General Information for Steel A2
| Material Group |
P - Steel |
| Sub-Group |
Tool Steel |
| Tensile Strength |
750-850[N/mm^2] |
| Machinability Range |
42% |
MACHINABILITY OF A2 STEEL
Steel A2 is a tool steel (high-alloy steel) that has on top of the 1% of carbon an additional 7.9% of manganese, chromium, nickel, and molybdenum. (See details in the table below). Steel A2 has a machinability rating of 42%.
Steel A2 belongs to the "A series" of tool steels. They are classified as air-hardening, cold-work steel and contain high Carbon content (around 1%). Tool Steels in this series (A2-A10) have a machinability rating of 30-40%. The relatively high carbon content yields higher hardness and strength, resulting in low machinability.
SUMMARY:
For turning operations on Steel A2, lower cutting speed is recommended due to the low machinability. Therefore, in most cases it is recommended to use a grade with high hardness and PVD coating . For milling, opt for a grade with relatively hard substrate.
For detailed CARBIDE grades recommendations,check the table below.
Recommended Cutting speed range for turning at stable conditions is 510 - 690 [SFM] / 155 - 210 [m/min].
Recommended Cutting speed range for milling with stable clamping and short over hang is 310 - 430 [SFM] / 95 - 130 [m/min]
For detailed cutting speed recommendations,check the table below.
Equivalent International Designations for Steel A2
| Standard |
Name |
| SAE |
A2 |
| WNR |
1.2363 |
| DIN |
X100CrMoV51 |
| BS |
BA2 |
| SS |
2260 |
| ANFOR |
Z100CDV5 |
| UNI |
X100CrMoV51KU |
| UNF |
X100CrMoV5F5227 |
| JS1 |
SKD12 |
Chemical Composition for Steel A2
| Element |
Amount |
| Chromium(Cr) |
4.75-5.50% |
| Molybdenum(Mo) |
0.90-1.40% |
| Manganese (Mn) |
1.00 max% |
| Carbon (C) |
0.95-1.05% |
| Silicon(Si) |
0.50max% |
| Vanadium (V) |
0.15-0.50% |
| Nickel(Ni) |
0.30 max% |
Cutting Speeds Recomendations for Steel A2
| Application |
mm/min |
SFM |
| Turning |
155-210 |
510-690 |
| Milling |
95-130 |
95-130 |
| Parting |
75-100 |
250-330 |
| Grooving |
90-120 |
300-390 |
| Drilling |
65-85 |
210-280 |
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 overhan gof the cutting tool.
- Nominal hardness of the material.
- etc.
Recommended CARBIDE Grades for Steel A2
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Steel 1006
| 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" |
