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Help CenterNickel Alloy Inconel 718 GH4169 UNS N07718 Steel Bars | Hot Rolled & Cold Drawn Forged Round Rods
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Nickel Alloy Inconel 718 GH4169 UNS N07718 Steel Bars | Hot Rolled & Cold Drawn Forged Round Rods
Custom Nickel Alloy Inconel 718 / GH4169 / UNS N07718 Forgings
High-Precision Forged Series: Custom Forged Rods, Rings, Squares & Shaped Components
What is Inconel 718 (GH4169 / UNS N07718)?
Product Definition:
Inconel 718 (domestic grade GH4169, international standard UNS N07718) is a precipitation-hardening nickel-chromium-iron alloy containing significant amounts of niobium and molybdenum, with a nickel content typically ranging from 50% to 55%. Through aging treatment, this high-performance material exhibits exceptionally high yield strength, tensile strength, and excellent creep-rupture properties at temperatures up to 704°C (1300°F). Combined with outstanding corrosion resistance, oxidation resistance, and superior fabricability and weldability, it is a flagship advanced material indispensable for extreme industrial applications that ordinary stainless steels cannot match.
Why Choose Inconel 718 Forgings Instead of Stainless Steel?
| Factor | Inconel 718 Nickel Alloy Forgings | High-Grade Stainless Steel (e.g., 316L / 310S) |
| Corrosion Resistance | Excellent resistance to high-concentration acids, chloride-ion stress corrosion cracking, and sulfides. | Limited performance; highly susceptible to localized pitting or stress corrosion in high-chloride or acidic environments. |
| High-Temp Mechanical Properties | Retains exceptionally high yield strength up to 650°C–700°C with outstanding long-term creep resistance. | Strength drops sharply above 550°C; limited high-temperature creep performance. |
| Oxidation Resistance | Superior oxidation resistance at temperatures exceeding 1000°C, forming a dense protective oxide scale. | Long-term thermal limit is usually around 800°C; oxide scale tends to spall off at extreme temperatures. |
| Microstructural Stability | Forged and aged structure is extremely dense and uniform, eliminating internal defects for high fatigue life. | Prolonged high-temperature operation causes grain coarsening or phase transformation, reducing fatigue strength. |
| Cost & Service Life | Higher initial manufacturing cost, but provides an exceptionally long and reliable service life under severe conditions. | Lower initial material cost, but requires frequent replacement and maintenance under high-temp, high-pressure, or corrosive environments. |
Inconel 718 (GH4169) Forgings Product Overview
| Family | Dimensions & Specifications (Customizable via Drawings) | Key Technical Features & Advantages |
| High-Precision Forged Rods |
Diameter: 80 mm – 600 mm; Length: up to 6000 mm |
Dense internal structure completely free of porosity or slag inclusions; delivers excellent axial tensile and torsional strength. |
| Seamless Forged Rings |
Outer diameter: Maximum 2500 mm Wall thickness and height: Customized according to requirements |
Utilizing advanced ring rolling or open-die forging; continuous metal grain flow along the circumference provides superior radial pressure resistance. |
| Forged Blocks / Squares | Cross-sectional dimensions: 100 mm × 100 mm to 500 mm × 500 mm | Multi-directional forging thoroughly refines the grain structure, minimizing anisotropy; ideal for high-pressure valve bodies and structural components. |
| Special Shaped Forgings | Precision forged based on client's 3D models and technical drawings | Near-net-shape forging minimizes subsequent machining allowance while maximizing the continuity of metal fiber flow lines. |
Available Product Forms & Delivery States
Product Forms: High-precision open-die forged bars, stepped shafts, rolled rings, seamless ring blanks, integral forged blocks, blind forgings, high-pressure flanges, and complex custom closed-die shape forgings.
Delivery States: Depending on your application needs, products can be supplied as-forged, solution-annealed, or solution + precipitation-aged (fully hardened). Surface finishes are available in black forged skin, rough-machined, or precision-turned bright finish.
Main Applications by Industry
| Industry | Typical Applications | Recommended Forging Form |
| Aerospace & Aviation | Aero-engine turbine discs, compressor discs, high-strength fasteners, rotor shafts, and combustion chamber components. | Precision forged turbine discs, high-precision seamless rings, die-forged shafts. |
| Oil & Gas | Deepwater and ultra-deepwell wellhead equipment, Christmas trees, downhole tools, high-pressure sour gas valve bodies, and mud pump components. | High-pressure valve blocks, custom heavy flanges, forged bars. |
| Energy & Power Generation | Gas turbine wheels, high-temperature industrial boiler fasteners, and nuclear power steam generator piping supports. | Large-diameter high-temperature bolting bars, heavy-duty forged rings. |
| Chemical Processing & Marine | Pump shafts for highly corrosive media, critical pressure-bearing components for reactors, and forged tube sheets for heat exchangers. | Precision-turned pump shafts, custom forged tube sheets. |
Quality Assurance & Ordering Notes:
Every batch is supplied with a Millennium-grade Mill Test Certificate (MTC) fully compliant with EN 10204 3.1, detailing full chemical composition analysis, mechanical properties (room and elevated temperature tensile tests, impact, hardness), grain size evaluation, and ultrasonic testing (UT) / dye-penetrant NDT data.
100% PMI Tested (Positive Material Identification) and strictly compliant with NACE MR0175 / ISO 15156 standards for resistance to sulfide stress cracking (SSC) in sour environments.
Minimum Order Quantity (MOQ) for Trial Orders: $100text{ kg}$ (or single piece forging).
Primary Specifications & Standards: Products strictly conform to ASTM B637, AMS 5662, AMS 5663, GB/T 14992, and other equivalent international standards.
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