VT machining offers CNC Turning for Incoloy 825 (UNS N08825 / 2.4858), typically supplied annealed. Mo and Cu added for sulfuric and phosphoric acid resistance.
CNC Turning Notes for Incoloy 825
On the lathe Incoloy 825 needs chip-breaker inserts and constant chip load to avoid long, stringy swarf.
For estimating, a 100 × 100 × 10 mm block of Incoloy 825 weighs about 0.81 kg.
Starting Parameters for CNC Turning Incoloy 825
| Cutting speed (carbide) | 30-80 m/min |
|---|---|
| Feed | 0.05-0.15 mm/rev |
| Spindle speed, Ø25 mm bar | 380-1020 rpm |
| Insert / tool class | ISO S — sharp PVD-coated carbide |
| Coolant | High-pressure emulsion; ceramic inserts run dry for roughing |
Starting values for Incoloy 825, Annealed; optimised on the first article.
Incoloy 825 Data Relevant to CNC Turning
| Equivalent designations | UNS N08825 / 2.4858 |
|---|---|
| Key composition | Ni 38-46%, Cr 19.5-23.5%, Mo 2.5-3.5%, Cu |
| Typical supply condition | Annealed |
| Hardness (typical) | ~75-90 HRB |
| Machinability rating | 20% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How Incoloy 825 Differs
Mo and Cu added for sulfuric and phosphoric acid resistance.
Typical applications: Oil & gas, acid production, pickling.
Incoloy 825 vs Similar Grades
| Incoloy 825 | Incoloy 800 | Hastelloy C22 | Inconel 718 | |
|---|---|---|---|---|
| Key composition | Ni 38-46%, Cr 19.5-23.5%, Mo 2.5-3.5%, Cu | Ni 30-35%, Cr 19-23%, Fe bal. | Ni bal., Cr 20-22.5%, Mo 12.5-14.5%, W 2.5-3.5% | Ni 50-55%, Cr 17-21%, Nb 4.75-5.5%, Mo |
| Hardness | ~75-90 HRB | ~75-85 HRB | ~90 HRB | Up to ~40-45 HRC aged |
| Tensile (MPa) | ~690 | ~600 | ~790 | ~1240-1400 aged |
| Machinability % | 20 | 20 | 10 | 10 |
| Typical use | Oil & gas, acid production, pickling | Heat exchangers, furnace parts | Chemical reactors, flue-gas scrubbers | Turbine discs, fasteners, oil & gas tools |
More on CNC Turning Inconel
Finishing options, quality documentation and general cnc turning guidance for all inconel grades are on our CNC Turning Inconel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Turning Incoloy 825
Send a STEP/IGES model or PDF drawing, confirm Incoloy 825 and its condition (we usually see it supplied annealed), the quantity, critical tolerances and any finish or certificate requirements.
Incoloy 825 in Other Processes
Related
Send the drawing, the Incoloy 825 condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What is CNC Turning Incoloy 825 and how is it done?
CNC Turning Incoloy 825 refers to cNC turning rotates the workpiece against a single-point tool to produce cylindrical features, threads and grooves. Applied to Incoloy 825 — high-temperature strength and oxidation resistance — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
What is the typical lead time and minimum order for CNC Turning Incoloy 825?
CNC Turning prototypes for Incoloy 825 can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.
Which industries use CNC Turning Incoloy 825 parts?
CNC Turning Incoloy 825 parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Incoloy 825 components are required.
Why is Incoloy 825 a good choice for CNC Turning?
Incoloy 825 is high-temperature strength and oxidation resistance, which makes it well suited to CNC Turning. We tune the process to the alloy so the finished Incoloy 825 turning part meets your dimensional and functional requirements.
Does CNC Turning Incoloy 825 require dedicated tooling?
Most Incoloy 825 turning work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What surface finish is achievable on Incoloy 825 with CNC Turning?
Surface finish on Incoloy 825 is controlled to your specification; we confirm the achievable Ra against your callout.