按照ASTM B545 標準鍍錫，C 類，鍍層厚度是多少？

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請教：按照ASTM   B545  標準鍍錫，C 類，鍍層厚度是多少？

sjhuangjoanna

Spec. Thickness Comment
- V/ j, r. M" z" HASTM-B-
. p# X! ?  F) n$ s# I545-97e1   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".
9 G! u- {% B4 |% p. y3 IClass A .0001" min   
Class B .0002" min   
Class C .00032" min .0004" min. for steel.
7 [: T# k& E$ T8 EClass D .0006" min .0008" min. for steel.
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".
Type Matte   
Type Bright   
Type Flow-
brightened  ----------- Flow brightening available
: F7 @7 L3 D, a& y( {最少0.00032 英寸，就是 8微米