This aluminum brazing rod has flux on it and works best on extruded type aluminum, like the alloy 6061. Figure 2 (below) depicts the effect of joint clearance on shear strength of a low-carbon steel joint assembled with silver-based brazing filler metal.. Automotive heat exchangers enable the engine to operate at acceptable temper-atures. Modern Metal Processing uses Controlled Atmosphere Brazing (CAB) as a batch process to braze some aluminum heat exchangers and other mechanical assemblies. 2. Benefits Of Brazing Over Welding. Not always will you *need* to choose to braze over e.g. Aluminium alloys typically melt in the range 560-660°C, while the standard aluminium brazing alloys (based on the Al-Si and Al-Si-Mg systems) melt in the range 520-610°C. Flux is often used : Liquid flux material promotes wetting of the metal parts, which lets the filler flow over them, so they can be joined more easily. Aluminum brazing alloys are used to provide an all-aluminum structure with excellent corrosion resistance and good strength and appearance. However, when joint strength is critical, or when brazing a substantial number of identical assemblies, it helps to calculate the lap length more precisely. One of the most widely used charts in the field of brazing is the strength vs. clearance chart created from work done in the Handy & Harman laboratories in Fairfield, Connecticut back in the 1930's. An aluminum tail light housing with a sizeable hole is brazed with Super Alloy 5 aluminum repair kit and an oxy-MAPP gas torch.Due to the size and thickness of this aluminum part, propane or straight MAPP gas with a trigger start tip could be used just as effectively. Then clean the surfaces using soapy water or a degreaser. I'm thinking about making a patio table to sit 9 people. Position the metal as desired. They proposed that their test would be adopted as a standard procedure for the determination of the shear strength of brazed joints. The bond strength of the 6061-T6 aluminum alloy brazed with Al-12Si, Al-9.6Si-20Cu, and Al-7Si-20Cu-2Sn filer metals at a low temperature of 550°C is evaluated. This aluminum brazing rod has flux on it and works best on extruded type aluminum, like the alloy 6061. Two months ago David Picchiuto did a video and article about making a coffee table with lift top and aluminium legs. When most talk about strength, they are talking ultimate or yield strength . strength of brazed joints using shear specimens acte upon by a pull type load. The bond strength of the 6061-T6 aluminum alloy brazed with Al-12Si, Al-9.6Si-20Cu, and Al-7Si-20Cu-2Sn filer metals at a low temperature of 550°C is evaluated. For filler materials to be brazed using vacuum brazing or atmosphere brazing in the absence of mineral flux, the clearance may be less than 0.002" (0.051mm). These alloys are used for welding and brazing filler materials and for sand and die castings. This chart is shown below, in Fig. Bronze Brazing & Welding Rods. Not always will you *need* to choose to braze over e.g. The CAB process uses an inert gas, mostly Nitrogen, for the gas environment to ensure superior joint strength. I'd like the frame to be relatively light weight, so I don't want to use wood.