| Material Group | S - Superalloys (Heat resistant and Titanium) |
| Sub-Group | Superalloy |
| hardness | 90.0 HRB |
| Tensile Strength | 570 [N/mm^2] |
| Machinability Range | 17% |
Nimonic 75 is a nickel-based heat resistant superalloy (HRSA) material with a machinability rating of 17% and hardness of 90 HRB.
Nimonic 75 has 76% nickel and additional alloying elements per the table below.
The main feature of nickel-based alloys is their excellent strength across a wide temperature range combined with good corrosion resistance. In this sub-group, the material standards also define the allowed hardness range, and hardness is a significant factor affecting the machinability (besides the chemical composition).
Nimonic 75 is among the least hard of the nickel-based alloys, and accordingly has relatively high machinability of 17%.
Superalloys should be machined with a positive and sharp cutting edges. Geometries that are suitable for austenitic stainless steel will also work well on HRSA. However, quality manufacturers will have in their catalogs additional geometries that are specifically designed for these challenging materials.
| Standard | Name |
|---|---|
| WNR | 2.4630 |
| DIN | NiCr20Ti |
| UNS | UNS N06075 |
| BS | HR5, 203.4 |
| ANFOR | NC20T |
| Element | Amount |
|---|---|
| Nickel (Ni) | 76% |
| Chromium (Cr) | 20% |
| Iron (Fe) | 4% |
| Manganese (Mn) | 0.45% |
| Aluminum (Al) | 0.1% |
| Titanium (Ti) | 0.35% |
| Carbon (C) | 0.45% |
| Silicon (Si) | 0.45% |
| Application | Vc (m/min) | Vc (SFM) |
|---|---|---|
| Turning | 60-80 | 200-260 |
| Milling | 45-60 | 150-200 |
| Parting | 35-50 | 110-160 |
| Grooving | 50-70 | 160-230 |
| Drilling | 50-70 | 160-230 |
| Honing Size | 0.02-0.05 mm / 0.001-0.002" |
| Rake Angle | 13° -18° |
| Land Angle | Neutral |
| Land Width | 0.10-0.20 mm / 0.004-0.008" |
| Ground Insert | Recommended |
