UNS R58010 CNC Machining: How to Vet a Grade 13 Ti Supplier

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  Key takeaways
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  Grade 13 vs Ti-6Al-4V: what changes for your part
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  Five checks to run on every UNS R58010 CNC machining quote
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  Match the material condition before you talk about UNS R58010 CNC machining
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  Why deflection, not tool wear, drives Grade 13 tolerances
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  Tooling and coolant choices that actually hold up
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  Tolerances, inspection, and what to write on the drawing
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  Lead time, MOQ, and certifications in a China supplier search
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  How to run a Grade 13 RFQ in six steps

Grade 13 is a metastable beta titanium. That single sentence explains most of what you will see on the shop floor. In the solution-treated state it is soft, ductile, and formable. Age it, and hardness climbs fast while ductility drops. The same drawing cut from the same bar can run smoothly at 20 HRC and destroy inserts at 42 HRC.

So the first question to any supplier is not about machines. It is which condition the stock arrives in, and who is responsible for the heat treat. If the part is finish-machined after aging, expect slower speeds, shorter tool life, and a real risk of distortion in thin walls.

If the drawing allows it, machine in the solution-treated state and age afterwards. That path keeps cutting forces low and lets you hold tight tolerances on features that would move during aging. If the final properties require aging before machining, say so on the RFQ and ask for the aging schedule in writing.

One more thing. This grade is rarely available as standard wrought bar. Much of the supply is casting or powder metallurgy, and those forms cut differently. A cast blank has porosity and a skin; a PM blank is more uniform but can chip at the edges. Ask which one the quote assumes.

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  Ask for the conditionSolution treated, aged, or as-cast, stated in writing on the quote.
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  Sequence the heat treatAge after machining when the drawing permits; this protects thin walls.
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  Confirm the stock formWrought, cast, or PM. Each one changes speeds and feeds.

Titanium has a low elastic modulus, and Grade 13 sits near the low end at roughly 103 GPa. Push a cutter through a thin rib and the material moves away from the tool, then springs back. The result is a wall that measures oversize in the middle and on size at the ends. No amount of tool changing fixes that.

The practical answer is support and light passes. Rough with a generous radial engagement but leave enough stock so the finishing pass removes a consistent chip. Then take two or three finishing passes at low radial width, around 5–8 percent of cutter diameter, so the radial force stays small.

Fixturing matters more here than on aluminum. Vacuum plates and low-melt fixturing help on thin sheet. For machined pockets, leave tabs and cut them last. If a shop quotes a 0.5 mm wall with no mention of support or pass strategy, that quote is optimistic.

Chatter is the other symptom. It shows up as a poor surface finish and a ringing sound, and it usually means the tool is too long for the job. Reduce the gauge length, or move to a smaller diameter cutter with a higher spindle speed. Rigidity beats feed rate every time on this alloy.

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  Finishing radial width5–8 percent of cutter diameter keeps radial force low.
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  Leaving stockConsistent 0.3–0.5 mm allowance avoids rubbing on the finish pass.
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  Tool gauge lengthKeep it as short as the geometry allows; long tools chatter.

Grade 13 is softer than Ti-6Al-4V, so uncoated carbide can work for roughing. The problem is heat. Titanium conducts heat poorly, and most of the cutting heat stays in the edge. A sharp, uncoated carbide grade with a positive rake and a polished flute runs cooler than a coated insert that rubs.

For finishing, a PVD-coated carbide or a cermet gives a better edge life on the final passes. Keep surface speed in the 30–60 m/min band for carbide. Higher speeds raise edge temperature quickly and shorten tool life without buying much cycle time.

Coolant is not optional. High-pressure through-tool coolant, ideally 70 bar or more, clears chips from deep pockets and keeps the edge temperature down. Flood coolant works on open profiles but struggles in pockets. On finishing passes, a mist or air blast can be enough if the chip load is light.

Never let a chip sit in the cut. Titanium chips weld to the edge under pressure and take the coating with them. Program a full retract on deep pockets, or use a pecking strategy that clears the flute.

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  RoughingSharp uncoated carbide, positive rake, 30–60 m/min.
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  FinishingPVD-coated carbide or cermet on the last passes.
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  CoolantThrough-tool at 70 bar or more for pockets and deep features.

General tolerances on a titanium drawing are a trap. A blanket ±0.1 mm note looks harmless until the shop applies it to a 0.8 mm rib that deflects under its own cutting force. Call out the features that matter and leave the rest loose. The shop will quote the tight ones properly and stop guessing.

For most Grade 13 work, ±0.005 mm is achievable on critical diameters and bores with the right setup. It is not a default. If every dimension carries that tolerance, the quote will either be high or wrong. Group the tight features, and give the shop a datum scheme that reflects how the part is inspected.

Inspection is where good suppliers separate from the rest. Ask for a first-article report, in-process checks on the tight features, and a final dimensional report. On thin walls, add a note about when the part is measured. Measuring straight off the machine gives a different number than measuring after the part has cooled and relaxed.

If the part is for a regulated industry, say so up front. Aerospace, medical, and automotive programs each carry their own documentation expectations, and those change the inspection plan, not just the paperwork.

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  Tolerance by featureTight on functional features, loose on cosmetic ones.
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  Datum schemeMatch the drawing datums to the inspection setup.
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  Measurement timingState whether the part is measured hot or after relaxation.

When buyers search for a UNS R58010 CNC machining company in China, the first filter is usually price. The more useful filter is how the supplier handles the small, awkward jobs. A shop with no minimum order quantity will run one prototype and give you a real answer on machinability before you commit to a production run.

Lead time should be quoted as a sequence, not a single number. Quotation and DFM feedback within 12 hours, production starting within 24 hours of a released order, and parts shipping in 3–5 days is a workable rhythm for most titanium jobs. Ask what happens if the material is not in stock, because Grade 13 often is not.

Certifications are a floor, not a differentiator. ISO 9001:2015 covers the quality system. IATF 16949:2016 matters for automotive and EV work. ISO 13485:2016 matters for medical devices. Ask to see the certificates and check the scope matches the process you are buying.

Confidentiality is the last item and often the one that stalls a project. If the part is proprietary, ask for an NDA before you send drawings. A supplier that treats that as routine is a supplier that has done it before.

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  MOQNo minimum order quantity covers one prototype up to 10,000+ part runs.
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  Lead timeQuote in 12 hours, production in 24 hours, ship in 3–5 days.
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  CertificatesMatch the certification scope to your industry, not just the logo.