Nihonweld NT-CuMnNiAl description: NIHONWELD NT-CuMnNiAl manganese-nickel-aluminum bronze is available in bare filler metal rod and wire for welding cast ship propellers conforming to MIL-B-21230, Alloy 2 (AMPCO 495) for high resistance to corrosion, erosion and
cavitation. NIHONWELD NT-CuMnNiAl also exhibits good ability to join dissimilar metals.