GENERAL CHARACTERISTICS

HPP 166 is a premium quality, iron powder low-hydrogen electrode designed for joining construction grade and problem steels. Product features a moisture guard coating to minimize hydrogen embrittlement and underbead cracking. Weldability is excellent on both AC or DC reverse polarity. The first choice for x-ray quality welds featuring high impact resistance.

TYPICAL APPLICATIONS:

Used primarily on carbon and medium tensile steels, especially under conditions of restraint. Excellent for high sulphur and "tramp" steels. Used extensively on construction grades, for shipbuilding, pipelines, boiler plate, cast steel and cryogenic grades.

Welding Parameters

Diameter

3/32"

1/8"

5/32"

3/16"

Amperage

60-100

110-150

140-200

220-280

Current.AC or DC reverse polarity (electrode+)

Technical Data:

Tensile Strength as welded..up to 76,000 PSI

Yield Strength..up to 69,000 PSI

Elongation ......approx. 31-33%

Reduction in Area..75-80%

Procedure: Area to be welded should be clean and free of surface contamination such as rust, scale, grease, etc. On DC, use reverse polarity (electrode +). Preheat of 3000 4500F should be employed with heavy sections and hardenable grades of base metal. For x-ray quality, maintain a short arc gap. On vertical welds, start at bottom and weave slightly while pausing at the edges. For root passes, set a minimum gap (3/32" for 1/8" electrodes) and run stringer beads. For fill and cover passes, a weaving technique is best employed.