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Date: 24 Sep 2007 00:21:06
From:
Subject: Columbium tubesets
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What quality range of bicycle frame would use a "columbium" tube set?
Apears to be a "niobium" or "columbium" alloy steel - which would be
more corrosion resistant and stronger? than standard high carbon or
high tensile tubes? Also known as "high impact" tubes?????
--
Posted via a free Usenet account from http://www.teranews.com
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Date: 24 Sep 2007 11:48:09
From: * * Chas
Subject: Re: Columbium tubesets
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<clare at snyder.on.ca > wrote in message
news:9ieef3dbf632iqtu3gm7r3bhh4buc3ahat@4ax.com...
> What quality range of bicycle frame would use a "columbium" tube set?
> Apears to be a "niobium" or "columbium" alloy steel - which would be
> more corrosion resistant and stronger? than standard high carbon or
> high tensile tubes? Also known as "high impact" tubes?????
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>
Columbus and other tubing companies have made tubing that contains
Columbium or Niobium. It can used in very small quantities - less than .5%
to improve the strength of steel so that it can be drawn into very thin
wall tubing.
They would generally be light weight better quality (expensive) bikes.
Here's a link (with only a minimal amount of glaring misinformation) that
give a good explanation of steels used for bicycles:
http://www.vendettacycles.com/vendettacycles/steel.htm
Chas.
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Date: 24 Sep 2007 21:54:10
From: jim beam
Subject: Re: Columbium tubesets
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* * Chas wrote:
> <clare at snyder.on.ca> wrote in message
> news:9ieef3dbf632iqtu3gm7r3bhh4buc3ahat@4ax.com...
>> What quality range of bicycle frame would use a "columbium" tube set?
>> Apears to be a "niobium" or "columbium" alloy steel - which would be
>> more corrosion resistant and stronger? than standard high carbon or
>> high tensile tubes? Also known as "high impact" tubes?????
>>
>> --
>> Posted via a free Usenet account from http://www.teranews.com
>>
>
> Columbus and other tubing companies have made tubing that contains
> Columbium or Niobium. It can used in very small quantities - less than .5%
> to improve the strength of steel so that it can be drawn into very thin
> wall tubing.
>
> They would generally be light weight better quality (expensive) bikes.
>
> Here's a link (with only a minimal amount of glaring misinformation) that
> give a good explanation of steels used for bicycles:
>
> http://www.vendettacycles.com/vendettacycles/steel.htm
>
> Chas.
>
>
"improved strength" is a very imprecise way to describe it. the
columbium alone /can/ be used for precipitation hardening, but that's
not what you'd typically do in isolation for tube that you want to draw.
its primary role in this case is to maintain fine grain structure
after brazing. that maintains strength if you will, but doesn't
increase it as such.
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Date: 24 Sep 2007 21:22:21
From:
Subject: Re: Columbium tubesets
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On Mon, 24 Sep 2007 11:48:09 -0700, "* * Chas"
<verktygjunk@aol.spamski.com > wrote:
>
><clare at snyder.on.ca> wrote in message
>news:9ieef3dbf632iqtu3gm7r3bhh4buc3ahat@4ax.com...
>> What quality range of bicycle frame would use a "columbium" tube set?
>> Apears to be a "niobium" or "columbium" alloy steel - which would be
>> more corrosion resistant and stronger? than standard high carbon or
>> high tensile tubes? Also known as "high impact" tubes?????
>>
>> --
>> Posted via a free Usenet account from http://www.teranews.com
>>
>
>Columbus and other tubing companies have made tubing that contains
>Columbium or Niobium. It can used in very small quantities - less than .5%
>to improve the strength of steel so that it can be drawn into very thin
>wall tubing.
>
That was my impression, too. The bike is definitely significantly
lighter than my lugged Raleigh.
>They would generally be light weight better quality (expensive) bikes.
>
>Here's a link (with only a minimal amount of glaring misinformation) that
>give a good explanation of steels used for bicycles:
>
>http://www.vendettacycles.com/vendettacycles/steel.htm
>
>Chas.
>
--
Posted via a free Usenet account from http://www.teranews.com
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Date: 24 Sep 2007 07:51:53
From: M-gineering
Subject: Re: Columbium tubesets
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clare at snyder.on.ca wrote:
> What quality range of bicycle frame would use a "columbium" tube set?
