General Information for Material 521
| Material Group |
H - Hardened Steel |
| Hardness |
510.0 HB |
| Tensile Strength |
1590-1800[N/mm^2] |
| Machinability Range |
0% - 0% |
Equivalent International Designations for Material 431 (HT)
Chemical Composition for Material 521
| Element |
Amount |
| Nickel (Ni) |
4% |
| Chromium (Cr) |
2% |
| Molybdenum (Mo) |
0.5% |
| Iron (Fe) |
91.4% |
| Manganese (Mn) |
1.2% |
| Silicon (Si) |
0.5% |
| Carbon (C) |
0.32% |
| Phosphorus (P) |
0.025% |
| Sulfur (S) |
0.005% |
Cutting Speeds Recomendations for Material 521
| Application |
Vc (m/min) |
Vc (SFM) |
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 Material 521
Grade for Turning
| Grade |
Coating |
Apps Range |
05 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
| No data available in table |
|
Grade for Parting Off
| Grade |
Coating |
Apps Range |
05 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
| No data available in table |
Grade for Grooving
| Grade |
Coating |
Apps Range |
05 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
| No data available in table |
Grade for Milling (Indexable)
| Grade |
Coating |
Apps Range |
05 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
| No data available in table |
Recommended Insert Cutting Edge Geometry for Material 521
