Comparison of Inconel 600 and Inconel 625 pipes
Comparison of Inconel 600 and Inconel 625 pipes
Both Inconel 600 and 625 tubing are high-temperature nickel-chromium alloys, but 625 tubing, due to the addition of molybdenum and niobium, offers higher strength (tensile strength/yield strength) and corrosion resistance, making it more suitable for demanding applications, especially in harsh marine/chemical environments, but also more expensive. 600 tubing, on the other hand, is more economical, with a higher nickel content, making it more suitable for relatively milder applications such as boiling water reactors. The main difference lies in the strength and corrosion resistance of 625 tubing, while 600 tubing offers lower cost and a higher nickel content.
What are the standard pipe materials for Inconel 600?
These pipe materials conform to ASTM B167, B829, and B517 standards. Sizes vary depending on the ASTM, ASME, and API standards. Seamless Inconel 600 pipes range in diameter from 4mm to 219mm, while welded and arc-welded pipes range in diameter from 5mm to 1219.2mm, with wall thicknesses ranging from 0.5mm to 20mm.
Inconel 600 pipe is a high-performance pipe made of nickel-chromium-iron alloy (Inconel 600), specifically designed for transporting high-temperature, corrosive media. It maintains excellent strength at temperatures up to approximately 1150°C and exhibits superior resistance to oxidation, chloride stress corrosion cracking, and various acid and alkaline environments. Therefore, it is widely used in critical areas such as nuclear power plant steam generators, petrochemical cracking furnaces, heat treatment equipment, and highly corrosive chemical processes, making it a reliable alternative when stainless steel is insufficient. However, its material and manufacturing costs are significantly higher.
Inconel 625 pipe is a high-performance pipe made of nickel-chromium alloy (Inconel 625) with added molybdenum and niobium. Building upon Inconel 600 pipe, it achieves more comprehensive and superior corrosion resistance and mechanical properties through alloy strengthening. It not only possesses excellent high-temperature oxidation and chloride ion corrosion resistance, but the addition of molybdenum significantly enhances its resistance to pitting corrosion, crevice corrosion, and reducing acids (such as hydrochloric acid and sulfuric acid). Simultaneously, niobium imparts excellent high-temperature strength and creep resistance. This makes it a top-of-the-line solution for transporting media in extreme corrosive and high-temperature, high-pressure environments such as marine engineering, harsh chemicals, aerospace, and high-temperature flue gas treatment. Its overall performance is superior to Inconel 600 pipes, but it is also more expensive.
Specification of Inconel 600/625 Pipe
| Specifications | ASTM B167, B517 / ASME SB167, SB517 |
| Dimensional specification | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| Size | 1 / 8" NB - 24" NB |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Manufacturing Shapes | Hydraulic, Round, Square, Hex, Honed |
| Manufacturing Techniques | Normalized & as Rolled |
| Schedule Thickness Range | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| End Types | Plain End, Beveled End, Treaded One End, TBE (Treaded Both Ends) |
| Surface Finish | No.1, No.4, No.8 Mirror Finish, 2B |
| Value Added Services | Cutting, Beveling, Polishing, Threading, Destructive, Non Destructive, Ultrasonic Testing |
| Inspection and Test Reports | EN 10204 3.1, Mill Test Certificates, Chemical Reports, PMI Test Reports, Mechanical Reports, Third Party Inspection, NABL Approved Lab, Visual Inspection, Destructive Test and Non Destructive Test Reports |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Seamless Pipes, Finish as per customer Requirements |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Heat Treatment | Normalized, Normalized & Tempered |
| Packing of Seamless Pipes | Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests |
| Specials | Sizes and Specifications other than above can be on request |
Ready stock of available for Inconel 600/625 Pipe & Tube
ASTM B167 Inconel 600 seamless tube
Inconel 600 welded pipe
