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Lead Free Solder Composition
Several lead free solders have been specified as alternatives for sn/pb alloys used in electronics assembly operations. Qualitek manufactures these alloys to exceed the impurity requirements of
J-STD-006 and all other relevant international standards.
Lead Free Powder
Qualitek manufactures electronic grade solder powders that are available in Type 2 (75-45mm), 3 (45-25mm), 4 (38-20mm), and 5 (25-15mm) J-STD-005 powder distribution. Solder powder distribution is measured utilizing laser diffraction, optical analysis and sieve analysis. Careful control of solder powder manufacturing processes ensures the particle shape is 95% spherical minimum (aspect ration<1.5) and the powder contains a typical maximum oxide level of 80ppm.
Back To Lead Alloys
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Lead Free Alloy Chart
Item |
Alloy |
Melting Range ( oC) |
Form |
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Bar |
Wire |
Paste |
Spheres |
BI58 |
Sn42/Bi58 |
139E |
l |
l |
l |
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LF88* |
Sn87.1/Ag2.0/In10.5/Sb0.4 |
188-197 |
l |
l |
l |
l |
Sn96.5 |
Sn96.5/Ag3.5 |
221E |
l |
l |
l |
l |
Sn95 |
Sn95/Ag5 |
221-245 |
l |
l |
l |
l |
LF955-38 |
Sn95.5/Ag3.8/Cu0.7 |
217-221 |
l |
l |
l |
l |
LF958-35 |
Sn95.8/Ag3.5/Cu0.7 |
217-221 |
l |
l |
l |
l |
LF217 |
Sn95.5/Ag4.0/Cu0.5 |
217-221 |
l |
l |
l |
l |
LF965-30 |
Sn96.5/Ag3.0/Cu0.5 |
217-221 |
l |
l |
l |
l |
Sn99 |
Sn99.3/Cu0.7 |
227E |
l |
l |
l |
l |
Sb5 |
Sn95/Sb5 |
232-240 |
l |
l |
l |
l |
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E-Eutectic |
E-Eutectic |
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LF88* US Patent 5, 435, 857
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