標(biāo)題: 按照ASTM B545 標(biāo)準(zhǔn)鍍錫，C 類，鍍層厚度是多少？ [打印本頁] 作者: 105633469 時間: 2010-4-21 13:17 標(biāo)題: 按照ASTM B545 標(biāo)準(zhǔn)鍍錫，C 類，鍍層厚度是多少？ 請教：按照ASTM B545 標(biāo)準(zhǔn)鍍錫，C 類，鍍層厚度是多少？作者: sjhuangjoanna 時間: 2010-5-12 15:07
Spec. Thickness Comment 5 [$ i c' j# u+ X9 ?ASTM-B- ( h; {: v* O$ c) n' d' R: N545-97e1 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". ( Q, f' D; S$ g- W3 }! G
Class A .0001" min $ y8 t: L1 w2 b! j
Class B .0002" min % s; c+ {4 I* ^$ A$ z
Class C .00032" min .0004" min. for steel. , R% [3 _" Z# O3 ~0 Y# G' @& \
Class D .0006" min .0008" min. for steel. ' W- V; L3 O; d; I8 T, V
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". : I0 q' ~( M+ Y4 BType Matte , ?/ |# y* B7 r9 N; K% ?4 n
Type Bright & C. ^, ~; Q% y: v. k3 |' D, TType Flow- * v$ E" C7 ^9 i2 W/ J, Ebrightened ----------- Flow brightening available . F0 B6 \/ G: T
最少0.00032 英寸，就是 8微米