Silver

Silver is a very ductile and malleable (slightly harder than gold) monovalent coinage metal with a brilliant white metallic luster that can take a high degree of polish. It has the highest electrical conductivity of all metals, even higher than copper.

Specifications

QQ-S-365
	Type I	Matte
	Type II	Semi-bright
	Type III	Bright
	Grade A	With chromate tarnish resistant treatment
	Grade B	No chromate tarnish resistant treatment / Standard thickness of 0.00050" (500 u") minimum unless otherwise specified
AASTM B 700
	Type 1	99.9% silver min.
	Type 2	99.0% silver min.
	Type 3	98.0% silver min.
	Grade A	Matte
	Grade B	Bright by the use of brighteners
	Grade C	Bright by the use of mechanical or chem polishing
	Grade D	Semibright by the use of addition agents
	Class N	No chromate tarnish resistant treatment
	Class S	With Chromate tarnish resistant treatment  1 um min. (40 u") for short term shelf life solderability  2.5 um min. (100 u") for contact connectors having limited wear  5 um min. (200 u") for thermocompression bonding  10 um min. (400 u") for thermocompression bonding and die attachment for semiconductors  20 um min. (800 um") for high quality domestic flatware  >= 40 um (1588 u) where very severe ware resistance is required

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Materials

Copper Alloy (Non Ferrous)
	BeCu
	Brass
	Phosphorous
	TeCu
	Copper
Nickel Alloy (Ferrous)
	Carbon Steel
	Leaded Steel
	Stainless Steel
	Kovar
	Invar
	Nickel
	Spring Steel
	Molybdenum
	Elkonite