Your question: Why are bike frames brazed instead of welded?

“Traditionally frames have always been brazed not because a weld would fail but because the tube would fail right next to the weld due to the tube being very thin. Many bicycle tubes are heat treated to strengthen them.

Should a bicycle frame be brazed or welded together?

With modern materials and skilled fabricators there’s no functional difference. When done right, both welding and brazing are stronger than the metals they’re joining, meaning the tube should fail before the joint. For most it’s a question of aesthetics and price.

Which is better brazing or welding?

Brazing soundly beats welding when joining dissimilar metals. As long as the filler material is metallurgically compatible with both base metals and melts at a lower temperature, brazing can create strong joints with barely any alteration of the base metals’ properties.

Can you braze a bike frame?

Brass and bronze brazing alloys typically melt at temperatures over 1500F, sometimes as high as 2000F. … It produces joints that are more than strong enough for a bicycle frame, it costs much less than silver, and it is a more forgiving process, allowing wider tolerances in tube mitering and temperature control.

Can bike frames be welded?

While we won’t say you can’t MIG or Stick weld a bike frame together, most bicycles use a combination of brazing and TIG welding for their construction. … Because welding a bicycle frame requires a lot of control over your heat, a task that’s more easily accomplished with a TIG welding pedal.

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Is brazing as strong as TIG welding?

TIG welding is one of the best processes for making permanent joints between two materials, creating a stronger bond when compared with brazing.

Is MAP gas hot enough for brazing?

Genuine MAPP gas can be used in combination with oxygen for heating, soldering, brazing and even welding because of its high flame temperature of 2925 °C (5300 °F) in oxygen.

What are the disadvantages of brazing?

Disadvantages of Brazing Include:

  • Producing lower strength joints compared to welding.
  • Producing joints that are not as well suited to high-temperature applications as welds.
  • Fluxes may contain toxic components.

Can I use a propane torch to braze?

Brazing permanently joins two metals using a torch. You can use a propane torch to braze most metals you want to join. Propane torches are widely available in your local hardware stores, plumbing supply houses as well as at metalsmith and jewelry supply companies.

How strong are brazed joints?

When brazing steel or other ferrous metals, joint strength over 70,000 psi can be achieved under the right conditions. Keep in mind that braze joints are primarily lap type joints, so strength is a combination of tensile and shear.