gr5 titanium alloy pipe standard: astm b 337/338,astm b 861/862 ... ,China Grade: Gr5, Titanium pipeTitanium tube, titanium pipe titanium alloy tube, titanium alloy pipe, titanium elbow seamless titanium tube and welding titanium ... .5) technique: Seamless, welding6) surface: Polished bright surface4. Features: Low density, high specific strength, excellent corrosive resistance, no rust, good thermal ...