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Welding Titanium Tube for Heat Sink Titanium Seamless Pipe ASTM B338 Gr1 Gr2 Gr7 Gr9 Titanium Tube 1. Product description Material: GR1 GR2 Gr5 GR7 GR9 (Ti-3AL-2.5V) Standard : ASTM B338 ASTM B337 ...