SML Ti Tube Grade 5
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» Titanium IMI 685
Titanex supplies this HIGH-TEMPERATURE, HIGH-STRENGTH CREEP RESISTANT ALLOY as a wire with max. 12 mm diameter. Ti-6Al-5Zr-0.5Mo-0.25Si is a near alpha alloy, combines excellent tensile strength with high temperature (968°F / 520°C) creep resistance. It is a weldable alloy that has good forging characteristics - forging temperatures above the beta transus can be used. The alloy may be joined by the processes normally used in the fabrication of titanium, including argon-arc, electron beam and friction welding. Material should be fully heat treated prior to welding, and also given a suitable post-weld treatment (exam-ple 4-8hrs at 1022°F / 550°C). The weld zone of material treated in this way will have similar structure and properties to the parent metal. IMI 685 alloy was specifically developed for the aero-engine industry.
Composition Physical Data Mechanical Data Fabrication Information
» Composition
C | < 0.08 % |
N2 | < 0.03 % |
O2 | < 0.2 % |
H2 | < 0.01 % |
Al | 5.7 - 6.3 % |
Zr | 4.5-6 % |
Mo | 0.25-0.75 % |
Si | 0.015-0.35 % |
Ti = | Rem |
» Physical Data
Minimum | Typical | |
Density g/cm3 (lb/cu.in) | 4.45(0.161) | |
Thermal Conductivity W/mK | 2.4 | |
*Mean Thermal Exp. Coeff. 0-100°C/°C | 9.7-10.1 x 10 -6 | |
Beta Transus °C+/-15°C(°F) | 1020 (1868) |
» Mechanical Data
Minimum | Typical | |
Tensile Strength MPa(ksi) | 1030 (149) | |
0.2% Proof Stress MPa(ksi) | 900 (131) | |
Elongation over 2 Inches % | 10 | |
Reduction in Area % | 20 | |
Elastic Modulus GPa(Msi) | 125 (18.1) | |
@ 520 °C | Minimum | Typical |
Tensile Strength MPa(ksi) | 670 (97) | |
0.2% Proof Stress MPa(ksi) | 525 (76) | |
Elongation over 2 Inches % | 12 | |
Reduction in Area % | 36 |
» HEAT TREATMENT
Treatment
Temperature [°F (°C)] Time Hours Cooling Method |
Solution Heat Treatment |
1922°F (1050°C) / 30 minutes / Oil Quench* |
Aging Heat Treatment |
1022°F (550°C) /24 hours / Air Cool |