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发表于 2010-5-12 15:07:19
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Spec. Thickness Comment % @+ k& R, m3 i0 K7 D5 M. E4 z
ASTM-B-5 Y" c% I- V0 Y. J) r$ W0 [4 b
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". $ W1 w2 u/ Q( e; U
Class A .0001" min , ?" a+ m) Y4 | ?0 Z
Class B .0002" min : s7 ~8 I% P0 ~3 ?9 ~6 K! `! @& v4 J
Class C .00032" min .0004" min. for steel. ' G m; Z) [# M4 }9 \# Q- `( x
Class D .0006" min .0008" min. for steel. $ p( o' B/ R5 G% m1 ?# S
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".
Q" m! f. J7 W- \8 l- h! `Type Matte
7 x2 ?/ ^, {2 J& x# m5 l# y. tType Bright ; o$ i% J2 K/ V2 z3 q1 m
Type Flow-
, v7 L: |' J. \; X) a; Mbrightened ----------- Flow brightening available ( {0 y6 f7 M1 M% n' N' Q+ i
最少0.00032 英寸，就是 8微米 |
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