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.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | R56400 | R56400 | REF |
| 🇺🇸 | ASTM | USA | Grade 5 / UNS R56400 | R56400 | REF |
| 🇺🇸 | AMS | USA | AMS 4911 | — | 100% |
| 🇪🇺 | EN | Europe | TiAl6V4 | 3.7164 | 100% |
| 🇯🇵 | JIS | Japan | TAB6400 | — | 98% |
| 🇩🇪 | DIN | Germany | TiAl6V4 | 3.7165 | 95% |
| 🇷🇺 | GOST | Russia | VT6 | — | 93% |
Sources: ASTM B348, ASTM B265, AMS 4911, EN 3468, JIS H4600, DIN 17851, GOST 19807
Mechanical properties — Pro
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Hardness HRC | ||
| Elastic Modulus | ||
| Density |
STA
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength |
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength Rp0.2 | ||
| Elongation A |
STA
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength Rp0.2 |
General
| Property | Value | Unit |
|---|---|---|
| Density | ||
| Elastic Modulus | ||
| Beta Transus |
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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.
Titanium Grade 4
3.7065The strongest commercially pure titanium grade. Highest oxygen content (0.40% max) for maximum strength among CP grades. UTS min 550 MPa — approaches some Ti alloys. Used for airframe skins, marine hardware, surgical implants, and chemical plant components requiring higher strength than Grade 2.
Ti Grade 9 / Ti-3Al-2.5V
3.7195Medium-strength alpha-beta titanium alloy — the standard for seamless tubing. 50% stronger than CP Grade 2 with better cold formability than Ti-6Al-4V. The go-to alloy for hydraulic tubing in aerospace and bicycle frames. Used for aircraft hydraulic lines, offshore risers, and sporting goods.
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