Originally Posted By: GLS

Back to the rib on the 37R. At what temp is solder applied versus hot blue temps.? Is there a danger to the rib if hotblued or is it an oft repeated urban legend? Gil


Although there are some soft solders that melt at the 360-370 degree F temperatures which may be used in hot blue tanks, the more common problem is the corrosion of the solder joint from the salts that get into tiny voids. This corrosion will adversely affect even higher temp solders. If you can rinse and neutralize all of the salts, no problem. But that may not be possible when salts get into the voids between double shotgun barrels and ribs. 370 degrees F isn't typically used for hot bluing, but a gunsmith may increase the bath to that temperature, or even a bit higher, in order to get a deep blue on actions or receivers with a high nickel content.


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