Aluminum AL-ZN


INTRODUCTION

Aufhauser ALZN is a self fluxing soldering/brazing alloy for aluminum, zinc base metals and galvanized metal. Ideal for sealing holes in aluminum boats, leaders, gutters, siding, kirksite dies, zinc die castings, antique auto grills, outboard motor castings, carburetors, appliances and automotive hardware. Use where soldering temperatures in excess of 700°F (371°C) can be tolerated. Produces smooth, dense, porosity-free deposits that match the color of zinc die-castings.

APPLICATIONS

  • gutters, leaders, framing, siding
  • kirksite dies, zinc die castings, antique auto grills
  • aluminum hulls, outboard motor castings, carburetors
  • automotive hardware
  • appliances

GENERAL INFORMATION

PHYSICAL and MECHANICAL PROPERTIES
Melting Temperature 720°F (382°C)
Color Match Excellent
Impact Strength 15
Comprehensive Strength 60,000 - 75,000 lbs/sq.in.
Module of Rupture 116,000 lbs/sq.in.
Specific Heat 0.1047 cal/g
Tensile Strength 37,000 psi
Brinell Hardness 100
Specific Gravity 8.7
Flux Self-fluxing on aluminum

 

SPECIFICATIONS MEET OR EXCEED
MIL R-4208

 

STANDARD SIZING
Diameter: 1/8" (3.2mm) x 18" (450mm)
Package: 5 lbs tube, 4 tubes per 20-lbs carton

 

PROCEDURE

Use a steel wire brush to remove all dirt, scale, oxide and plating from the joint area. Bevel thicker sections. On thin sections use a "back-up" plate. Use a neutral flame and incline the torch in the direction of travel. Heat until the flux liquefies. The base metal should be hot enough to let the rod melt, tinning the surface, without being directly exposed to the flame. You should rub the rod on the heated part until the alloy melts and flows. Then expose the rod to the flame and add the alloy drop-by-drop and let it flow. Continue until gap is completely filled. No flux is needed on aluminum, but you should use a stainless steel wire brush to clean the surface. Remove the flux residue with warm water. For TIG welding, use argon gas and AC High Frequency.