[mattty]

I have recently been designing and GTAW welding BMX frames. I have noticed that several frame manufacturers off some less expensive frames that use "Hi Ten" as well as a chromoly TT or some combination of those. My question: is it safe to make a prototype for a frame using mild steel for the dropouts? Is there such thing as a hi tensille steel plate or are these manufacturers using mild steel for their dropouts?_

(tired of waiting on the laser cut 4130 ones i have ordered)

 

[Walt]

Yes

Mild steel will work fine for dropouts. I wouldn't use mild or hi-ten tubing if you wanted to actually ride/use the bike, but I guess it depends on what you mean by "prototype".

-Walt

I have recently been designing and GTAW welding BMX frames. I have noticed that several frame manufacturers off some less expensive frames that use "Hi Ten" as well as a chromoly TT or some combination of those. My question: is it safe to make a prototype for a frame using mild steel for the dropouts? Is there such thing as a hi tensille steel plate or are these manufacturers using mild steel for their dropouts?_

(tired of waiting on the laser cut 4130 ones i have ordered)

 

[mattty]

thanks, I have made the rest from 4130, but was just curious as to whether the weld bond would be weaker/ hazardous... i plan on trying taking the "prototype" to the skatepark and trails to see if my other welds hold up as well.

 

[mattty]

it worked out pretty well id say. Only took a half hour to make them with a cutoff wheel too. Thanks

 

[mattty]

aaaand my computer's not showing those pics so:

http://www.freeridesouth.com/pics/showpic.php?image_id=14395&cat=6&order_by=id desc&query=

http://www.freeridesouth.com/pics/showpic.php?image_id=14396&cat=6&order_by=id desc&query=

 

[adam728]

 

[Vlad]

Off topic, but how do you like that rear tire?

 

[mattty]

not good for dirt obviously, but ive been running them for years. Super fast rolling and probably the best choice for tire tappy stuff... an excellent street and park tire

 

[Vlad]

Thanks! I think that's going to be my next rear tire.