Machined components in commercially pure Grade 4 titanium for seawater, chloride and oxidizing chemical service. We hold ±0.005 mm and inspect every part before it ships.
All four cost money. Three of them can be caught before the first chip is cut.
Commercially pure titanium conducts heat poorly, so it stays in the tool edge and the part. Tools dull fast, the surface tears, and a bore that measured on size at 9 a.m. reads undersize after it cools. We cut at low surface speed, flood the zone and let the part settle before the final pass.
The pure grades are softer than Ti-6Al-4V and deflect more under the same side load. A 2 mm wall on a 150 mm flange will ring if you take a heavy radial cut. Light passes, sharp edges and a supporting fixture hold the wall quiet.
Titanium rubs and welds to tooling under pressure. A tap run dry will seize and snap in a deep hole. Thread milling with cutting oil and a relieved tool solves most of it, and we check threads with go/no-go gauges.
Two heats of R50700 can look identical on the bench and differ in oxygen content and yield strength. If the mill certificate and the part cannot be tied together, a chemical plant audit becomes a problem. We keep heat numbers on the traveler.
Tooling, coolant and inspection planned around one material, not a general shop schedule.
Commercially pure titanium work-hardens at the surface, so a dull edge rubs instead of cutting. We rough with uncoated carbide at reduced surface speed and keep the radial depth light, then take a separate finishing pass with a fresh tool. Chips come off as short, thick curls instead of fine dust.
The finishing pass matters most on sealing faces and O-ring grooves. Cutting fluid reaches the edge, the part stays near room temperature, and we measure critical bores after the part has cooled rather than at the spindle.
Marine and chemical parts rarely sit still in one orientation. A pump housing with angled ports, a flange with a bolt circle on a curved face, or a manifold with several intersecting bores usually needs more than one setup on a three-axis machine. Every re-clamp adds a position error you cannot inspect away.
We cut those features in one setup on simultaneous 5-axis centers with a Ø400 mm rotary table. Datum surfaces are machined first, then used for the rest of the part. That keeps bore-to-bore relationships inside the tolerance band instead of at the edge of it.
Pick the grade by service environment, not by habit.
| Material | Best for | Watch out for |
|---|---|---|
| Titanium Grade 4 (UNS R50700) | Seawater, chlorides, oxidizing acids | Not for reducing acids or high-strength fasteners |
| Titanium Grade 2 (UNS R50400) | Same chemistry, lower strength demand | Lower yield strength than Grade 4 |
| Ti-6Al-4V (Grade 5) | Strength-critical brackets and shafts | Harder to form, less weldable, higher cost |
| 316L stainless | Mild chloride service, tight budget | Pitting above roughly 60 °C in seawater |
| Duplex 2205 | High-chloride piping, higher strength | Not immune to crevice corrosion in hot brine |
One shop for the turning, milling, finishing and inspection a part needs.
Compound-angle ports, curved flanges and one-setup work on complex housings. Sixteen simultaneous 5-axis centers available.
Mill-turn centers for parts that need turning and cross-features without a second fixture.
Cost-effective routing for prismatic plates, covers and simple housings in larger runs.
One-off Grade 4 prototypes to prove a seal face or a port angle before tooling.
Bead blasting, tumbling, brushing and polishing to the finish your drawing calls out.
Raw material check, in-process monitoring and final inspection, with reports on request.
Numbers from our own machines and inspection process.
| Item | Capability |
|---|---|
| General tolerance | ±0.005 mm (±0.0002 in) |
| Fine surface finish | Ra 0.2–0.8 μm |
| Standard machined finish | Ra 1.6–3.2 μm |
| Maximum processing size | 4,000 mm |
| Large travel | 4,000 × 400 × 150 mm |
| Rotary table | Ø400 mm |
| Minimum order | No MOQ, one part to 10,000+ |
| Quotation | Within 12 hours, with DFM analysis |
Capacity, tolerances and paperwork that hold up in an audit.
Three wholly-owned plants and 150 technicians in Dongguan, plus a factory in Singapore.
Sixteen simultaneous 5-axis centers, sixteen mill-turn centers, plus four-axis and three-axis capacity.
General tolerance held at ±0.005 mm, with finer finishes available on request.
Raw material check, in-process monitoring and 100% inspection before shipment.
Quotation and free DFM analysis within 12 hours, production can start in 24 hours.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022.
Pump housings, valve bodies and heat exchanger plates that sit in seawater for years.
Manifolds, nozzles and flanges for oxidizing and chloride-bearing process lines.
Bores and seal faces that must stay round after cooling, not just at the spindle.
Small Grade 4 housings and sensor bodies where finish drives the function.
They are the same material. Grade 4 is the ASTM designation and UNS R50700 is the unified numbering system identifier used on drawings and mill certificates.
When you send a drawing, put both on it. That removes any chance of the shop quoting Grade 2 by mistake.
Skip it for reducing acids such as hydrochloric or sulfuric in strength, where the oxide layer does not rebuild. Also skip it where you need high strength in a small section.
For those cases, look at Ti-6Al-4V for strength, or a nickel alloy for reducing-acid service.
Yes, as a general tolerance on features we can reach with a rigid setup. Deep bores and thin walls need a separate tolerance discussion because the material moves after cutting.
We measure critical features after the part has cooled. That is the number that matters.
We thread mill rather than tap wherever the geometry allows, use cutting oil rather than water-based coolant, and keep the tool relieved.
Threads are checked with go/no-go gauges before the part leaves the machine.
As-machined surfaces land in the Ra 1.6–3.2 μm range. With a dedicated finishing pass we hold Ra 0.8–1.6 μm, and down to Ra 0.2–0.8 μm where a sealing face requires it.
Tell us the finish on the drawing. A blanket fine finish across the whole part adds cost for no benefit.
Yes. We keep the heat number tied to the part traveler so the mill certificate can be matched to the delivered components.
Inspection reports are available on request, covering raw material check, in-process monitoring and final inspection.
None. We run from a single prototype to 10,000+ part runs on the same process.
Prototype parts are a useful way to prove a port angle or a seal face before you commit to a production batch.
Yes. Production can start within 24 hours of an approved order, and parts typically ship in 3–5 days.
Uploads stay confidential, and we sign an NDA on request before you send drawings.
Quotation and free DFM analysis within 12 hours. One part or ten thousand, same process.
12-hour quote100% inspectionNo MOQNDA on request
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Upload your 3D model or 2D drawing and get a quotation with a free DFM analysis. Maximum processing size 4,000 mm.
CNC Metals 13 grades
CNC Plastics 10 grades
Machines & processes 12 options
Surface & post-processing 10 options
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