a unique nickel-chromium alloy renowned for its oxidation resistance at high temperatures. It has a wide range of applications, from low-temperature applications to high-temperature applications up to 2000°F (1093°C).
Nickel 625 and Nickel 600 are both nickel-chromium alloys, renowned for their excellent corrosion resistance and high-temperature performance. However, they possess different properties and applications, making them suitable for different environments. The following provides a detailed comparison of these two alloys, focusing on their chemical composition, mechanical properties, high-temperature performance, corrosion resistance, weldability, and applications.
Inconel 625 vs. Inconel 600: A Comprehensive Comparison
nickel 600 alloy and nickel 625 alloy Chemical Composition comparison
| Element | Inconel 625 | Inconel 600 |
|---|---|---|
| Nickel (Ni) | 58-63% | 72-76% |
| Chromium (Cr) | 20-23% | 14-17% |
| Iron (Fe) | Balance | Balance |
| Molybdenum (Mo) | 8-10% | None |
| Niobium (Nb) | 3.0-4.0% | None |
| Carbon (C) | ≤0.10% | ≤0.15% |
nickel 600 alloy and nickel 625 alloy Mechanical Properties comparison
| Property | Inconel 625 | Inconel 600 |
|---|---|---|
| Yield Strength (MPa) | 280 – 345 | 200 – 310 |
| Ultimate Tensile Strength (MPa) | 700 – 1,200 | 450 – 700 |
| Elongation (%) | 30% (min) | 30% (min) |
| Hardness (Rockwell B) | 40-50 | 80-100 |
nickel 600 alloy and nickel 625 alloy High-Temperature Performance comparison
| Feature | Inconel 625 | Inconel 600 |
|---|---|---|
| Service Temperature | Up to 1,800°F (982°C) | Up to 1,900°F (1,038°C) |
| Oxidation Resistance | Excellent | Good |
| Creep Resistance | Very good | Moderate |
nickel 600 alloy and nickel 625 alloy Corrosion Resistance comparison
| Corrosion Type | Inconel 625 | Inconel 600 |
|---|---|---|
| General Corrosion | Excellent | Very good |
| Pitting Corrosion | Excellent | Good |
| Stress Corrosion Cracking | Excellent | Moderate |
| Acid Resistance | Good in moderate acidic environments | Very good in non-oxidizing acids |
nickel 600 alloy and nickel 625 alloy Weldability Comparison comparison
| Feature | Inconel 625 | Inconel 600 |
|---|---|---|
| General Weldability | Good; often requires preheat | Good; usually does not require preheating |
| Post-Weld Heat Treatment | Generally not required | Generally not required |
| Filler Material | ERNiCrMo-3 | ERNi 600 |
Application Comparison: Nickel 600 vs Nickel 625
| Application Area | Nickel 600 (UNS N06600) | Nickel 625 (UNS N06625) |
|---|---|---|
| Chemical Processing | Caustic evaporators, nitric acid equipment, organic acid reactors | Sulfuric acid plants, phosphoric acid systems, chloride-containing process equipment |
| Aerospace | Engine mounts, exhaust system components, fasteners | Jet engine exhaust ducts, thrust reversers, combustion chamber liners |
| Marine Engineering | Seawater heat exchangers, condenser tubing, marine exhaust systems | Offshore platform components, submarine fittings, seawater piping, propeller shafts |
| Nuclear Industry | Steam generator tubing, reactor vessel internals, control rod drive mechanisms | Fuel element spacers, control rod components, reactor core support structures |
| Heat Treatment Equipment | Retorts, radiant tubes, furnace muffles, annealing covers | Continuous belt furnaces, carburizing trays, brazing fixtures |
| Oil & Gas | Wellhead components, tubing hangers (sweet service) | Downhole equipment, subsea connectors, valve components (sour service) |
| Pollution Control | Flue gas ducting, mild scrubber systems | FGD scrubbers, stack liners, waste incineration systems |
| Power Generation | Boiler components, steam turbine diaphragms | Gas turbine combustors, transition pieces, burner nozzles |
| Pharmaceutical | Fermentation tanks, distillation columns | Reaction vessels with mixed acid environments, sterilization systems |
| Food Processing | Evaporator plates, heat exchangers for edible oils | Limited use due to cost; specialized high-corrosion areas |
| Fasteners & Bolting | Studs, bolts, nuts for high-temperature service | High-strength bolts for extreme environments, offshore applications |
| Welding Consumables | Filler metal for welding nickel alloys and stainless steels | Filler metal for high-strength corrosion-resistant welds |
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!
