VT machining offers CNC Milling for 1144 Steel (UNS G11440 / Stressproof-type), typically supplied cold-drawn, stress-relieved. High-strength free-machining steel with low distortion after machining.
CNC Milling Notes for 1144 Steel
1144 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 1144 Steel weighs about 0.79 kg.
Starting Parameters for CNC Milling 1144 Steel
| Cutting speed (carbide) | 150-260 m/min |
|---|---|
| Feed per tooth | 0.035-0.123 mm |
| Spindle speed, Ø10 mm end mill | 4770-8280 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 1144 Steel, Cold-drawn, stress-relieved; optimised on the first article.
1144 Steel Data Relevant to CNC Milling
| Equivalent designations | UNS G11440 / Stressproof-type |
|---|---|
| Key composition | C 0.40-0.48%, Mn 1.35-1.65%, S 0.24-0.33% |
| Typical supply condition | Cold-drawn, stress-relieved |
| Hardness (typical) | ~25-30 HRC |
| Machinability rating | 76% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How 1144 Steel Differs
High-strength free-machining steel with low distortion after machining.
Typical applications: Shafts, hydraulic rods, studs.
1144 Steel vs Similar Grades
| 1144 Steel | 1117 Steel | 1215 Steel | 1095 Steel | |
|---|---|---|---|---|
| Key composition | C 0.40-0.48%, Mn 1.35-1.65%, S 0.24-0.33% | C 0.14-0.20%, S 0.08-0.13% | C ≤0.09%, S 0.26-0.35%, P | C 0.90-1.03% |
| Hardness | ~25-30 HRC | ~80 HRB | ~80 HRB | ~190 HB annealed; up to ~60 HRC hardened |
| Tensile (MPa) | ~700-800 | ~470 | ~540 | ~680 annealed |
| Machinability % | 76 | 91 | 136 | 42 |
| Typical use | Shafts, hydraulic rods, studs | Case-hardened pins, shafts, studs | Screw-machine parts, fittings, couplings | Knives, springs, cutting tools |
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 1144 Steel
Send a STEP/IGES model or PDF drawing, confirm 1144 Steel and its condition (we usually see it supplied cold-drawn, stress-relieved), the quantity, critical tolerances and any finish or certificate requirements.
1144 Steel in Other Processes
Related
Send the drawing, the 1144 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 1144 Steel and how is it done?
CNC Milling 1144 Steel refers to multi-axis milling cutters remove material to produce prismatic features, pockets, slots and contoured 3D surfaces. Applied to 1144 Steel — strong, economical and widely available — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
What surface finish is achievable on 1144 Steel with CNC Milling?
Surface finish on 1144 Steel is controlled to your specification; we confirm the achievable Ra against your callout.
What tolerances can you hold for CNC Milling 1144 Steel?
Achievable tolerances for 1144 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.
Does CNC Milling 1144 Steel require dedicated tooling?
Most 1144 Steel machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What is the typical lead time and minimum order for CNC Milling 1144 Steel?
CNC Milling prototypes for 1144 Steel can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.