Nickel Alloys Alloy 718 Round Bar Overview
Zeon Exports supplies Nickel Alloy 718 (Inconel, UNS N07718) round bars, a precipitation-hardening nickel-chromium superalloy with exceptionally high strength from cryogenic temperatures up to 704°C, for aerospace, oil & gas and turbine applications.
Nickel Alloy 718 (Inconel) Round Bar is machined into turbine discs, shafts and high-strength fasteners for the most demanding aerospace, oil & gas and cryogenic applications. Its niobium-driven age hardening allows welding and forming before final precipitation treatment, giving exceptional strength and creep-rupture properties from cryogenic temperatures up to roughly 704°C without sacrificing weldability.
- Age-hardened via niobium, aluminum and titanium for very high strength
- Tensile ≥1241 MPa, yield ≥1034 MPa in the aged condition
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Nickel Alloys Alloy 718 Round Bar
Nickel Alloy 718 (Inconel) Round Bar is produced to internationally recognized bar specifications.
| Field | Detail |
|---|---|
| Material/Grade | Nickel Alloy 718 (Inconel) |
| UNS | N07718 |
| DIN/Werkstoff Number | 2.4668 |
| Standards | ASTM B637, AMS 5662/5663 |
| Form | Round Bar |
| Finish | Hot rolled, turned, ground (as specified) |
| Heat Treatment | Solution Treated + Aged (Precipitation Hardened) |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy 718
Alloy 718 (Inconel 718) is recognized under several international designations below.
| UNS | DIN/Werkstoff Number | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|
| N07718 | 2.4668 | Inconel 718 | ASTM B637 |
Chemical Composition of Alloy 718
Composition per ASTM B637 for UNS N07718; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 50.0 – 55.0 |
| Chromium (Cr) | 17.0 – 21.0 |
| Niobium + Tantalum (Nb+Ta) | 4.75 – 5.50 |
| Molybdenum (Mo) | 2.80 – 3.30 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
| Cobalt (Co), max | 1.00 |
| Manganese (Mn), max | 0.35 |
| Silicon (Si), max | 0.35 |
| Carbon (C), max | 0.08 |
| Copper (Cu), max | 0.30 |
| Iron (Fe) | Balance |
Physical Properties of Nickel Alloy 718 (Inconel)
Physical properties for Inconel 718, confirmed against manufacturer data.
| Property | Value |
|---|---|
| Density | 8.19 g/cm3 |
| Melting Range | 1260 – 1336°C |
| Magnetic Behaviour | Essentially non-magnetic (aged) |
Mechanical Properties of Nickel Alloys Alloy 718 Round Bar
Minimum mechanical properties for aged (precipitation-hardened) UNS N07718 per ASTM B637.
| Property | Minimum Value |
|---|---|
| Tensile Strength | 1241 MPa (180 ksi) |
| Yield Strength (0.2% offset) | 1034 MPa (150 ksi) |
| Elongation | 12% |
| Hardness | ~331 HB (35 HRC) typical |
| Condition | Solution Treated + Aged |
Corrosion Resistance of Nickel Alloy 718 (Inconel)
- Nickel Alloy 718 Round Bar combines corrosion resistance with the highest strength of the common nickel superalloys.
- Pitting and crevice resistance: chromium and molybdenum give strong resistance to pitting and crevice corrosion.
- Oxidation resistance: performs reliably in oxidizing atmospheres up to its service temperature ceiling.
- Sour-service resistance: API 6ACRA variants are qualified for NACE MR0175 sour oil & gas service.
Heat Resistance of Nickel Alloy 718 (Inconel)
Nickel Alloy 718 round bar retains its strength up to roughly 704°C (1,300°F) and remains ductile and tough down to cryogenic temperatures. Strength drops sharply above roughly 650°C as strengthening precipitates transform. Always confirm exact service limits against the governing standard and application before specifying.
Key Properties of Nickel Alloys Alloy 718 Round Bar
Beyond corrosion and heat performance, Inconel 718 round bar offers these additional properties.
- Highest strength of the common wrought nickel superalloys
- Excellent weldability with resistance to strain-age cracking
- Good creep-rupture strength at elevated temperatures
- Remains ductile and tough at cryogenic temperatures
Benefits of Nickel Alloys Alloy 718 Round Bar
Choosing Inconel 718 round bar from Zeon Exports delivers measurable advantages for your project.
- Exceptional strength-to-weight ratio for critical rotating components
- Full MTC 3.1 documentation for project QA/QC requirements
- Multiple sizes and finishes to match exact project specs
- Reliable bulk supply with consistent ready stock
- Competitive export pricing for large industrial orders
- Fast dispatch to global project sites and ports
Related Products
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Frequently Asked Questions About Nickel Alloys Alloy 718 Round Bar
Common questions about Nickel Alloy 718 (Inconel) Round Bar, answered below.
Q1: What is Nickel Alloy 718 (Inconel)?
Ans. Inconel 718 (UNS N07718) is a precipitation-hardening nickel-chromium superalloy strengthened by niobium, aluminum and titanium.
Q2: What standards apply to Inconel 718 round bar?
Ans. Round bar is manufactured to ASTM B637, certified to EN 10204 3.1 mill test certificates.
Q3: What is the maximum service temperature?
Ans. Inconel 718 retains its strength up to roughly 704°C (1,300°F); confirm the correct condition against your design code.
Q4: Is Inconel 718 magnetic?
Ans. Inconel 718 is essentially non-magnetic in the aged condition, being an austenitic nickel-based alloy.
Q5: How is Inconel 718 different from Inconel 625?
Ans. Inconel 718 is precipitation hardenable for much higher strength; Inconel 625 is solid-solution strengthened with broader general corrosion resistance.
Q6: Can Inconel 718 be welded?
Ans. Yes, its slow-forming niobium precipitate gives excellent weldability and resistance to strain-age cracking.
Q7: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q8: Does Zeon Exports supply custom sizes?
Ans. Yes, round bars are available cut-to-size and in custom dimensions on request for bulk industrial orders.
