TITANIUM ALLOY
COMMERCIALLY PURE/UNALLOYED
ASTM GRADE (UNS NO.)
GRADE 3 (R50550)
Chemical Composition (wt. %)
(Max. values unless range is shown) 		0.08C; 0.05N; 0.35O; 0.30Fe; 0.015H
TENSILE PROPERTIES
Guar.R.T.
Min.
Typical Elevated Temperature Properties
93°C(200°F)
204°C(400°F)
 315°C(600°F)
426°C(800°F)
Ultimate Strength
MPa (ksi)
448 (65)
469 (68)
310 (45)
262 (38)
207 (30)
Yield Strength,
0.2% offset
MPa (ksi)
379 (55)
338 (49)
207 (30)
138 (20)
117 (17)
Elongation in 51 mm
(2") gage length
(%)
18
24
35
33
22
Reduction in Area -
Bar, Billet & Forging only
(%)
30*
 
OTHER MECHANICAL PROPERTIES
  

Stress to Rupture
in Time Shown

Stress
MPa (ksi)
 
400 (58)
300 (43)
228 (33)
138 (20)
Time-Hrs. at Temp. (°C)  
1,000 (25)
10,000 (100)
10,000 (100)
1,000 (250)
Stress & Time to
Produce Elongation
Shown (creep)
Stress
MPa (ksi)
 
283 (41)
241 (35)
83 (12)
131 (19)
Time-Hrs. at Temp. (°C)  
100 (25)
1,000 (25)
1,000 (315)
1,000 (250)
Creep
(%)
 
1.0
1.0
1.0
1.0
Charpy V-Notch
Impact @ R.T.
Joules
(ft-lbs)
24 - 48 (18 - 35)
Bend Radius Under 1.78 mm (0.070") thick
2.0 - 2.5 x Thickness
1.78 mm (0.070") and over
2.5 x Thickness
Welded Bend Radius
2.5 - 3.0 x Thickness
Nominal Hardness
90 HRB
PHYSICAL PROPERTIES
Nominal Beta
Transus
°C (°F)
920 (1690)
Coefficient of
Thermal Expansion
10-6/°C
(10-6/°F) 		0-100°C (32 -212°F)
8.6 (4.8)
0-315°C (32-600°F)
9.2 (5.1)
0-538°C (32-1000°F)
9.7 (5.4)
0-648°C (32-1200°F)
10.1 (5.6)
0-816°C (32-1500°F)
10.1 (5.6)
Density
g/cm3 (lbs/in3)
4.51 (0.163)
Melting
Point,
Approx.
°C (°F)
1660 (3020)
Electrical
Resistivity
@ R.T.
10-6 ohm·cm
(10-6 ohm·in)
56 (22)
Modulus of
Elasticity ­
Tension
GPa (103 ksi)
103 (15 )
Modulus of
Elasticity ­
Torsion
GPa (103 ksi)
43 (6.2)
Thermal
Conductivity
W/m·°C (BTU/hr·ft·°F)
19.7 (11.4)
Specific
Heat
J/Kg·°C (BTU/lb·°F)
520 (0.124)
Weldability
Very Good
Industry Specifications
ASTM -
B265, B337, B338, B348, B363, B381, B861, B862, F67 and AMS 4900