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Inconel X-750 (UNS N07750 / W.Nr. 2.4669) is a precipitation-hardenable nickel-chromium-iron superalloy distinguished by its exceptional stress relaxation resistance up to 650°C and high tensile strength retention up to 815°C. It is the premier choice for critical components in aerospace, energy, and industrial processing where long-term dimensional stability under heat is mandatory. Shanghai COCESS Special Alloys Co., Ltd is a reliable supplier offering a comprehensive portfolio including Bar, Plate, Forgings, and Custom Springs, backed by rigorous metallurgical certification and technical support.
Metallurgical Integrity: Composition & Gamma Prime Control
The performance of Inconel X-750 is dictated by the precise precipitation of the gamma prime [γ′—Ni₃(Al, Ti, Nb)] phase. Shanghai COCESS Special Alloys Co., Ltd enforces strict compositional control to ensure optimal performance:
Chemical Composition (wt.%): Ni ≥ 70.0 (Balance), Cr 14.0 – 17.0 (Oxidation resistance), Fe 5.0 – 9.0, Ti 2.25 – 2.75 (Primary strengthener), Al 0.40 – 1.00 (Co-strengthener), Nb+Ta 0.70 – 1.20 (Grain boundary stabilizer & creep resistor), C ≤ 0.08, S ≤ 0.010.
Mechanical Properties (Fully Aged Condition):
Tensile Strength (Rm): ≥ 1138 MPa (Typical 1200 – 1400 MPa).
Yield Strength (Rp0.2): ≥ 965 MPa (Typical 800 – 1050 MPa).
Hardness: HRC 32 – 38.
Key Physical Data: Density 8.28 g/cm³; Modulus of Elasticity 214 GPa (Room Temp); Thermal Expansion 13.1 × 10⁻⁶/°C (20–100°C).
Comprehensive Supply: Bar, Plate & Forgings
We maintain a robust inventory and production capability for various product forms, complying with major international standards:
Round Bars (ASTM B637 / ASME SB-637, AMS 5667/5668): Diameters from 6mm to 300mm+. Available in Solution Treated (for machining/cold heading) or Fully Aged (for direct installation). Precision ground finishes are available for high-tolerance applications.
Plate & Sheet (AMS 5542, AMS 5598): Thickness range from 0.5mm to 50mm+. Supplied in sheet (1000mm x 2000mm) and plate (1500mm x 6000mm) formats, ideal for forming high-temperature shrouds, seals, and structural components.
Open Die & Ring Forgings: Custom-produced blocks, shafts, and seamless rolled rings (up to 1200mm OD) per ASTM B564 conceptual standards. We control grain size (ASTM 5–8) and perform UT inspection per ASTM A388 to ensure internal soundness for pressure-retaining parts.
Specialized Capability: Custom Spring Manufacturing
Beyond raw material supply, Shanghai COCESS Special Alloys Co., Ltd possesses specialized expertise in manufacturing Inconel X-750 Springs, leveraging the alloy's unique properties:
Spring Types: We produce Helical Compression/Extension Springs, Belleville Washers (Disc Springs), and Wave Springs.
Material & Process: Springs are fabricated from our certified X-750 wire/bar stock. The manufacturing process involves precision coiling/wire forming followed by a stringent heat treatment protocol: Solution Treating (1093–1150°C) + Stabilization (843–871°C) + Double Aging (704–732°C + 618–649°C). This ensures the final product achieves the required HRC 32–38 hardness and maximum relaxation resistance.
Performance Validation: All custom springs are tested for load-deflection characteristics and can be supplied with individual test reports.
Quality Assurance & Global Service
Reliability is guaranteed through documentation and support:
Traceability: Every shipment includes an EN 10204 3.1 Mill Test Certificate (MTC) detailing heat number, chemical analysis, and mechanical properties.
Inspection Readiness: We fully support Third-Party Inspection (TPI) by agencies such as SGS, TUV, and BV.
Value-Added Services: To streamline your production, we offer precision saw cutting, rough turning, waterjet cutting, and technical consultation on machining/heat treatment parameters.
For a dependable supply of Inconel X-750 raw materials or custom-engineered springs, contact the technical team at Shanghai COCESS Special Alloys Co., Ltd. We provide the data-backed assurance and manufacturing flexibility your project demands.
Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com
