Gnee Steel is a major manufacturer, exporter, and supplier of Inconel 718/825 pipes. We use the highest quality raw materials available on the market. With extensive experience and expertise in this field, we are able to offer our customers a complete range of products at highly competitive prices.
Inconel 718 tubing compared to 825 alloy tubing
Inconel 718 tubing compared to 825 alloy tubing
Inconel 718 tubing offers exceptional high-temperature strength (up to 700°C), excellent creep rupture resistance, and high-strength precipitation hardening properties, making it suitable for aerospace and critical oil/gas applications. In contrast, Incoloy 825 tubing excels in corrosion resistance, particularly against sulfuric acid and phosphoric acid, making it more suitable for chemical processing applications.
What is the difference between Inconel 718 and 825?
The main difference between Inconel 718 and 825 lies in their chemical composition. Although both are nickel-chromium alloys, they differ in the proportions of other elements such as iron, niobium, molybdenum, titanium, aluminum, copper, and carbon. (January 3, 2023)
Inconel 718 seamless and welded pipes possess exceptional resistance to oxidation, corrosion, and stress cracking. These seamless and welded Inconel 718 pipes have a tensile strength of 130,000 psi and a yield strength of 75,000 psi. Inconel 718 pipes exhibit outstanding performance and an extremely high melting point.
Inconel 825 possesses similarly excellent properties. Inconel 825 effectively resists the effects of chemical processes such as corrosion, moisture, and oxidation. Inconel 825 can operate normally at temperatures up to 1020 degrees Celsius. It has a tensile strength of 80,000 psi and a yield strength of 32,000 psi. It exhibits excellent resistance to crevice corrosion, chemical corrosion, and stress cracking caused by climate change. These pipes are widely used in oil and gas extraction, chemical processing, and radioactive waste treatment.
Specification For incoloy 825 Alloy / Nickel 718 Pipes
| Specification | ASTM B423, ASTM B514 / ASME SB423, ASME SB514 , ASTM B705, ASTM B407 / ASME B705, ASME SB407 |
|---|---|
| Pipes & Tubes Size | 1 / 8″ NB – 24″ NB |
| EFW Pipe Size | 6″ NB – 48″ 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 Techniques | Seamless / Welded / ERW / Fabricated / CDW / 100% X Ray Welded |
| 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) |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Value Added Services | Cutting, Beveling, Polishing, Threading, Destructive, Non Destructive, Ultrasonic Testing |
Equivalent Grades Of Inconel 718 / alloy 825 Pipes
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN | OR |
| Inconel 718 | 2.4668 | N07718 | - | - | - | - | - | - |
| Incoloy 825 | 2.4858 | N08825 | NCF 825 | NA 16 | ЭП703 | NFE30C20DUM | NiCr21Mo | XH38BT |
Manufacturers of various types of Inconel 718/825 pipes
Inconel 718/825 Seamless Pipe
Inconel 718/825 Alloy Welded Pipe
Inconel 825 Alloy ERW Welded Pipe
Inconel 718/825 Seamless Pipe
Inconel 718/825 Welded Pipe
Inconel 718/825 ERW Welded Pipe
Inconel 718 / 825 Pipes Chemical Composition
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr | Al | Ti |
| Inconel 718 | 0.08 max | 0.35 max | 0.35 max | 0.015 max | 0.30 | - | 50 - 55 | 17 - 21 | 0.20-0.80 | 0.65-1.15 |
| Incoloy 825 | 0.05 max | 1.00 max | 0.5 max | 0.03 max | 1.50 – 3.00 | 22.00 min | 38.00 – 46.00 | 19.50 – 23.50 | 0.02 max | 0.06 – 1.20 |
Inconel 718 / 825 Alloy Tubes Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 718/825 | 8.14 g/cm3 | 1400 °C (2550 °F) | Psi – 80,000 , MPa – 550 | Psi – 32,000 , MPa – 220 |
Inconel 718 / 825 Tubing Size
| Wall Thickness | Monel Tube Sizes ( O.D.) |
|---|---|
| .010 | 1/16″ , 1/8″ , 3/16″ |
| .020 | 1/16″ , 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ |
| .012 | 1/8″ |
| .016 | 1/8″ , 3/16″ |
| .028 | 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 3/4″ , 1″ , 1 1/2″ , 2″ |
| .035 | 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 7/16″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″ |
| .049 | 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/8″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″ |
| .065 | 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 3/4″ , 2″ , 2 1/2″ , 3″ |
| .083 | 1/4″ , 3/8″ , 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 7/8″ , 2″ , 2 1/2″ ,3″ |
| .095 | 1/2″ , 5/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ |
| .109 | 1/2″ , 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ |
| .120 | 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 2 1/4″ , 2 1/2″ , 3″ |
| .125 | 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 3″ , 3 1/4″ |
| .134 | 1″ |
| .250 | 3″ |
| .375 | 3 1/2″ |
Inconel 718 / 825 Tubes Pressure Rating
| Tube O.D. (in.) |
Wall Thickness of Tube (inches) | |||||||
| .028 | .035 | .049 | .065 | .083 | .095 | .109 | .120 | |
| Working Pressure (psig) | ||||||||
| 1/8 | 7900 | 10100 | ||||||
| 1/4 | 3700 | 4800 | 7000 | 9500 | ||||
| 5/16 | 3700 | 5400 | 7300 | |||||
| 3/8 | 3100 | 4400 | 6100 | |||||
| 1/2 | 2300 | 3200 | 4400 | |||||
| 3/4 | 2200 | 3000 | 4000 | 4600 | ||||
| 1 | 2200 | 2900 | 3400 | 3900 | 4300 | |||
Incoloy 825 alloy exhibits excellent corrosion resistance under various conditions, making it widely applicable.
Inconel 718 is a precipitation-hardening alloy renowned for its extremely high strength.
Each alloy has its specific application and is not interchangeable with the others.
Gnee Steel offers Incoloy 825 and Inconel 718 products using standard solution treatment or aging treatment processes. Please feel free to contact us for material procurement needs.
Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ru@gneesteelgroup.com for a quote.