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32 sticks BLUEFIRE ER4047 Aluminum Silicon Brazing Alloy Rods Classic Low Temperature+Aluminum Silicon Brazing Flux Powder 1/2 LB for 4047 Aluminum Based Welding Alloy Rods

4.7 (1) Write Review
Free shipping on orders over $29.99

$30.99

$ 14 .99 $14.99

In Stock
  • Classic is Better:ER4047 is one of the most classic and widely used Aluminum based brazing alloy in the gas welding industry. Also known as “AlSi12", these brazing rods contain 12% silicon and form eutectic structure to achieve better fluidity, lower melting temperature and stronger joint strength. Time Proved Formula for general purpose applications.
  • Superior Material:BLUEFIRE J4047 contains 11-13% Silicon, 0.3% Cu, 0.2% Zn, 0.1% Mg, 0.8% Fe and rest Aluminum. Excellent corrosion resistance and better fluidity than ER4043. Free-flowing with unequaled capillary attraction, ductility and penetration. Solidus Temperature: 1070°F / 577°C. Liquidus Temperature: 1080°F / 582°C. Specific Gravity: 2.66. Due to the relatively high Silicon contents, J4047 provides a bright and beautiful finish joint surface, made it a popular choice for furnishing pro
  • Versatile and Reliable:J4047 is perfect to joining Aluminum to Aluminum, or High-Aluminum Alloys. Due to its stability under high temperature & excellent abrasion resistance, J4047 is especially great for automobile engine block repair, piston and other heat-resistant parts. It is widely used in the home furnishing projects such as window frame, A/C and refrigerators. J4047 is not recommended to braze Aluminum to non-Aluminum alloys such as high-magnesium alloys as the joint maybe brittle.
  • Strong Activity :Removal of oxides on the surface of base material and aluminum brazing rods, removal of oil from the surface of base material.
  • Makes Welding Easy:Reduces the surface tension of the material to be brazed, expands aluminum brazing rods brazing area, and makes welding easier.


The important functions of soldering flux are: assisting heat conduction, clearing the oxide on the surface of parent materials and brazing materials. reducing the surface tension of soldered materials, clearing oil stain on the surface of Soldered materials (parent materials), enlargino brazing area, avaidingre-oxidation etr It ran he divided into solid paste, liquid and gas.


Xiangsheng Qu
Reviewed in the United States on April 26, 2024
Good price, much better price than local venders
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