Inconel 625 IBR pipe
600 Inconel Nickel Alloy Tube
UNS N06600 Hollow Tube
DIN 2.4816 Round Tube
ASME SB167 Inconel 600 square tube
Inconel 625 rectangular tube
600 Inconel alloy cold-drawn seamless tube
Equivalent Grades of Inconel 600/625 Pipe & Tube
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | GOST | OR | BS | JIS | EN |
| Inconel 600 | N06600 | 2.4816 | NC15FE11M | МНЖМц 28-2,5-1,5 | ЭИ868 | NA 13 | NCF 600 | NiCr15Fe |
| Inconel 625 | N06625 | 2.4856 | NC22DNB4M | ХН75МБТЮ | ЭИ602 | NA 21 | NCF 625 | NiCr22Mo9Nb |
Chemical Composition of Inconel 600/625 Pipe & Tube
| Grade | Ni | Fe | C | Mn | Si | Cu | Cr | S | Mo | Co | Al | Ti | Nb |
| 600 | 72.0 min | 6.0 - 10.0 | 0.15 max | 1.0 max | 0.5 max | 0.5 max | 14.0 - 17.0 | 0.015 max | - | - | - | - | - |
| 625 | 58.0 max | 5.0 max | 0.10 max | 0.50 max | 0.50 max | - | 20.0 - 23.0 | 0.015 max | 8.0 - 10.0 | 1.0 max | 0.40 max | 0.40 max | 3.15 - 4.15 |
Mechanical Properties of Inconel 600/625 Pipe & Tube
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 600 | 8.47 g/cm3 | 1413 °C (2580 °F) | Psi – 95,000 , MPa – 655 | Psi – 45,000 , MPa – 310 | 40 % |
| 625 | 8.4 g/cm3 | 1350 °C (2460 °F) | Psi – 1,35,000 , MPa – 930 | Psi – 75,000 , MPa – 517 | 42.5 % |
Dimensions Standard Of Inconel 600/625 Pipe & Tube
| Inconel 600/625 Pipe & Tube OD mm |
Pipe WT mm |
in. | Sch | Kg/m |
| 13.72 | 1.65 | 1/4 | 10S | 0.50 |
| 13.72 | 2.24 | 1/4 | 40S | 0.64 |
| 13.72 | 3.02 | 1/4 | 80S | 0.81 |
| 17.15 | 1.65 | 3/8 | 10S | 0.64 |
| 17.15 | 2.31 | 3/8 | 40S | 0.86 |
| 17.15 | 3.20 | 3/8 | 80S | 1.12 |
| 21.34 | 2.11 | 1/2 | 10S | 1.02 |
| 21.34 | 2.77 | 1/2 | 40S | 1.29 |
| 21.34 | 3.73 | 1/2 | 80S | 1.65 |
| 26.67 | 2.11 | 3/4 | 10S | 1.30 |
| 26.67 | 2.87 | 3/4 | 40S | 1.71 |
| 26.67 | 3.91 | 3/4 | 80S | 2.23 |
| 33.40 | 2.77 | 1 | 10S | 2.13 |
| 33.40 | 3.38 | 1 | 40S | 2.54 |
| 33.40 | 4.55 | 1 | 80S | 3.29 |
| 33.40 | 6.352) | 1 | 160 | 4.30 |
| 42.16 | 2.77 | 1¼ | 10S | 2.73 |
| 42.16 | 3.56 | 1¼ | 40S | 3.44 |
| 42.16 | 4.85 | 1¼ | 80S | 4.53 |
| 42.16 | 6.352) | 1¼ | 160 | 5.69 |
| 48.26 | 2.77 | 1½ | 10S | 3.16 |
| 48.26 | 3.68 | 1½ | 40S | 4.11 |
| 48.26 | 5.08 | 1½ | 80S | 5.49 |
| 60.33 | 2.77 | 2 | 10S | 3.99 |
| 60.33 | 3.91 | 2 | 40S | 5.52 |
| 60.33 | 5.54 | 2 | 80S | 7.60 |
| 60.33 | 8.742) | 2 | 160 | 11.29 |
| 73.03 | 3.05 | 2½ | 10S | 5.35 |
| 73.03 | 5.16 | 2½ | 40S | 8.77 |
| 73.03 | 7.01 | 2½ | 80S | 11.59 |
| 88.90 | 3.05 | 3 | 10S | 6.56 |
| 88.90 | 5.49 | 3 | 40S | 11.47 |
| 88.90 | 7.62 | 3 | 80S | 15.51 |
| 88.90 | 11.132) | 3 | 160 | 21.67 |
| 101.60 | 3.05 | 3½ | 10S | 7.53 |
| 101.60 | 5.74 | 3½ | 40S | 13.78 |
| 101.60 | 8.08 | 3½ | 80S | 18.92 |
| 114.30 | 3.05 | 4 | 10S | 8.50 |
| 114.30 | 6.02 | 4 | 40S | 16.32 |
| 114.30 | 8.56 | 4 | 80S | 22.67 |
| 114.30 | 13.492) | 4 | 160 | 34.05 |
| 141.30 | 6.55 | 5 | 40S | 22.10 |
| 141.30 | 9.53 | 5 | 80S | 31.44 |
| 141.30 | 15.882) | 5 | 160 | 49.87 |
| 168.28 | 3.4 | 6 | 10S | 14.04 |
| 168.28 | 7.11 | 6 | 40S | 28.69 |
| 168.28 | 10.97 | 6 | 80S | 43.21 |
| 168.28 | 14.27 | 6 | 120 | 54.75 |
| 168.28 | 18.262) | 6 | 160 | 68.59 |
| 219.08 | 8.18 | 8 | 40S | 43.20 |
| 219.08 | 12.7 | 8 | 80S | 65.63 |
| 219.08 | 18.23 | 8 | 120 | 91.30 |
| 219.08 | 23.012) | 8 | 160 | 112.97 |
Application Of Inconel 600/625 Pipe & Tube
We ensure that all our products are made from high-quality raw materials. Each product undergoes rigorous testing before being shipped to our customers.
Petrochemical Industry
Power Generation Industry
Food Processing Industry
Oil & Gas Industry
Sugar Industry
Testing Of Inconel 600/625 Pipe & Tube
We are renowned for our precise dimensions. All products undergo comprehensive testing before shipment. We perform destructive and non-destructive testing on all our products.
Eddy current testing
Hydraulic pressure analysis
Pitting corrosion protection testing
Power generation industry
Materials certification
Packing Of Inconel 600/625 Pipe & Tube
We employ the safest and most efficient packaging methods suitable for all types of cargo transportation. Our packaging options are diverse, including:
Wooden Crates
Wooden Pallets
Shrink Film Packaging
Cartons
Wooden Crates
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.
