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Tin/lead melts at about 400 deg.F. Force-44 melts at about 600. Silver melts at 1150 to 1350. You need near "red heat" to melt silver solder and at those temperatures, molecular changes are occuring in the steel which are NOT strength-enhancing

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All that the solder does is to hold the barrels into the mono-bloc, it contributes zero to the ability of the assembly to retain and withstand pressure

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As I said earlier, Force-44 solder has a tensile strenth of 28,000, pounds per square inch. Calculate the surface area of the joint and you will find that the total joint strength is FAR in excess of the force generated by ANY rifle cartridge.

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Actually, Force 44 has a MAXIMUM tensile strength of 28,000.
Its true strength, even with a good join may be only HALF that at 14,000.

Also it has been stated more than once that 4-5000 psi tin/lead solder will "do fine" but the writer wants us to do any calculations at 28,000!


This is not meant to be mud-slinging or bickering.
It is just dealing with what has been stated in this thread.

Now to avoid any confusion I'll say this again.

Use any solder you like.

For double rifle barrel to mono join I PREFER silver solder.
Why, because the tiny caress of finger on trigger ignites a 50,000 psi bomb only a couple of inches away from your face.
Think about that and then do your calculations at the 4000 psi strength of tin/lead soft solder.
You may get a shock!

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