calling all engineers

[bdub]

On this page:

http://gmcmotorhome.homepage.com/1973%20GMC%20Motorhome/1973_GMC05.htm

or (page 5 of 1973 GMC's at:

http://gmcmotorhome.homepage.com/

if the url is scrambled by your email client)

it states frame material as SAE 950 siderails and SAE 1023 channel
cross-members.

Could one of you engineer types translate this for us?

Also, check the number of lugnuts on the wheels in the next to last page.

Thanks

 

[michael g. linderman]

Billy

The wheels look like old Toro 5 lug passenger car wheels.

Mike Linderman
76 Eleganza II
Ft Wayne, Indiana

 

[tom warner]

Billy I am not a metals engineer but remember a little from welding. The
first number designates the type of steel. 10 being plain carbon steel 2
nickel steels, 3 nickel chromium steels etc, the 9 being silcon manganese
steel I believe.

The second number indicates the approximate amount of the predominant alloy,
the last 2 or 3 numbers designates the carbon content.

So my understanding is that SAE 1023 is plain carbon steel, and .23% carbon.
In other words any steel will do for cross members.
have to go to the library and get a American Iron and Steel Institute book
to decode the SAE 950.

Hope this helps a little

>On this page:
>
>http://gmcmotorhome.homepage.com/1973%20GMC%20Motorhome/1973_GMC05.htm
>
>or (page 5 of 1973 GMC's at:
>
>http://gmcmotorhome.homepage.com/
>
> if the url is scrambled by your email client)
>
>it states frame material as SAE 950 siderails and SAE 1023 channel
>cross-members.
>
>Could one of you engineer types translate this for us?
>
>Also, check the number of lugnuts on the wheels in the next to last page.
>
>Thanks
>
>

 

[bdub]

Thanks Tom

It helps a lot.

The question of frame steel quality came up a while back and this just
might be our answer. It'd be nice information to have archived in the FAQ.

bdub

>Billy I am not a metals engineer but remember a little from welding. The
>first number designates the type of steel. 10 being plain carbon steel 2
>nickel steels, 3 nickel chromium steels etc, the 9 being silcon manganese
>steel I believe.
>
>The second number indicates the approximate amount of the predominant alloy,
>the last 2 or 3 numbers designates the carbon content.
>
>So my understanding is that SAE 1023 is plain carbon steel, and .23% carbon.
>In other words any steel will do for cross members.
>have to go to the library and get a American Iron and Steel Institute book
>to decode the SAE 950.
>
>Hope this helps a little
>

> >On this page:
> >
> >http://gmcmotorhome.homepage.com/1973%20GMC%20Motorhome/1973_GMC05.htm
> >
> >or (page 5 of 1973 GMC's at:
> >
> >http://gmcmotorhome.homepage.com/
> >
> > if the url is scrambled by your email client)
> >
> >it states frame material as SAE 950 siderails and SAE 1023 channel
> >cross-members.
> >
> >Could one of you engineer types translate this for us?
> >
> >Also, check the number of lugnuts on the wheels in the next to last page.
> >
> >Thanks
> >
> >