TITANIUM ALLOY
COMMERCIALLY PURE/UNALLOYED
ASTM GRADE (UNS NO.)
GRADE 4 (R50700)
Chemical Composition (wt. %)
(Max. values unless range is shown) 		0.08C; 0.05N; 0.40O; 0.50Fe; 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)
552 (80)
538 (78)
365 (53)
283 (41)
214 (31)
Yield Strength,
0.2% offset
MPa (ksi)
483 (70)
421 (61)
255 (37)
172 (25)
145 (21)
Elongation in 51 mm
(2") gage length
(%)
15
23
25
28
26
Reduction in Area -
Bar, Billet & Forging only
(%)
25
 
OTHER MECHANICAL PROPERTIES
  

Stress to Rupture
in Time Shown

Stress
MPa (ksi)
 
462 (67)
330 (48)
200 (29)
241 (35)
Time-Hrs. at Temp. (°C)  
1,000 (25)
10,000 (100)
1,000 (315)
10,000 (250)
Stress & Time to
Produce Elongation
Shown (creep)
Stress
MPa (ksi)
 
283 (41)
188 (27)
116 (17)
200 (29)
Time-Hrs. at Temp. (°C)  
1,000 (25)
1,000 (100)
1,000 (200)
1,000 (315)
Creep
(%)
 
1.0
0.1
0.1
1.0
Charpy V-Notch
Impact @ R.T.
Joules
(ft-lbs)
13 -27 (10 - 20)
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
3.0 - 5.0 x Thickness
Nominal Hardness
100 HRB
PHYSICAL PROPERTIES
Nominal Beta
Transus
°C (°F)
949 (1740)
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)
60 (24)
Modulus of
Elasticity ­
Tension
GPa (103 ksi)
105 (15.2)
Modulus of
Elasticity ­
Torsion
GPa (103 ksi)
45 (6.5)
Thermal
Conductivity
W/m·°C (BTU/hr·ft·°F)
17.3 (10.0)
Specific
Heat
J/Kg·°C (BTU/lb·°F)
540 (0.129)
Weldability
Good
Industry Specifications
ASTM -
B265, B348, B381, F67; AMS 4901 and 4921