Unifit Fastener is one of the most reliable manufacturers, suppliers, and exporters of Inconel X750 Round Bar in India—a precipitation-hardened nickel-chromium superalloy specifically designed for excellent performance at extreme temperatures. It is known all over the world as UNS N07750 and Werkstoff Nr. At high temperature, this alloy has an exceptional combination of high-temperature strength, superior corrosion resistance, and excellent resistance to stress-rupture under sustained mechanical load. Our Inconel X750 bars offer the metallurgical reliability your project demands, whether it's for use in gas turbine hot sections, nuclear reactor springs, or high-performance aerospace fasteners.
We have a stock of UNS N07750 bars in bright, black, polished, forged, round, hex, square, flat, and billet diameters from 5 mm to 500 mm in 3000 mm long lengths to meet your requirements. Each product is provided with full mill test certificates, third-party inspection reports, and conformed to the following standards: ASTM B637, ASME SB637, AMS 5669/5698/5699, EN/DIN International. Our Mumbai manufacturing facility maintains standing stock of Inconel X750 Round Bar from 5 mm to 200 mm diameter for domestic dispatch within 2–5 business days, with larger-diameter forged bars (up to 1,000 mm OD) manufactured to order in 15–30 working days and competitive export timelines to the Middle East, Southeast Asia, Europe, and beyond.
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Inconel X750 Round Bar Specification
| Specification Category |
Inconel X-750 Round Bar Details |
| Material Grade | Inconel® X-750 / UNS N07750 / WNR 2.4669 |
| Product Types | Round Bar, Hollow Bar, Forged Bar, Bright Bar, Hex Bar, Square Bar |
| Outside Diameter (OD) | 10 mm to 1000 mm |
| Maximum Thickness | Up to 700 mm |
| Standard Lengths | 3 to 6 meters |
| Manufacturing Process | Hot Rolled, Cold Rolled, Forged, Precision Machined |
| Applicable Standards | ASTM B637, ASME SB637, AMS 5667, AMS 5668, AMS 5669, UNS N07750, WNR 2.4669 |
| Available Shapes | Round, Flat, Hexagonal, Square, Rectangular, Hollow |
| Forging Techniques | Open Die Forging, Closed Die Forging, Impression Die Forging, Drop Forging, Upset Forging, Hot & Cold Forging |
| Heat Treatment Services | Solution Annealing, Age Hardening, Quench & Tempering, Stress Relieving, Hardening |
| Additional Processing | Boring, Machining, Coating, Surface Conditioning |
| Supply Conditions | Annealed, Hardened, Turned, Rough Machined, Precipitation Hardened |
| Surface Finishes | Forged Black, Proof Machined, Bright Finished, Custom Machined |
| Quality Testing | Chemical Analysis, Positive Material Identification (PMI), Ultrasonic Testing (UT), Liquid Penetrant Testing (LPT), Non-Destructive Testing (NDT) |
| Manufacturing Capabilities | Forging, Heat Treatment, CNC Machining, Saw Cutting |
| Inspection Documents | Mill Test Certificate (MTC), Raw Material Certificate, Third-Party Inspection Reports, 100% Radiography Reports (when specified) |
| Packaging Options | Carton Boxes, Protective Wrapping Paper, Export-Grade Wooden Cases |
| Key Advantages | High Strength at Elevated Temperatures, Excellent Oxidation Resistance, Good Fatigue Strength, Outstanding Creep Resistance |
| Supplier Benefits | Consistent Quality Control, On-Time Delivery, Complete Traceability Documentation, Custom Manufacturing Support |
Types of Inconel X750 Round Bars We Supply
Product Overview & Equivalent Standards
| Standard System |
Designation |
| UNS (Unified Numbering System) | N07750 |
| ASTM / ASME Specification | ASTM B637 / ASME SB637 |
| AMS Specifications | AMS 5669, AMS 5698, AMS 5699, AMS 5667, AMS 5668 |
| Werkstoff Nr. (DIN / EN) | 2.4669 |
| Common Trade Names | Nickelvac X750, Pyromet X750, Haynes X750, Nicorros 7016 |
| JIS Standard | NCF 750 |
| NACE Compliance | MR0175 / ISO 15156 |
Chemical Composition – Inconel X-750 (UNS N07750)
| Element | Symbol | Content (wt%) |
| Nickel + Cobalt | Ni + Co | 70.0 min |
| Chromium | Cr | 14.0 – 17.0 |
| Iron | Fe | 5.0 – 9.0 |
| Titanium | Ti | 2.25 – 2.75 |
| Aluminium | Al | 0.40 – 1.0 |
| Niobium + Tantalum | Nb + Ta | 0.70 – 1.20 |
| Manganese | Mn | 1.00 max |
| Silicon | Si | 0.50 max |
| Copper | Cu | 0.50 max |
| Carbon | C | 0.08 max |
| Sulphur | S | 0.01 max |
Mechanical & Physical Properties
Mechanical Properties
| Property | Value | Unit |
| Density | 8.28 | g/cm³ |
| Melting Point | 1,393 – 1,427 | °C |
| Tensile Strength (Ultimate) | 1,267 | MPa |
| Yield Strength (0.2% Offset) | 868 | MPa |
| Elongation in 2 inches | 25 | % |
| Hardness (Brinell) | ≤ 400 | HB |
| Modulus of Elasticity | 207 | GPa |
| Poisson's Ratio | 0.30 | — |
Physical / Thermal Properties
| Property | Value | Unit |