> Apears to be a "niobium" or "columbium" alloy steel - which would be
> more corrosion resistant and stronger? than standard high carbon or
> high tensile tubes? Also known as "high impact" tubes?????
>
a piece of crap, where a salesperson concocts something which sounds
familiar. There would have been no need to if he had specced something
half decent.
--
/Marten
info(apestaartje)m-gineering(punt)nl
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Date: 24 Sep 2007 00:21:54
From: A Muzi
Subject: Re: Columbium tubesets
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clare at snyder.on.ca wrote:
> What quality range of bicycle frame would use a "columbium" tube set?
> Apears to be a "niobium" or "columbium" alloy steel - which would be
> more corrosion resistant and stronger? than standard high carbon or
> high tensile tubes? Also known as "high impact" tubes?????
The Element With Two Names is used as an alloying material in various
steels including many modern steel bike tubes. Corrosion resistance and
impact resistance are not significant factors here, per se. A bicycle
builder may choose among various finishing treatments for corrosion
resistance and may build with various diameters, shapes and gauges of
tube, trading among overall weight, stiffness, aesthetics and dent
resistance.
These questions are much broader than you imply. For a specific frame
model we may be able to comment.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
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Date: 23 Sep 2007 21:38:19
From: jim beam
Subject: Re: Columbium tubesets
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clare at snyder.on.ca wrote:
> What quality range of bicycle frame would use a "columbium" tube set?
> Apears to be a "niobium" or "columbium" alloy steel - which would be
> more corrosion resistant and stronger? than standard high carbon or
> high tensile tubes? Also known as "high impact" tubes?????
>
can you disclose more detail about the tube and where you've seen it?
regarding effect of columbium, iirc, it's primarily used to control
grain size so heat on brazing doesn't cause the steel to lose strength.
it's not typically used in sufficient quantity to have any effect on
corrosion resistance.
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Date: 24 Sep 2007 12:48:14
From:
Subject: Re: Columbium tubesets
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On Sun, 23 Sep 2007 21:38:19 -0700, jim beam
<spamvortex@bad.example.net > wrote:
>clare at snyder.on.ca wrote:
>> What quality range of bicycle frame would use a "columbium" tube set?
>> Apears to be a "niobium" or "columbium" alloy steel - which would be
>> more corrosion resistant and stronger? than standard high carbon or
>> high tensile tubes? Also known as "high impact" tubes?????
>>
>can you disclose more detail about the tube and where you've seen it?
>
>regarding effect of columbium, iirc, it's primarily used to control
>grain size so heat on brazing doesn't cause the steel to lose strength.
> it's not typically used in sufficient quantity to have any effect on
>corrosion resistance.
It's a frame most of you will likely never have seen or heard of.
McKinley Explosiv - made in Canada. I think possibly by Giant. For a
major Canadian sporting goods chain.
--
Posted via a free Usenet account from http://www.teranews.com
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Date: 24 Sep 2007 11:41:21
From: Jambo
Subject: Re: Columbium tubesets
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"jim beam" <spamvortex@bad.example.net > wrote in message
news:Oe2dnbaiBt-homrbnZ2dnUVZ_qelnZ2d@speakeasy.net...
> regarding effect of columbium, iirc, it's primarily used to control grain
> size so heat on brazing doesn't cause the steel to lose strength. it's not
> typically used in sufficient quantity to have any effect on corrosion
> resistance.
Is this memory recall from more than 30 years ago, on a "materials lecture"
that's classified?
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Date: 27 Sep 2007 20:08:09
From: jim beam
Subject: Re: Columbium tubesets
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Jambo wrote:
> "jim beam" <spamvortex@bad.example.net> wrote in message
> news:Oe2dnbaiBt-homrbnZ2dnUVZ_qelnZ2d@speakeasy.net...
>> regarding effect of columbium, iirc, it's primarily used to control grain
>> size so heat on brazing doesn't cause the steel to lose strength. it's not
>> typically used in sufficient quantity to have any effect on corrosion
>> resistance.
>
> Is this memory recall from more than 30 years ago, on a "materials lecture"
> that's classified?
>
>
no, it's from materials experience that's not classified, and which you
can find in a multitude of references. even online, if you'd bothered
to look. moron.
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