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  1. KappZapp3.5A Acid Core 1/16" 10 Foot Tube
    KappZapp3.5A Acid Core 1/16" 10 Foot Tube
    $24.50
    High strength low temp NSF certified (430°F / 221°C) 3.5% Silver solder for Copper, Brass and Stainless electrical/electronic connections - Acid Core 1/16" (1.6mm) diameter x 10 ft in tube. VIEW PRODUCT
  2. KappZapp3.5A Acid Core 1/8" x 1/2 lb spool
    KappZapp3.5A Acid Core 1/8" x 1/2 lb spool
    $39.50
    High strength low temp NSF certified (430°F / 221°C) 3.5% Silver solder for Copper, Brass and Stainless electrical/electronic connections - Acid Core 1/8" (3.2mm) diameter x 1/2 lb spool. VIEW PRODUCT
  3. KappZapp3.5A Acid Core 1/16" x 1/2 lb spool
    KappZapp3.5A Acid Core 1/16" x 1/2 lb spool
    $39.50
    High strength low temp NSF certified (430°F / 221°C) 3.5% Silver solder for Copper, Brass and Stainless electrical/electronic connections - Acid Core 1/16" (1.6mm) diameter x 1/2 lb spool. VIEW PRODUCT
  4. KappZapp3.5A Acid Core 1/8" x 1 lb spool
    KappZapp3.5A Acid Core 1/8" x 1 lb spool
    $59.50
    High strength low temp NSF certified (430°F / 221°C) 3.5% Silver solder for Copper, Brass and Stainless electrical/electronic connections - Acid Core 1/8" (3.2mm) diameter x 1 lb spool. VIEW PRODUCT
  5. KappZapp3.5A Acid Core 1/16" x 1 lb spool
    KappZapp3.5A Acid Core 1/16" x 1 lb spool
    $59.50
    High strength low temp NSF certified (430°F / 221°C) 3.5% Silver solder for Copper, Brass and Stainless electrical/electronic connections -Acid Core 1/16" (1.6mm) diameter x 1 lb spool. VIEW PRODUCT

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KappZapp3.5A™ Tin-Silver acid cored solder is a NSF certified Lead-free eutectic solder that provides a strong and ductile joint with a high tolerance to vibration and stress on Copper, Brass, and Stainless Steel. The tensile strengths may reach 14,000 psi on Copper and 25,000 psi on Stainless Steel. The low eutectic melting temperature of 430°F (221°C) prevents loss of properties and minimizes distortion on thin wires, tabs, and sheets.

 

NSF International certifies that this product complies with NSF/ANSI Standard 372: Drinking Water System Components – Lead Content. Product also Certified to NSF/ANSI 61, Annex G and conforms with Lead content requirements for “Lead-free” plumbing as defined by California, Vermont, Maryland, and Louisiana state laws and the U.S. Safe Drinking Water Act in effect as of January 4, 2014. Weighted average lead content < 0.25%; Solder and flux lead content < 0.20%.

This alloy complies with the European RoHS and REACH directives. No lead, cadmium or mercury used in production.

 

Benefits & Features

KappZapp3.5A’s low melting temperature prevents the loss of properties and minimizes distortion of thin wire, tabs, and sheets. In many instances, a stronger overall assembly exists after joining with KappZapp3.5A™ than with higher temperature Silver brazing alloys, without potential temperature damage to delicate components and parts. This solder melts completely at just 430°F (221°C), minimizing the heat applied to dissimilar metals and thin tubes.

Applications

  • Copper, Brass, and Stainless Steel plumbing, tube, and sheet applications
  • Sensitive circuit boards, thin wire, and instruments
  • Soldering Copper wires to Copper, Brass, and/or Stainless Steel tabs
  • Fabrication, ducting, food containers, storage bins, and cooling coils for refrigerators
  • Food and potable water safe
  • Used throughout the food processing industry for the manufacture and repair of Stainless Steel parts and components
  • Paired with Kapp Comet™ Flux when extra flux is needed
  • Excess flux residue can be removed with warm water, alcohol, or by flushing with warm water
  • Acid-Cored Solders are not recommended for electrical/electronic applications, unless the joint area can be thoroughly cleaned of any residue. Consider KappZappR™ Rosin-Cored Solders for electrical / electronic applications

 

Properties

Composition

Sn (Tin):

96.5%

Ag (Silver):

3.5%

 

Technical Data

Melting Range:

Eutectic @ 430°F (221°C)

Tensile Strength (Copper):

14,000 psi

Tensile Strength (Stainless Steel):

25,000 psi

Shear Strength:

11,600 psi

Elongation:

48%

Electrical Conductivity:

16.4%

Sn=Tin, Ag=Silver

 

Product Variants

KappZapp3.5A™ is available in standard forms:

  • 1/32” (0.031”) (0.8mm)
  • 1/16” (0.063”) (1.6mm)
  • 1/8” (0.125”) (3.2mm)

 

Custom alloys and forms are our specialty. Call a Kapp representative to discuss what size and diameter are right for you.

 

Matching Kapp Comet™ Flux

For most alloys and projects, no additional flux is required when working with KappZapp3.5A™ acid cored solder. Some highly polished Stainless Steel alloys contain more Chromium and Nickel.  These parts may require extra effort to remove the oxide layer by sanding, scratching with a Stainless Steel brush or emory paper, and by the addition of liquid Comet™ Flux.

 

Click here for KappZapp3.5A™ Technical Data Sheet

 

Click here for KappZapp3.5A™ Safety Data Sheet

 

Click here for instructions on how to use KappZapp3.5A™

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