... , C70400, C70600, C71500, 71640 Admiralty brass, aluminium brass, cupronickel. ASTM B111 seamless cupronickel ASTM B111 seamless cupronickel tubeMaterial: C68700, C70400, C70600, C71500, 71640Admiralty brass ... , aluminium brass, cupronickel.Standard: ASTM B111/ASME SB111Size: OD: 3-508mm, WT: 0.25-15mmAdvantage:Advanced ...