General Information for Steel 12L14
| Material Group |
P-Steel |
| Sub-Grou |
Free-Cutting Steel |
| Tensile Strengt |
430-740[N/mm^2] |
| Machinability |
170% |
MACHINABILITY OF 12L14 STEEL
Steel 12L14 is a free-cutting steel, which is a nickname for carbon steel materials with an increased amount of alloying elements for the sole purpose of improving their machinability. These elements are usually sulfur and/or lead.
Steel 12L14 contains 0.3% of lead and 0.3% of sulfur. This small addition of elements increases its machinability rating up to 170%
SUMMARY:
For general turning of Steel 12L14 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 2080 - 2800 [SFM] / 635 - 855 [m/min].
Recommended cutting speed range for milling with stable clamping and short overhang is 1300 - 1740 [SFM] / 395 - 530 [m/min].
For detailed cutting speed recomendations,check the table below.
Equivalent International Designations for Steel 12L14
| Standard |
Name |
| SAE |
12L14 |
| WNR |
1.0737 |
| DIN |
9SMnPb36 |
| SS |
1926 |
| ANFOR |
S300Pb |
| UNI |
CF9SMnPb36 |
| UNF |
12SMnP35 |
Chemical Composition for Steel 12L14
| Element |
Amount |
| Manganese (Mn) |
0.85-1.15% |
| Sulfur(S) |
0.26-0.35% |
| Lead(Pb) |
0.15-0.35% |
| Carbon(c) |
0.15% |
Cutting Speeds Recomendations for Steel 12L14
| Application |
Vc (m/min) |
Vc (SFM) |
| Turning |
635-855 |
2080-2800 |
| Milling |
395-530 |
1300-1740 |
| Parting |
305-410 |
1000-1340 |
| Grooving |
355-480 |
1160-1570 |
| Drilling |
255-345 |
840-1130 |
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 12l14
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Steel 12l14
| 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" |
