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CLASSIFICATION: ER70S-3 per AWS/ANSI A5.18. ASME SFA 5.18

Select 70S-3 is a premium copper-coated, solid electrode, or MIG wire, designed for gas metal arc welding of a wide selection of carbon steels, such as sheet metal, plate and automotive components. This electrode should be used for welding steels in single or multiple pass applications with a yield strength range of 55,000-75,000 psi.

APPLICATIONS: Select 70S-3 is well suited for welding pipe, pressure vessels, steel buildings and sheet steel. The sheet steel applications are varied and include ventilation ductwork, air conditioner compressors and frames, steel furniture and many others. Care should be taken to avoid welding steel which has oil, mill scale or other contaminants.

DIAMETERS: .035", .045"

SHIELDING GASES: 100% CO2, 75-95% Ar/ balance CO2, 95-98% Ar/ balance O2, 30-50 cfh

WELDING POSITIONS: All Positions

CHARACTERISTICS:

  • Exceptional performance.
  • Excellent feedability and welding characteristics.
  • Contains moderate levels of manganese and silicon.
TYPICAL MECHANICAL PROPERTIES (CO2)
Ultimate Tensile Strength (psi) 77,000
Yield Strength (psi) 64,100
Percent Elongation 29
CVN (ftlb f) @ 0 °F 66

TYPICAL DEPOSIT COMPOSITION
Wt% C Mn P S Si Cu
  .08 1.18 .009 .009 .53 .18

TYPICAL SPRAY ARC PARAMETERS (Argon-2% O2):
  Operating Range Optimum
Diam. Amps
(DCEP)
WFS
(in/min)
Volts ESO Amps WFS Volts
.035" 180-240 400-560 24-27 1/2-3/4" 200 475 26
.045" 260-335 300-500 25-30 1/2-1" 300 350 27

OPTIMUM SHORT ARC PARAMETERS
(Argon-25% CO2)
Diam. Amps WFS Volts ESO
.035" 130 245 17 3/8"
.045" 160 150 18 3/8"