Ti-6Al-4V (Grade 5) is the same material your supplier may list as UNS R56400. This page maps the designations across standards and gives the ISO S-group machining starting point, brand-neutral.
| System | Designation |
|---|---|
| EN (EU) | Ti-6Al-4V (Grade 5) |
| Werkstoffnummer | 3.7164 / 3.7165 |
| AISI / ASTM / UNS (US) | UNS R56400 |
| JIS (Japan) | — |
Compiled from the public standard designation systems (EN 10027, SAE/AISI, ASTM, UNS, JIS). Entries marked “nearest” are the closest commonly-cited counterpart, not a drop-in equivalent. Always verify against the material certificate.
The titanium: nearly all the heat goes into the tool, so Vc 30-70 is not caution, it is physics. Sharp S-grade PVD inserts, high-pressure coolant if you have it, rigid everything.
| ISO group | Starting Vc (coated carbide, turning) | Feed fn |
|---|---|---|
| S S · Titanium | 30–70 m/min · 100–230 sfm | 0.1–0.25 mm/rev · .004–.010 ipr |
Group-level starting range from our speeds & feeds guide; convert to RPM with the speeds & feeds calculator. Condition, subgroup and operation shift the number — the material page has the detail: ISO S · Titanium alloy.
Related materials: Titanium Grade 9 / 3.7195
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Ti-6Al-4V (Grade 5) (Werkstoffnummer 3.7164 / 3.7165) corresponds to UNS R56400.
It is an ISO S-group material, so the starting window is 30–70 m/min · 100–230 sfm at 0.1–0.25 mm/rev · .004–.010 ipr for coated-carbide turning, adjusted for condition and operation. For a grounded, brand-neutral pick — grade, geometry and cutting data across 15 brands — ask the advisor.
They designate the same composition under different systems, but the drawing standard governs: certificates, tolerances and delivery-condition requirements differ between standards even for equivalent chemistry. Substitute only with the certificate in hand.
Knowing the material is half the job; picking the grade and cutting data for the operation is the other half. That is what the advisor does, grounded in catalog data and honest when there is no verified match.