In a message dated 02/21/2001 11:46:09 AM Pacific Standard Time,
og_1leg@hotmail.com writes:
<< Why does the rulebook recommend Mild steel and not 4130? I know 4130 is
more
diffacult to weld, but I would think if you had a welder that could weld it
right 4130 would be stronger.
_________________________________________________________________
>>
Jerry,
My read on the subject is that, as you said, chrome moly is more
difficult to weld properly than mild steel. Most welders can do a pretty good
with MS but far fewer can do a good job with CM.
Up until a few years ago SCTA gave no extra credence to CM over MS,
requiring the wall thickness to be the same whether using one or another.
Sometime in the past 5 years or so the specs were changed, allowing
thinner wall CM tube to be used as an alternative to the heavier MS tube.
Ardun Doug King
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