Tin Scrap
TIN SCRAP
Tin and its properties:
It is a silvery-white, non-toxic, soft metal ; normally used by plating it onto other metals such as mild steel (tinplate) .Pure tin is too weak to be used alone for most mechanical applications. It is often alloyed with elements such as copper, antimony, lead, aluminum and zinc to improve mechanical or physical properties.
Uses:
It is commonly used as a coating for other metals such as tin cans, copper cooking utensils. Other applications include die-casting alloys, pewter chemicals, bronze, bearing alloys and solder. Tin is also used in bronze, pewter, and bearing alloy. It is used in making food cans, plating on copper tracks of printed circuit boards.
GRADES OF TIN SCRAPDifferent grades and varieties of tin scrap scrap is used for recycling purposes and to recover pure tin from the scrap. Given in the table below are some of the important grades / types of tin used in recycling.
Grade | Details |
Block Tin | It includes clean tin solids with minimum tin content of 98 %. It should be free of solders, or foreign metals and materials. |
Pewter | It comprises of tin based tableware with minimum tin content of 84 %. This grade may include soda-fountain boxes and cast figurines. |
High Tin Babbit | This grade consists of clean tin based babbit or barring material with minimum tin content of 78 %. |
Solder Dross | Solder Dross shall consists of high tin solder droppings and skimmings from solder etch plating operations. |
Sn / Sb Solder Scrap | Sn / Sb solder scrap contains typical common solder with 60 % tin and 40 % lead content. |
Lead Free Solder Scrap | Lead free solder scrap is tin based with 3-4 % silver and up to 1 % copper content. |
Detining Can Scrap | It contains tin plated steel scrap suitable for detinning. It should be free of bimetal (steel/aluminum cans). The material must be uncompressed and handleable for stripping tanks. |
Other Tin Scrap | It contains any other tin based scrap materials that are not listed in the other grades. |
Reference : http://www.themetalcasting.com/tin-scrap.html