General Information for Steel 4137
| Material Group |
P-Steel |
| Sub-Grou |
Low Alloy Steel |
| Tensile Strengt |
750-1100[N/mm^2] |
| Machinability |
74% |
MACHINABILITY OF 4137 STEEL
Steel 4137 is a low-alloy steel with a carbon content of 0.4% and additional 2% content of manganese, chromium, and molybdenum. (See details in the table below). Steel 4137 has a machinability rating of 74%.
Low alloy steels are very popular in machine shops. The small amount of alloying elements enhances their mechanical properties and hardenability without a significant sacrifice in terms of machinability.
SUMMARY:
For general turning of Steel 4137 at stable conditions use a grade with a hard substrate and CVD coating.
In case you are running at a cutting speed that is lower than 490 SFM (150 m/min), it is better to use a grade with a Hard substrate and PVD coating.
For general milling use a grade with a semi hard substrate and Thin PVD coating.
For detailed carbide grades recommendations,check the table below.
Recommended Cutting speed range for turning at stable conditions is 900 - 1230 [SFM] / 275 - 375 [m/min].
Recommended Cutting speed range for milling with stable clamping and short over hang is 560 - 750 [SFM] / 170 - 230 [m/min]
For detailed cutting speed recommendations,check the table below.
Equivalent International Designations for Steel 4137
| Standard |
Name |
| SAE |
4137 |
| WNR |
1.7220 |
| DIN |
34CrMo4 |
| BS |
708A37 |
| SS |
2234 |
| ANFOR |
35CD4 |
| UNI |
35CrMo4 |
| UNF |
34CrMo4 |
| JS1 |
SCM432;SCCRM3 |
Chemical Composition for Steel 4137
| Element |
Amount |
| Chromium(Cr)) |
.80-1.10% |
| Manganese(Mn) |
.70-.90% |
| Carbon(C) |
.35-.40% |
| Molybdenum(Mo) |
.15-.25% |
Cutting Speeds Recomendations for Steel 4137
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
275-375 |
900-1230 |
| Milling |
170-230 |
560-750 |
| Parting |
130-180 |
430-590 |
| Grooving |
155-210 |
510-690 |
| Drilling |
110-150 |
360-490 |
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 4137
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Steel 4137
| 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" |
