Ti Grade 3
Commercially pure titanium Grade 3 — highest oxygen (0.35% max) of the CP grades = highest strength (UTS 450-550 MPa). Between Grade 2 (general purpose) and Grade 4 (maximum CP strength). Used for chemical process equipment, marine hardware, and structural components where higher strength than Grade 2 is needed but alloy cost (Ti-6Al-4V) is not justified.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | ASTM Grade 3 / UNS R50550 | R50550 | REF |
Sources: ASTM B265
Chemical composition comparison (wt%)
Side-by-side: Ti Grade 3 (ASTM B265) vs ASTM (ASTM B265)
| Element | Ti Grade 3 (ASTM B265) | ASTM | Overlap |
|---|---|---|---|
| C | — | 0–0.08% | — |
| Ti | — | — | — |
Mechanical properties
Related materials
Ti-6Al-4V (Grade 5)
3.7164The most widely used titanium alloy — accounts for ~50% of all titanium production. Alpha-beta alloy with exceptional strength-to-weight ratio. Used for jet engine components, airframe structures, medical implants (hip/knee), fasteners, and racing components. Biocompatible.
Titanium Grade 2 (CP)
3.7035The workhorse commercially pure titanium grade. Best balance of strength, ductility, and corrosion resistance among CP grades. Excellent resistance to seawater, chlorides, and oxidizing acids. Used for heat exchangers, chemical processing, marine hardware, desalination, and medical implants.
Titanium Grade 1
3.7025The softest and most ductile commercially pure titanium grade. Lowest O content (0.18% max) for maximum formability. Used for plate heat exchangers, chemical plant vessels, explosive cladding, deep-drawn parts, and anodizing applications. Lower strength than Grade 2 but superior formability.
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