NIMONIC alloy 75 (UNS N06075/W.Nr. 2.4951 & 2.4630) is an 80/20 nickel-chromium alloy with controlled additions of titanium and carbon. First introduced in the 1940s for turbine blades in the prototype Whittle jet engines, it is now mostly used for sheet applications calling for oxidation and scaling resistance coupled with medium strength at high operating temperatures. It is still used in gas turbine engineering and also for industrial thermal processing, furnace components and heat-treatment equipment. It is readily fabricated and welded.
NIMONIC 75 Alloy Chemical Composition, %:
Carbon ........................................................................0.08-0.15
Chromium....................................................................18.0-21.0
Copper..........................................................................0.5 max.
Iron................................................................................5.0 max.
Manganese ...................................................................1.0 max.
Silicon ...........................................................................1.0 max.
Titanium...........................................................................0.2-0.6
Nickel............................................................................Balance
Heat-Treatment
For bar 30-60 minutes at 1050°C (1920°F) followed by air cooling.
For sheet 5-10 minutes at 1050°C (1920°F) followed by air cooling or, before welding, 5-10 min/1050°C (1920°F)/AC + an optional 10 min/1050°C (1920°F)/AC.
Hot Working
NIMONIC alloy 75 can be hot worked in the range 1220- 950°C (2230-1740°F).
Cold Working
The good ductility and malleability of annealed NIMONIC alloy 75 make it amenable to many methods of cold deformation. The alloy is subject to rapid strain hardening. Because of this increased strength, large reductions can be made without rupture.
Available Products and Specifications
NIMONIC alloy 75 is designated as UNS N06075 and Werkstoff Numbers 2.4951 and 2.4630. Other designations include AFNOR NC20T, AICMA Ni-P91HT and DIN NiCr20Ti. Alloy 75 is available as sheet, strip, plate, round bar, forging stock, wire, tube and extruded section.
Rod, Bar, Wire and Forging Stock - BS HR 5, BS HR 504, DIN 17752, AECMA PrEN2306, AECMA PrEN2307, AECMA PrEN2402, ISO 9723-25
Plate, Sheet and Strip - BS HR 203, DIN 17750, AECMA PrEN2293, AECMA PrEN2302, AECMA PrEN2411, ISO 6208
Pipe and Tube - BS HR 403, DIN 17751, AECMA PrEN2294, ISO 6207
Other Product Forms - DIN 17742, AECMA PrEN2308
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.
