General Information for Stainless Steel S240
| Material Group |
M - Stainless Steel |
| Sub-Group |
Austenitic Stainless Steel |
| Hardness |
33.0 HB |
| Tensile Strength |
1070 [N/mm^2] |
| Machinability Range |
35% - 45% |
Equivalent International Designations for Stainless Steel S240
Chemical Composition for Stainless Steel S240
| Element |
Amount |
| Iron (Fe) |
69.2% |
| Chromium (Cr) |
12.5% |
| Molybdenum (Mo) |
1.75% |
| Manganese (Mn) |
0.25% |
| Nickel (Ni) |
10.75% |
| Silicon (Si) |
0.25% |
| Copper (Cu) |
1.5% |
| Carbon (C) |
0.03% |
| Phosphorus (P) |
0.01% |
| Sulfur (S) |
0.01% |
| Tungsten (W) |
1.5% |
| Aluminum (Al) |
1.5% |
| Titanium (Ti) |
0.7% |
Cutting Speeds Recomendations for Stainless steel - Austenitic
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
155-195 |
510-640 |
| Milling |
95-125 |
310-410 |
| Parting |
60-80 |
200-260 |
| Grooving |
90-120 |
300-390 |
| Drilling |
45-55 |
150-180 |
Important! The speed estimation is given for an ideal situation:
- Most suitable carbide grade
- Stable tool clamping
- Stable workpiece clamping
- Good quality raw material
- A short overhang of the cutting tool.
- Nominal hardness of the material.
- etc.
Recommended Carbide Grades for Stainless Steel S240
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Stainless Steel S240
| Honing Size |
0.03-0.05 mm / 0.001-0.002" |
| Rake Angle |
9°-11° |
| Land Angle |
Positive |
| Land Widt |
0.20-0.30 mm / 0.008-0.012" |
