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DESCRIPTION:
Select 78 is a self-shielded, carbon steel, flux cored electrode. It is intended for the welding without a shielding gas of carbon and certain low alloy steels where excellent low temperature toughness is required. A fast freezing slag facilitates welding in all positions. It has a smooth globular transfer, excellent bead shape and easily removed slag. Select 78 is designed for structural applications such as bridge fabrication, ship and barge construction and other general structural fabrication.

CLASSIFICATION & APPROVALS:

  • E71T-8JD-H16 per AWS A5.20, SFA 5.20
  • CWB E491T-8JD-H16
ADVANTAGES:

  • Operates on straight polarity (DCEN) with no external shielding gas.
  • Fast freezing slag facilitates excellent weldability in all positions.
  • Exhibits a smooth globular transfer, minimal spatter and easily removed slag.
  • Excellent low temperature toughness properties.
TYPICAL MECHANICAL PROPERTIES
Ultimate Tensile Strength (psi) 87,000
Yield Strength (psi) 64,000
Percent Elongation 27
CVN (ftlb f) @ -20 ° F 38
                  @ -40 ° F 30

TYPICAL DEPOSIT COMPOSITION
Wt% C Mn Si P S Al
.21 .72 .20 .010 .005 .55

RECOMMENDED WELDING PARAMETERS (DCEN):
Diam. WFS Amps Volts CTWD (in.)
1/16" 120 165 17-18 5/8
  170 200 18-19 3/4
  220 235 20-21 1
  270 270 21-22 1
  320 295 22-23 1
  350 310 23-24 1
5/64" 60 140 16-17 5/8
  100 210 18-19 3/4
  150 255 21-22 1
  200 300 22-23 1
  250 330 23-24 1
  300 360 24-25 1

* These parameters may be used in all positions. The ability to weld out-of-position at the higher current levels will depend on plate thickness and welder skill.

Rev 0(10/08/2014)

Notice: The results reported are based upon testing of the product under controlled laboratory conditions in accordance with American Welding Society Standards. Actual use of the product may produce different results due to varying conditions. An example of such conditions would be electrode size, plate chemistry, environment, weldment design, fabrication methods, welding procedure and service requirements. Thus the results are not guarantees for use in the field.