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» Titanium 6-2-4-2

Titanex supplies this MEDIUM-STRENGTH, ELEVATED TEMPERATURE ALLOY as a wire with max. 12 mm diameter. Ti 6Al 2Sn 4Zr 0.08Si has an outstanding combination of tensile strength, creep strength, toughness, and high-temperature stability for long term application at temperatures up to 1000°F (538°C). Its primary application is gas turbine compressor components such as blades, discs, and impellers. The 6-2-4-2 is also used in sheet metal form for engine afterburner structure and for various hot airframe skin applications. Forging and machining characteristics of 6-2-4-2 are very similar to Grade 5 (Ti6Al4V).

Composition Titanium 6Al4V Physical Data Titanium Alloys Mechanical Chemical Physical Properties Mechanical Data Titanium Grades 1 2 3 4 5 7 9 11 12 19 Beta C Fabrication Information

» Composition

C < 0.08 %
Fe < 0.25 %
N2 < 0.05 %
O2 < 0.25 %
H2 < 0.01-0.0125 %
Al 5.5 - 6.5 %
Zn 1.8-2.2 %
Zr 3.6-4.4 %
Mo 1.8-2.2 %
Si 0.06-0.13 %
Ti = Rem

» Physical Data

  Minimum Typical
Density g/cm3 (lb/cu.in)   4.54(0.164)
Melting Range °C+/-15°C (°F)   1705(3100)
Specific Heat J/g/°C   0.46
Volume Electrical Resistivity µohm.cm (µohm.in)   72-74(18.5-19)
Thermal Conductivity W/mK 6.92  
*Mean Thermal Exp. Coeff. 0-100°C/°C   8.6 x 10 -6
*Mean Thermal Exp. Coeff. 0-300°C/°C   7.7 x 10 -6
Beta Transus °C+/-15°C(°F)   955 (1825)

» Mechanical Data

  Minimum Typical
Tensile Strength MPa(ksi) 1004 (144) 1045 (146)
0.2% Proof Stress MPa(ksi) 895 (130) 955 (139)
Elongation over 2 Inches % 19 18
Reduction in Area % 42 40
Elastic Modulus GPa(Msi)   114 (16.5)
@ 480 °C Minimum Typical
Tensile Strength MPa(ksi) 716 (104) 735 (107)
0.2% Proof Stress MPa(ksi) 545 (79) 565 (82)
Elongation over 2 Inches % 26 25
Reduction in Area % 63 67

» HEAT TREATMENT

Treatment Temperature
°F (°C)
Time Hours Cooling Method
Duplex Anneal(DA)
1st Stage 1650 (900) --- Air Cool
2nd Stage 1450 (785) --- Air Cool
Triplex Anneal(TA)
1st Stage 1650 (900) 2 Air Cool
2nd Stage 1450 (785) --- Air Cool
3rd Stage 1100 (595) 2 Air Cool