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

Standard Alloy Chart | Physical Property Alloy Comparison Analysis
 
Lead Free Alloy Chart

Item

Alloy

Melting Range ( oC)

Form

Bar

Wire

Paste

Spheres

BI58

Sn42/Bi58

139E

l

l

l

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

E-Eutectic E-Eutectic

LF88* US Patent 5, 435, 857