ASTM B265· United States

Ti-6Al-4V (Grade 5)

The most used titanium alloy: annealed Rm 895 MPa, Rp0.2 828 MPa at 4.4 g/cm³ — steel-like strength at 56 % of its weight.

Alpha-beta alloy for aircraft structures, engine parts, fasteners, pressure vessels and implants. Can be solution treated and aged for more strength in thin sections. Retains its properties up to about 350 °C.

0.2 % proof strength Rp0.2: ≥ 828 MPa1guaranteed minimum · annealed, sheet and plate 0.025–1.000 in; also ASTM B348 bars < 3 in
Tensile strength Rm: ≥ 895 MPa1guaranteed minimum · annealed, sheet and plate 0.025–1.000 in; also ASTM B348 bars < 3 in
Elongation after fracture A: ≥ 10 %1guaranteed minimum · annealed
Density ρ: 4 420 kg/m³1nominal
Modulus of elasticity E: 107 000–122 000 MPa1guaranteed range

How we know these values · 19 values from 2 sources

Single source: 19
Disagreements explained: 3

Click any value under “All values” to see the sources that state it, with dates.
3 disagreements between sources, each explained under its value.
How we rate evidence

What to watch

Sources disagree on density; the reason is given under the value.
Not yet sourced: Solution treated and aged minimums (Mil-T-9047) as separate values.

All values

Identity and composition 7
Mechanical 7
Physical 1
Thermal 3
Electrical and magnetic 1
Chemical and durability not yet

Mechanical

Elastic

Modulus of elasticity E

Young's modulus for design.

Condition	Value	Evidence
	107 000–122 000MPa	Single source

Shear modulus G

G = E / 2(1 + ν).

Condition	Value	Evidence
	41 000–45 000MPa	Single source

Poisson's ratio ν

In the elastic range.

Condition	Value	Evidence
	≈ 0.31typical	Single source

Strength

0.2 % proof strength Rp0.2

Minimum 0.2 % proof strength.

Condition	Value	Evidence
	≥ 828MPa	Single source

Tensile strength Rm

Ultimate tensile strength. Product standards give a range or a minimum.

Condition	Value	Evidence
	≥ 895MPa	Single source

Ductility

Elongation after fracture A

Minimum elongation; depends on gauge length and test direction.

Condition	Value	Evidence
	≥ 10%	Single source

Reduction of area Z

Minimum necking at fracture of a tensile test piece, relative to its cross-section.

Condition	Value	Evidence
	≥ 25%	Single source

Physical

Density ρ

Mass per unit volume.

Condition	Value	Evidence
	4 420kg/m³	Single source1

Thermal

Coefficient of thermal expansion α

Linear, near room temperature.

Condition	Value	Evidence
	≈ 9×10⁻⁶ /Ktypical	Single source

Specific heat capacity cp

Heat needed to warm 1 kg by 1 K.

Condition	Value	Evidence
	≈ 580J/(kg·K)typical	Single source1

Thermal conductivity λ

Heat flow through 1 m of material per kelvin of temperature difference.

Condition	Value	Evidence
	≈ 6.6W/(m·K)typical	Single source

Electrical and magnetic

Electrical resistivity ρe

Resistance of a 1 m cube between opposite faces.

Condition	Value	Evidence
	≈ 1.68 × 10⁻⁶Ω·mtypical	Single source1

Chemical composition

Show on the periodic table

ASTM Grade 5, %

Element	Applies to	Range %	Evidence
Al	all thicknesses	5.5–6.75	Single source
V	all thicknesses	3.5–4.5	Single source
Fe	all thicknesses	0.40	Single source
O	all thicknesses	0.20	Single source
C	all thicknesses	0.080	Single source
N	all thicknesses	0.050	Single source
H	all thicknesses	0.015	Single source

Zapp lists Fe ≤ 0.30 % (DIN 3.7165). ELI (Grade 23) has O ≤ 0.13 %.

Compare side by side

With any other grade

Sources here are public pages that reproduce ASTM B265. For design and acceptance, the standard edition named in your specification and the inspection certificate (EN 10204 3.1) of the delivered product take precedence. Design factors are recommended values; your National Annex may set others.