Harris® 170 1/4" X 36" is a copper/zinc/nickel alloy designed for braze welding steel and cast iron. It can also be used for brazing tungsten carbide to steel where higher joining temperature is not objectionable. The addition of nickel to this alloy provides hardness and strength compared to standard bronze alloys. This characteristic makes it ideal for build-up and overlay. This alloy flows easily and deposits can be machined. It can be deposited using oxy-fuel torches. Applications include maintenance, repair and fabrication on steel, copper, copper alloys, nickel and nickel alloys. Ideal for close-fit, strong "sweat" joints, bicycle frames and tubular furniture.
Features
The process is similar to brazing as the base metal is not melted
Unlike brazing the rod must be continually applied as you move down the joint
Focus the flame on the part and heat until a dull red appears, then apply the rod, melting the rod with the flame to deposit a uniform braze layer along joint
Clean the area to be brazed
Apply with a "braze welding" technique
Bevel heavier sections approximately 15 degrees
Flux with bare No. 170 use Harris 17 paste flux
Use a neutral flame preheat and preheat joint
Remove flux residue by wire brushing with hot water
Melting point - 1750°F
Tensile strength - Up to 95,000 psi
Working temperature range - 1700°F to 1800°F
Brinell hardness - 90-100
Uses substantially less filler material than a regular brazing rod
Specifications
AWS A5.8
Applications
Overlays and build-up of gear teeth shafts, bearings, valve seats, pistons and other surfaces subject to wear.
Joining both ferrous and non-ferrous metals
Caution
Keep your head out of the fumes
Use enough ventilation, exhaust at the flame, or both, to keep fumes and gases from your breathing zone and the general area
