Grade 9 vs Grade 5 titanium

Ti-3Al-2.5V · Ti-6Al-4V

Grade 9 (Ti-3Al-2.5V) has less aluminum and vanadium than Grade 5 (Ti-6Al-4V): 2.5–3.5% aluminum and 2.0–3.0% vanadium, against 5.50–6.75% and 3.50–4.50%. Annealed, its minimum tensile strength is 620 MPa (90 ksi) against 895 MPa (130 ksi) for Grade 5.

Mechanical properties

Specified minimums for annealed material at room temperature.

Grade 9 vs Grade 5: mechanical properties (specified minimums)
Property	Grade 9	Grade 5	Difference
Tensile strength (min)	620 MPa (90 ksi)	895 MPa (130 ksi)	−275 MPa (40 ksi) for Grade 9
Yield strength (0.2%, min)	483 MPa (70 ksi)	828 MPa (120 ksi)	−345 MPa (50 ksi) for Grade 9
Elongation (min)	15%	10%	+5 points for Grade 9

Chemical composition

Maximum weight percent unless shown as a range. A dash means the element is not listed on its own for that grade.

Grade 9 vs Grade 5: chemical composition limits (wt %)
Element	Grade 9	Grade 5
Aluminum (Al)	2.5–3.5	5.50–6.75
Vanadium (V)	2.0–3.0	3.50–4.50
Iron (Fe)	0.25	0.40
Oxygen (O)	0.15	0.20
Carbon (C)	0.08	0.08
Nitrogen (N)	0.03	0.05
Hydrogen (H)	0.015	0.015
Other elements	0.1 each / 0.4 total	0.1 each / 0.4 total
Titanium (Ti)	Balance	Balance

Density and weight

Typical density: Grade 9 4.48 g/cm³, Grade 5 4.43 g/cm³. A piece of Grade 9 weighs about 1.1% more than the same piece in Grade 5. Estimate a piece with the titanium weight calculator.

Standards and forms

Grade 9	ASTM B348 (bar), ASTM B338 (tube). Supplied by Laube as bar, tube.
Grade 5	ASTM B348 (bar), ASTM B265 (sheet/plate). Supplied by Laube as bar, sheet, plate.
Both grades	bar

Sources and notes

Values checked against ASTM B348-19 (bar), ASTM B265-11 (sheet and plate) and ASTM B338-10e1 (tube).
Minimum properties per ASTM B348 apply to bar up to 3 in (76 mm); larger sections are by agreement.
Minimum properties per ASTM B265 apply to plate up to 1 in (25 mm) thick; thicker plate is by agreement.
Density is a typical value, not a specification requirement.

Reviewed by Laube, September 2026