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
8 s3 `3 d. c, Q. k* IASTM-B-
( [9 S- ~5 ]7 }' c4 {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".
; z* R, q8 g$ l% f& g4 zClass A .0001" min
) T7 f% ~; w6 f/ DClass B .0002" min
Class C .00032" min .0004" min. for steel.
3 V5 \% z" i0 C b, P6 qClass 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".
9 C, C4 b, v; v# QType Matte
Type Bright
Type Flow-
) S3 K& c$ {" z* ~! r$ N) u3 S6 \brightened ----------- Flow brightening available
最少0.00032 英寸，就是 8微米