GR7 Titanium Alloy Bar

GR7 titanium alloy rod is an α titanium alloy, and its process performance and mechanical properties are similar to those of industrial pure titanium. However, its corrosion resistance is higher than that of pure titanium. In particular, pure titanium is not suitable for some media, or the corrosion rate is too fast. Considering the replacement cycle and procurement cost, more corrosion-resistant materials will be selected instead. When the amount of Pd added to titanium reaches 0.1%-0.2%, the corrosion rate of titanium in sulfuric acid and hydrochloric acid is significantly reduced. Further increasing the content of Pd, the corrosion rate of the alloy remains almost unchanged, and when the Pd content is lower than 0.05%, the corrosion rate increases instead. When the acid concentration is low, the titanium-palladium alloy containing 0.13% Pd has satisfactory corrosion resistance, but when the acid concentration is high, Ti-0.2Pd has better corrosion resistance, so Ti-0.2Pd is more suitable. GR7 titanium-palladium alloy rod is expensive because it contains precious metal palladium.

Physical Data
Density g/cm3 (lb/cu.in) ,4.51 (0.162)
Melting Range°C±15C(°F),1677(3051)
Specific Heat J/Kg/°C (BTU/Ib/°F),540(.129)
Volume Electrical Resistivity mohm.cm(mohm.in),56(22)
Thermal ConductivityW/mk (BTU/ft h°F),20.6(143)
Mean Thermal Exp.Coeff.0-100℃/℃(0-212F/F) 8.6x10-6(4.8)
Mean Thermal Exp.Coeff.0-300C/℃(0-572F/F) 9.2x10-6(5.1)
Beta TransusC±15°C(°F),913(1675)
Mechanical Data
Tensile Strength MPa (ksi),345(50) 483 (70)
0.2% Proof Stress MPa (ksi),376 (40) 352 (51)
Elongation over 2 inches %,20,28
Elastic Modulus GPa (Msi),103(15)
Hardness Bhn,160

Specified Bend Radius
Specified Bend Radius > 0.070in x Thickness,2.5
Welded Bend Radius x Thickness,3
Charpy,V-Notch Impact J(ft lbf),41 (30)
Fabrication
Weldability- Excellent
Forging- Rough 900°C (1650°F),
                Finish 843C (1550°F)
Annealing-704°C(1300°F),2hr,AC
Stress Relief Annealing -483-538C(900-1000°F),45mins

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