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

Select 70S-3NC is free of copper coating, hence the "NC" designator signifying "no copper". This truly premium solid electrode, or "MIG" wire, is intended for gas metal arc welding of carbon steels which require a minimum yield strength of 50,000 psi. There is no copper to vaporize into the welding fume other than the trace amounts within the wire itself.

APPLICATIONS: Select 70S-3NC is ideally suited for welding on carbon steels that are clean or contain only light mill scale. This electrode is versatile enough for welding sheet steel or multi-pass on plate steel in the 55,000-75,000 psi yield strength range. Typical applications would be pipe welding, structural steel, general fabrication and steel buildings.

DIAMETERS: .035", .045", .052", 1/16"

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

WELDING POSITIONS: All Positions

CHARACTERISTICS:

  • Copper-free "MIG" wire with excellent, virtually trouble-free feeding capability and superb welder appeal.
  • Arc transfer that is stable and consistent.
  • Performs well at high wire feed speeds.
TYPICAL MECHANICAL PROPERTIES (CO2)
Ultimate Tensile Strength (psi) 75,900
Yield Strength (psi) 61,200
Percent Elongation 25
CVN (ftlb f) @ 0 °F 77

TYPICAL DEPOSIT COMPOSITION
Wt% C Mn P S Si Cu
  .08 1.20 .008 .010 .54 .04

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
.052" 280-400 270-400 26-32 1/2-1" 325 310 28
1/16" 290-400 175-280 26-37 1/2-1" 340 200 28

OPTIMUM SHORT ARC PARAMETERS
(Argon-25% CO2)
Diam. Amps WFS Volts ESO
.035" 130 245 17 3/8"
.045" 160 150 18 3/8"
.052" 165 140 18 3/8"