Hangbo Alloy Group
Shanghai · Est. 2012
N06075 technical guide: nominal chemical composition, mechanical and physical properties, corrosion resistance, welding, product forms and ASTM standards...
Nimonic 75 (UNS N06075) is a nickel-chromium alloy (solid solution). Original solid-solution Nimonic alloy. Good oxidation resistance to 980 °C. This guide covers its nominal chemical composition, typical mechanical and physical properties, corrosion behaviour, welding, common applications, available product forms and the ASTM standards that apply — everything a specifier needs to evaluate Nimonic 75 for a project.
Nimonic 75 belongs to the nickel-chromium alloy (solid solution) class of materials. It is original solid-solution nimonic alloy. It is good oxidation resistance to 980 °c. It is very fabricable / weld-friendly.
Nominal (wt%) composition of Nimonic 75 (UNS N06075):
| Element | Composition (wt%) |
|---|---|
| Nickel (Ni) | ≥ 75.0 |
| Chromium (Cr) | 18.0 – 21.0 |
| Iron (Fe) | ≤ 5.0 |
| Titanium (Ti) | 0.20 – 0.60 |
| Aluminium (Al) | ≤ 0.15 |
| Carbon (C) | 0.08 – 0.15 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Cobalt (Co) | ≤ 2.0 |
| Copper (Cu) | ≤ 0.50 |
| Sulphur (S) | ≤ 0.010 |
Typical physical properties:
| Property | Value |
|---|---|
| Density | 8.37 g/cm³ |
| Melting Range | 1340 – 1380 °C |
| Thermal Expansion (20–1000 °C) | 14.0 µm/m·K |
| Thermal Conductivity (100 °C) | 12.0 W/m·K |
| Electrical Resistivity | 1.15 µΩ·m |
| Modulus of Elasticity | 207 GPa |
Typical room-temperature mechanical properties (annealed / specified condition unless noted):
| Property | Typical Value |
|---|---|
| Tensile Strength (Rm) | 700 MPa (102 ksi) |
| Yield Strength, 0.2% (Rp0.2) | 300 MPa (44 ksi) |
| Elongation in 50 mm | 40% |
| Hardness (Rockwell B) | 80 – 95 HRB |
| Property | Value |
|---|---|
| Service temperature | Up to 980 °C |
| Service note | Excellent oxidation resistance |
Nimonic 75 is the original solid-solution nickel-chromium alloy in the Nimonic family, with good oxidation resistance to about 980 °C and useful strength at temperature. Titanium and carbon provide modest precipitation strengthening. It is a cost-effective, fabricable high-temperature alloy for furnace and engine sheet-metal parts.
Welded with matching or 600-type fillers by GTAW/GMAW; the solid-solution structure is very fabrication-friendly and resistant to sensitisation. Post-weld heat treatment is optional.
The grade is supplied to the following common specifications:
| Standard | Product Form / Scope |
|---|---|
| ASTM B168 (ref.) | Plate, sheet & strip reference |
| BS HR/NA series | Nimonic specifications |
| AMS 4583 | Wire reference |
Standards & References. Specifications cited on this page; confirm current revisions with the issuing body.
General references: Nickel Institute · AMPP (corrosion) · SAE International · ASTM International
Nimonic 75 (UNS N06075) is the original solid-solution nickel-chromium alloy of the Nimonic family, with good oxidation resistance to about 980 °C and useful high-temperature strength. Titanium and carbon give modest precipitation strengthening. It is a fabricable, cost-effective high-temperature alloy.
Annealed: ≈ 700 MPa tensile, ≈ 300 MPa yield, 40 % elongation, 80–95 HRB.
75 is a solid-solution alloy (easy to fabricate, moderate strength). 80A adds more Al/Ti for γ′ precipitation hardening and much higher strength, at the cost of more difficult fabrication.
Yes, very easily – with matching or 600-type fillers by GTAW/GMAW. The solid-solution structure resists sensitisation and post-weld heat treatment is optional.
Furnace retorts, muffles and trays, turbine combustion/sheet-metal parts, aircraft exhaust and heat shields, element sheathing and high-temperature springs.
Plate/sheet/strip referenced under ASTM B168, with dedicated Nimonic specs in the BS HR/NA series and wire under AMS 4583.
As a dedicated nickel alloy manufacturer serving aerospace, power generation, chemical processing sectors, Hangbo Alloy Group supplies the grades discussed here across all standard product forms with full ASTM/ASME documentation and EN 10204 3.1 certification. Our material is specified for applications where corrosion resistance, high-temperature strength, and traceable quality are non-negotiable. See our production & testing facilities for more on how every heat is verified.