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" |