Comparison of Inconel 625 and Inconel 600 sheet materials
Comparison of Inconel 625 and Inconel 600 sheet materials
Inconel 625 sheets are generally superior to Inconel 600 sheets, offering higher strength, better corrosion resistance (especially in harsh environments), and a more complex composition, but they are also more expensive. Inconel 600 sheets are a more economical option for applications requiring high-temperature oxidation resistance in specific environments, but they lack the overall strength and exceptional corrosion resistance of Inconel 625 sheets.
What is the difference between Inconel 600 and Inconel 625?
Inconel 625 alloy has a higher chromium content than Inconel 600 alloy. Chromium content is the main factor determining the oxidation resistance of an alloy. Therefore, Inconel 625 has better oxidation resistance than Inconel 600.
Inconel 600 Plate
INCONEL (nickel-chromium-iron) alloy 600 (UNS N06600 / W.Nr. 2.4816) is a standard engineering material suitable for applications requiring corrosion and heat resistance. This alloy also possesses excellent mechanical properties, combining high strength with good machinability.
Inconel 625 Plate
INCONEL nickel-chromium alloy 625 (UNS N06625 / W.Nr. 2.4856) is widely used due to its high strength, excellent machinability (including joining properties), and outstanding corrosion resistance. Its operating temperature range is from low temperatures to 1800°F (982°C).
Inconel Alloy 600 Plate vs Inconel Alloy 625 Sheet Chemical Composition
| Element | Alloy 600 | Alloy 625 |
|---|---|---|
| Cr | 14.0% - 17.0% | 20.0% - 23.0% |
| Ni | ≥ 72.0% | ≥ 58.0% |
| Co | - | ≤ 1.0% |
| Mo | - | 8.0% - 10.0% |
Alloy 600 Plate vs Inconel Alloy 625 Sheet Corrosion Resistance
Nickel alloys possess excellent corrosion resistance due to the presence of nickel. Alloys such as 600 alloy plates and 625 plates fully demonstrate this characteristic.
Compared to 600 alloy plates, 625 alloy plates contain a higher proportion of chromium. Chromium content is crucial for the oxidation resistance of an alloy. Therefore, 625 alloy plates exhibit superior oxidation resistance compared to 600 alloy plates.
600 alloy plates contain no molybdenum, while 625 alloy plates contain over 8% molybdenum, giving them a reduction resistance not found in 600 alloys.
Thus, 625 alloy plates demonstrate superior overall corrosion resistance.
Inconel Alloy 600 Plate vs Inconel Alloy 625 Plate Mechanical Properties
| Property | Alloy 600 Plate | Alloy 625 Plate |
|---|---|---|
| Density | 8.47 g/cm³ | 8.4 g/cm³ |
| Melting Point | 1413 °C (2580 °F) | 1350 °C (2460 °F) |
| Tensile Strength | 95,000 psi / 655 MPa | 135,000 psi / 930 MPa |
| Yield Strength (0.2% Offset) | 45,000 psi / 310 MPa | 75,000 psi / 517 MPa |
| Elongation | 40% | 42.5% |
Inconel 600 vs 625 Plate - Application Comparison
| Application | Inconel 600 Plate | Inconel 625 Plate | Main Reason |
|---|---|---|---|
| Chemical Processing | Caustic evaporators, ammonia systems | Acid reactors, chloride-containing equipment | 625 resists acids & chlorides better |
| Aerospace | Engine cowlings, exhaust ducts | Jet engine parts, heat shields | 625 stronger at high temperatures |
| Marine | Heat exchangers, condenser plates | Seawater piping, offshore structures | 625 resists seawater corrosion better |
| Nuclear | Steam generator tubing, reactor parts | Fuel spacers, control rod parts | 600 for high-temp water; 625 for corrosion |
| Heat Treatment | Furnace muffles, radiant tubes | Brazing fixtures, carburizing trays | 600 for oxidation; 625 for salt/carburizing |
| Oil & Gas | Wellhead components (sweet service) | Downhole equipment (sour service) | 625 resists H₂S & chlorides |
| Pollution Control | Mild flue gas systems | FGD scrubbers, stack liners | 625 handles acidic condensates better |
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!
