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CLASSIFICATION: E70C-6M per AWS A5.18, ASME SFA 5.18

Select 70C-8 is a carbon steel, composite metal cored electrode for gas-shielded arc welding of carbon steels. This electrode is intended for single and limited multiple pass welding of horizontal fillet and flat position weldments. Select 70C-8 has special deoxidation which makes it very effective when welding over heavy rust, mill scale, oils or other contaminants.

APPLICATIONS: Select 70C-8 is ideal for those difficult-to-weld items such as heavily rusted or scaled surfaces or when steel is coated with oil or paint. This is primarily a single pass electrode if used on clean surfaces due to the high level of deoxidizers. Strength levels and CVN toughness make this electrode well suited to weld both ordinary and fine grained carbon steels such as ASTM A36, A285, A516 Gr 70 and A515 Gr 70.

DIAMETERS: .045", .052", 1/16", 5/64", 7/64", 1/8"

SHIELDING GAS: 75-95% Ar/balance CO2, 40-55 cfh

CHARACTERISTICS:

  • Welds over rust, mill scale, paint and other contaminants.
  • Primarily a single pass electrode with limited multiple pass capability.
  • Good mechanical properties.

    TYPICAL MECHANICAL PROPERTIES
      75% Ar/ 25% CO2
    Ultimate Tensile Strength (psi) 90,000
    Yield Strength (psi) 79,000
    Percent Elongation 26
    CVN (ftlb f) @ -20° F 40

    TYPICAL DEPOSIT COMPOSITION
    Wt% C Mn P S Si
    75 Ar/25 CO2
    .05 1.68 .010 .010 .74

    TYPICAL WELDING PARAMETERS:
      Operating Range Optimum
    Diam. Amps
    (DCEP)
    WFS
    (in/min)
    Volts ESO Amps WFS Volts
    .045" 190-330 240-600 27-33 1/2-3/4" 255 410 29-30
    .052" 220-460 220-620 25-35 1/2-1" 300 350 29-30
    1/16" 240-520 175-500 26-37 3/4-1 1/4" 360 300 29-30
    5/64" 240-550 165-350 27-36 3/4-1 1/4" 420 240 29-30
    7/64" 400-600 110-200 27-34 1-1 1/4" 475 135 29-30
    1/8" 450-625 95-145 26-32 1-1 1/4" 500 100 28-29

    * Welding parameters are for 75% Ar/25% CO2. At higher levels of argon the voltage should be gradually decreased; 1/2-1 volt for 85% Ar/15% CO2, 1-1 1/2 volts for 90% Ar/10% CO2 and 1-2 volts for 95% Ar/5% CO2.

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