1 All-State®
No. 20 *Aluminum
Bronze Electrode for Copper Base and Many Ferrous Metals
DC Reverse Polarity (Electrode +) Flat
and Horizontal Positions General
Characteristics A
versatile electrode used to weld a wide variety of metals. Strong, dense, ductile
and crack free deposits are easily
made with this electrode. These deposits have good resistance to corrosion, salt
water and many acids and
alkalies. Typical
Applications Used
for welding aluminum bronze, manganese bronze, silicon bronze, bronze to steel
and cast iron; ferrous alloys
such as cast iron, malleable iron, galvanized iron and cast iron to steel. All-State®
No. 20 is also used as an overlay
to provide a bearing surface and surfaces resistant to wear and corrosion.
Qualities Tensile
strength —up
to 91,000 psi (63.99 kgs/mm2) Yield
strength —up
to 43,000 psi (30.24 kgs/mm2) Elongation
in 2" —21
to 27% Hardness
—120 to 137 BrineIl (3000 kg.
load) Procedures
Preheat 350°-600°F (177°-316°C)
to permit the use of lower welding amperages. Penetration can be kept to
a minimum by maintaining a short arc
and using a weave technique no more than five times the diameter of
the electrode. Lower amperage can be
used to weld the iron base alloys because of lower heat loss than the
copper base alloys.
