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All-State®
No. 7 Low
Temperature Solder for Cast Iron and Other Metals Torch
Application General
Characteristics All-State®
No. 7 is a special solder for cast iron and other metals such as steel, copper,
brass, and bronze. Its low
temperature prevents stresses in critical components yet pressures as high as
1,000 psi (.70 kgs/mm2) can be
maintained without failure. Typical
Applications Ideal
for filling, sealing, and repairing cracks, blow holes, and imperfections in cast
iron. It will work equally well on
most ferrous and nonferrous metals with the exception of the white metals. Widely
used for sealing after fusion welding
and for repairing minor machining errors. Compressor housings, water jackets,
motor blocks, and gear cases
are commonly repaired with All-State®
No. 7. Qualities
Hydraulic pressures
—1,000 psi (.70 kgs/mm2)
Working temperatures
—450°-600°F (232°-316°C)
Procedures Remove
all foreign material from joint area by grinding, filing, or sand blasting. Vee
out cracks 45 to 60 degrees. Heat
base metals until All-State® No. 7 powdered
flux melts on contact. Rub All-State®
No. 7 solder on heated surface
until complete tinning or bond is made. Tinning may be improved by wire brushing
or using steel wool. Do not
let open flame come in contact with flux or alloy. To repair a large break or
hole in cast iron merely cut a piece of
steel, copper or brass to adequately cover the area, tin surfaces of both metals,
clamp or hold in position and heat
to approximately 600°F (316°C). Allow to cool slowly, remove flux residue
with hot water and brush.
