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发表于 2010-5-12 15:07:19
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Spec. Thickness Comment 7 C0 T7 w u8 b; h2 {4 d6 o, s
ASTM-B-2 l& e* @% v/ a4 l9 p
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 Q0 ^) F8 a+ s$ u% C( B; T7 d
Class A .0001" min $ o/ V' O. j: E V
Class B .0002" min
' k% n' X/ a9 v9 FClass C .00032" min .0004" min. for steel.
/ T4 x5 ~. N* N% a. PClass D .0006" min .0008" min. for steel. : `1 r( u L1 k3 W
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". `, p; C2 P {( P1 S* R. o
Type Matte
( g. a, B; q/ ^. t5 t0 {Type Bright & d1 \7 m4 n' d$ W% I0 y
Type Flow-2 \: s! H/ t) B" w# s7 p V
brightened ----------- Flow brightening available
4 K9 I% H! S% q- E最少0.00032 英寸，就是 8微米 |
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