On Jan 17, 2009, at 7:47 AM, <billydavid13@comcast.net> wrote:
> Hi all. I know nothing about metallurgy. But perhaps the cheaper
> [thicker?
> heavier?] were easier to work with, more tolerant of heat, etc., esp.
> for a less experienced brazer. I remember when Reynolds introduced 753
> and
> required builders to certify before they could use it. Aelle may have
> been
> a good way to train building staff and not so expensive if they
> botched it.
> I also tend to think that design and execution trump tubing. Billy
> Ketchum
> ; Chicago, IL; USA.
>
It's true that heavier tubing is more tolerant of heat etc. but the difference isn't that great. A normal DB tube had a wall of 0.9/0.6 and
an Aelle tube has a 1.0 wall so it's not really different. And the 753 certification deal I always thought was more a marketing deal to make 753 seem "special." It's just a heat treated 531 and if you use silver you're OK. Phil Brown Failed marketing, unlike Reynolds, in Berkeley, Calif.