VT machining offers CNC Precision Machining for Alloy 42 (UNS K94100 / ASTM F30 / 4J42), typically supplied annealed. Lower-cost Fe-Ni with expansion close to silicon and ceramics.
CNC Precision Machining Notes for Alloy 42
Alloy 42 mills well with conventional strategies; finishing passes are planned to meet flatness and finish callouts.
For estimating, a 100 × 100 × 10 mm block of Alloy 42 weighs about 0.81 kg.
Starting Parameters for CNC Precision Machining Alloy 42
| Cutting speed (carbide) | 30-65 m/min |
|---|---|
| Feed per tooth | 0.021-0.063 mm |
| Spindle speed, Ø6 mm end mill | 1590-3450 rpm |
| Insert / tool class | ISO S — sharp PVD-coated carbide |
| Coolant | Flood emulsion; sulphurised oil for tapping |
| Thermal growth, 100 mm part, +5 °C | 2.3 µm (CTE 4.5 µm/m·K) |
| Tightest practical tolerance | ±0.002-0.005 mm |
Starting values for Alloy 42, Annealed; optimised on the first article.
Full material data for Alloy 42 (UNS K94100 / ASTM F30 / 4J42) is on the CNC Milling Alloy 42 page.
More on CNC Precision Machining Kovar
Finishing options, quality documentation and general cnc precision machining guidance for all kovar grades are on our CNC Precision Machining Kovar page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Precision Machining Alloy 42
Send a STEP/IGES model or PDF drawing, confirm Alloy 42 and its condition (we usually see it supplied annealed), the quantity, critical tolerances and any finish or certificate requirements.
Alloy 42 in Other Processes
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Send the drawing, the Alloy 42 condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What tolerances can you hold for CNC Precision Machining Alloy 42?
Achievable tolerances for Alloy 42 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 Precision Machining Alloy 42 require dedicated tooling?
Most Alloy 42 machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
Which industries use CNC Precision Machining Alloy 42 parts?
CNC Precision Machining Alloy 42 parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Alloy 42 components are required.
What is the typical lead time and minimum order for CNC Precision Machining Alloy 42?
CNC Precision Machining prototypes for Alloy 42 can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.