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发表于 2010-5-12 15:07:19
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Spec. Thickness Comment
+ w7 U+ S* `0 Y8 v0 h7 lASTM-B-2 Y# m; @2 s5 j: U' J& v5 N
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".
4 z$ u. J+ X" y3 J1 \Class A .0001" min 2 @- U) K; g. Q
Class B .0002" min
M8 @: T- b' \) f) U! w FClass C .00032" min .0004" min. for steel. % A# C& v& w! q6 w9 o5 k
Class D .0006" min .0008" min. for steel.
% v! ~. v9 |4 O% zClass 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". . f4 `, H- t: g% j/ o
Type Matte . Z- B `, Y: Q# I% \( f5 P
Type Bright ! L) m( T+ _- }9 {1 ^/ p/ Q+ b3 H
Type Flow-7 X# L3 c( \5 \; D8 y7 ]3 ?% N$ n8 Y" e
brightened ----------- Flow brightening available
- d% } b5 A; h. {最少0.00032 英寸，就是 8微米 |
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