TITANIUM ALLOY
Ti - 3AI - 2.5V - 0.1Ru
ASTM GRADE (UNS NO.)
GRADE 28 (R56323)
Chemical Composition (wt. %)
(Max. values unless
range is shown) 		0.08C; 0.03N; 0.15O; 0.25Fe; 2.5-3.5AI; 2.0-3.0V; 0.08-0.14Ru; 0.015H
TENSILE PROPERTIES
Guar. R.T. Min.
Typical Elevated Temp. Prop. (Mill Ann.)
Mill Ann.
C.W.S.R.*
R.T.
149°C(300°F)
 204°C(400°F)
Ultimate Strength
MPa (ksi)
620 (90)
860 (125)
662 (96)
534 (77)
510 (74)
Yield Strength,
0.2% offset
MPa (ksi)
483 (70)
725 (105)
552 (80)
448 (65)
428 (62)
Elongation in
51 mm
(2") gage length
(%)
15 (12)**
10
23
26
—
Reduction in Area-Bar, Billet &
Forging only
(%)
25 (20)**
—
50
55
—
OTHER MECHANICAL PROPERTIES
 
*Cold-worked + stress relieved, only for tubing
**Transformed-beta condition only, red. in area min only for bar, billets and forgings

Stress to Rupture
in Time Shown

Stress
MPa (ksi)
421 (61)
Time-Hrs. at Temp. (°C)
1,000 (250)
Stress & Time to
Produce Elongation
Shown (creep)
Stress
MPa (ksi)
379 (55)
262 (38)
400 (58)
207 (30)
Time-Hrs. at Temp. (°C)
100,000 (93)
100,000 (177)
1,000 (250)
100,000 (315)
Creep
(%)
1.0
1.0
1.0
1.0
Charpy V-Notch
Impact @ R.T.
Joules
(ft-lbs)
48 - 102 (35 - 75)
Bend Radius Under 1.78 mm (0.070") thick
2.5 x Thickness
1.78 mm (0.070") and over
3.0 x Thickness
Welded Bend Radius
3.5 x Thickness
Nominal Hardness
25 HRC
PHYSICAL PROPERTIES
  
Nominal Beta
Transus
°C (°F)
935 (1715)
Coefficient of
Thermal Expansion
10-6/°C
(10-6/°F) 		0-100°C (32 -212°F)
9.5 (5.3)
0-315°C (32-600°F)
9.9 (5.5)
0-538°C (32-1000°F)
9.9 (5.5)
0-648°C (32-1200°F)
—
0-816°C (32-1500°F)
—
Density
g/cm3 (lbs/in3)
4.48 (0.162)
Melting
Point,
Approx.
°C (°F)
1700 (3100)
Electrical
Resistivity
@ R.T.
10-6 ohm·cm
(10-6 ohm·in)
126 (50)
Modulus of
Elasticity ­
Tension
GPa (103 ksi)
107 (15.5)
Modulus of
Elasticity ­
Torsion
GPa (103 ksi)
44 (6.3)
Thermal
Conductivity
W/m·°C (BTU/hr·ft·°F)
8.3 (4.8)
Specific
Heat
J/Kg·°C (BTU/lb·°F)
544 (0.13)
Weldability
Very Good
Industry Specifications
ASTM -
B265, B337, B338, B348, B381, B861 and B862