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Re: Why not use 4130

To: <ARDUNDOUG@aol.com>, <land-speed@autox.team.net>,
Subject: Re: Why not use 4130
From: Wester S Potter <wspotter@jps.net>
Date: Wed, 21 Feb 2001 21:40:35 -0800
But as has been mentioned here in the past ... It's your neck, what will be
the best protection for you?

Wes

on 2/21/01 2:51 PM, ARDUNDOUG@aol.com at ARDUNDOUG@aol.com wrote:

> 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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