Inconel X-750 Flanges

What are Inconel X-750 Flanges?

Inconel X-750 flanges are high-performance piping components used to:

• Connect piping systems: Provide strong and leak-proof joints
• Withstand high temperatures and stress: Ideal for high-heat and high-pressure applications
• Resist corrosion and oxidation: Suitable for harsh chemical and thermal environments
• Ensure long-term reliability: Maintain structural integrity under extreme conditions

These flanges are made from a nickel-chromium alloy strengthened by precipitation hardening, offering excellent mechanical strength and fatigue resistance.

Composition Highlights (Typical)

Inconel X-750:

• Nickel (Ni): ≥ 70% → Provides corrosion resistance and strength
• Chromium (Cr): 14 – 17% → Enhances oxidation resistance
• Iron (Fe): 5 – 9%
• Niobium (Nb) + Tantalum (Ta): 0.7 – 1.2% → Strengthening elements
• Aluminum (Al): 0.4 – 1.0% → Improves oxidation resistance
• Titanium (Ti): 2.25 – 2.75% → Enhances strength
• Carbon (C): ≤ 0.08%

Key Advantage: Precipitation hardening gives Inconel X-750 exceptional strength and creep resistance at elevated temperatures.

Key Features of Inconel X-750 Flanges

• Excellent high-temperature strength: Maintains mechanical properties at elevated temperatures
• Outstanding creep and rupture resistance
• Superior oxidation and corrosion resistance
• High fatigue strength: Performs well under cyclic stress
• Good resistance to relaxation: Ideal for spring and bolting applications
• Excellent durability in extreme environments
• Long service life with minimal maintenance

Mechanical Properties

• Tensile Strength: ~930 – 1200 MPa → Very high strength
• Yield Strength: ≥ 620 MPa → Excellent resistance to deformation
• Elongation: ≥ 20% → Good ductility

These properties make Inconel X-750 suitable for high-stress and high-temperature applications.

Physical Properties

• Density: ~8.28 g/cm³ → Strong and durable
• Melting Range: 1390 – 1430°C → Suitable for high heat environments
• Modulus of Elasticity: ~210 GPa → High stiffness
• Thermal Conductivity: ~12 W/m•K → Moderate heat transfer
• Coefficient of Expansion: ~13 µm/m°C → Stable under temperature changes

Corrosion & Heat Resistance

Inconel X-750 flanges offer excellent resistance to:

• High-temperature oxidation
• Creep and stress rupture
• Thermal fatigue and cyclic loading
• Chemical corrosion in harsh environments
• Oxidizing and mildly reducing conditions

This makes them ideal for aerospace, power generation, oil & gas, and chemical processing industries.

Heat Treatment

• Solution Annealing: 980 – 1150°C
• Age Hardening (precipitation hardening): Improves strength and hardness

This combination enhances mechanical properties and long-term performance.

Weldability

Inconel X-750 flanges can be welded using:

• TIG (GTAW) → High-quality precision welding
• MIG (GMAW) → Efficient fabrication
• SMAW → Suitable for industrial applications

Recommendations:

• Use matching filler materials
• Maintain controlled heat input
• Post-weld heat treatment may be required

Machinability

• Difficult machinability due to high strength
• Use carbide or ceramic tools
• Maintain low cutting speeds
• Apply sufficient coolant to prevent overheating

Standards & Specifications

• ASTM B564
• ASME SB564
• ANSI B16.5
• ANSI B16.47
• ASTM B637

These standards ensure global quality compliance.

Available Types of Inconel Flanges

• Weld Neck Flanges → High-pressure systems
• Slip-On Flanges → Easy installation
• Blind Flanges → Pipe closure
• Socket Weld Flanges → Small pipelines
• Threaded Flanges → Non-weld systems
• Lap Joint Flanges → Easy maintenance
• Orifice Flanges → Flow measurement

Sizes & Specifications

• Size Range: ½ inch to 48 inches
• Pressure Class: 150#, 300#, 600#, 900#, 1500#, 2500#
• Type: Forged

Surface Finish:

• Pickled → Clean and corrosion-resistant
• Polished → Smooth finish
• Machined → Precision engineered

(Custom sizes available as per requirement)

Applications of Inconel X-750 Flanges

• Aerospace Industry: Used in gas turbines and high-temperature components.
• Power Generation: Applied in nuclear reactors and thermal systems.
• Oil & Gas Industry: Used in high-pressure and high-temperature applications.
• Chemical Processing: Handles aggressive environments.
• Marine Industry: Suitable for corrosive marine conditions.

Quality Testing & Inspection

All flanges undergo strict quality checks:

• Chemical composition testing → Ensures correct alloy
• Mechanical testing → Verifies strength and durability
• Dimensional inspection → Confirms accuracy
• Surface examination → Detects defects
• PMI testing → Confirms material identity

Mill Test Certificates (MTC) and third-party inspection reports are provided.

Packaging & Delivery

• Export-quality wooden packaging
• Protective wrapping
• Proper labeling and traceability
• Safe and timely global shipping

Why Choose Virami Steel Hub?

• Trusted Inconel flange manufacturer in Mumbai
• Large inventory availability
• Competitive pricing
• Custom manufacturing solutions
• Compliance with international standards
• Strong export network
• Dedicated customer support

Conclusion

Inconel X-750 Flanges are an excellent choice for applications requiring high strength, creep resistance, and stability at elevated temperatures. Their superior mechanical properties and corrosion resistance make them ideal for aerospace, power generation, oil & gas, and chemical processing industries.

Virami Steel Hub delivers high-quality Inconel X-750 flanges that meet global standards, ensuring long-term reliability, safety, and performance.