Nickel-based alloys are widely used in industries that demand high-performance materials resistant to extreme conditions such as high temperatures, corrosion, and oxidation. Among these, NIMONIC 75 BARS and NIMONIC 80 BARS are key nickel-chromium alloys. They are made for high-temperature uses. Both materials are known for their strength, durability, and resistance to environmental degradation. But they vary in composition, properties and uses. This blog discusses the difference between NIMONIC 75 BARS and NIMONIC 80 BARS so that you can select the best material for your particular requirements.
Difference Between NIMONIC 75 BARS and NIMONIC 80 BARS
Composition and Chemical Elements
The primary difference between NIMONIC 75 BARS and NIMONIC 80 BARS is their chemical composition. While both alloys contain nickel and chromium as their base elements, the addition of other elements alters their properties.
NIMONIC 75 BARS Composition: Nickel (Ni): 70-77% Chromium (Cr): 18-21% Iron (Fe): 5% Titanium (Ti): 0.2-0.5% Carbon (C): 0.08-0.15%
NIMONIC 80 BARS Composition: Nickel (Ni): 70-80% Chromium (Cr): 18-21% Iron (Fe): 3% Titanium (Ti): 1.8-2.7% Aluminum (Al): 1.0-1.8% Carbon (C): 0.10%
Key Differences in Composition: NIMONIC 80 BARS has higher amounts of titanium and aluminum, making it stronger and more heat-resistant. NIMONIC 75 BARS has a simpler composition, making it easier to manufacture and process.
Mechanical and Physical Properties
The difference in composition results in varying mechanical and physical properties between NIMONIC 75 BARS and NIMONIC 80 BARS.
NIMONIC 75 BARS Properties: Melting Point: 1380-1420°C Density: 8.37 g/cm³ Yield Strength: ~275 MPa Tensile Strength: ~650 MPa Hardness: ~180 HB
NIMONIC 80 BARS Properties: Melting Point: 1320-1380°C Density: 8.20 g/cm³ Yield Strength: ~380 MPa Tensile Strength: ~900 MPa Hardness: ~250 HB
Key Differences in Properties
NIMONIC 80 BARS is stronger and harder than NIMONIC 75 BARS, making it suitable for high-stress applications. NIMONIC 75 BARS is easier to machine and work with due to its lower hardness and strength.
Corrosion and Oxidation Resistance
Both alloys resist corrosion and oxidation well. This makes them great for high-temperature environments. However, their performance varies slightly:
NIMONIC 75 BARS has medium oxidation resistance but is less resistant to creep and stress corrosion than NIMONIC 80 BARS. NIMONIC 80 BARS offers great oxidation and creep resistance. Its higher titanium and aluminum content makes it better for long-term use in high temperatures.
Applications and Uses
Applications of NIMONIC 75 BARS:
Aerospace Industry: Used in jet engine components, afterburners, and turbine blades, as it is moderate to high temperatures.
Heat Treatment Equipment: Ideal for annealing boxes, heat exchanger tubing, and furnace parts due to its excellent oxidation resistance.
Chemical Processing Plants: Found in vessels, reactors, and piping systems. They need to resist oxidation and moderate corrosion.
Nuclear Power Plants: Ideal for radiation-resistant parts like structural supports, pressure vessels, and reactor internals.
Automotive Industry: Found in catalytic converter support systems and exhaust manifolds, ensuring durability in tough, high-heat settings.
Gas Turbines: Used in power generation and industrial settings due to their strength against oxidation and thermal fatigue.
Applications of NIMONIC 80 BARS:
Aerospace and Aviation: Utilized in jet engine turbine blades, combustors and exhaust systems where high strength and heat resistance are demanded.
Automotive Industry: NIMONIC 80 BARS are used because of their high-performance vehicle engine valves and turbochargers.
Springs and Fasteners: Utilized in extreme environments such as gas turbines, nuclear reactors, and offshore drilling platforms.
Power Generation: Used in steam and gas turbines at power plants providing strength in high temperature and high pressure situations.
Petrochemical and Oil & Gas Industry: Used in processing tools such as refinery furnaces, reformer tubes and cracking units.
Medical Industry: Applications in medical devices and implants, exhibiting corrosion resistance and high strength.
Industrial Furnace Components: Includes high-temperature furnace components, heating coils and burner nozzles.
Which One to Choose?
The choice of NIMONIC 75 BARS or NIMONIC 80 BARS will depend on the unique requirements of your project:
If you need an affordable, easy-to-machine alloy with satisfactory resistance to high temperature, NIMONIC 75 BARS is appropriate.
If your application demands higher strength, superior oxidation resistance, and durability in extreme conditions, NIMONIC 80 BARS is the better option.
Our product range
| Product Form | Standard Specifications | Typical Sizes / Dimensions | Common Standards (Examples) |
|---|---|---|---|
| Sheet & Plate | Thickness: 0.5mm – 50mm Width: 1000mm – 2000mm Length: 2000mm – 6000mm |
• Coils / Strips • Cut-to-Length Sheets • Heavy Plates |
ASTM B168, B906 ASME SB168 EN 10095, DIN 17752 |
| Bar & Rod | Diameter: 6mm – 300mm Length: 3000mm – 6000mm (straight) |
• Round Bars • Hexagonal Bars • Square Bars • Forging Billets |
ASTM B166 (rod/bar) ASTM B564 (forgings) |
| Pipe & Tube | Seamless Pipe: OD 6mm – 300mm, SCH 5S to XXS Welded Tube: OD 10mm – 500mm, Wall as required Heat Exchanger Tube: OD 12.7mm – 50mm |
• Hydraulic & Instrumentation Tubing • Boiler & Heat Exchanger Tubes • Mechanical Tubing |
ASTM B167, B163, B517/B75 ASTM B622 (seamless) ASTM B619/B626 (welded) |
| Fittings & Flanges | Class: 150 LBS to 2500 LBS Schedules: Matching pipe specifications |
• Elbows (90°/45°) • Tees, Reducers, Caps • Socket Weld & Butt-Weld Fittings • Slip-On & Weld Neck Flanges |
ASTM SB366 ASME B16.9 / B16.5 MSS-SP-43 / SP-75 |
| Wire & Electrodes | Diameter: 0.5mm – 5.0mm (Wire) Standard Sizes (Covered Electrodes) |
• Welding Wire (spool, coil) • Filler Metal Rods • SMAW Electrodes |
AWS A5.14 / A5.11 EN ISO 18274 / 14172 |
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Our factory
Our factory is equipped with state-of-the-art production facilities. The facility features advanced melting and thermo-mechanical processing lines, including Vacuum Induction Melting (VIM) furnaces and precision rolling mills, which transform raw materials into high-performance alloy products in forms such as plates, sheets, tubes, and bars. To ensure that every product meets the most stringent international standards and customer drawing requirements, we operate an in-house laboratory with comprehensive testing capabilities. Testing includes spectrometric chemical analysis, mechanical property testing, and non-destructive testing (NDT) methods such as ultrasonic and penetrant inspection. Governed by a certified quality management system, our integrated production process-from raw materials to finished products-ensures full traceability and consistent quality assurance.
