The Nimonic alloy 75 is a Nickel-Chromium based alloy that comprises 80% nickel, 20% chromium, and with some additions of Carbon and Titanium. Also, this alloy exhibits good corrosion resistance and heat tolerance and provides medium strength at higher temperatures. This alloy came into being as the blades of turbines in the 1940s.
Nimonic 75 is readily used in many industries for its excellent weldability and fabrication properties. It finds uses in aerospace and nuclear industries, along with the other industries involving heat treatments.
Common Names:
UNS N06075
BS HR5
HR203
HR403
HR504
DIN 17742
DIN 17750-17752
Executive Standards:
Rod, Bar, Wire, and Forging Stock
BS HR 5, 504
DIN 17752
AECMA PrEN 2306, 2307, 2402
ISO 9723, 9724, 9725
MSRR 7004
Plate, Sheet, and Strip
BS HR 203
DIN 17750
AECMA PrEN2293, 2302, 2411
ISO 6208
MSRR 7104
Pipe, and Tubes
BS HR 403
DIN 17751
AECMA PrEN2294
ISO 6207
Others
DIN 17742
AECMA PrEN2308
Chemical Properties:
| Nickel (%) | 70-80 |
| Chromium (%) | 18-21 |
| Iron (%) | Max 5 |
| Silicon (%) | Max 1 |
| Manganese (%) | Max 1 |
| Others (%) | remainder |
Mechanical Properties:
| Yield Strength (MPa) | 275 |
| Yield Strength (ksi) | 40 |
| Tensile Strength (MPa) | 750 |
| Tensile strength (ksi) | 109 |
| Break Elongation | 42% |
| Elasticity Modulus (GPa) | 206 |
| Elasticity Modulus (ksi) | 29878 |
Physical Properties:
| Density | Lb/In3 | 0.302 |
| g/cm3 | 8.37 | |
| Expansion Coefficient | 70-212oF | 6.1 x 10-6 |
| 20-100 oC | 11.0 | |
| Specific heat | J/kg-°C | 461 |
| BTU/lb-°F | 0.110 | |
| Thermal Conductivity | W/m-°C | 11.7 |
| BTU-in/hr-ft2–oF | 81.1 | |
| Melting point | oF | 2450-2520 |
| oC | 1340-1380 |
Key Features:
Great scaling resistance at high temperature: This Nimonic alloy is well regarded for its amazing scaling resistance at a high temperature. Thus, it finds its usage in sheet applications, where medium strength is enough. Also, it is used in the manufacturing of machine parts implemented in thermal processing, heat-treatment equipment, etc.
Excellent corrosion resistance: Nimonic 75 is well-known for being an alloy that efficiently tackles corrosive acids and gases, thus offering flexibility in its use across multiple manufacturing plants.
Easy fabrication and welding: This alloy is particularly famous for offering high weldability, even by using standard techniques. Also, it can be readily fabricated in quite less time and labor involvement.
Product Forms Available:
Bars
Rods
Wires
Forging stock
Plate
Sheet
Strip
Pipe
Tubes
Extruded section
Hexagon flats
Applications:
Aerospace sheet metal fabrication
Components of gas turbine engines
Industrial furnace parts
Heat treatment equipment and fixtures
Nuclear engineering
Thermal processing industries
Possible Alternate Grades:
Nimonic alloy 105: This superalloy can handle high temperatures and also offer excellent ductility and weldability. It is efficiently used for making turbine blades, bolts, and fasteners.
Nimonic 90: The alloy Nimonic 90 is an age-hardenable creep-resisting alloy used for services at temperatures up to 920°C. It can efficiently handle stress and hence used in making turbine blades, hot working tools, etc.
FAQ
What are the pre-requisites for welding Nimonic 75?
The pre-requisite is that the alloy should be annealed before welding.
What is the ideal temperature for hot-working of this material?
Hot-working of this alloy can be done at temperature ranges of 1220-950°C (2230-1740°F).
What kind of machining techniques can be used for Nimonic 75?
The conventional machining techniques used for iron alloys can be used here as well.
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.
