Inconel X-750
Certification: ISO9001:2015
Alloy category: corrosion-resistant alloy
Substrate shape: axial wire/strip/straight bar
Alloy series: nickel-chromium alloy
Implementation standard: ASTM B637
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
- Send E-mail: ss@gneesteel.com
Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of inconel x-750 in China. If you're going to wholesale high quality inconel x-750 made in China, welcome to get free sample from our factory. Good service and reasonable price are available.
Inconel X-750 introduce
Gnee Alloy Inconel X-750 introduce
Inconel X-750 is a precipitation-hardening nickel-chromium superalloy renowned for its excellent high-temperature strength, outstanding oxidation resistance, and superior stress relaxation properties up to 700°C (1290°F). It is widely used in critical applications such as gas turbine springs, rocket engines, and nuclear reactor components.
Inconel X-750 equivalent grade
| Specification | Equivalent |
|---|---|
| UNS | N07750 |
| AMS | 5598, 5667, 5698, 5699 |
| ASTM | B637 |
| DIN | W.Nr. 2.4669 |
Inconel X-750 Available Shape
Inconel X-750 Seamless Pipe
Inconel X-750 Plate
Inconel X-750 Pipe Fitting
Inconel X-750 Bar
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| Rod | ASTM B 637, ASME SB 637, ISO 9723, ISO9724, ISO9725, AMS 5667, AMS 5668, AMS 5669, AMS 5670, AMS 5671, AMS 5747, EN10269 |
| Bar | ASTM B 637, ASME SB 637, ISO 9723, ISO9724, ISO9725, AMS 5667, AMS 5668, AMS 5669, AMS 5670, AMS 5671, AMS 5747, EN10269 |
| Forging Stock | ASTM B 637, ASME SB 637, ISO 9723, ISO9724, ISO9725, AMS 5667, AMS 5668, AMS 5669, AMS 5670, AMS 5671, AMS 5747, EN10269 |
| Plate | ISO 6208, AMS 5542 and AMS 5598 |
| Sheet | ISO 6208, AMS 5542 and AMS 5598 |
| Other | UNS N07750, W.Nr 2.4669, Inconel X750 (tradename), UNS N07752 |
Inconel X-750 Specification
| Inconel X750 Chemical Composition： |
| Grade | C | Mn | Si | S | Cu | Al | Ti | Co | Nb+Ta | Fe | Cr | Ni |
| Inconel X750 | 0.08 max | 1.0 max | 0.5 max | 0.01 max | 0.5 max | 0.4 – 1.0 | 2.25-2.75 | 1.0 max | 0.7 – 1.2 | 5.0 – 9.0 | 14.00 – 17.00 | 70.0 min |
Inconel X-750 Mechanical Properties (by Product Type)：
| Product Form | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| Bar (≤ 25 mm) | ≥ 1200 | ≥ 850 | ≥ 15 |
| Bar (25 – 50 mm) | ≥ 1170 | ≥ 820 | ≥ 12 |
| Bar (50 – 100 mm) | ≥ 1100 | ≥ 750 | ≥ 10 |
| Plate (≤ 10 mm) | ≥ 1100 | ≥ 700 | ≥ 15 |
Physical characteristics of Inconel X-750：
| Property | Value | Unit | Significance |
|---|---|---|---|
| Density | 8.28 | g/cm³ | Weight calculation |
| Melting Range | 1390 – 1430 | °C | Fire resistance margin |
| Thermal Conductivity (20°C) | 11.5 – 12.5 | W/m·K | Heat dissipation |
| Thermal Conductivity (500°C) | ~18.0 | W/m·K | High-temperature performance |
| CTE (20-100°C) | 13.0 × 10⁻⁶ | /°C | Fitting compatibility |
| CTE (20-600°C) | ~14.5 × 10⁻⁶ | /°C | High-temperature design |
| Specific Heat (20°C) | 440 | J/kg·K | Thermal capacity |
| Specific Heat (600°C) | ~520 | J/kg·K | High-temperature thermal capacity |
| Modulus of Elasticity (20°C) | ~214 | GPa | Stiffness |
| Modulus of Elasticity (600°C) | ~175 | GPa | Hot stiffness |
| Electrical Resistivity | 1.22 | µΩ·m | - |
| Magnetic Properties | Non-magnetic | - | - |
Inconel X-750 high temperature and corrosion resistance
High-Temperature Mechanical Properties (Aged Condition)
| Temp (°C) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Strength Retention (%) |
|---|---|---|---|---|
| 20 (RT) | ≥ 1100 – 1200 | ≥ 700 – 900 | 15-25 | 100% |
| 300 | ~1050 | ~750 | ~18 | 92% |
