TIMETAL® 6-2-4-6 Titanium Alloy (Ti-6Al-2Sn-4Zr-6Mo), Beta Forged + STA

Subcategory: Alpha/Beta Titanium Alloy; Metal; Nonferrous Metal; Titanium Alloy

Key Words: UNS R56260

Component    Wt. % Al 5.5 - 6.5   C Max 0.04   Fe Max 0.15   H Max 0.125

Component    Wt. % Mo 5.5 - 6.5   N Max 0.04   O Max 0.15

Component    Wt. % Sn 1.75 - 2.25   Ti 79.4 - 83.7   Zr 3.6 - 4.4

Material Notes:
Titanium content above is calculated as the remainder and may not reflect the actual range.

This entry has UTS, TYS, Elongation, ROA, and fatigue values specific to material in the Beta Forged + STA (885°C/1hr/AC + 595°C/8hr/AC) condition. Other data below are typical of TIMETAL® 6-2-4-6.

High-Strength, Intermediate Temperature Alloy

Features: TIMETAL 6-2-4-6 is a stronger derivative of TIMETAL 6-2-4-2 offering higher strength, depth hardenability and elevated temperature properties up to 450°C. This alloy is similar in forgeability and crack sensitivity to TIMETAL 6-4. This alloy is used in intermediate compressor stages of turbine engines for disks and blades, seals, and for airframe parts. It is nonmagnetic.

Data provided by TIMET.

Physical Properties	Metric	English	Comments
Density	4.64 g/cc	0.168 lb/in³	Typical
Mechanical Properties
Tensile Strength, Ultimate	1199 MPa	174000 psi
Tensile Strength, Yield	1047 MPa	152000 psi
Elongation at Break	7 %	7 %
Reduction of Area	13 %	13 %
Modulus of Elasticity	115 GPa	16700 ksi	Typical
Fatigue Strength	262 MPa	38000 psi	Notched; 10^7 cycles
Fatigue Strength	675 MPa	97900 psi	Smooth; 10^7 cycles
Electrical Properties
Electrical Resistivity	0.00019 - 0.000205 ohm-cm	0.00019 - 0.000205 ohm-cm
Thermal Properties
CTE, linear 20°C	9 µm/m-°C	5 µin/in-°F	20-100°C
Specific Heat Capacity	0.502 J/g-°C	0.12 BTU/lb-°F
Thermal Conductivity	7.61 W/m-K	52.8 BTU-in/hr-ft²-°F
Melting Point	1595 - 1675 °C	2900 - 3050 °F
Solidus	1595 °C	2900 °F
Liquidus	1675 °C	3050 °F
Beta Transus	940 °C	1720 °F