标题: 按照ASTM B545 标准镀锡，C 类，镀层厚度是多少？ [打印本页] 作者: 105633469 时间: 2010-4-21 13:17 标题: 按照ASTM B545 标准镀锡，C 类，镀层厚度是多少？ 请教：按照ASTM B545 标准镀锡，C 类，镀层厚度是多少？作者: sjhuangjoanna 时间: 2010-5-12 15:07
Spec. Thickness Comment # W7 _; g+ T1 e! \& `) g: w6 eASTM-B- $ [( `+ S' q: |+ p' c8 a7 I2 F545-97e1 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". ! z' A- I5 P& s8 F. P4 ~, [Class A .0001" min 2 E! b k- U7 h$ ^1 O! Y
Class B .0002" min / w& u. R0 W9 U- g6 h4 P5 C) h* N/ ^7 WClass C .00032" min .0004" min. for steel. 8 F9 t( I" I7 T
Class D .0006" min .0008" min. for steel. ' g, c+ t1 u1 T& A- L
Class 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". ' d" u' [3 k' cType Matte + ]3 `5 t+ t: W, N4 n" Y( D
Type Bright * `' N3 p( ~' R1 E5 j& A3 gType Flow- % F3 z7 K3 {. x `brightened ----------- Flow brightening available - I0 c* v. E: q A6 ]2 p4 o/ ?7 ^/ b
最少0.00032 英寸，就是 8微米