TITANIUM ALLOY
Ti - 5AI - 2Zr - 2Sn - 4Mo - 4Cr (Ti - 17)
ASTM GRADE (UNS NO.)
(R58650)
Chemical Composition (wt. %)
(Max. values unless range is shown) 		4.5-5.5AI; 3.5-4.5Cr; 3.5-4.5Mo; 1.5-2.5Sn; 1.5-2.5Zr; 0.3Fe; 0.04N; 0.0125H; 0.08-0.13O
TENSILE PROPERTIES
Guar.R.T.
Min.*
Typical Elevated Temp. Prop. (STA)
204°C(400°F)
315°C(600°F)
371°C(700°F)
Ultimate Strength
MPa (ksi)
1165 (169)
993 (144)
965 (140)
917 (133)
Yield Strength,
0.2% offset
MPa (ksi)
1110 (161)
841 (122)
807 (117)
745 (108)
Elongation in 51 mm
(2") gage length
(%)
10
14
12
13
Reduction in Area -
Bar, Billet & Forging only
(%)
32
46
48
47
OTHER MECHANICAL PROPERTIES
*Alpha-Beta processed

Stress to Rupture
in Time Shown

Stress
MPa (ksi)
 
965 (140)
896 (130)
690 (100)
Time-Hrs. at Temp. (°C)  
800 (204)
1000 (315)
7500 (427)
Stress & Time to
Produce Elongation
Shown (creep)
Stress
MPa (ksi)
 
793 (115)
690 (100)
241 (35)
Time-Hrs. at Temp. (°C)  
2200 (204)
1000 (315)
150 (427)
Creep
(%)
 
0.2
0.2
0.2
Charpy V-Notch
Impact @ R.T.
Joules
(ft-lbs)
—
Bend Radius Under 1.78 mm (0.070") thick
—
1.78 mm (0.070") and over

—
Welded Bend Radius
—
Nominal Hardness
40 HRC
PHYSICAL PROPERTIES
  
Nominal Beta
Transus
°C (°F)
890 (1635)
Coefficient of
Thermal Expansion
10-6/°C
(10-6/°F) 		0-100°C (32 -212°F)

9.7 (5.4)
0-315°C (32-600°F)
—
0-538°C (32-1000°F)
—
0-648°C (32-1200°F)
—
0-816°C (32-1500°F)
—
Density
g/cm3 (lbs/in3)
4.65 (0.168)
Melting
Point,
Approx.
°C (°F)
N/A
Electrical
Resistivity
@ R.T.
10-6 ohm·cm
(10-6 ohm·in)
N/A
Modulus of
Elasticity ­
Tension
GPa (103 ksi)
114 (16.5) Dynamic
Modulus of
Elasticity ­
Torsion
GPa (103 ksi)
—
Thermal
Conductivity
W/m·°C (BTU/hr·ft·°F)
N/A
Specific
Heat
J/Kg·°C (BTU/lb·°F)
N/A
Weldability
—
Industry Specifications
AMS - 4995