[TR] Stainless Steel

[Don Hiscock]

Years ago (perhaps still) there was some video on YouTube showing one of
the Vietnamese workshops making stainless steel bumpers.  It was a bunch of
Geppettos banging them out by hand in a courtyard more than a factory with
machine tooling.

My guess for why the back side is heavily painted is to hide the
handworking marks that are polished out of the front side.

TeriAnn, your 2008 bumpers sound like chrome plated carbon steel, not
polished stainless.  The idea of some amalgam of stainless and carbon
steels to save money doesn't square with the cottage/craft industry that
makes these, AFAIK.

On Sun, May 14, 2023 at 8:50 AM TeriAnn J. Wakeman <tjwakeman at gmail.com>
wrote:

> What is flaking off my bumper as I go over the rust with steel wool is
> about the same thickness as chrome plating.  think the question to ask a
> manufacturer is if the bumper is 100% stainless steel or is it plated on
> the front. And to look at the back to see if it is painted or unpolished
> steel.
>
> TeriAnn
>
> On 5/14/23 5:35 AM, DAVID MASSEY wrote:
>
> They make stainless pots and pans with aluminum inserts.  These are forged
> together using various processes.  It is possible that they are forging
> flat plates of stainless and mild steel and then punching and forming
> bumpers out of that sandwich.  Stainless steel has a reputation of being
> difficult to machine and this may explain why they would go to the trouble
> of forging a thin layer or stainless on a more easily machinable soft steel.
>
> On the other hand, they say "100% stainless steel grade 304 , thickness
> 1.5mm"   If that were the case why paint the inside with three coats of
> paint?  Me thinks they are lying.
>
> Dave
>
>
>
>
> -----Original Message-----
> From: TeriAnn J. Wakeman <tjwakeman at gmail.com> <tjwakeman at gmail.com>
> To: triumphs at autox.team.net
> Sent: Sat, May 13, 2023 8:28 pm
> Subject: Re: [TR] Stainless Steel
>
> On 5/13/23 6:08 PM, stagbytriumph at triumphstagclub.org wrote:
> > Sorry Alex,
> >
> > You may want to do some fact checking.  There is no grade for "solid
> stainless steel".
> >
> > I do not believe a stainless-steel plating exists for plating over mild
> steel technology exists a of
> > yet.
>
> "Welcome to PTT BUMPERS. We are a specialist manufacturing in stainless
> steel bumpers for classic car. Our bumper are made of 100% stainless
> steel grade 304 , thickness 1.5mm and hand polished. The gloss of bumper
> is shiny like mirror polish and the backside of bumper are cover by 3
> painted layers to protect the bumper from the bad weather and chemicals
> elements."
>
> They plate them somehow.
>
>
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