| Thermal Conductivity | 9.6 | W/m·K |
| Specific Heat Capacity (25°C) | 0.12 | BTU/lb·°F |
| Electrical Resistivity | 0.48 | μΩ·cm |
| Coefficient of Thermal Expansion (20–100°C) | 11.3 | μm/m·°C |
| Young's Modulus | 207 | GPa |
Hardness Range by Heat Treatment Condition
| Heat Treatment Condition | Hardness (HRB) | Hardness (HRC) |
| Solution Annealed | 85–95 HRB | ~30 HRC |
| Age Hardened H900 | 90–100 HRB | 32–36 HRC |
| Age Hardened HT100 | 95–105 HRB | 36–40 HRC |
| Age Hardened H1100 | 95–105 HRB | 36–40 HRC |
| Age Hardened H1200 | 100–110 HRB | 40–44 HRC |
Size Range & Dimensional Specifications
| Parameter | Details |
| Specifications | ASTM B637 / ASME SB637, AMS 5669, AMS 5698, AMS 5699, EN, DIN, JIS, BS, AISI |
| Size Range | 5 mm to 500 mm |
| Diameter Range | 0.1 mm to 100 mm (precision); up to 1,000 mm (forged) |
| Length | 100 mm to 3,000 mm; custom lengths available on request |
| Finish | Bright, Black (as-forged), Polished, Rough Turned, Proof Machined |
| Tolerance Grades | H8, H9, H10, H11, H12, H13 or as per client requirement |
| Form | Round, Square, Hex (A/F), Rectangle, Flat, Billet, Ingot, Forging |
| Surface | Hot Rolled Pickled, Sand Blasted, Cold Drawn, Bright, Polished, Hairline |
| Condition / Supply State | Hardened, Turned & Rough, Annealed, Precipitation-Hardened |
Hollow Bar Tolerance Chart (Nickelvac X750)
| Outer Dia OD (mm) | Inner Dia ID (mm) | Tolerance OD (mm) | Tolerance ID (mm) |
| 50 | 30 | ±0.5 | ±0.4 |
| 75 | 50 | ±0.6 | ±0.5 |
| 100 | 70 | ±0.8 | ±0.6 |
| 150 | 100 | ±1.0 | ±0.8 |
| 200 | 150 | ±1.2 | ±1.0 |
| 250 | 200 | ±1.5 | ±1.2 |
Heat Treatment Procedures – Inconel X-750 Forged Bars
| Heat Treatment Method | Temperature Range (°C) | Duration | Cooling Method |
| Solution Annealing | 980–1,065 | 1–2 hours | Rapid air or water quench |
| Precipitation Hardening | 705–845 | 10–20 hours | Air cooling |
| Stabilisation Treatment | 845–900 | 12–16 hours | Air cooling |
Industries & Applications
Inconel X750 Round Bar from Unifit Fastener are used across demanding sectors where reliability at elevated temperatures is non-negotiable:
| Industry | Specific Applications |
| Aerospace & Defence | Gas turbine blades, jet engine hot-section components, aircraft exhaust systems, rocket motor parts |
| Oil & Gas | Downhole tubing, wellhead equipment, high-pressure valve stems, offshore platform hardware |
| Nuclear Power | Reactor core springs, fuel rod alignment components, control rod mechanisms |
| Automotive / Motorsport | Turbocharger components, exhaust valves, high-temperature spring assemblies |
| Chemical Processing | Reactor vessels, agitator shafts, heat exchanger baffles, pump shafts in corrosive environments |
| Power Generation | Steam turbine discs, transition ducts, high-temperature fasteners, combustion liners |
| Marine Engineering | Seawater pump shafts, propulsion hardware, subsea manifold components |
| Food & Pharmaceutical | High-integrity processing equipment requiring corrosion-free alloy surfaces |
Inconel X-750 vs Inconel 625 – High-Temperature Performance Comparison
| Property | Inconel X-750 | Inconel 625 |
| Max Operating Temperature | 1,600°F (870°C) | 1,800°F (982°C) |
| Tensile Strength (RT) | 1,300 MPa | 1,380 MPa |
| Yield Strength (RT) | 620 MPa | 690 MPa |
| Elongation (RT) | 40% min. | 35% min. |
| Ultimate Tensile Str. @ 537°C | 1,240 MPa | 1,150 MPa |
| Yield Strength @ 537°C | 830 MPa | 890 MPa |
| Creep Resistance | Good creep, notch sensitive | Excellent creep resistance |
| Precipitation Hardening | Yes – significant strengthening | No (solid-solution hardened) |
| Best Suited For | High-strength spring & fastener applications | Corrosive chemical environments |
Key Features & Advantages of Inconel X750 Round Bar
| Feature | Benefit |
| Precipitation Hardenable | Achieves tensile strengths up to 1,400 MPa after ageing treatment |
| Chloride-Ion Stress Corrosion Resistance | Safe for seawater, brine, and acidic chloride environments |
| Outstanding High-Temperature Strength | Retains structural integrity from cryogenic conditions up to 870°C |
| Low Creep Rate at High Stress | Ideal for components under sustained loads at elevated temperatures |
| Excellent Weldability & Machinability | Supports TIG, MIG, plasma welding; CNC machining with carbide tools |
| Wide Oxidising Environment Resistance | Performs reliably in sulphur-rich, steam, and combustion atmospheres |
| Fatigue & Fracture Toughness | Extended service life in cyclic loading environments |
Testing, Certification & Quality Standards
Every Inconel X-750 bar supplied by Unifit Fastener undergoes rigorous quality verification. Our quality management system is aligned to ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and PED 2014/68/EU.