| 400 | ~1000 | ~720 | ~20 | 88% |
| 500 | ~950 | ~680 | ~22 | 83% |
| 550 | ~900 | ~640 | ~24 | 79% |
| 600 | ~850 | ~600 | ~26 | 74% |
| 650 | ~780 | ~550 | ~28 | 68% |
| 700 | ~700 | ~500 | ~30 | 61% |
| 750 | ~600 | ~430 | ~32 | 52% |
| 800 | ~500 | ~360 | ~35 | 44% |
Corrosion Resistance
| Environment | Resistance Level | Notes |
|---|---|---|
| Oxidizing Acids (HNO₃) | Good | - |
| Reducing Acids (H₂SO₄, HCl) | Poor | Not recommended |
| Chloride Pitting | Moderate | - |
| Chloride Stress Corrosion Cracking | Moderate | - |
| Seawater | Limited | - |
| High-Temperature Oxidation (to 980°C) | Excellent | - |
| High-Temperature Sulfidation | Good | - |
Corrosion Resistance Rating (1-5, 5 = best)
| Environment | Inconel X-750 |
|---|---|
| Nitric Acid | 4 |
| Sulfuric Acid | 2 |
| Hydrochloric Acid | 1 |
| Seawater | 2 |
| High-Temp Oxidation (980°C) | 5 |
Inconel X-750 Heat Treatment Schedule
| Step | Treatment | Temperature | Time | Cooling | Purpose |
|---|---|---|---|---|---|
| 1. Solution Treatment | Full solution | 980 – 1020°C | 1-2 hours | Rapid cool (water or air) | Dissolve γ′ |
| 2. First Aging | Age hardening | 845°C (1550°F) | 2-4 hours | Air cool | Coarsen γ′ |
| 3. Second Aging | Age hardening | 700°C (1290°F) | 16-20 hours | Air cool | Fine γ′ precipitation |
Alternative Heat Treatment (Springs)
| Step | Treatment | Temperature | Time | Cooling |
|---|---|---|---|---|
| 1. Solution Treatment | Full solution | 980 – 1020°C | 1-2 hours | Rapid cool |
| 2. Aging | Age hardening | 730°C | 16 hours | Air cool |
Applications of inconel X-750
| Industry | Application | Operating Temperature | Key Requirements |
|---|---|---|---|
| Aerospace | Turbine blades, seals, fasteners, springs | 500 – 750°C | High-temp strength, creep resistance |
| Gas Turbines | High-temperature springs, bolts, seals | 500 – 700°C | Relaxation resistance |
| Nuclear | Reactor core springs, fasteners | 300 – 600°C | Creep resistance, non-magnetic |
| Automotive | High-performance exhaust springs | 500 – 650°C | Relaxation resistance |
| Chemical Processing | High-temperature fasteners | 400 – 600°C | Strength, oxidation resistance |
| Power Generation | Turbine fasteners, springs | 500 – 700°C | Creep resistance |
Comparison of Inconel X-750 with other alloys
| Property | Inconel X-750 | Inconel 718 | Inconel 625 |
|---|---|---|---|
| Strengthening Mechanism | γ′ (Ti+Al) | γ″ + γ′ (Nb) | Solid-solution |
| Tensile Strength (RT) | 1100-1200 MPa | 1275 MPa | 830 MPa |
| Yield Strength (RT) | 700-900 MPa | 1035 MPa | 415 MPa |
| Elongation | 15-25% | 12% | 30% |
| Max Service Temp | 700-750°C | 650-700°C | 600°C |
| Spring Application | Excellent | Good | Fair |
| Relaxation Resistance | Excellent | Good | Poor |
| Cost | High | High | Moderate |
Inconel X-750 Packaging
GNEE Group Inconel X-750 Product Packaging
Inconel X-750 Non-Destructive Testing (NDT)
GNEE Group Inconel X-750 Testing
| Test Method | Requirement | Standard | Acceptance Criteria |
|---|---|---|---|
| Ultrasonic Testing (UT) | As specified (bars ≥ 12mm) | ASTM E2375 | No defects exceeding 0.8mm |
| Eddy Current Testing (ET) | As specified (wire/spring) | ASTM E426 | No relevant indications |
| Liquid Penetrant Inspection (LPI) | As specified | ASTM E1417 | No relevant indications |
| Visual Inspection | 100% | - | No surface defects |
Global Export Solutions for Inconel X-750
| Target Market | Key Requirements / Characteristics |
|---|---|
