GH4145 (Inconel X-750) High-Temperature Alloy Coil | Exceptional High-Temperature Strength & Stress Relaxation Resistance
✓ Ultra-High Temperature Stability: Maintains yield strength ≥800 MPa at 700°C (1292°F) – 50% stronger than Inconel 625 at equivalent temperatures.
✓ Oxidation Resistance: Forms a protective Cr₂O₃/Al₂O₃ oxide layer at 870°C (1600°F), reducing scaling by 85% vs. 310S stainless steel.
✓ Stress Relaxation Mastery: Retains 90% of initial load after 1,000h at 600°C (1112°F), ideal for springs and fasteners.
✓ Precision Formability: Cold-rolled to **±0.1mm thickness tolerance** with Ra ≤0.8μm surface finish for deep drawing and stamping.
GH4145 (Inconel X-750) High-Temperature Alloy Coil
Engineered for aerospace, nuclear, and industrial applications requiring extreme stress resistance and thermal stability, GH4145 alloy coil combines a nickel-chromium-iron matrix (Ni-72%, Cr-15%, Fe-7%, Ti-2.5%, Al-0.7%) to deliver unmatched creep resistance, oxidation resistance, and stress relaxation properties up to 815°C (1500°F). Certified to AMS 5542, ASTM B637, and NACE MR0175, this age-hardenable superalloy outperforms Inconel 718 and Waspaloy in high-stress, high-temperature environments, offering 2x the lifespan of 316L stainless steel in cyclic thermal applications.
- Thickness: 0.5mm–12mm (cold-rolled) / 3mm–25mm (hot-rolled)
- Width: 300mm–2000mm (slitting tolerance ±0.5mm)
- Surface Finishes: Pickled, BA (Bright Annealed), Electropolished (Ra ≤0.4μm)
- Mechanical Properties (Aged): Yield Strength ≥800 MPa | Tensile Strength ≥1,200 MPa | Elongation ≥20% | Hardness ≤35 HRC
| Parameter Category | Value/Description |
|---|---|
| Material Standard | GB/T 14992 (China), ASTM B637 (International), AMS 5667 (Aerospace) |
| Chemical Composition (%) | Ni ≥70, Cr 14–17, Fe 5–9, Ti 2.25–2.75, Al 0.4–1.0, Nb+Ta 0.7–1.2, C ≤0.08, Mn ≤1.0, Si ≤0.5, S ≤0.01, 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): 260–330; Rockwell (HRC): 28–38 |
| Density (g/cm³) | 8.28 |
| Melting Range (°C) | 1390–1425 |
| Thermal Conductivity (W/m·K) | 12.1 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 13.5 (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 stress corrosion cracking (SCC), chloride pitting, and high-temperature oxidation. Avoid nitric acid (HNO₃). |
| Heat Treatment | – Solution Treatment: 1150–1200°C (air cooling) – Aging: 705°C (20h) + 620°C (20h), air cooling. |
| Surface Finishes | Cold-rolled bright annealed (BA), Pickled & Passivated, Polished (Ra ≤0.6μm). |
| Coil Dimensions | – Thickness: 0.5mm–6.0mm – Width: 50mm–1500mm – Inner Diameter (ID): 300mm–610mm – Outer Diameter (OD): ≤2500mm. |
| Key Applications | Aerospace high-temperature springs, nuclear reactor components, gas turbine seals, chemical processing coils, and precision instrumentation. |
GH4145 (Inconel X-750) High-Temperature Alloy Coil Applications
| Industry | Critical Use Cases | GH4145 Coil Advantage |
|---|---|---|
| Aerospace | Jet engine springs, turbine seals | 800 MPa yield strength at 700°C for 15,000+ flight cycles. |
| Nuclear | Reactor core fasteners, control rod clamps | Immune to neutron embrittlement and stress corrosion cracking (SCC). |
| Oil & Gas | High-pressure valve springs, downhole tools | Resists H₂S >15,000 ppm + CO₂ at 300°C (572°F). |
| Energy | Gas turbine bolts, steam turbine blades | Withstands creep deformation at 815°C (1500°F). |
GH4145 (Inconel X-750) High-Temperature Alloy Coil Product Packaging
GH4145 (Inconel X-750) High-Temperature Alloy Coil are engineered for applications in jet engines, gas turbines, and industrial furnaces (operating up to 1,200°C). To preserve their metallurgical integrity and dimensional stability during transit, we deploy aerospace-certified packaging systems and thermal-controlled logistics adhering to AMS 5599, NACE MR0175, and ISO 9328-2 standards.
Anti-rust packaging
VCI gas phase anti-rust film + desiccant (12 months moisture-proof for sea transportation)
Reinforcement method
Steel strapping + wooden pallet (load-bearing ≤ 5 tons)
Surface protection
Polyethylene film layered isolation (anti-scratch)
Customization options
IPPC fumigation wooden box (compliant with ISPM15 standard)
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 Coil 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 aerospace springs?
A: GH4145 offers 30% higher stress relaxation resistance at 600°C and superior oxidation resistance, while Inconel 718 excels in higher tensile strength below 650°C.
Q2: What aging treatment optimizes mechanical properties?
A: Solution anneal at 1150°C (2102°F) for 2h, air cool, then age at 730°C (1346°F) for 8h and 620°C (1148°F) for 8h to achieve ASTM B637 specs.
Q3: Are coils certified for nuclear reactor use?
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: 5 ton MOQ.
Custom sizes/tempers: 10 tons MOQ (lead time 30 days).
Q5: How to verify material authenticity?
Scan Smart QR codes with AlloyGuard™ app to access:
- XRF validation against PMI certificates
- Third-party SGS/TÜV inspection reports
- Blockchain-validated production records
BLOG CONTENT
Contact us by e-mail or whatsapp, 24 hours online.
- For construction companies, engineering contractors
- For buyers/wholesalers/trading companies
- For manufacturers
- Please fill out the form so we can contact you and help you.
- Enter your email (required)
- Write your inquiry or product request (required)
- Fill in your name and phone number (optional)
- Click “Submit After Filling”
- EMAIL : leoris@hanyu-cn.com
- We’ll reply within 2 hours (24/7 online via email & WhatsApp)