標題: 按照ASTM B545 標準鍍錫，C 類，鍍層厚度是多少？ [打印本頁] 作者: 105633469 時間: 2010-4-21 13:17 標題: 按照ASTM B545 標準鍍錫，C 類，鍍層厚度是多少？ 請教：按照ASTM B545 標準鍍錫，C 類，鍍層厚度是多少？作者: sjhuangjoanna 時間: 2010-5-12 15:07
Spec. Thickness Comment 9 C4 Q% h0 |" \% X1 RASTM-B- - u8 b- e* g" d545-97e1 ASTM requires purchaser to supply information, such as base metal, underplating, test requirements and test methods etc. In general, copper alloys containing more than 5% Zn shall have a copper undercoating of at least 0.0001" or nickel undercoating of at least 0.000050". - {: U$ T' ~ c( j( V6 A& a: `! O) a
Class A .0001" min ; F' k c% ?# X M2 {$ P3 J% YClass B .0002" min 5 `. a# T2 ?; \$ }9 C5 O6 C& iClass C .00032" min .0004" min. for steel. ) _9 o8 t8 \) `# gClass D .0006" min .0008" min. for steel. $ l' q2 p, L, o2 kClass E .0012" min ASTM requires purchaser to supply information, such as base metal, underplating, test requirements and test methods etc. In general, copper alloys containing more than 5% Zn shall have a copper undercoating of at least 0.0001" or nickel undercoating of at least 0.000050". 4 R* W9 X- d0 T0 E* l) XType Matte 0 H4 r: N4 c" N2 e. K' O2 hType Bright 3 a: ?9 e& R+ ?/ T( G
Type Flow- 4 c4 d V1 C) a- Fbrightened ----------- Flow brightening available 4 o# }' ]' d" g最少0.00032 英寸，就是 8微米