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发表于 2010-5-12 15:07:19
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Spec. Thickness Comment
6 q% p, s% d( b( N5 q, _ASTM-B-
# c H( |; `9 o; Z7 \* Q9 |: Y# Q545-97e1 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' n1 O' Q$ ?- f* g* w2 A( r
Class A .0001" min 0 p6 |; X: b$ l' N4 x
Class B .0002" min
7 L: ~/ f* _$ p0 W+ @ dClass C .00032" min .0004" min. for steel. 7 r- |% t" R- o( _' L; b
Class D .0006" min .0008" min. for steel. , H) q6 ^! f) n z5 p
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". $ j4 f7 P0 {8 K n; s( q
Type Matte 9 w3 A- U9 a4 ]7 a8 v
Type Bright 7 G) z! z) Z0 o0 T- k" d
Type Flow-
$ U$ i l, |# B- N8 y/ v& f. Cbrightened ----------- Flow brightening available
1 s, u+ ^4 d4 G8 E$ r5 d: |最少0.00032 英寸，就是 8微米 |
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