TITANIUM ALLOY
Ti - 6AI - 4V ELI*
ASTM GRADE (UNS NO.)
GRADE 23 (R56407)
Chemical Composition (wt. %)
(Max. values unless
range is shown) 		0.08C; 0.03N; 0.13O; 0.25Fe; 5.5-6.5AI; 3.5-4.5V; 0.0125H
TENSILE PROPERTIES
Guar. R.T. Min.**
Guar. R.T. Min.***
Typical Elevated Temp. Prop.****
93°C(200°F)
149°C(300°F)
 204°C(400°F) 260°C(500°F)
Ultimate Strength
MPa (ksi)
862 (125)
827 (120)
833 (121)
770 (112)
723 (105)
678 (98)
Yield Strength,
0.2% offset
MPa (ksi)
793 (115)
759 (110)
712 (103)
640 (93)
587 (85)
532 (77)
Elongation in
51 mm
(2") gage length
(%)
10
[7.5(6.5)]****
13
15
16
16
Reduction in Area-Bar, Billet &
Forging only
(%)
25
15
 
OTHER MECHANICAL PROPERTIES
* Extra low interstitials
** Per ASTM F136 specification
*** Per ASTM "B" product specifications
**** Transformed-beta condition

Stress to Rupture
in Time Shown

Stress
MPa (ksi)
 
Time-Hrs. at Temp. (°C)
 
Stress & Time to
Produce Elongation
Shown (creep)
Stress
MPa (ksi)
 
Time-Hrs. at Temp. (°C)
 
Creep
(%)
 
Charpy V-Notch
Impact @ R.T.
Joules
(ft-lbs)
24 - 40 (18 - 30)
Bend Radius Under 1.78 mm (0.070") thick
4.5 x Thickness
1.78 mm (0.070") and over
5.0 x Thickness
Welded Bend Radius
6 - 10 x Thickness
Nominal Hardness
32 HRC
PHYSICAL PROPERTIES
Nominal Beta
Transus
°C (°F)
982 (1800)
Coefficient of
Thermal Expansion
10-6/°C
(10-6/°F) 		0-100°C (32 -212°F)
9.2 (5.1)
0-315°C (32-600°F)
9.5 (5.3)
0-538°C (32-1000°F)
10.1 (5.6)
0-648°C (32-1200°F)
10.4 (5.8)
0-816°C (32-1500°F)
10.8 (6.0)
Density
g/cm3 (lbs/in3)
4.43 (0.160)
Melting
Point,
Approx.
°C (°F)
1650 (3000)
Electrical
Resistivity
@ R.T.
10-6 ohm·cm
(10-6 ohm·in)
165 (65)
Modulus of
Elasticity ­
Tension
GPa (103 ksi)
114 (16.5)
Modulus of
Elasticity ­
Torsion
GPa (103 ksi)
42.8 (6.2)
Thermal
Conductivity
W/m·°C (BTU/hr·ft·°F)
7.3 (4.2)
Specific
Heat
J/Kg·°C (BTU/lb·°F)
565 (0.135)
Weldability
Very Good
Industry Specifications
ASTM - B265, B348, B363, B381, B861, B862 and F136;
AMS -
4907, 4930 and 4956