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.

GradeDetails
Block TinIt includes clean tin solids with minimum tin content of 98 %. It should be free of solders, or foreign metals and materials.
PewterIt comprises of tin based tableware with minimum tin content of 84 %. This grade may include soda-fountain boxes and cast figurines.
High Tin BabbitThis grade consists of clean tin based babbit or barring material with minimum tin content of 78 %.
Solder DrossSolder Dross shall consists of high tin solder droppings and skimmings from solder etch plating operations.
Sn / Sb Solder ScrapSn / Sb solder scrap contains typical common solder with 60 % tin and 40 % lead content.
Lead Free Solder ScrapLead free solder scrap is tin based with 3-4 % silver and up to 1 % copper content.
Detining Can ScrapIt 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 ScrapIt contains any other tin based scrap materials that are not listed in the other grades.

Reference :  http://www.themetalcasting.com/tin-scrap.html

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