Ti 6242(Ti-Al-Sn-Zr-Mo)

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1. Introduce

– High temperature titanium alloy

– Titanium alloyed with key alloying elements Al 6%, Sn 2%, Zr 4%, Mo 2%.

– Weldable, near alpha alloy that provides excellent mechanical strength, stability, and creep resistance at temperatures as high as 550 degrees Celsius

– Excellent thermal stability when exposed to heat at 540 degrees for 1000 hours

– Utilized in applications where creep strength is required

– UNS R54620

* Near ɑ alloy

Features
– Excellent mechanical strength, fracture toughness, and creep resistance
– Maintains high temperatures up to 600 degrees
– Small amount of ductile beta phase present in near alpha alloys
Types
– Ti-5Al-2.5Sn
– Ti-8Al-1Mo-1V
– Ti-6Al-2Sn-4Zr-2Mo
– Ti-6Al-2Sn-4Zr-2Mo-0.1Si
– Ti-5.5Al-3.5Sn-3Zr-1Nb

* UNS

Abbreviation for Unified Numbering Systems for Metals and Alloys
Unified unique numbering system for metals and alloys
A representative number that is compatible with metals and alloys defined in many material-related codes such as ASTM, AISI, ASME, AWS, etc.

* R : Reactive and Refractory Metals and Alloys

* UNS R54620 : 5XXXX : Titanium

2. Property

– Excellent strength, toughness, creep strength, corrosion resistance, thermal stability, and fatigue resistance

Element	Impact
Al	Grain refinement element, provides high temperature oxidation resistance
Sn	Highly strengthened element, provides strength and hardness
Zr	Provides corrosion resistance
Mo	Provides corrosion resistance, pitting and crevice corrosion resistance, high temperature strength, creep rupture strength, and toughness

[Ti 6242 Chemical Composition (%)]

Ti	N	C	H
83.63 ~ 87.24	Max. 0.05	Max. 0.08	Max. 0.01

Fe	O	Al	Mo
Max. 0.25	Max. 0.15	5.50 ~ 6.50	1.80 ~ 2.20

Zr	Sn	Si	Others
3.60 ~ 4.40	1.80 ~ 2.20	0.06 ~ 0.13	Max. 0.40

[Ti 6242 Mechanical Properties]

Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)	Hardness HV typical
1010	990	3	318

[Ti 6242 Physical Properties]

Density (g/㎤)	Melting Range (℃)	Beta transus temperature (℃)	Specific Heat (0-100℃), J/kg*℃
4.54	1588 ~ 1716	995 ± 15	460

3. Standard & Specification

– Specification : UNS R54620

Product Form	SAE	AMIL
Sheet, Strip, Plate	AMS 4919	–
Bar, Rod, Wire, Rings	AMS 4975	T-9047G
Forgings	AMS 4976	–

4. Available Form

– Sheet, Strip, Plate

– Bar, Rod, Wire, Rings

– Forgings

5. Application & Product

– Aerosapce

Application	Product
Aerospace	Aircraft frames, Gas turbine engines, Afterburner cans, Hot air blower components, Precision racing engine parts, Disks, Impellers, Turbines, Jet engine compressors, Jet engine compressors