Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Old December 30th 19, 06:56 PM posted to rec.crafts.metalworking
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Default ON TOPIC: Welded joints are usually stronger than the surrounding material?

Is that typically true? For example... A typical bike fork weld, where
the two curved fork pieces meet the head tube. If immense pressure were
put on one of the forks, would the fork tube bend before the weld breaks
apart? That is speaking generally, typically.

Thanks.

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Old December 30th 19, 08:03 PM posted to rec.crafts.metalworking
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Default ON TOPIC: Welded joints are usually stronger than the surrounding material?

On Mon, 30 Dec 2019 18:56:10 -0000 (UTC), John Doe
wrote:

Is that typically true? For example... A typical bike fork weld, where
the two curved fork pieces meet the head tube. If immense pressure were
put on one of the forks, would the fork tube bend before the weld breaks
apart? That is speaking generally, typically.

Thanks.


A proper weld is as strong OR stronger than the parent metals.

This assuming no heat treat necessary or one has been done..etc etc.

Gunner
__

"Journalists are extremely rare and shouldn’t be harmed, but propagandists are everywhere and should be hunted for sport"

Yeah..with no bag limit.



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Old December 30th 19, 11:01 PM posted to rec.crafts.metalworking
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Default ON TOPIC: Welded joints are usually stronger than the surrounding material?

"John Doe" wrote in message
...
Is that typically true? For example... A typical bike fork weld,
where
the two curved fork pieces meet the head tube. If immense pressure
were
put on one of the forks, would the fork tube bend before the weld
breaks
apart? That is speaking generally, typically.

Thanks.


Maybe, if the weld beads are sound and thicker than the tubing walls
and the heat doesn't anneal away any of the tubing's added heat
treatment or cold drawing strength, or leave the area next to the weld
brittle. I spent most of a night school welding course welding and
destroying samples until my welds could be bent double without
cracking.


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Old December 31st 19, 04:27 AM posted to rec.crafts.metalworking
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Default ON TOPIC: Welded joints are usually stronger than the surrounding material?

On Mon, 30 Dec 2019 18:56:10 -0000 (UTC), John Doe
wrote:

Is that typically true? For example... A typical bike fork weld, where
the two curved fork pieces meet the head tube. If immense pressure were
put on one of the forks, would the fork tube bend before the weld breaks
apart? That is speaking generally, typically.

Thanks.


I've built a few bike frames and yes, the joint between the front fork
blades and the crown are strong enough that the blades bend rather
than the weld joint breaking.

Traditionally bicycle frames weren't welded together but brazed and
that was strong enough to hold too :-)
--
cheers,

John B.



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