Difference between Inconel 625 and 600 Welded Pipe
Difference between Inconel 625 and 600 Welded Pipe
The main difference between Inconel 625 and 600 welded pipes lies in their composition. 625 contains molybdenum, offering superior corrosion resistance and strength, while 600 is a simpler nickel-chromium alloy. The main difference is that 625 has higher tensile and yield strength, and stronger corrosion resistance (e.g., resistance to salt water corrosion), but its more complex composition also results in a higher cost; 600 is more economical and suitable for high-temperature applications without high chloride stress.
Can Inconel 600 alloy be welded?
Inconel 600 alloy can be welded using various methods, such as tungsten inert gas welding (GTAW) or argon arc welding (TIG). Other methods include gas metal arc welding (GMAW), gas metal arc welding (MIG), and plasma arc welding (PAW).
Chemical composition of Inconel 625 and 600 welded pipes
| 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% |
Mechanical Properties
| 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 |
Inconel 600 Welded Pipe and its Characteristics:
Inconel 600 welded pipe exhibits excellent chemical and mechanical properties even under high-temperature conditions. It is highly resistant to organic and inorganic compounds and various corrosive media. Inconel 600 welded pipe is resistant to steam, alkalis, and carbon dioxide corrosion. This pipe has excellent weldability and processability. Furthermore, it exhibits strong resistance to organic acids such as formic acid, caustic alkalis, and acetic acid. Inconel 600 welded pipe has high durability and high strength under both reducing and oxidizing conditions.
Inconel 625 Welded Pipe and its Characteristics:
Inconel 625 welded pipe possesses excellent strength and weldability. This pipe is manufactured using the ERW process from roll-formed steel strip. It operates efficiently even under high-temperature conditions. Inconel 625 welded pipe has higher tensile strength, heat resistance, good cold and hot workability, and higher durability. This pipe exhibits higher toughness even under high pressure and high temperature conditions. These welded pipes exhibit exceptional corrosion resistance, oxidation resistance, and carburization resistance. These nickel-based pipe fittings offer superior resistance to pitting corrosion, water corrosion, and chloride ion corrosion cracking. Furthermore, Inconel 625 welded pipes are resistant to caustic solutions, sulfuric acid, and other acidic media.
Applications of Inconel 600 Welded Pipe:
This type of welded pipe is mainly used in chemical, food processing, and condenser industries. Due to its excellent corrosion resistance, Inconel 600 welded pipe is also used in the production of caustic alkalis, boiling water reactors, reactor pressure vessels, and heat exchangers.
Applications of Inconel 625 Welded Pipe:
Due to its excellent corrosion resistance, Inconel 625 welded pipe is suitable for high-salinity seawater and freshwater environments. This type of welded pipe is suitable for various industrial applications, such as furnace components, heat treatment, chemical equipment, and seawater treatment equipment.
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 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.