| European & American Aviation / Energy Markets | Mandatory compliance with AMS series aviation standards; must provide aging heat treatment process reports, fatigue performance test data, and UT NDT reports; TUV 3.2 third‑party certification is a bidding requirement |
| Middle East Gas Turbine Projects | Focuses on high‑temperature stress relaxation resistance and durability fatigue data; accepts UNS N07750 designation; mandatory EN10204 3.1 material certificate |
| Southeast Asian High‑End Industrial Markets | Primarily ex‑stock precision wire and bar products; adapted to high‑end equipment supporting orders; short delivery lead times with high performance‑to‑price ratio stability |
About Gnee Alloy
Provide the following key parameters to receive an accurate quote and a comprehensive technical compliance package, suitable for overseas project bidding and procurement planning:
1. Product Category: Wire, rod, plate, forgings, or precision-machined parts; include specific dimensional tolerances and surface finish requirements.
2. Operating Conditions: Working temperature, dynamic/static loads, and service environment (e.g., air, flue gas, or mildly corrosive media).
3. Processing Requirements: Precision grinding, cutting, forming, or customized aging parameters.
4. Certification Requirements: Standard 3.1 certificates, third-party aerospace-grade certification, or specific testing reports.
Premium Export Services: Free guidance on material selection based on operating conditions, complimentary sample testing, full process traceability, dedicated one-on-one technical support for overseas projects, and one-stop assistance with customs clearance documentation.
Contact us to create a tailored solution for your project
Gnee Alloy inconel X-750 certificate
FAQ
Q1: What are the key differences in material selection between X-750 and Inconel 718?
A: Inconel 718 excels in high-strength, high-pressure static applications, making it ideal for fixed structural components. X-750's unique advantages lie in its resistance to high-temperature relaxation, durability under dynamic fatigue, and elastic stability; it is the premier choice for high-temperature springs, dynamic seals, and components subject to repeated fastening. The two materials are not interchangeable.
Q2: Do finished X-750 products require secondary aging treatment by the customer?
A: All exported finished products undergo standardized double-aging heat treatment, fully meeting mechanical and elastic performance standards. Customers can proceed directly to machining and assembly without further heat treatment, significantly reducing overseas construction costs.
Q3: What is the maximum operating temperature for X-750 in dynamic applications?
A: It supports long-term, stable dynamic service at temperatures up to 650°C. Within this range, it maintains minimal elastic decay and excellent fatigue resistance, far outperforming standard stainless steels and conventional nickel-based alloys.
Q4: Which high-end export certifications can be met?
A: We support AMS aerospace standard certification, ASME engineering compliance certification, EN10204 3.1/3.2 certification, and third-party witness testing by SGS/TÜV, making the products suitable for high-end project tenders in aerospace, nuclear power, and gas turbine sectors.
Q5: What are the delivery lead times for different product categories?
A: 7–15 working days for standard stock bars and plates; 10–18 working days for precision spring wire; 20–30 working days for custom precision-machined components and complex forgings. Expedited production is available for urgent, high-priority orders.
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