Gnee Steel is a leading manufacturer, supplier, and exporter of high-quality Inconel 718 pipe, using premium raw materials. We offer a wide range of seamless and welded pipes in various sizes. These pipes are widely used in the oil and gas, petrochemical, pharmaceutical, food, paper, machinery, and natural gas industries. Inconel 718 seamless pipes meet ASTM B444 and UNS N07718 standards, can withstand extremely high pressures, and offer product quality assurance. Gnee Steel meets the requirements of most ASME, ASTM, and other specifications and references most international standards.
Gnee Steel can provide custom sizes and wall thicknesses of Inconel 718 alloy pipes to meet specific customer needs. Gnee Steel offers UNS N07718 pipes that meet international and national quality standards at highly competitive prices.
Detailed Explanation of ASME SB 167 / SB 829 Inconel 718 Seamless Tubes
Detailed Explanation of ASME SB 167 / SB 829 Inconel 718 Seamless Tubes
ASME SB-167 and ASME SB-829 are standards developed by the American Society of Mechanical Engineers (ASME) for the manufacture, testing, and material requirements of Inconel 718 (UNS N07718) seamless tubing. Inconel 718 is a precipitation-hardening nickel-chromium-iron superalloy known for its high strength, excellent corrosion resistance, and high-temperature performance up to 1300°F (704°C).
What are the mechanical properties of Inconel 718?
Properties of Inconel 718
Inconel 718 is a nickel-based superalloy ideal for applications requiring high strength over a temperature range from low temperatures to 1400°F (760°C). Inconel 718 also exhibits excellent tensile and impact strength.
1. Specification Overview
ASME SB-167 / ASTM B167: Standard Specification for Seamless Nickel-CrFe Alloy Tubes. This specification primarily covers alloys such as Nickel-CrFe 600, but is also commonly used for Inconel 718 alloys, especially suitable for high-temperature and corrosion-resistant applications.
ASME SB-829 / ASTM B829: Standard Specification for General Requirements for Seamless Nickel and Nickel Alloy Tubes. This specification outlines the general requirements that ASME SB-167 must meet, such as chemical composition tolerances, sampling, testing, and dimensions.
Material (Inconel 718): Also known as UNS N07718 (material number 2.4668), it is a precipitation-hardening nickel-chromium-iron-molybdenum-niobium alloy.
ASME SB 167 / SB 829 Inconel 718 Standard
| Size | ½"NB – 24"NB |
|---|---|
| Standards | ASME SB-167 ASME SB-829 ASME SB-775 ASME SB-725 |
| Schedule | SCH 10 – SCH XXS |
| Type | Seamless, Welded, Fabricated, ERW, LSAW Pipes |
| Length | Double Random, Single Random, Cut Length |
| Form | Round, Rectangular, Hydraulic, Square |
Inconel 718 Equivalent Grade
| STANDARD | WERKSTOFF NR. | UNS |
| Inconel 718 | 2.4668 | N07718 |
Inconel 718 Chemcial Composition
| Inconel 718 | Min | Mix |
| Ni | 50 | 55 |
| C | - | 0.08 |
| Mn | - | 0.35 |
| Co | - | 1 |
| Si | - | 0.35 |
| Cr | 17 | 21 |
| Fe | balance | balance |
| Al | 0.2 | 0.8 |
| Ti | 0.7 | 1.15 |
| cu | - | 0.3 |
| Mo | 2.8 | 3.3 |
| Nb | 4.75 | 5.5 |
| S | - | 0.01 |
Alloy 718 Mechanial & Physical Properties
| Element | Inconel 718 |
| Density | 8.2 g/cm3 |
| Melting Point | 1350 °C (2460 °F) |
| Tensile Strength | Psi – 1,35,000 , MPa – 930 |
| Yield Strength (0.2%Offset) | Psi – 75,000 , MPa – 482 |
| Elongation | 45 % |
Inconel 718 Seamless Tube Manufacturing Process and Surface Treatment
Process: Seamless, continuous, and homogeneous tubes are produced using extrusion, rotary punching, and cold drawing processes.
Heat Treatment: Solution annealing and aging treatments are used to achieve the required mechanical properties, typically producing "cold-worked annealed" or "hot-finished" products.
Surface Treatment: Annealing and pickling, bright annealing, or cold-drawing surface treatments are typically offered.
Suitable for paper and pulp companies
Suitable for high-pressure applications
Suitable for the oil and gas industry
Suitable for chemical refineries
Suitable for piping systems
Suitable for high-temperature applications
Suitable for water pipelines
Suitable for nuclear power plants
Suitable for the food processing and dairy industries
Suitable for boilers and heat exchangers
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.