Advanced Metals
Ti-6Al-2Sn-4Zr-2Mo
Ti-6Al-2Sn-4Zr-2Mo alloy is a heat resistant alloy developed in the latter half of 1960s. Its heat resistant temperature is approximately 450˚C. Grade Ti-6Al-2Sn-4Zr-2Mo titanium alloy is a near-alpha alloy, primarily used for high strength and toughness, with good creep resistance up to 1000°F. Forging and machining characteristics are similar to those of Ti 6Al-4V. It was developed to handle operations in high temperature applications of up to 538°C (°1000.4°F).
This alloy has a combination of excellent strength and corrosion resistance with comparatively good weldabilty and fabricability. It is the most commonly used high temperature alloy in jet engine compressors and airframe structures. It is also used in sheet melt form for engine afterburner structure and for various hot airframe skin applications. It is nonmagnetic.
Typical heat treatment for this alloy: Rough forging: 1038°C. Stress relief anneal: 482-649°C for 1-4 hrs, air cool. Solution treatment: 15-30°C below beta transus for 1 hour, water quench. Aging: 538-593°C for 8 hrs, air cool.
Chemical composition of Ti-6Al-2Sn-4Zr-2Mo (%, max.)
Grade
UNS
DIN
O
N
C
H
Fe
Si
Al
Sn
Zr
Mo
Ti-6242
R54620
3.7145
0.12
0.05
0.05
0.015
0.25
0.1
5.5-6.5
1.8-2.2
3.6-4.4
1.8-2.2
Grade
Tensile strength
Yield strength
Elongation in 4D
Reduction of area
Hardness
Ti-6242
1010
930
12
20
320
(MPa)
(MPa)
(%)
(%)
(HV)
Available forms
Forging
Rod and bar
Customized
Specification
AMS 4919, AMS 4956, AMS 4975, AMS 4976
MIL-T-9046, MIL-T-9047
Typical application
▲ Compressor discs, blades
▲ Hush kits
▲ Airframe structure and skin
▲ Jet engine compressors
▲ High performance racing engine components
