VT machining offers CNC Milling 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 Milling Notes for 12L14 Steel
12L14 Steel mills well with conventional strategies; finishing passes are planned to meet flatness and finish callouts.
For estimating, a 100 × 100 × 10 mm block of 12L14 Steel weighs about 0.79 kg.
Starting Parameters for CNC Milling 12L14 Steel
| Cutting speed (carbide) | 270-475 m/min |
|---|---|
| Feed per tooth | 0.035-0.123 mm |
| Spindle speed, Ø10 mm end mill | 8590-15120 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion (5-8%); dry is possible for interrupted cuts |
| Thermal growth, 100 mm part, +10 °C | 11.7 µm (CTE 11.7 µm/m·K) |
Starting values for 12L14 Steel, Cold-drawn; optimised on the first article.
12L14 Steel Data Relevant to CNC Milling
| 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 Milling Steel
Finishing options, quality documentation and general cnc milling guidance for all steel grades are on our CNC Milling Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Milling 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
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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 is CNC Milling 12L14 Steel and how is it done?
CNC Milling 12L14 Steel refers to multi-axis milling cutters remove material to produce prismatic features, pockets, slots and contoured 3D surfaces. Applied to 12L14 Steel — strong, economical and widely available — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Does CNC Milling 12L14 Steel require dedicated tooling?
Most 12L14 Steel machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
Can VT machining make custom 12L14 Steel parts to my drawing?
Yes. 12L14 Steel machining 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.
Which industries use CNC Milling 12L14 Steel parts?
CNC Milling 12L14 Steel parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise 12L14 Steel components are required.
Why is 12L14 Steel a good choice for CNC Milling?
12L14 Steel is strong, economical and widely available, which makes it well suited to CNC Milling. We tune the process to the alloy so the finished 12L14 Steel machining part meets your dimensional and functional requirements.
What tolerances can you hold for CNC Milling 12L14 Steel?
Achievable tolerances for 12L14 Steel machining depend on the alloy, geometry and feature size. Milling holds positional and dimensional tolerances to around ±0.01 mm, tighter with precision setups. Exact figures are confirmed against your drawing callouts.