Physical,chemical properties and application of Gr9 titanium alloy
2020-05-16 09:49:56
This article will introduce the physical,chemical properties and application of Gr9 titanium alloy for you.
Ti-3Al-2.5V(Gr9 titanium alloy):
Gr9 titanium alloy is an alpha-type titanium alloy with a nominal composition of Ti-3Al-2.5V, which was developed as a cold-workable material. Itsoffers 20 to 50% higher strength than commercially pure grades, but is more formable and weldable than Ti6Al4V.
Compostion of Ti-3Al-2.5V(Gr9 titanium alloy):
C
N
O
V
Al
Fe
H
Ti
Content
≤0.05%
≤0.02%
≤0.12%
≤3.0%-2.0%
≤3.5%-2.5%
0.0100%
0.013%
Balance
(Elemental Composition per ASTM B265)
Applications of Ti-3Al-2.5V(Gr9 titanium alloy):
Grade 9 titanium has excellent properties in good ductility, moderately high strength, excellent resistance to corrosion and can be used at higher temperatures than the Commercially Pure Grades 1 through 4. And it also can be hardened by cold work and aging.Because it has these performance,so Gr9 can be used in some common applications such as:medical pacemakerstennis racquetshydraulic tubinghoneycombgolf club shaftsbellowsbicycle frames
Properties of Ti-3Al-2.5V(Gr9 titanium alloy):
Physical Properties
Metric
English
Density
4.48 g/cc
0.162 lb/in³
Mechanical Properties
Metric
English
Hardness, Rockwell C
24
24
Tensile Strength, Ultimate
620MPa
89900psi
Tensile Strength, Yield
500MPa
72500psi
Elongation at Break
15 %
15 %
Tensile Modulus
100GPa
80.0GPa(@Temperature 230℃)
14500ksi
11600ksi(@Temperature 446℉)
Compressive Yield Strength
690MPa
100000psi
Poissons Ratio
0.30
0.30
Fatigue Strength
170MPa
@# of Cycles 1.00e+7280MPa
@# of Cycles 50000280MPa
@# of Cycles 1.00e+7380MPa
@# of Cycles 4000024700psi
@# of Cycles 1.00e+740600psi
@# of Cycles 5000040600psi
@# of Cycles 1.00e+755100psi
@# of Cycles 40000
Fracture Toughness
100MPa-m½
91.0ksi-in½
Shear Modulus
44.0GPa
6380 ksi
Electrical Properties
Metric
English
Electrical Resistivity
0.000127 ohm-cm
0.000127 ohm-cm
Thermal Properties
Metric
English
coefficient of thermal expansion
9.61 µm/m-℃
@Temperature 20.0 - 95.0 C
9.67 µm/m-℃
@Temperature 20.0 - 205 C
9.86 µm/m-℃
@Temperature 20.0 - 315 C
9.97 µm/m-℃
@Temperature 20.0 - 540 C
5.34 µin/in-F
@Temperature 68.0 - 203℉
5.37 µin/in-℉
@Temperature 68.0 - 401 F
5.48 µin/in-℉
@Temperature 68.0 - 599 F
5.54 µin/in-℉
@Temperature 68.0 - 1000℉
Melting Point
≤1700℃
≤3090℉
Specific Heat Capacity
0.525 J/g-℃
0.125 BTU/lb-℉
Thermal Conductivity
8.30W/m-K
@Temperature23.0 °C11.8W/m-K
@Temperature 315 °C57.6BTU-in/hr-ft²-°F
@Temperature73.4 °F81.9BTU-in/hr-ft²-°F
@Temperature 599 °FBeta Transus
935℃
1720℉
Fabrication:
• Forging – Rough 871-899°C (1600-1650°F), finish 843-871°C (1550-1600°F)
• Annealing – 593-760°C (1100-1400°F), 1-3hr, AC
• Solution Treating – 871-927°C (1600-1700°F), 15-20 min, WQ.
• Ageing – 482-510°C (900-950°F), 2-8hr, AC.
• Stress Relief Annealing – 316-649°C (600-1200°F),1-3 hrs, AC.
Other Standards for Ti3Al2.5 include:
• AMS 4943
• AMS 4944
• AMS 4945
• ASTM B265-20a Gr9 and Gr18
• ASTM B337 Gr9(Withdrawn 1997)
• ASTM B338-17e1 Gr9
• ASTM B348-19 Gr9
• ASTM B381-13(2019)Gr9
• MIL –T –9047• MIL –T –9046 AB5
• ASTM B264 Gr9(Withdrawn 1954)
• UNS R56320 Grade 9• ASTM F3046 - 13
• ASTM F2146 - 13• ASTM B863 - 19
• ASTM B367 - 13(2017)
• ASTM B861 - 19
• ASTM B338 - 17e1
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