N2,N4,N6
 

Nickel,Type,N2,N4,N6,ASTM B162(Plate/Sheet),
ASTM B160(Bar/Rod),
ASTM B161/163(Seamless Tube/pipe),
ASTM B725/730(Weld Pipes/Tubes),
Fittings(ASTM B366/ASME SB366),
ASTM B564(Forgings),
Wire(Din 17753,ISO9724)