General Information for Steel O1
| Material Group |
P - Steel |
| Sub-Group |
Tool Steel |
| Tensile Strength |
640-670[N/mm^2] |
| Machinability Range |
42% |
MACHINABILITY OF O1 STEEL
Steel O1 is a tool steel (high-alloy steel) that has on top of the 0.9% of carbon an additional 2.3% of manganese, chromium, nickel, tungsten (See details in the table below). Steel O1 has a machinability rating of 42%.
Steel O1 belongs to the "O series" of tool steels. They are classified as oil-hardening cold-work steel and contain high carbon content (around 1%). Tool steels in this series (O1-O7) 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 O1, a 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 O1
| Standard |
Name |
| SAE |
O1 |
| WNR |
1.2510 |
| DIN |
100MnCrW4 |
Chemical Composition for Steel O1
| Element |
Amount |
| Manganese (Mn) |
1.00-1.40% |
| Carbon (C) |
0.85-1.00% |
| Silicon (Si) |
0.50% |
| Chromium (Cr) |
0.40-0.60% |
| Tungsten (W) |
0.40-0.60% |
| Nickel (Ni) |
0.30% |
| Vanadium (V) |
0.30% |
| Copper (Cu) |
0.25% |
| Phosphorus (P) |
0.03% |
| Sulfur (S) |
0.03% |
Cutting Speeds Recomendations for Steel O1
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
155-210 |
510-690 |
| Milling |
95-130 |
310-430/td> |
| 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 overhang of the cutting tool.
- Nominal hardness of the material.
- etc.
Recommended Carbide Grades for Steel O1
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Steel O1
| 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" |
