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Kapp Tin-Silver Solder Formulations

 

Kapp Alloy & Wire, Inc. manufactures all the ASTM and SAC standard formulations of Tin-Silver and Tin-Silver-Copper solders. These include, but are not limited to:

 

KappZapp™ Tin-Silver solders produce strong, ductile joints on Copper, Brass, and Stainless Steel. The resulting joints have a high tolerance to vibration and stress, with tensile strengths to 33,000 psi on Stainless Steel. The entire line of KappZapp™ solders is NSF® certified Lead-Free for potable water and plumbing applications.

 

 KappFree™ solders are NSF compliant Lead/Cadmium-free formulations designed specifically to replace Lead solders in Copper and Stainless Steel plumbing as well as in electrical/electronic applications. With less Silver, these lower cost solders provide less joint strength, vibration resistance, and thermal cycle fatigue resistance compared to KappZapp™ solders.

 

KappSAC305™ 96.5%Tin-3.0%Silver-0.5%Copper solder is a standard Lead-free formulation designed for circuit board and electronic soldering. Kapp Alloy manufactures all of the various SAC alloys of Tin-Silver-Copper. Call for a quotation and availability of in stock items.

 

Technical Data

Composition (%):

Melting Range:

Tensile Strength (Copper):

Tensile Strength (Stainless):

Shear Strength:

Elongation:

Electrical Conductivity (%IACS):

96.5Sn-3.5Ag (KappZapp3.5™):

Eutectic @ 430°F (221°C)

14,000 psi

25,000 psi

11,600 psi

48%

16.4

96Sn-4Ag (KappZapp4™):

430-475°F (221-246°C)

14,000 psi

28,000 psi

12,000 psi

49%

16.5

95Sn-5Ag (KappZapp5™):

430-490°F (221-254°C)

15,000 psi

29,000 psi

13,000 psi

49%

16.6

94Sn-6Ag (KappZapp6™):

430-535°F (221-279°C)

15,000 psi

30,000 psi

13,500 psi

49%

17.1

93Sn-7Ag (KappZapp7™):

430-570°F (221-299°C)

15,500 psi

31,000 psi

14,000 psi

49%

20.1

95.5Sn-4Cu-0.5Ag (KappFree™):

440-500°F (226-260°C)

10,000 psi

18,000 psi

5,000 psi

48%

24.9

96.5Sn-3.0Ag-0.5Cu (SAC305)

423-428°F (217-220°C)

12,000 psi

21,000 psi

5,000 psi

26%

15.3

Sn = Tin, Ag = Silver, Cu = Copper

 

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