TITANIUM ALLOY
Ti - 5AI - 2.5Sn - ELI
ASTM GRADE (UNS NO.)
(R54521)
Chemical Composition (wt. %)
(Max. values unless range is shown) 		0.08C; 0.50Fe; 0.05N; 4.0-6.0Al; 2.0-3.0Sn; 0.20O; .0175H (billet); 0.020H (bar); 0.020H (sheet)
TENSILE PROPERTIES
Guar.R.T.
Min.
Typical Cryogenic Properties
-196°C(-320°F)
-253°C(-423°F)
Ultimate Strength
MPa (ksi)
724 (105)
1310 (190)
1580 (229)
Yield Strength,
0.2% offset
MPa (ksi)
690 (100)
1210 (175)
1420 (206)
Elongation in 51 mm
(2") gage length
(%)
10
16
15
Reduction in Area -
Bar, Billet & Forging only
(%)
25
OTHER MECHANICAL PROPERTIES
 

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)
20 (15)
Bend Radius Under 1.78 mm (0.070") thick
4.0 x Thickness
1.78 mm (0.070") and over
4.5 x Thickness
Welded Bend Radius
4.0 - 5.0 x Thickness
Nominal Hardness
33 HRC
PHYSICAL PROPERTIES
  
Nominal Beta
Transus
°C (°F)
1038 (1900)
Coefficient of
Thermal Expansion
10-6/°C
(10-6/°F) 		0-100°C (32 -212°F)

9.4 (5.2)

0-315°C (32-600°F)
9.5 (5.3)
0-538°C (32-1000°F)
9.7 (5.4)
0-648°C (32-1200°F)
9.7 (5.5)
0-816°C (32-1500°F)
10.1 (5.6)
Density
g/cm3 (lbs/in3)
4.48 (0.162)
Melting
Point,
Approx.
°C (°F)
1600 (2910)
Electrical
Resistivity
@ R.T.
10-6 ohm·cm
(10-6 ohm·in)
160 (406)
Modulus of
Elasticity ­
Tension
GPa (103 ksi)
110 (16) - 124 (18)
Modulus of
Elasticity ­
Torsion
GPa (103 ksi)
48 (7.0)
Thermal
Conductivity
W/m·°C (BTU/hr·ft·°F)
7.8 (4.5)
Specific
Heat
J/Kg·°C (BTU/lb·°F)
530 (0.127)
Weldability
Very Good
Industry Specifications
AMS - 49909, 4924;
MIL-T -
9046 and 9047