General Information for Steel P20+S
Material Group |
P - Steel |
Sub-Group |
Tool Steel |
Tensile Strength |
790 [N/mm^2] |
Machinability Range |
23% - 55% |
Equivalent International Designations for Steel P20+S
Standard |
Name |
SAE |
P20+S |
WNR |
1.2312 |
DIN |
40CrMnMoS86 |
BS |
P20+S |
ANFOR |
40CMD8+S |
Chemical Composition for Steel P20+S
Element |
Percentage (%) |
Carbon (C) |
0.35 - 0.45 |
Silicon (Si) |
0.30 - 0.50 |
Manganese (Mn) |
1.40 - 1.60 |
Phosphorus (P) |
0.030 Max |
Sulfur (S) |
0.05 - 0.10 |
Chromium (Cr) |
1.80 - 2.00 |
Molybdenum (Mo) |
0.15 - 0.25 |
Cutting Speeds Recommendations for Tool Steel and High Alloy Steel
Application |
mm/min |
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 |
Cutting Speed Recommendations: Important Considerations
The recommended cutting speeds provided are based on ideal machining conditions. Achieving optimal results in real-world scenarios requires careful consideration of various factors that can influence cutting performance. These factors include:
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Tool Clamping: Ensuring a stable and secure tool clamping system is essential to prevent vibrations and maintain consistent cutting conditions.
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Workpiece Clamping: Proper workpiece clamping is crucial to avoid movement and ensure dimensional accuracy.
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Raw Material Quality: The quality and consistency of the raw material being machined can significantly impact cutting performance and tool life.
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Tool Overhang: A shorter tool overhang minimizes deflection and vibration, leading to improved cutting stability and surface finish.
-
Material Hardness: The hardness of the material being machined directly affects cutting forces and tool wear. Ensure the material's hardness is within the nominal range for optimal results.
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Other Factors: Additional factors such as coolant selection, tool geometry, and machine rigidity can also influence cutting performance and should be considered for optimal results.
By taking these factors into account and adjusting cutting speeds accordingly, machinists can maximize productivity, tool life, and overall machining success.
Disclaimer: The recommended cutting speeds are provided as a starting point. Always consult with tooling experts and refer to manufacturer recommendations for fine-tuning cutting parameters based on specific machining setups and requirements.
Grades of CARBIDE that are recommended for Steel P20+S
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" |