Inconel 718 |UNS N07718|2.4668 Seamless Tube
Distinguished by its precipitation-hardening capabilities, our Inconel 718 tubing offers exceptional yield strength and resistance to creep-rupture at temperatures up to 700°C (1300°F). This makes them indispensable for mission-critical applications in aerospace engine components, high-strength cryogenic vessels, and downhole oil & gas tools. Through advanced cold-drawing and precise vacuum heat treatment, Tengqi ensures every tube maintains optimal microstructure and superior resistance to post-weld cracking and corrosion in aggressive media.
SeamlessInconel 718 Tube (Inconel718 / UNS N07718 / W.Nr. 2.4668) is a precipitation-hardenable Ni-Cr alloy achieving very high strength up to 700 °C. Manufactured by Tengqi in Fujian, China, every heat is fully traceable, hydro-tested and available with third-party inspection (SGS / BV / TUV) on request.
Product Specifications
- ASTM B163 — Seamless Condenser & Heat Exchanger Tubes
- ASTM B167 / B407 / B423 — Seamless Tube
- ASTM B444 — Seamless Pipe & Tube
- ASTM B704 — Welded Tube
- ASTM B829 — General Requirements
- Finishing: solution annealed, age hardened; pickled & polished on request
Size Range
| Outside Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 6.35 mm – 257 mm (1/4"– 10.1") | 0.5 mm – 12.7 mm | ≤ 22 m |
Chemical Composition
Inconel718 (UNS N07718) — Composition %
| UNS | C | Mn | P | S | Si | Cr | Ni | Mo | Cu | Ti | Nb | Al | Fe | B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N07718 | ≤ 0.08 | ≤ 0.35 | ≤ 0.015 | ≤ 0.015 | ≤ 0.35 | 17.0 – 21.0 | 50.0 – 55.0 | 2.80 – 3.30 | ≤ 0.30 | 0.65 – 1.15 | 4.75 – 5.50 | 0.20 – 0.80 | balance | ≤ 0.006 |
Mechanical Properties
| Property | Value |
|---|---|
| Delivery Condition | Solution annealed + age hardened (precipitation hardened) |
| Tensile Strength | ≥ 1240 MPa |
| Yield Strength (0.2% offset) | ≥ 1035 MPa |
| Elongation in 2 in. / 50 mm | ≥ 12% |
| Hardness | ≥ 36 HRC |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.19 g/cm3 |
| Thermal Conductivity | 11.4 W/m·K |
| Specific Heat Capacity | 435 J/kg·K |
| Elastic Modulus | 200 GPa |
| Magnetic Properties | Practically non-magnetic |
Industry Applications
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Browse the complete ranges: All Inconel Alloy Tubes | Explore Inconel Alloy Pipe | Seamless Stainless Steel Tubes Catalog
CONTACT US
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