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" |