The statement
<snip>
They are
not intended for quenching and tempering. Where these steels are used for
fabrication by welding, no preheat or postheat is required.
<snip>
States they are NOT intended for heat treat and when welded no special
attention is needed.
However this comment suggests "excessive heat will weaken it"
<snip>
Per 1948/49 Willys Mechanics Manual:
--
Straightening Frame
In case the bending or twisting of the frame is not excessive, it may
be straightened. This should be done cold, as excessive heat applied
to the frame will weaken it. For this reason it is recommended that
badly damaged frame parts be replaced.
<snip>
I might do some reinforcing in the area. Just remember these frames are
ladders and made to flex some.
Ric -.
Toledo, Ohio
Home of the World Famous JeepR
1948 - CJ2A L134 - #149488 - Mighty Mo
1948 - CJ2A L134 - #156174 - Ole Blue
1948 - CJ2A 225 V6 - #184134 - Willy
1950 - T3-C - #16517 Bantam Trailer.
1953 - CJ3A L134 453-GB1-18612
1963-5? - Wagoneer
1982 - M416 - Still 24 Volt
1989 - XJ - Cherokee Laredo -4.0L
2004 - Dodge Durango 4x4 w/car trailer - WRV(tm) - Willys Recovery Vehicle
Never Forget September 11, 2001
Freedom isn't free
<>
**
** Constants Aren't ****
** Variables Won't ****
**
_____
From: WillysTech@... [mailto:WillysTech@...] On
Behalf Of Tony G
Sent: Monday, September 24, 2007 9:40 AM
To: WillysTech@...
Subject: Re: [WT] CJ2a Chassis ... is it heat treated ?
SAE 950 is a high strength low alloy steel HSLA for short used in the
auto industry for chassis and bumpers , GMC truck chassis for example
From <>
ia.com/~eagle/faq.html
SAE 950 is a high strength, low allow steel. Here are some details:
This type of steel has enhanced
mechanical properties and, in most cases, good resistance to
atmospheric corrosion are obtained by the
addition of moderate amounts of one or more alloying elements other
than carbon. Steels of this type are
normally furnished in the hot rolled or annealed condition to minimum
mechanical properties. They are
not intended for quenching and tempering. Where these steels are used
for fabrication by welding, no
preheat or postheat is required. These steels may be obtained in the
standard shapes or forms normally
available in carbon steel. This steel has a high strength-to -weight
ratio. Typical applications are
automotive bumper face bars, truck bodies, frames and structural
members.
Properties: (for material thickness up to 1/2")
Minimum yield point: 50,000 psi
Minimum tensile strength: 70,000 psi
Info from Machinery's Handbook. (Larry Price 12-30-99)
BUT IT STILL DOESNT SAY IF ITS HEAT TREATED
Can any auto engineers shed light on this ?
Regards
Tony G
Jakarta , Indonesia
--- In WillysTech@yahoogro <mailto:WillysTech%40yahoogroups.com> ups.com,
John Wickersham <johnwick@...>
wrote:
Somewhere in a Willys manual (I forget where) I remember it warning
about over-heating the frame when making repairs. It described the
danger as "taking the life out of the metal." Does that suggest
anything about the nature of the steel being used?
Pineneedle
Tony G <tonyg@...> wrote:
Thanks all
SAE950
This is what I found on
<>
tips.com/viewthread.cfm?qid=145184&page=1
"950 is the old designation according to SAE J1392. The new
designation is 340 according to SAE J2340. The UTS is specified to
be a minimum of 410 MPa. n-value is not a requirement of this
standard, and its value will change with strain. The following
presentation from US Steel shows some data for HSLA 340 steel:
<>
l.org/AM/Template.cfm?
Section=Home&TEMPLATE=/CM/ContentDisplay.cfm&CONTENTFILEID=971
"
I tried filing the steel and I got to say I think there is some
form
of mild heat treatment , I haven't digested the above onfo yet
Regards
Tony G
Jakarta , Indonesia
--- In WillysTech@yahoogro <mailto:WillysTech%40yahoogroups.com> ups.com,
John Barrett <jbarrettII@>
wrote:
Tony,
Good to hear from you again. You don't seem to make it to this
site
much
anymore.
I don't believe that the frame is heat treated. If it was nobody
would
be able to do any welding or repairs on them without creating
weak
spots. You should be just fine with the work you've done.
However,
if
I'm wrong David and Landen will let us both know about it. ;-)
BTW: what happened to the pictures section of your Java Jeep web
site?
It seems to have gone away.
John
'56 Pickup TKER TOY
Cherry Valley, Calif.
Tony G wrote:
Dear WTers
I am doing a long overdue rebuild of FrankenJeep , my CJ2a / MB
conglomeration
The left hand front part of the chassis had a twist and a bend
in
it
which wouldn't come right with a hydraulic ram only and we had
a
heat
up a small 6 inch section of chassis (where it kicks up from the
horizontal near where the clutch would sit) to get it to the
right
position
The question is ... is the chassis heat treated in anyway ?
If yes how can I restore heat treatment to that section on the
chassis ?
Regards
Tony G
Jakarta , Indonesia
