按照ASTM B545 标准镀锡，C 类，镀层厚度是多少？

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请教：按照ASTM   B545  标准镀锡，C 类，镀层厚度是多少？

sjhuangjoanna

Spec. Thickness Comment
ASTM-B-
7 t1 C1 W$ P. N! E# 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".
+ ^" f0 e; l& l4 H0 ]9 Y8 Q7 DClass A .0001" min   
3 O( f: ]( F/ ^6 d1 {$ NClass B .0002" min   
Class C .00032" min .0004" min. for steel.
Class D .0006" min .0008" min. for steel.
/ o, N  `3 P' Y+ ~1 m' r! TClass 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".
& g3 I, ^4 L% `. }9 zType Matte   
4 Z8 j3 E3 r8 W' wType Bright   
Type Flow-
brightened  ----------- Flow brightening available
最少0.00032 英寸，就是 8微米