... ,Gr3,Gr5,Gr7,Gr9,Gr11,Gr12,Gr16,Gr17,Gr232 OD:2mm-219mm3 WT:0.3mm-15.24mm4 L:with in 18Meters5 ... corrosion-resistance. Of course it costs higher. 7 Alloy grade 9, Ti-3Al-2.5V, is the most widely used in ... the similar properties with the grade 7 but costs lesser. 9 Alloy grade 23, Ti-6Al-4V ELI (Extra Low Interstitial ...