General Information for Steel A7
| Material Group |
P - Steel |
| Sub-Grou |
Tool Steel |
| Tensile Strengt |
795-910[N/mm^2] |
| Machinability Rang |
23%-55% |
Equivalent International Designations for Steel A7
Chemical Composition for Steel A619
| Element |
Amount |
| Vanadium (V) |
3.90-5.15% |
| Manganese (Mn) |
0.80 max% |
| Molybdenum (Mo) |
0.90-1.40% |
|
| Chromium (Cr) |
5.00-5.75% |
| Carbon (C) |
2.00-2.85% |
| Tungsten (W) |
0.50- 1.50% |
| Silicon (Si) |
0.50 max% |
| Nickel (Ni) |
Max 0.30% |
Cutting Speeds Recomendations for Tool Steel and High Alloy Steel
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
100-240 |
330-790 |
| Milling |
65-150 |
210-490 |
| Parting |
50-115 |
160-380 |
| Grooving |
55-135 |
180-440 |
| Drilling |
40-95 |
130-310 |
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 Steel A7
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Steel A7
| Honing Size |
0.05-0.08 mm / 0.002-0.003" |
| Rake Angle |
11° -13° |
| Land Angle |
Positive |
| Land Width |
0.20-0.30 mm / 0.008-0.012" |
