General Information for Steel 9840
| Material Group |
P - Steel |
| Sub-Grou |
Low Carbon Steel |
| Tensile Strengt |
800-1100[N/mm^2] |
| Machinability |
70%-84% |
Equivalent International Designations for Steel 9840
| Standard |
Name |
| SAE |
9840 |
| WNR |
1.6511 |
| DIN |
36CrNiMo4 |
| BS |
816M40 |
| ANFOR |
40NCD3 |
| UNI |
38NiCrMo4(KB) |
| UNF |
35NiCrMo4 |
Chemical Composition for Steel 9840
Sorry, Not Availble for this Material
Cutting Speeds Recomendations for Low Alloyed Steel (Alloying elements less then 8%)
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
305-370 |
1000-1210 |
| Milling |
190-230 |
620-750 |
| Parting |
145-175 |
480-570 |
| Grooving |
170-205 |
560-670 |
| Drilling |
125-145 |
410-480 |
Important! The speed estimation is given for an ideal situation:
- Most suitable carbide grade
- Stable tool clamping
- Stableworkpiece clamping
- Goodqualityraw material
- Ashort overhangof the cutting tool.
- Nominalhardnessof the material.
- etc.
Recommended Carbide Grades for Steel 9840
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Steel 9840
| Honing Siz |
0.05-0.08 mm / 0.002-0.003" |
| Rake Angl |
11° -13° |
| Land Angl |
Positive |
| Land Widt |
0.20-0.30 mm / 0.008-0.012" |
