Solder as I understand it.

There is what we call plain "Silver Soldering", what people in other parts of the world call high temp silver soldering, or silver brazing - red heat or a bit higher - from 75,000 to 90,000PSI shear on a 1 mil bond, or so my Dad taught me.

There are also different makes of silver solders in varying degrees of strength and fluidity. Some, as used for soldering on the carbide teeth on lumber mill circular saws, need more head but are the strongest of silver solders - usually a square rod about 10" long. The silver wire sold by Praxair, here in town, is really nice to use as it flows beautifully into every fluxed area.

Long after we became fairly proficient at Silver Soldering, a low temp silver solder became available and thus we called it low temp silver solder - it is usually around 5% silver content & has no lead in it's matrix -400 to 500 or so degrees - It's 1 mil bond is stronger than lead solder.

There is lead soldering which usually is a lead/tin amalgamation, 50/50 to 70/30 - 450 to 550 degrees?

Seems to me that High Force or Force 44 are low temp silver solders, with 5% silver content?