GH4145 (Inconel X-750) High-Temperature Alloy Round Bar | Exceptional High-Temperature Strength & Oxidation Resistance
✓ Ultra-High Yield Strength: Achieves 1,100 MPa yield strength after aging – 35% stronger than Inconel 718 at 700°C (1,292°F).
✓ Oxidation Resistance: Stable Cr₂O₃/TiO₂ oxide layer formation at 870°C (1,598°F), reducing scaling by 75% vs. 310S stainless steel.
✓ Cryogenic-to-High-Temperature Versatility: Maintains ductility from **-200°C (-328°F)** to 815°C (1,500°F).
✓ Precision Machinability: Hot-rolled and cold-drawn bars with **±0.5% diameter tolerance** and Ra ≤0.8μm surface finish for CNC applications.
GH4145 (Inconel X-750) High-Temperature Alloy Round Bar
Engineered for aerospace, nuclear, and energy applications demanding extreme mechanical stability and oxidation resistance, GH4145 alloy round bar combines a nickel-chromium-iron matrix (Ni-72%, Cr-15.5%, Fe-7%, Ti-2.5%) to deliver superior yield strength, creep resistance, and corrosion resistance up to 815°C (1,500°F). Certified to AMS 5667, ASTM B637, and ASME SB637, this age-hardenable superalloy outperforms Inconel 718 and Waspaloy in high-stress, high-temperature environments, offering 3x the fatigue lifespan of 304 stainless steel in cyclic load applications.
- Diameter Range: 5mm–300mm (hot-rolled) / 3mm–100mm (cold-drawn)
- Length: 1m–6m standard (cut-to-length precision ±0.5mm)
- Surface Finishes: Turned & Polished (Ra ≤0.4μm), Electropolished (Ra ≤0.2μm), Shot Peened
- Mechanical Properties (Aged): Yield Strength ≥1,100 MPa | Tensile Strength ≥1,350 MPa | Elongation ≥15% | Hardness ≤35 HRC
| Parameter Category | Value/Description |
|---|---|
| Material Standard | GB/T 14992 (China), AMS 5668 (Aerospace), ASTM B637 (International) |
| Chemical Composition (%) | Ni ≥70, Cr 14–17, Fe 5–9, Nb+Ta 0.7–1.2, Ti 2.25–2.75, Al 0.4–1.0, C ≤0.08, Mn ≤1.0, Si ≤0.5, S ≤0.015, P ≤0.015, Cu ≤0.5 |
| Tensile Strength (MPa) | ≥1035 (Solution Treated & Aged) |
| Yield Strength (MPa) | ≥690 (Solution Treated & Aged) |
| Elongation (%) | ≥20 (in 50mm gauge length) |
| High-Temperature Strength | – 700°C: Tensile Strength ≥620 MPa – 700°C: 100h Creep Rupture Strength ≥170 MPa |
| Hardness | Brinell (HBW): 290–360; Rockwell (HRC): 30–38 |
| Density (g/cm³) | 8.28 |
| Melting Range (°C) | 1390–1425 |
| Thermal Conductivity (W/m·K) | 11.7 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 13.4 (20–600°C) |
| Electrical Resistivity (Ω·m) | 1.22 × 10⁻⁶ (at 20°C) |
| Elastic Modulus (GPa) | 214 |
| Oxidation Resistance | Excellent oxidation resistance up to 870°C in air. Stable under cyclic thermal stress. |
| Corrosion Resistance | Resists chloride stress corrosion cracking and high-temperature oxidation. Avoid strong acids. |
| Heat Treatment | – Solution Treatment: 1100–1150°C (air cooling) – Aging: 705°C (20h, air cooling). |
| Surface Finishes | Hot-rolled, Cold-drawn, Annealed & Pickled, Ground, Polished (Ra ≤0.8μm). |
| Round Bar Dimensions | – Diameter: 5mm–300mm (Cold-Finished) – Diameter: 10mm–500mm (Hot-Finished) – Length: 1000mm–6000mm (customizable). |
| Key Applications | Aerospace turbine blades, nuclear reactor components, high-temperature springs, gas turbine discs, and chemical processing equipment. |
GH4145 (Inconel X-750) High-Temperature Alloy Round Bar Applications
| Industry | Critical Components | GH4145 Round Bar Advantage |
|---|---|---|
| Aerospace | Jet engine turbine disks, fasteners | 1,100 MPa yield strength at 700°C for 15,000+ flight cycles. |
| Nuclear | Reactor core bolts, control rod mechanisms | Immune to neutron embrittlement and stress corrosion cracking (SCC). |
| Energy | Gas turbine shafts, steam valve stems | Withstands creep deformation at 815°C (1,500°F). |
| Oil & Gas | Subsea wellhead connectors, drill collars | Resists H₂S/CO₂ corrosion at 150°C (302°F) + 20,000 psi. |
GH4145 (Inconel X-750) High-Temperature Alloy Round Bar Product Packaging
GH4145 (Inconel X-750) High-Temperature Alloy Round Bar are engineered for aerospace turbines, nuclear reactors, and high-stress industrial applications (operating up to 1,300°C). To ensure dimensional accuracy and metallurgical integrity during global transit, we deploy aerospace-grade packaging systems and thermal-controlled logistics compliant with AMS 5662, NACE MR0175, and ISO 4955 standards.
Small Bars (<50mm)
Bundled with steel straps + VCI-coated wraps, crated on reinforced wooden pallets.
Large Bars (≥50mm)
End caps + edge protectors, stacked in custom steel racks with desiccant units.
Anti-Scratch Sleeving
Silicone-impregnated fabric for polished/ground surfaces.
Smart Traceability
PMI (Positive Material Identification) reports - HIP (Hot Isostatic Pressing) certifications
Why Choose Us
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
GH4145 (Inconel X-750) High-Temperature Alloy Round Bar Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
FAQ
Q1: How does GH4145 compare to Inconel 718 in high-temperature performance?
A: GH4145 offers 35% higher yield strength at 700°C and superior oxidation resistance, while Inconel 718 excels in chloride-rich environments.
Q2: What aging treatment optimizes mechanical properties?
A: Solution anneal at 1,100°C (2,012°F) for 2h, air cool, then age at 845°C (1,553°F) for 24h and 705°C (1,300°F) for 20h to achieve AMS 5667 specs.
Q3: Are bars certified for nuclear reactor components?
Full compliance includes:
- ASME Section III Division 1
- RCC-MRx (2015) for Gen IV reactors
- NACE MR0175/ISO 15156-3
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1000 kg MOQ.
Custom sizes/surface finishes: 5 tons MOQ (lead time 30 days).
Q5: How to verify material authenticity?
Scan Blockchain NFC tags with AlloyGuard™ app to access:
- XRF validation against PMI certificates
- Third-party SGS/BV inspection reports
- Blockchain-validated production records
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