| Test / Certification | Details |
| Chemical Testing | Optical emission spectrometry (OES) for full elemental verification |
| PMI Testing (Positive Material Identification) | Handheld XRF testing on 100% of heat lots |
| Mechanical Testing | Tensile, yield, hardness, and elongation testing per ASTM E8 |
| Ultrasonic Testing (UT) | Volumetric inspection per ASTM A388 for forged bars |
| Liquid Penetrant Testing (LPT) | Surface defect detection per ASTM E165 |
| NDT (Non-Destructive Testing) | Eddy current and magnetic particle inspection available |
| 100% Radiography Test | For hollow and pressure-rated bar products |
| Mill Test Certificate (MTC) | Full chemical and mechanical properties traceable to heat number |
| Third-Party Inspection | SGS, Bureau Veritas, TUV, Lloyds accepted |
| Raw Material Certificate | Country of origin and heat/lot number traceability |
Packaging & Export Delivery
| Parameter | Details |
| Standard Packaging | Carton box, protective paper, wooden case, or crates for bars |
| Export Marking | Heat number, size, grade, standard, and country of origin marked on every bundle |
| Port of Export | JNPT Mumbai, Mundra, Chennai – with LCL / FCL container options |
| Export Destinations (Select) | UAE (5 days), Saudi Arabia (7 days), Singapore (8 days), UK (30 days), USA (40–60 days) |
| Domestic Delivery | Pan-India dispatch within 2–5 business days from ready stock |
| Export Price Note | 5% additional charge applies on FOB price for export destinations |
Value-Added Services
- Age Hardening & Precipitation Heat Treatment
- Solution Annealing & Normalising
- Q&T (Quench & Temper) / Soft / Solution Annealed Condition
- Normalising & Coating
- Cut-to-Length Sawing, Boring & Drilling
- Forging & Impression Die / Closed Die / Open Die Forging
- CNC Machining & Turning to Net-Near Shape
- Ultrasonic & Radiographic Testing on Request
- Customer Drawing-Based Manufacture Available
Why Choose Unifit Fastener?
| Our Strength | What It Means for You |
| Established Manufacturer & Exporter | Direct factory pricing — no middleman markup |
| ISO & PED Certified Facility | Internationally recognised quality system you can trust |
| Pan-India Stock & Fast Dispatch | Ready inventory means shorter lead times |
| Custom Size & Shape Capability | We produce to your exact drawing, tolerance, and finish |
| 24/7 Technical & Sales Support | Engineers available for alloy selection and application guidance |
| Competitive Pricing Guarantee | We match or beat any genuine written quote |
| Global Export Network | 100+ countries supplied — we handle export documentation |
Unifit Fastener manufactures, suppliers and exports of Inconel X-750 Round Bars to various countries such as Kazakhstan, Yemen, Chile, Mexico, Croatia, Peru, Spain, Iraq, Tunisia, Poland, Lebanon, Egypt, Kazakhstan, such as Angola, Serbia, Sweden, Hong Kong, Libya, Portugal, Iran, Pakistan, Ghana, Morocco, Trinidad & Tobago, Chile, Costa Rica, Australia, Bolivia, Afghanistan, Algeria, Nigeria, Venezuela, Lebanon, Iran, Poland, Kenya, China, Vietnam, Singapore, Yemen, Jordan, Croatia, Ecuador, South Korea, Netherlands, Tunisia, United Kingdom, Saudi Arabia, Azerbaijan, Indonesia, Brazil, Italy, Sri Lanka, Mongolia, Canada, Peru, Czech Republic, Turkey, Taiwan, Mexico, Gabon, Russia, Denmark, New Zealand, Kazakhstan, Nigeria, Estonia, Belgium, Slovakia, Belarus, Argentina, Romania, Poland, Bahrain, Hungary, Norway, Jordan, Mexico, Qatar, Australia, Chile, Kazakhstan, Switzerland, United Arab Emirates, France, South Africa, Lithuania, Austria, Colombia, Iraq, Kuwait, Japan, Egypt, Bhutan, Finland, Israel, Thailand, Bangladesh, Bulgaria, Malaysia, Oman, United States, Greece, Ukraine, Philippines, Spain.
