Inconel X-750 Round Bar Stock Available For Delivery

Procuring high-performance nickel alloys for mission-critical components requires more than just raw material; it demands verifiable metallurgical integrity and dimensional precision. Inconel X-750 (UNS N07750) is a precipitation-hardenable superalloy specifically engineered for applications demanding high tensile strength at temperatures up to 700°C and exceptional resistance to relaxation at moderate temperatures. Shanghai COCESS Special Alloys Co., Ltd​ maintains a strategic inventory of Inconel X-750 Round Bars, processed to meet the rigorous demands of aerospace, energy, and high-precision engineering sectors.

Metallurgical Integrity: Composition & Heat Treatment

The defining characteristic of Inconel X-750 is its age-hardening capability, driven by the precipitation of the ordered face-centered cubic gamma prime [γ′—Ni₃(Al, Ti, Nb)] phase. To ensure the alloy performs as specified, Shanghai COCESS Special Alloys Co., Ltd​ strictly controls the melt practices and thermal processing:

• Chemical Composition (wt.%):​ Ni ≥ 70.0, Cr 14.0–17.0, Fe 5.0–9.0, Ti 2.25–2.75, Al 0.40–1.00, Nb+Ta 0.70–1.20, C ≤ 0.08. This precise balance ensures optimal γ′ volume fraction for strength without compromising ductility.

• Heat Treatment State:​ Our stock is typically supplied in the Solution Treated + Stabilized + Aged​ condition (e.g., 1150°C AC + 845°C AC + 705°C AC + 620°C AC). This multi-stage process is critical to dissolve primary carbides, stabilize grain boundaries, and precipitate a fine, uniform dispersion of γ′ phase, resulting in a typical hardness of HRC 32–38​ and yield strength exceeding 965 MPa.

Dimensional Availability & Processing Standards

We offer a comprehensive range of diameters and processing options to align with your manufacturing workflows, reducing lead times and machining waste:

• Diameter Range:​ From precision centerless ground bars (Ø2mm to Ø50mm) with tight tolerances (h7/h8) for automatic screw machines, to large forged rounds (Ø50mm to Ø300mm+) for heavy-duty machining and forging pre-forms.

• Standard Compliance:​ All round bars are supplied in accordance with ASTM B637 / ASME SB-637​ and AMS 5667 / 5668 / 5669. This ensures the material meets the stringent grain size and ultrasonic testing requirements often mandated in aerospace and nuclear applications.

• Surface & Straightness:​ Options include Black (hot-rolled), Peeled (rough turned), and Centerless Ground (precision). Straightness is controlled to ≤ 1mm/m to facilitate automated feeding and high-speed machining.

Technical Advantages for Machining & Fabrication

Selecting the right stock form minimizes downstream manufacturing challenges:

• Machinability:​ While Inconel X-750 work-hardens rapidly, our stock is supplied in a heat-treated condition optimized for chip breaking and tool life. We recommend using rigid setups, positive rake angles, and high-pressure coolant to manage the alloy’s inherent toughness.

• Weldability:​ The alloy exhibits good weldability using conventional techniques (GTAW, GMAW). However, due to the precipitation-hardening nature, post-weld heat treatment (PWHT) is often required to restore the heat-affected zone (HAZ) properties to match the base metal strength, especially for pressure-retaining components.

• Formability:​ Cold heading and thread rolling are viable for smaller diameter bars (≤ Ø25mm) in the annealed condition, provided sufficient lubrication and slow feed rates are used to mitigate work hardening.

Inventory Applications & Quality Documentation

Our Inconel X-750 round bar stock is routinely utilized for:

• Aerospace Fasteners:​ High-strength bolts, studs, and nuts for turbine engines and airframes, leveraging the alloy's retention of preload at 540°C–650°C.

• Elastic Components:​ Precision springs, diaphragms, and seals for high-temperature valves and actuators.

• Tooling & Fixtures:​ Durable mandrels, forming dies, and heat-treat fixtures for the automotive and aerospace industries.

Shanghai COCESS Special Alloys Co., Ltd​ guarantees material authenticity with every shipment. Each order is accompanied by an EN 10204 3.1 Material Test Certificate, detailing heat number traceability, full chemical analysis, and room-temperature mechanical properties. We support Third-Party Inspection (TPI) and offer value-added services such as saw cutting to length, rough turning, and ultrasonic testing (UT) per ASTM A388.

Contact the technical sales team at Shanghai COCESS Special Alloys Co., Ltd​ to verify current stock levels for your required diameters and receive a competitive quotation for immediate delivery.

Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com