1. Product Attributes
| Grade |
Inconel X-750 / Alloy X-750 |
| UNS |
N07750 |
| W.Nr. / EN |
2.4669 / NiCr15Fe7TiAl |
| Type |
Precipitation-Hardenable Nickel-Chromium Alloy Sheet & Plate |
| Density |
8.28 g/cm³ |
| Thickness |
0.3 mm - 12 mm (0.012" - 0.472") |
| Width |
1000 mm / 1219 mm / 1500 mm (Custom Available) |
| Length |
2000 mm / 2438 mm / 3000 mm (Custom Cut) |
| Supply Condition |
Solution Annealed (SA) / Solution Treated & Aged (STA) |
| Surface Finish |
2B / BA / No.1 / Polished / Pickled |
| Standards |
ASTM B670, AMS 5542, AMS 5598, AMS 5599, EN 10095
|
2. Material Overview
High‑Strength Inconel X‑750 Sheet for Ultra‑High‑Temperature Service
Dingsco offers high-performance Inconel Alloy X‑750 (UNS N07750, W.Nr. 2.4669) sheets and plates. This precipitation‑hardening nickel‑chromium alloy is developed to retain outstanding strength, creep resistance and oxidation stability at temperatures as high as 1300°F (704°C). Produced in compliance with ASTM B670 and AMS 5542 specifications, our X‑750 sheets feature a uniform metallurgical microstructure and dependable mechanical properties, making them ideal for use in aerospace, gas turbine, nuclear power and petrochemical industries.
3. Chemical Composition (wt%)
| Element |
Ni |
Cr |
Fe |
Nb+Ta |
Ti |
Al |
C |
Mn |
Si |
Cu |
S |
| Min |
70.0 |
14.0 |
5.0 |
0.70 |
2.25 |
0.40 |
— |
— |
— |
— |
— |
| Max |
Bal. |
17.0 |
9.0 |
1.20 |
2.75 |
1.00 |
0.08 |
1.00 |
0.50 |
0.50 |
0.01 |
4. Physical Properties
| Property |
Value |
| Density |
8.28 g/cm³ |
| Melting Point |
1395 - 1425°C |
| Thermal Conductivity @ 20°C |
11.6 W/(m·K) |
| Coefficient of Thermal Expansion (20-100°C) |
13.1 * 10⁻⁶ /°C |
| Electrical Resistivity @ 20°C |
122 μΩ·cm |
| Elastic Modulus |
214 GPa |
5. Mechanical Properties (Age-Hardened Condition)
| Property |
Value |
| Tensile Strength (UTS) |
≥ 1170 MPa (170,000 psi) |
| Yield Strength (0.2% Offset) |
≥ 860 MPa (125,000 psi) |
| Elongation (in 2") |
≥ 25% |
| Hardness |
310 - 375 HB |
6. Corrosion Resistance Comparison (CPT / CCT)
| Alloy |
UNS |
PREN |
CPT (°C) |
CCT (°C) |
| Alloy X-750 |
N07750 |
≥ 22 |
~25 |
~15 |
| Alloy 718 |
N07718 |
≥ 20 |
~20 |
~10 |
| Alloy 625 |
N06625 |
≥ 45 |
~65 |
~45 |
| Alloy C-276 |
N10276 |
≥ 63 |
≥85 |
≥70 |
Note: CPT measured per ASTM G48 Method C in 6% FeCl₃ solution. CCT measured per ASTM G48 Method D. PREN = %Cr + 3.3(%Mo) + 16(%N).
7. Key Features & Benefits
| Feature |
Benefit |
| ★ Outstanding High-Temperature Strength |
Age hardening preserves high tensile and yield strength up to 700°C (1292°F), perfect for aero‑engine and gas turbine sheet components. |
| ★ Excellent Creep & Rupture Resistance |
Maintains dimensional stability under long‑term load at high temperatures for critical sheet structures. |
| ★ Superior Oxidation Resistance |
Resists continuous oxidation up to 980°C (1800°F), suitable for combustion liners, heat shields and exhaust assemblies. |
| ★ Good Corrosion Resistance |
Tolerates a broad range of acidic and caustic environments and provides protection against chloride stress corrosion cracking. |
| ★ Precipitation Hardening Capability |
Develops high strength through γ′‑phase precipitation; heat treatment can be customised to achieve target mechanical performance. |
| ★ Excellent Formability (Solution-Annealed) |
Easy to cold work, stamp and deep draw when supplied in the solution‑annealed condition before ageing. |
8. Product Image Showcas
9. Supply Forms & Available Specifications
| Parameter |
Range / Options |
| Thickness |
0.3 mm – 12 mm (0.012" – 0.472") |
| Width |
Standard widths: 1000 mm / 1219 mm / 1500 mm; custom widths available on request |
| Length |
Standard lengths: 2000 mm / 2438 mm / 3000 mm; custom cutting service offered |
| Standards |
ASTM B670, AMS 5542, AMS 5598, AMS 5599, EN 2.4669 |
| Supply Condition |
Solution Annealed (SA) / Solution Treated and Aged (STA) |
| Surface Finish |
2B, BA, No.1, Polished, Pickled |
| Heat Treatment |
Solution: 1150°C ± 15°C, air / rapid cool
Aging cycle: 845°C × 24 h AC, followed by 705°C × 20 h AC |
| Certification |
MTR compliant with EN 10204 3.1 / 3.2; third‑party inspection on request. |
10. Typical Applications
| Industry |
Applications |
| 🔹 Aerospace & Gas Turbines |
Turbine casing parts, precision springs, high‑strength fasteners, thermal shields and lightweight structural elements |
| 🔹 Nuclear Power |
Reactor internal springs, heavy bolting assemblies and hold‑down hardware |
| 🔹 Petrochemical Processing |
High‑temperature valve bodies, pump internals and reactor internal components |
| 🔹 Industrial Furnaces |
Furnace fixtures, support trays, radiant tubes and heat treatment carrier baskets |
| 🔹 Tooling & Die |
Hot extrusion tooling and high‑temperature forming inserts for thermal processing |
11. DINGSCO Company Profile & Why Partner with Us
DINGSCO – Specialist Nickel Alloy Producer
✅ Authentic Material Assurance:
Full material traceability covering the complete route from ingot melting through finished plate. Each batch undergoes PMI verification, ultrasonic scanning and mechanical property validation prior to shipment.
