Ultrapure High-Reliability Extruded Solder for
Lead-bearing and Lead-free Alloys
Product Description
For soldering applications which require maximum reliability of solder joints, especially for surface mounted components,
only solder of the highest purity is acceptable. Kester does not make any vague claims of outstanding solder purity.
Complete analysis of Kester bar and wire solders prove that every batch conforms to the strictest quality control standards
in the solder industry.
Maximum Allowed Impurities
Ultrapure meets the requirements of current industry standards for allowable impurity requirements.
Element J-STD-006C Kester Ultrapure Ultra Low Dross
Tin Balance Balance 63.5
Lead 0.070 0.070 Balance
Antimony 0.200 0.200 0.050
Copper 0.080 0.080 0.015
Gold 0.050 0.050 0.002
Aluminum 0.005 0.005 0.002
Cadmium 0.002 0.002 0.001
Zinc 0.003 0.003 0.001
Silver 0.100 0.100 0.050
Bismuth 0.100 0.100 0.020
Arsenic 0.030 0.030 0.020
Iron 0.020 0.020 0.010
Indium 0.100 0.100 0.007
Nickel 0.010 0.010 0.002
Ultrapure will conform to these requirements when purchased directly or through stocking distributors. Kester is the only
manufacturer of Ultrapure quality solder. Ultrapure conforms to the requirements of J-STD-006C formerly QQ-S-571F.
DOD-STD-2000-1A (Soldering Technology, High Quality/High Reliability) states that it is the responsibility of the manufac-
turer to select those materials and processes that will produce acceptable high quality/high reliability products.
Except where otherwise indicated, the component elements in each alloy shall deviate from their nominal mass percent-
age by not > 0.10% of the alloy mass when their nominal percentage is ≤ 1.0%; by not > 0.20% of the alloy mass when
their nominal percentage is > 1.0% to ≤ 5.0% or by not > 0.50% when their nominal percentage is > 5.0%.
Global Headquarters: 800 West Thorndale Avenue, Itasca, IL USA 60143 ■ Phone: +1 800.2.KESTER ■ Fax: +1 630.616.4044
Asia-Pacific Headquarters: 61 Ubi Avenue 1 #06-01 UB Point, Singapore 408941 ■ Phone: +65 6.449.1133 ■ Fax: +65 6.242.9036
European Headquarters: Ganghofer Strasse 45, 82216 Gernlinden, Germany ■ Phone: +49 (0) 8142 4785 0 ■ Fax: +49 (0) 8142 4785 61
Asia Manufacturing: Hengqiao Road, Wujiang Economic Development Zone ■ Suzhou, Jiangsu Province, China 215200 ■ Phone: +86 512.82060807 ■ Fax: +86 512.8206 0808
■ Website: www.kester.com ■
Technical Data Sheet
