Trade N2, N4,N6,B30,NS312,NS331,NS322,HC276 Specification GB4435-84 GB3120-82 Dimension Dia(0.5~6)*L mm Dia(6~120)*L mm Nickel and nickel alloy tubes: 1) specification:ASTM B161,163,167 2) nickel200,201,monel400,inconel600,inconel825,incoloy6003) diameter range:10-168mm thickness:0.5-20mm Monel 400(Nicorros 400) Nickel tube