15
*Phosphor
Bronze “C”—Bare Filler Wire Tungsten
Inert Gas or Carbon Arc Application General
Characteristics A
bare filler material used for TIG and carbon arc brazing and welding.
Typical Applications
Recommended for high strength welds
on phosphor bronze materials. All-State®
Phosphor Bronze “C” can also be
used to join copper and brasses. It is commonly used as an overlay on cast iron
or steel and to join dissimilar
metals. Superior for maintenance repair and fabrication of valve bodies, seats,
bearings, bushings, gears,
propellers, impeller blades and housings. Qualities
Tensile strength
—up to 65,000 psi (45.71 kgs/mm2)
Yield strength
—up to 37,000
psi (26.02 kgs/mm2) Elongation
in 2" —42
to 50% Hardness
—80 to 100 BrineIl (500 kg. load)
Meets specifications—AWS A5.6,
ECuSn-C Procedures
Bare metal must be clean and free of
all moisture. Do not let wire come in contact with moisture as this will cause
porosity. Preheat
copper base metals to 700°F (371°C); phosphor bronze to 450°F (232°C).
In TIG welding, a preheated
base metal should be joined using a water cooled TIG torch. These temperatures
must be maintained during
welding and between passes. No preheat is necessary when applying to thin copper
sections or ferrous metals.
Stringer beads are recommended to help reduce hot-short cracking. Argon, or 75%
helium and 25% argon are
preferred as shielding gases. A mixture gives better penetration on heavy sections.
