Nickel
Ni
≥74.8.
Chromium
Cr
19.0~22.0%
Iron
Fe
≤1.5%
Manganese
Mn
0.7%
Silicon
Si
≤0.3%
Titanium
Ti
0.15~0.35%
Aluminium
Al
≤0.15%
Carbon
C
≤0.12%
Sulphur
S
≤0.02%
Phosphorus
P
≤0.02%
Nimonic Alloy 75 is a nickel-chromium alloy with good mechanical properties and oxidation resistance at high temperatures. It has simple chemical composition, satisfactory thermal strength and high plasticity below 800 ℃, and good anti-oxidation, thermal fatigue, cold stamping and welding process performance. The alloy is single-phase austenite after solution treatment, and the structure is stable during use.
Nimonic 75A is mainly used for turbine engine combustion chamber components operating below 800℃ and other high temperature components that require oxidation resistance below 1100℃ but bear little load.Nimonic75 is widely used for sheet metal fabrication in gas turbine engines, industrial furnace components, heat treatment equipment and fittings, and nuclear applications.
Nimonic 75A High Temperature High Resistance Alloy is a nickel chromium iron alloy with a controlled carbon content and a small amount of titanium.
Nimonic 75A has the following features:
Good resistance to oxidizing atmospheres up to 1100°C (2000°F);
High resistance to scale formation at temperatures up to 1000 °C (2000 °F);
Good mechanical properties at temperatures up to 1000°C (1830°F);
Physical properties
| Density(g/cm3) |
8.4 |
| Resistivity(Ωmm2/m) |
1.09 |
| Thermal conductivity, λ/ W/(m*℃) |
15.1(100℃） |
| Melting point |
1374~1420 |
| Elastic Modulus, E/ Gpa |
224 |
| Specific heat capacity，J/kg•℃ |
565.2 |
Mechanical properties
| Strength limit |
650 MPa |
| Yield strength (0.2% deviation) |
270 MPa |
| Relative elongation, min. |
25% |
| Heat treatment process of products |
| Availability |
Heat treatment (after forming) |
| Stress relief annealing |
Decompress at 450 - 470°C for 30 - 60 minutes, then air cool. |
| Condition |
Approximate tensile strength |
Service temperature |
|
| Solution annealing |
700-800N/mm2 |
-200 to +1100℃ |
|
| Cold drawn |
1200-1500N/mm2 |
-200 to +1100℃ |
|
Supply form and specification
| Alloy grade |
Form |
Specification |
| Nimonic 75A |
Wire |
Diameter=0.03mm~8mm |
| Nimonic 75A |
Flat wire |
Width=0.4~40mm |
Thick=0.03~2.9mm |
| Nimonic 75A |
Strip |
width=8~250mm |
ThickT=0.1~3.0mm |
| Nimonic 75A |
Foil |
width=6~120mm |
Thick=0.003~0.1mm |
| Nimonic 75A |
Bar |
Diameter=8~100mm |
Long=50~1000 |
Superalloy SeriesGH3030 GH4145 GH4169
Hastelloy C2 Hastelloy C4 Hastelloy C276 Hastelloy X
Incoloy 800H Incoloy 825
Inconel 600 Inconel 625 Inconel 718 Inconel 725 Inconel X750
Monel 400 Monel K500
Nimonic 75A Nimonic263
