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Technical Data Sheet
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
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Phone: +1 800.2.KESTER
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Fax: +1 630.616.4044
Asia-Pacific Headquarters: 61 Ubi Avenue 1 #06-01 UB Point, Singapore 408941
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Phone: +65 6.449.1133
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Fax: +65 6.242.9036
European Headquarters: Ganghofer Strasse 45, 82216 Gernlinden, Germany
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Phone: +49 (0) 8142 4785 0
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Fax: +49 (0) 8142 4785 61
Asia Manufacturing: Hengqiao Road, Wujiang Economic Development Zone
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Suzhou, Jiangsu Province, China 215200
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Phone: +86 512.82060807
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Fax: +86 512.8206 0808
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Website: www.kester.com
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Application Notes
Available Alloys
Ultrapure meets the requirements of current industry standards for allowable impurity requirements. Below is a list of
typical leaded and lead-free alloys produced by Kester in bar and wire form. Other alloys can be produced and follow the
same requirements.
Leaded Alloys
Sn62Pb36Ag2
Sn63Pb37
Sn60Pb40
Sn10Pb88Ag2
Sn5Pb92.5Ag2.5
Lead-Free Alloys
Sn96.5Ag3.0Cu0.5
Sn96.5Ag3.5
Sn97Ag3
K100LD
Sn99.3Cu0.7
Sn100
Sn95Sb5
Melting Point
179-183°C (354-361°F)
183°C (361°F)
183-190°C (361-374°F)
268-299°C (514-570°F)
280°C (536°F)
Melting Point
217-220°C (423-428°F)
221°C (430°F)
221-224°C (430-435°F)
~227°C (441°F)
227°C (441°F)
232°C (450°F)
232-240°C (450-464°F)
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Storage, Handling and Shelf Life
Kester bar and wire solder has an indefinite shelf life when stored in a dry, non-corrosive environment. The surface may
lose its shine and appear a dull shade of gray. This is a surface phenomenon and is not detrimental to product functional-
ity.
Flux-cored solder wires with alloys containing more than 70% lead have a 2 year warranty from the date of manufacture.
All other alloys have a 3 year warranty from the date of manufacture.
Health and Safety
This product, during handling or use, may be hazardous to your health or the environment. Read the Safety Data Sheet
(SDS) and warning label before using this product.
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
■
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