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A PREMIUM THIN FLOWING, HIGH STRENGTH, BRAZING ALLOY FOR ALL FERROUS AND NONFERROUS METALS (except the white metals).
Inasmuch as small deposits of this alloy yield very high strengths, it is ideal for maintenance repairs where close fitting joints are desirable, e.g.. Drill bits and drill bit extensions, tubular steel, furniture repairs, milling cutters, broaches, ect. In some applications, it can be used as a substitute for costlier silver brazing alloys.
Features
Tensile strength -- Up to 95,000 psi
Solidus -- 1690°F Liquidus -- 1715°F
Color -- "Silvery" in contrast to bronze rod deposits
The weld area should be thoroughly cleaned. Bevel heavier sections. Utilize a brazing technique with a neutral flame. Work with inner cone apporoximately 1/4" from the metal, while holding the torch at a low angle. For rapid buildup work, the alloy will immediately solidify if the flame is turned upward from the molten metal at the end of each pass. WELCO 17 should be used with bare rods. Flux residue should be removed by wire brushing with hot water.
Applications
The area to be brazed should be clean. Normally this alloy is employed for butt joining with little preparation other than cleaning and grinding of the surfaces. Heavier sections should be appropriately beveled. Use a neutral flame, holding the flame cone close to the joining area. Use WELCO 17 FLUX with bare WELCO 17 alloy (also, in some applications, when using WELCO 17FC, it is advantageous to use additional WELCO 17 FLUX, particularly in "sweating" the alloy into rather large joint areas). Flux residue should be removed by wire brushing with hot water.
