Select 721

Carbon Steel / Flux Cored / Gas Shielded


Features

  • Intended for single and multiple pass welding of carbon steels, such as ASTM A36, A131, and A285
  • Higher argon blends offer lower fume generation rates than shielding with carbon dioxide
  • Developed primarily for Naval shipbuilding applications

Standard Diameters

in (mm)
  • 0.035 (0.9)
  • 0.045 (1.2)
  • 0.052 (1.3)
  • 1/16 (1.6)

Welding Positions

All Positions

Shielding Gas

  • 75-95%Ar/Balance CO₂
    Flow Rate: 40 – 50 CFM

Polarity

Direct Current Electrode Positive (DCEP)

Conformances

  • ASME SFA 5.20
    • E71T-12M-JH4
    • E71T-1M-JH4
    • E71T-9M-JH4
  • AWS A5.20
    • E71T-12M-JH4
    • E71T-1M-H4
    • E71T-9M-JH4
  • AWS A5.36
    • E71T1-M20A2-CS2-H4
    • E71T1-M20A4-CS2-H4
    • E71T1-M21A2-CS2-H4
    • E71T1-M21A4-CS2-H4
  • AWS D1.8
    • 0.045 in (1.2 mm), (90% Ar/10% CO₂)
    • 0.052 in (1.3 mm), (90% Ar/10% CO₂)
    • 1/16 in (1.6 mm), (90% Ar/10% CO₂)
  • Approvals
    Agency Approval Shielding Gas Diameter(s)
    in (mm)
    ABS 3YSA M21 (75% Ar/25% CO₂) 0.045 (1.2) – 1/16 (1.6)
    TYPICAL WELD DEPOSIT CHEMISTRY (WT%)
    Shielding Gas C Mn Ni P S Si
    75% Ar/25% CO₂ 0.05 1.22 0.42 0.011 0.009 0.31
    85% Ar/15% CO₂ 0.06 1.19 0.39 0.005 0.008 0.43
    95% Ar/5% CO₂ 0.06 1.28 0.40 0.005 0.007 0.46
    Typical Mechanical Properties
    Shielding Gas Tensile Strength
    ksi (MPa)
    Yield Strength
    ksi (MPa)
    Elongation
    (%)
    WeldCondition PWHTTemp Charpy V-Notch
    -20 °F ft⋅lb (-29 °C J)
    Charpy V-Notch
    -40 °F ft⋅lb (-40 °C J)
    75%Ar / 25%CO2 87 (601) 77 (533) 28 As-Welded 65 (88) 40 (54)
    85%Ar / 15%CO2 87 (602) 77 (530) 27 As-Welded 109 (148) 75 (102)
    95%Ar / 5%CO2 92 (633) 81 (559) 27 As-Welded 101 (137) 78 (106)

    Packaging (lbs (kg))

    33 (15) Spools, 60 (27.2) Coils, 500 (226.8) Round Drum, 800 (362.9) Hex Drum, 900 (408.2) Hex Drum

    *Some packaging options may not be available depending on diameter and product. Special package options may be available upon request.