The main difference between Inconel 600 bars and Inconel 625 round bars lies in their composition. Because Inconel 625 round bars have a higher chromium and molybdenum content, they offer superior corrosion resistance and strength, but are also more expensive. Inconel 600 bars are more suitable for high-temperature applications where corrosion resistance requirements are not high, making them a more economical choice; while Inconel 625 alloy bars are better suited for corrosive environments and high-strength requirements, offering a more comprehensive option.
How much does Inconel 600 cost per pound?
As of December 2025, the global market price range for Inconel 600 was $24.80 to $36.40 per pound ($54.70 to $80.20 per kilogram), showing significant fluctuations compared to previous years.
Inconel 600 Round Bar
Inconel 600 round bars are high-quality nickel-chromium alloy bars with excellent appearance. They typically contain approximately 70% nickel and 14% chromium, giving them excellent oxidation and corrosion resistance, especially at high temperatures. This unique composition makes Inconel 600 round bars ideal for applications requiring high durability in harsh environments. The alloy is known for maintaining its mechanical properties over a very wide temperature range, ensuring reliable operation in both environmental and harsh conditions. Furthermore, its resistance to a variety of corrosive environments, including acids and alkalis, enhances its versatility, making it suitable for a wide range of industrial applications.
Inconel 625 Round Bar
Inconel 625 round bars are advanced alloy bars formulated with approximately 9% molybdenum, 20% chromium, and up to approximately 58% nickel. This significantly enhances their resistance to pitting and crevice corrosion, especially under harsh conditions such as seawater and acidic environments. This alloy is renowned for its versatility, maintaining high strength and durability over an extremely wide temperature range. Its superior fatigue resistance makes Inconel 625 round bars ideal for cyclic loading applications, ensuring reliable performance even under extreme conditions. This combination of excellent properties makes Inconel 625 round bars an indispensable material in industries requiring high corrosion resistance and mechanical integrity.
Composition and Properties of Inconel 600 and Inconel 625 Round Bars
| Property | Inconel 600 Round Bar (Alloy 600) | Inconel 625 Round Bar |
|---|---|---|
| Primary Base | Nickel (≥72%) | Nickel (≥58%) |
| Chromium (Cr) | 14-17% | 20-23% |
| Iron (Fe) | 6-10% | ≤5% |
| Molybdenum (Mo) | Not specified (trace) | 8-10% |
| Niobium (Nb) | Not present | 3.15-4.15% |
| Key Performance Trait | Excellent oxidation & corrosion resistance at high temperatures | High strength & broad corrosion resistance in diverse environments |
| Main Advantage | Resistance to high-temperature oxidation and chloride stress corrosion cracking | Superior strength, creep resistance, and resistance to pitting/crevice corrosion |
Physical Properties Comparison: Inconel 600 Round Bar vs Inconel 625 Round Bar
| Property | Inconel 600 Round Bar | Inconel 625 Round Bar |
|---|---|---|
| Density | 8.47 g/cm³ | 8.44 g/cm³ |
| Melting Range | 1354–1413 °C | 1290–1350 °C |
| Thermal Conductivity (20°C) | 14.8 W/m·K | 9.8 W/m·K |
| Specific Heat Capacity (20°C) | 460 J/kg·K | 410 J/kg·K |
| Coefficient of Thermal Expansion (20–100°C) | 13.3 μm/m·°C | 12.8 μm/m·°C |
| Modulus of Elasticity | 207 GPa | 205 GPa |
| Electrical Resistivity (20°C) | 1.03 μΩ·m | 1.28 μΩ·m |
| Magnetic Permeability (Annealed) | Slightly magnetic (1.01–1.10 μ) | Essentially non-magnetic |
| Thermal Diffusivity (20°C) | 3.8 mm²/s | 2.9 mm²/s |
| Poisson's Ratio | 0.29 | 0.29 |
| Specific Gravity | 8.47 | 8.44 |
| Maximum Continuous Service Temperature (Oxidizing) | ≈ 1095 °C | ≈ 980 °C |
| Thermal Expansion (20–400°C) | 14.5 μm/m·°C | 13.7 μm/m·°C |
| Specific Heat (100°C) | 480 J/kg·K | 430 J/kg·K |
| Thermal Conductivity (500°C) | 26.8 W/m·K | 17.8 W/m·K |
Comparison of corrosion resistance and oxidation resistance of Inconel 600 and Inconel 625
| Property | Inconel 600 | Inconel 625 |
|---|---|---|
| Corrosion Resistance in High-Temperature Environments | Good | Very Good |
| Corrosion Resistance in High Chloride Environments | Better than Inconel 625 | Excellent – immune to chloride stress-corrosion cracking and pitting |
| Suitability for Harsh Marine Environments | Not ideal for prolonged marine exposure | Ideal – excellent resistance to seawater and chloride-induced corrosion |
| Oxidation Resistance | Good | Superior – due to higher chromium and molybdenum content, performs better at extreme temperatures |
| Primary Corrosion/Oxidation Advantage | Good overall high-temperature corrosion resistance | Superior chloride resistance and oxidation resistance in extreme conditions |
Application Comparison: Inconel 600 Round Bar vs Inconel 625 Round Bar
| Application Field | Inconel 600 Round Bar | Inconel 625 Round Bar |
|---|---|---|
| Chemical Processing | Reactor agitator shafts, valve stems, pump shafts in caustic and nitric acid service | Mixer shafts, pump rods, fasteners in sulfuric, hydrochloric, and phosphoric acid systems |
| Aerospace | Engine mounts, exhaust system support rods, structural fasteners | Jet engine shafts, turbine blades, landing gear components, high-strength bolts |
| Marine Engineering | Propeller shafts, seawater pump shafts, marine fastener rods | Submarine shafting, offshore platform tie rods, seawater valve stems |
| Nuclear Industry | Control rod drive mechanisms, reactor internals, steam generator supports | Fuel handling tools, control rod guides, reactor core structural components |
| Oil & Gas | Wellhead studs, Christmas tree bolts, tubing hanger pins | Downhole tool mandrels, subsea connector pins, sour service fasteners |
| Heat Treatment | Furnace rollers, retort support rods, fixture pins | Continuous furnace drive shafts, brazing fixture rods, high-temperature jigs |
| Power Generation | Turbine diaphragm bolts, boiler stay rods, superheater supports | Gas turbine rotor pins, combustor liner bolts, turbine blade retention pins |
| Medical Devices | Surgical instrument shafts, implant manufacturing rods | MRI components, surgical tooling rods, biocompatible fasteners |
| Food Processing | Mixer shafts, conveyor rollers in corrosive food environments | Limited use; specialized high-corrosion mixing and cutting shafts |
| Automotive | High-performance exhaust valve guides, turbocharger shafts | Racing engine connecting rods, high-stress fasteners, turbo shafts |
| Semiconductor | Wafer handling rods, furnace support pins | Etch chamber shafts, CVD reactor components, wafer transfer arms |
| Welding Industry | Filler rod for welding nickel alloys and stainless steels | High-strength welding electrode core wire, repair rods for superalloys |
| Architectural | Decorative railing pins, corrosion-resistant fasteners in aggressive atmospheres | Structural tie rods in coastal buildings, monument fasteners |
| Mining & Mineral | Slurry pump shafts, flotation mechanism rods | Crusher shaft pins, high-wear conveyor roller shafts |
| Cryogenic Applications | LNG pump shafts, cryogenic valve stems | Liquid hydrogen transfer rods, cryogenic structural supports |
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.
