VT machining offers CNC Turning for 12L14 Steel (UNS G12144 / 11SMnPb30), typically supplied cold-drawn. Leaded free-machining steel; one of the most machinable steels, but not for welding or RoHS-restricted parts.
CNC Turning Notes for 12L14 Steel
12L14 Steel turns with good chip control at standard cutting data.
For estimating, a 100 × 100 × 10 mm block of 12L14 Steel weighs about 0.79 kg.
Starting Parameters for CNC Turning 12L14 Steel
| Cutting speed (carbide) | 320-560 m/min |
|---|---|
| Feed | 0.1-0.35 mm/rev |
| Spindle speed, Ø25 mm bar | 4070-7130 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion (5-8%); dry is possible for interrupted cuts |
Starting values for 12L14 Steel, Cold-drawn; optimised on the first article.
12L14 Steel Data Relevant to CNC Turning
| Equivalent designations | UNS G12144 / 11SMnPb30 |
|---|---|
| Key composition | C ≤0.15%, S 0.26-0.35%, Pb 0.15-0.35% |
| Typical supply condition | Cold-drawn |
| Hardness (typical) | ~80 HRB |
| Machinability rating | 160% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How 12L14 Steel Differs
Leaded free-machining steel; one of the most machinable steels, but not for welding or RoHS-restricted parts.
Typical applications: High-volume turned parts, hydraulic fittings.
12L14 Steel vs Similar Grades
| 12L14 Steel | 1215 Steel | S235JR Steel | 1144 Steel | |
|---|---|---|---|---|
| Key composition | C ≤0.15%, S 0.26-0.35%, Pb 0.15-0.35% | C ≤0.09%, S 0.26-0.35%, P | C ≤0.17-0.20%, Mn ≤1.4% | C 0.40-0.48%, Mn 1.35-1.65%, S 0.24-0.33% |
| Hardness | ~80 HRB | ~80 HRB | ~120 HB | ~25-30 HRC |
| Tensile (MPa) | ~540 | ~540 | 360-510 | ~700-800 |
| Machinability % | 160 | 136 | 70 | 76 |
| Typical use | High-volume turned parts, hydraulic fittings | Screw-machine parts, fittings, couplings | Frames, brackets, weldments | Shafts, hydraulic rods, studs |
More on CNC Turning Steel
Finishing options, quality documentation and general cnc turning guidance for all steel grades are on our CNC Turning Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Turning 12L14 Steel
Send a STEP/IGES model or PDF drawing, confirm 12L14 Steel and its condition (we usually see it supplied cold-drawn), the quantity, critical tolerances and any finish or certificate requirements.
12L14 Steel in Other Processes
Related
Send the drawing, the 12L14 Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What material thickness or size range suits CNC Turning 12L14 Steel?
Turned 12L14 Steel parts are produced from bar or chuck stock across a wide diameter range.
What surface finish is achievable on 12L14 Steel with CNC Turning?
Surface finish on 12L14 Steel is controlled to your specification; we confirm the achievable Ra against your callout.
Can VT machining make custom 12L14 Steel parts to my drawing?
Yes. 12L14 Steel turning is made to order from your CAD/2D drawing. Share your geometry, material grade, tolerance and quantity and we will confirm feasibility, lead time and pricing.
Does CNC Turning 12L14 Steel require dedicated tooling?
Most 12L14 Steel turning work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.