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发表于 2010-5-12 15:07:19
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Spec. Thickness Comment
0 E7 P& h( u% l8 VASTM-B-
3 Y. c9 W0 Q' I545-97e1 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". ) W0 p6 x2 u$ S/ a" G9 F' L. Y$ W
Class A .0001" min 7 b% z% Q8 ?+ {; s% F3 [& U0 G* G( A
Class B .0002" min 1 p1 N3 i. \+ K. M' S# L( i$ b
Class C .00032" min .0004" min. for steel.
' z- T. T8 E$ t, i- U4 qClass D .0006" min .0008" min. for steel.
3 }1 m2 G1 H! nClass 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". 5 a, A, s3 Y# ?- |1 u
Type Matte
" Y: J9 Z. i( U7 L$ U5 ^Type Bright ' h& A9 k. x7 D8 O
Type Flow-% [: Y+ _$ ?6 O0 \7 b- R
brightened ----------- Flow brightening available
' V: A; F0 Z, S最少0.00032 英寸，就是 8微米 |
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