On 06/19/2014 10:30 AM, Ron Mc wrote:
531 is the Reynolds brand name for their first grade of alloy steel (Cr-Mo) high-strength tubing. It came in straight gauge and double butted lengths of different thickness.

http://en.wikipedia.org/wiki/Reynolds_531

"...manganese–molybdenum, medium-carbon steel bicycle tubing... The approximate alloying composition of 531 tubing is 1.5% Mn <http://en.wikipedia.org/wiki/Manganese>, 0.25% Mo <http://en.wikipedia.org/wiki/Molybdenum>, 0.35% C <http://en.wikipedia.org/wiki/Carbon>..."


On Thursday, June 19, 2014 9:23:34 AM UTC-5, Michael wrote:

    So 531 denotes the mixture of metals in it?
    It came in different configurations of butting and wall thicknesses?
    So people may be raving about the wall thickness, not so much
    about the 531-ness itself?

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