What is Alloy 75 Rod Nimonic?
The material Nimonic 75 is an 80/20 nickel-chromium alloy with controlled additions of titanium and carbon. This product was first introduced in the 1940s for turbine blades in the Whittle jet engine prototype and is mainly used for sheet applications requiring medium strength due to oxidation and scaling resistance at high operating temperatures. Nimonic 75 is currently used in gas turbine technology as well as for industrial heat treatment, furnace components and heat treatment equipment. It is easy to manufacture and weld.
The material Nimonic 75 should be annealed before welding, but a small amount of cold forming is tolerable. The allowable amount of cold working varies depending on component design, but simple bending and rolling does not necessarily involve pre-annealing prior to welding. The heat affected zone produced by Nimonic 75 material does not cause weld seam decay and post-weld heat treatment is not normally required. If the equipment is required to operate in contact with caustic soda, fluorosilicates or some mercury salts, a stress relieving treatment may be desirable.
Properties of the material Nimonic 75
excellent resistance in oxidising environments up to 1000 °C
Good mechanical properties at high temperatures
good corrosion resistance
Main application of the material Nimonic 75
Steam and gas turbines
nuclear technology
furnace construction
Heat treatment plants
environmental technology
Technical data
| Type: | Rod, round rod |
| Standard classifications: | |
| Material number: | 2.4951 |
| Alloy: | 75 |
| UNS: | N06075 |
| EN: | NiCr20Ti |
Chemical composition (in %):
| Fe | Ni | Cr | Si | Co | Ti |
| max. 5.0% | Rest | 21.0% | 1.0% | 5.0% | 0.6% |
Mechanical properties (standard values at 20°C):
| 0.2% Yield strength Rp - N/mm2 | Tensile strength MPa | Elongation at break A5 % | Modulus of elasticity kN / mm² |
| 235 | 640 | 26 | 221 |
Physical properties (standard values at 20°C):
| Density g/cm3 | Specific heat J/kg K | Thermal conductivity W/(mK) | Electrical resistance Ω-mm2/m |
| 8.2 | 420 | 13 | 1.03 |
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.
