Ti Grade 2 is the same material your supplier may list as UNS R50400 or JIS TP340. This page maps the designations across standards and gives the ISO S-group machining starting point, brand-neutral.
| System | Designation |
|---|---|
| EN (EU) | Ti Grade 2 |
| Werkstoffnummer | 3.7035 |
| AISI / ASTM / UNS (US) | UNS R50400 (ASTM B348 Gr. 2) |
| JIS (Japan) | TP340 (nearest) |
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.
Softer than Ti-6Al-4V but every titanium rule already applies: low speed, constant feed, copious coolant, never let the tool dwell or rub.
| 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 (commercially pure).
Ti Grade 2 (Werkstoffnummer 3.7035) corresponds to UNS R50400 (ASTM B348 Gr. 2). In JIS terms the counterpart is TP340 (nearest).
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 13 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.