The stuff I used when I built frames was EF45 (Easy-Flo 45% Silver Brazing wire), and I bought it by the (Troy IIRC) ounce.
Brian is correct in referencing the 800-degree Fahrenheit Temp. as the upper limit of soldering - all Engineering texts I've seen reference 800 F as the cutoff. Above that, and below the Temp. where the base metal melts, you're brazin' dude.....
Also IIRC, EF45 flows at about 1150 F (when the steel is a dull cherry color - a beautiful sight).
(It's been awhile...).
Cheers,
Greg Parker
A2 MI USA
> Message: 20
> From: Wdgadd@aol.com
> Date: Tue, 27 Aug 2002 07:43:27 EDT
> Subject: Re: [CR]Silver Solder vs. Silver Braze
> To: RaleighPro531@aol.com, classicrendezvous@bikelist.org
>
> J.W.Harris calls it "silver brazing alloy" or "high silver brazing
> alloy". I usually buy it in one oz.(troy oz., I assume, at 31 gm.) coils,
> 1/16" diameter; about $10. Guys who use a lot buy it in 5 oz. coils.
>
> Best Regards,
> Wes Gadd
> Unionville, Ct