✅ Rigorous Quality Governance
Holding ISO 9001:2015, PED 2014/68/EC and API 6A approvals, we maintain robust quality oversight across all phases of manufacturing.
SCIENCE AND TECHNOLOGY INNOVATION STRATEGY:
Focused on customer demands, we pursue product innovation. Leveraging our full spectrum of material grades and products, we offer streamlined one‑stop services. We strive for continuous progress by optimising materials, processes and equipment.
COOPERATION:
We value mutual assistance and teamwork. We engage constructively in team discussions to aid decision‑making, exchange practical experience, and work efficiently with diverse colleagues for worldwide projects.
12. Core Nickel Alloy Grade Comparison
| Dimension |
Inconel X-750 |
Inconel 718 |
Inconel 625 |
Inconel 600 |
| UNS |
N07750 |
N07718 |
N06625 |
N06600 |
| W.Nr. |
2.4669 |
2.4668 |
2.4856 |
2.4816 |
| Alloy System |
Ni-Cr-Fe-Al-Ti |
Ni-Cr-Fe-Nb-Mo |
Ni-Cr-Mo-Nb |
Ni-Cr-Fe |
| Strengthening |
γ′ (Al+Ti) precipitation hardening |
Primary γ″ (Ni₃Nb) precipitation |
Solid‑solution strengthening by Mo & Nb |
Solid‑solution strengthened only |
| Ni Content |
~70% |
~53% |
~61% |
~72% |
| UTS (Age-Hardened) |
≥ 1170 MPa |
≥ 1240 MPa |
~827 MPa (Annealed) |
~550-690 MPa |
| YS (Age-Hardened) |
≥ 860 MPa |
≥ 1034 MPa |
~414 MPa (Annealed) |
~205-345 MPa |
| Max Service Temp |
~700°C (load) / 980°C (oxid.) |
~650°C (load) / 1000°C (oxid.) |
~980°C |
~1095°C |
| Creep Resistance |
Excellent (up to 700°C) |
Excellent (up to 650°C) |
Good |
Fair |
| Corrosion Resistance |
Good (Oxidation + General) |
Good |
Excellent (Pitting/Crevice/Acid) |
Good (Oxidation) |
| Weldability |
Fair; post‑weld aging required to recover strength |
Good |
Excellent |
Excellent |
| Formability |
Good (Solution-Annealed) |
Good (Solution-Annealed) |
Excellent |
Excellent |
| Heat Treatment |
Complex: solution treatment + dual aging |
Complex: solution treatment + dual aging |
Simple (Annealing Only) |
Simple (Annealing Only) |
| Cost Level |
Medium-High |
High |
High |
Medium |
| Typical Applications |
Turbine casing parts, precision springs, nuclear bolting |
Engine discs, aerospace and rocket components |
Chemical piping, offshore subsea service, pickling equipment |
Heat treatment fixtures, nuclear heaters |
13.Material Selection
14. Customized Products
Dingsco provides bespoke nickel alloy sheet and plate solutions built to your specifications. Our engineering team supports you from design to delivery, offering the services below:
| Custom Service |
Capability |
| Non-Standard Thickness |
Custom gauge plate and sheet produced to your precise thickness |
| Cut-to-Size Service |
Precision shear, waterjet and laser cutting for custom part shapes |
| Special Surface Finishes |
Custom No.4 / No.8 mirror polish, brushed and pickled finishes |
| Value-Added Processing |
Forming, bending, stamping, welding and heat treatment as specified |
| Full Documentation |
EN 10204 3.1 / 3.2 MTC, PMI, UT inspection, grain size and NACE compliance records |
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