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® compliant 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 | ||||||