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PRODUCT DATA of IMI 685
MaterialIMI 685
Product DatasheetIMI 685
General InformationTIMETAL 685, 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. data from timet
Chemical CompositionTi-6Al-5Zr-0.5Mo
Name of ManufacturerTIMET
The Hub,Holford Road, Witton, Birmingham B6 7AX, UK

+44 121 356-1155 EuroSales@timet.com
+44 121 356-5413
www.timet.com
PHYSICAL PROPERTIES
Specific Gravity4.45
Magnetic PropertiesNonmagnetic
THERMAL PROPERTIES
Thermal Conductivity4.15 W/m.K
Thermal Expansion Coefficient9.7 μstrain/°C
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Bimetallic CorrosionCan be connected without any restriction to: Cr, Cu, Brass, Cu-Ni alloys, Al-bronzes, Si-bronzes, Gun metal, P-bronzes, Sn-bronzes, Ag, 300 and 400 series stainless steel, low alloy steel, Au, Pt, C, Rh
Can be connected in a non-controlled environment to the above and Ni, Monel, Inconel, Ni-Mo alloys
Can be connected in a clean room environment to above and Cd, Al-Cu alloys
Needs specific measures: All others
Test:ECSS-Q-ST-70C Rev.1 Table 5.1
Data Quality: Design Data