按照ASTM B545 標(biāo)準(zhǔn)鍍錫,，C 類,，鍍層厚度是多少,？

105633469

請(qǐng)教：按照ASTM   B545  標(biāo)準(zhǔn)鍍錫，C 類,，鍍層厚度是多少,？

sjhuangjoanna

Spec. Thickness Comment
4 a3 s% B. w. ]" N) `* b$ [ASTM-B-
545-97e1   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".
2 ^: o" B9 a, s) fClass A .0001" min   
Class B .0002" min   
Class C .00032" min .0004" min. for steel.
Class 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".
% x% W+ X# A5 Z. Q, r* J3 p/ P+ qType Matte   
Type Bright   
/ J* m8 D, B: ]( c! pType Flow-
' j) _- D$ K1 Z* S. D9 C' M9 P, W* vbrightened  ----------- Flow brightening available
3 G$ L% z* H# ?; y9 j! \最少0.00032 英寸，就是 8微米