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All-State®
No. 4 IMP* Premium
Electrode for Welding Thin Sections of Cast Iron AC
or DC Reverse Polarity (Electrode +) - All Position General
Characteristics All-State®
No. 4 IMP is designed to give the ultimate in dense, non-cracking, porosity free
welds on thin cast iron sections
and when the maximum in machinability is required. Typical
Applications Repairing
breaks and cracks in thin sections of cast iron, filling holes and defects in
castings, and building up missing
or worn parts. Qualities
Tensile strength—up to 50,000
psi (35.16 kgs/mm2) Yield
strength—up to 40,000 psi (28.13 kgs/mm2) Elongation
in 2"—2 to 4% Hardness—175
to 225 BrineIl Deposit—magnetic
Color match—good
Procedures Preheat
is not necessary but warming to 400°F (204°C) will produce a softer
and more machinable deposit. All-State®
Chamfer Rod may be used to “V” the joint before welding. Remove all
dirt, grease, and foreign material by
grinding. A medium arc should be used with stringer beads or narrow weave beads.
Peening after each pass will
help to relieve stresses.
