Silver is a lustrous white, ductile, malleable metallic element, having the highest thermal and electrical conductivity of the metals. It is widely used in coinage, photography, dental and soldering alloys, electrical contacts, and printed circuits and jewelry. Atomic number 47; atomic weight 107.868; melting point 960.8°C; boiling point 2,212°C; specific gravity 10.50 g / cm^3.
Standard purity is 99.95%. Also available as 99.99% pure, 99.999% pure, and alloyed with copper as Sterling Silver (92.5% Silver, 7.5% Copper) and Coin Silver. Silver is available in sheet, rod, tube, casting pieces, powder and shapes. Many items are in stock or have short fabrication times. Contact us to find out more.
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Buy Silver from Surepure Chemetals
Grades of Silver: Fine Silver, Sterling Silver, and Coin Silver
Surepure Chemetals sells three main grades of silver:
Fine silver and pure silver refer to silver that is at least 99.9% pure silver.
Fine silver meets the MIL-S-13282B Grade A specification.
Sterling silver is an alloy nominally consisting of 92.5% silver and 7.5% copper.
Sterling silver meets the MIL-S-13282B Grade B specification.
Coin silver is an alloy nominally consisting of 90% silver and 10% copper.
Coin silver meets the ASTM B617 specification as well as MIL-S-13282B Grade C.
Properties and Uses of Silver
Silver is a shiny and relatively soft metal.
Of all metals, it is the best electrical and thermal conductor and so is
useful for electronics and electrical contacts.
Because of its electrical conductivity, silver wire is also used to produce high end audio cables.
Surepure sells silver rods that are "screw machine straight", useful for machining.
Silver can be printed onto photovoltaic cells as part of solar panels.
Surepure also sells silver-based chemicals, such as silver nitrate, which can be used in photography.
Silver ASTM Specifications
Surepure Chemetals sells pure silver covered by the ASTM B742 specification for Fine Silver Electrical Contact Fabricated Material.
Harmonized System Export Codes for Silver
The HS code for silver sheet (and other rectangular shapes) is 7106.92.10.00.
The HS code for silver powder is 7106.10.00.00.
The HS code for other shapes of semi-manufactured silver (including silver wire) is 7106.92.50.00.
The HS code for silver nitrate is 2843.21.00.00.
The HS code for other silver-based chemical compounds is 2843.29.01.00.
Surepure Chemetals sells silver wire ranging from 0.001" small diameter wire (smaller than a human hair) up to 1" or larger diameter straight length rods.
We use the term "wire" for smaller diameters that are supplied on a spool or as a coil.
We use the term "rod" when the diameter is large enough that it can be supplied as a straight length.
Surepure Chemetals is a leading provider of stocked pure silver rods as well as coin silver rods.
We stock many diameters and can often ship the same day you order.
Our pure silver rods are typically hard temper straight lengths and are "screw machine straight."
Please contact us if you're looking for a diameter not listed on our website.
Standard thicknesses range from 0.002" to 0.250".
We use the terms "foil," "sheet," and "plate" for shorter cut pieces (usually up to 12" long) that are usually supplied flat. "Foil" is very thin; "Sheet" is a little thicker and is thus a little stronger and bends less; "Plate" is even thicker and is barely pliable.
We use the term "ribbon" for longer pieces that are usually supplied on a spool.
Standard thicknesses range from 0.010" to 0.128".
Standard diameters range from 0.188" to 2.5". "Target," "disc," and "circle" all refer to metal that is flat and round, like a coin.
They are sometimes used as sputtering targets for physical vapor deposition (PVD).
We supply pure silver powder and granules as well as silver-based chemicals.
We use the term "powder" for smaller grain sizes (similar to flour), and
we use the term "granules" for larger grain sizes (similar to granulated sugar).
Pure silver granules are sometimes called "silver casting grain".
"Silver slugs", also known as "silver bullet anodes",
are short cylinders of silver.
They are often used as silver vapor deposition slugs for physical vapor deposition (PVD).
PVD for evaporation slugs involves heating the slug so that the silver vaporizes, transfers in a vacuum or partial vacuum to the substrate (the object that will be coated), and then condenses to form a thin film on the surface.
A similar coating process is electrodeposition, which is used for electroplating.
In electrodeposition, the silver bullet anode and the cathode or substrate are both placed in an electrolytic solution.
Direct current is applied to the anode, which dissolves in the solution and then adheres to the cathode.
Typical slug sizes are 1/4" diameter x 1/4" long and 3/8" diameter x 3/8" long.
Surepure Chemetals can supply made-to-order silver slugs.
Lead time is usually 2 - 3 weeks.
We also have some silver slugs in stock.