Classic & Vintage - hi ten 1020 tubing?
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11-27-07, 09:30 PM
anyone know the lowdown on high tensile 1020 tubing? just picked up a vintage panasaonic with this tubing but seems on the heavy side. how does this tubing add up to columbus sl or reynolds 531? thanks...
11-27-07, 09:33 PM
High tensile anything generally means ordinary grade carbon steel. Weaker then special alloys so more is added, thus heavier. On the bright side it should be easily weldable.
11-27-07, 09:52 PM
There is a considerable weight difference: for example I have a 53 cm lugged frame in Columbus SL that weighs in at 4 pounds bare frame with no fork, bottom bracket or headset. A 53 cm Hi ten lugged frame came in at 7 pounds 2 oz. Don
do you have a pic of the panasonic? I have one too
11-28-07, 07:33 AM
Channeling sydney: Gas pipe.
11-28-07, 07:48 AM
I like Sheldon Brown's glossary entry for high-tensile tubing: "A fancy-sounding name for the ordinary tubing used to build cheap bicycle frames."
11-28-07, 09:16 AM
Back in the day (70s, 80's) when "chromoly" tubing was "nice", steel frame material was identified by its properties (percentage of alloys in the steel).
normal steel: 1020
chromoly steel: 4130
Chrome Molybdenum (sp ?).
The numbers are like the Ti numbers (3-2.5 or 6-4) which also refer to alloying elements in the Ti (pure Ti is best for burning and making into white paint pigment, it's not very good for bike frames). I dunno what the steel numbers actually refer to.
11-28-07, 09:45 AM
Alloying of steels (http://www.materialsengineer.com/E-Alloying-Steels.htm).
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