Keystone Corporation offers both Matte and Bright Tin electroplate for Rack and Barrel applications. Keystone’s tin plating has been used in countless military, aerospace, commercial, telecommunications, electronics and food service applications. 

Keystone Corporation’s tin plating offers excellent solderability and ductility, as well as a long solderability shelf life. Tin plating enhances the solderability of substrates that are not otherwise easily soldered.  Tin is not easily oxidized in air and has good conductivity. Tin plating is corrosion resistant, is generally considered to be non-toxic and non-carcinogenic, and is approved for food contact applications. 


Parts finished with Bright tin have a shiny, aesthetically pleasing surface finish with a high degree of luster. Bright Tin also provides a lower coefficient of friction for mating with other parts, circuit boards and connectors as compared to Matte Tin. Bright Tin has a smaller grain size than Matte Tin (1-9 um diameter for Matte versus the sub-micron range of 0.1 um for Bright). The smaller grain size presents a more uniform surface for reflecting light, giving a shiny appearance.



Matte deposits are free of co-deposited brighteners found in bright tin plating. Matte tin plated parts are better suited for solder reflow processes and suffer less stress effects from elevated temperatures. Matte Tin will also retain its original color under high temperatures, compared with Bright Tin. Matte Tin plating is suitable for lead-free reflow solder processes which have higher temperatures, typically in the range of 250C – 260C.



Keystone Corporation’s Tin Plating meets the following specifications: 

  • ASTM B545 - Classes A, B, C, D,& E
  • MIL-T-10727 - Classes A, B, C, D,& E
  • AMS 2408
  • Commercial and customer specific specifications



For more than 90 years, Keystone Corporation has assisted customers in completing commercial orders ranging from a few specialized pieces to high volume applications. All finishes are available for both Rack and Barrel plating applications. We maintain superior quality control through the entire finishing process, ensuring top quality Tin plating at an affordable cost for any project.  Contact Keystone today to receive a personalized quotation based on your specific requirements.

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