Select 720 Low Mn

Carbon Steel / Flux Cored / Gas Shielded

Resources

Features

  • Superb weldability, designed for ease of welding in all positions
  • Total manganese (Mn) content is significantly reduced compared to standard E71T-1/-9 electrodes.
  • Mechanical properties meet industry requirements and exceed competitive low manganese type wires of same AWS classification.
  • Intended for use with 75-85% Ar/balance CO₂ shielding gas.
  • Excels in general fabrication, structural steel, and shipbuilding applications where ASTM A36, A515-gr 70, and A516-gr 70 type materials are being used.

Standard Diameters

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

Welding Positions

All Positions

Shielding

  • 75-85% Ar / Balance CO₂
    Flow Rate: 40 – 50 CFM

Polarity

Direct Current Electrode Positive (DCEP)

Conformances

  • ASME SFA 5.20
    • E71T-1M
    • E71T-9M
  • AWS A5.20
    • E71T-1M
    • E71T-9M
  • AWS A5.36
    • E71T1-M20A2-CS1
    • E71T1-M21A2-CS1
    • Approvals
    Agency Approval Shielding Gas Diameter(s)
    in (mm)
    CWB E491T1-GA3-CS1-H8 G (Gas Mixture*) 0.045 (1.2) – 1/16 (1.6)
    CWB E491T1-M20A3-CS1-H8 M20 (85% Ar/15% CO₂) 0.045 (1.2) – 1/16 (1.6)
    CWB E491T1-M21A3-CS1-H8 M21 (75% Ar/25% CO₂) 0.045 (1.2) – 1/16 (1.6)
    TYPICAL WELD DEPOSIT CHEMISTRY (WT%)
    Shielding Gas C Cr Cu Mn Mo Ni P S Si V
    75% Ar/25% CO₂ 0.05 0.06 0.29 0.50 0.00 0.45 0.004 0.010 0.56 0.02
    85% Ar/15% CO₂ 0.05 0.04 0.26 0.55 0.00 0.46 0.008 0.010 0.61 0.02
    Typical Mechanical Properties
    Shielding Gas Tensile Strength
    ksi (MPa)    		 Yield Strength
    ksi (MPa)    		 Elongation
    (%)    		 WeldCondition PWHTTemp Charpy V-Notch
    0 °F ft⋅lb (-18 °C J)    		 Charpy V-Notch
    -20 °F ft⋅lb (-29 °C J)
    75%Ar / 25%CO2 81 (559) 70 (483) 28 As-Welded – 97 (132) 53 (72)
    85%Ar / 15%CO2 89 (614) 77 (531) 24 As-Welded – 53 (72) 36 (49)
    Recomended Welding Parameters
    Diameter
    in (mm)    		 Shielding Gas Position Wire Feed Speed
    in/min (m/min)    		 Amps Volts Contact Tip to Work Distance
    in (mm)
    0.045 (1.2) 75% Ar/25% CO₂ All Positions 200 (5.1) 145 23 1/2 – 5/8 (13 – 16)
    0.045 (1.2) 75% Ar/25% CO₂ All Positions 235 (6.0) 160 24 1/2 – 5/8 (13 – 16)
    0.045 (1.2) 75% Ar/25% CO₂ All Positions 300 (7.6) 185 26 1/2 – 5/8 (13 – 16)
    0.045 (1.2) 75% Ar/25% CO₂ Flat & Horizontal 375 (9.5) 215 27 5/8 – 3/4 (16 – 19)
    0.045 (1.2) 75% Ar/25% CO₂ Flat & Horizontal 440 (11.2) 235 29 5/8 – 3/4 (16 – 19)
    0.052 (1.3) 75% Ar/25% CO₂ All Positions 170 (4.3) 155 23 5/8 – 3/4 (16 – 19)
    0.052 (1.3) 75% Ar/25% CO₂ All Positions 200 (5.1) 175 24 5/8 – 3/4 (16 – 19)
    0.052 (1.3) 75% Ar/25% CO₂ All Positions 250 (6.4) 225 26 5/8 – 3/4 (16 – 19)
    0.052 (1.3) 75% Ar/25% CO₂ Flat & Horizontal 310 (7.9) 250 27 3/4 – 1 (19 – 25)
    0.052 (1.3) 75% Ar/25% CO₂ Flat & Horizontal 395 (10.0) 280 29 3/4 – 1 (19 – 25)
    1/16 (1.6) 75% Ar/25% CO₂ All Positions 125 (3.2) 165 23 5/8 – 3/4 (16 – 19)
    1/16 (1.6) 75% Ar/25% CO₂ All Positions 150 (3.8) 195 24 5/8 – 3/4 (16 – 19)
    1/16 (1.6) 75% Ar/25% CO₂ All Positions 185 (4.7) 225 26 5/8 – 3/4 (16 – 19)
    1/16 (1.6) 75% Ar/25% CO₂ Flat & Horizontal 265 (6.7) 280 27 3/4 – 1 (19 – 25)
    1/16 (1.6) 75% Ar/25% CO₂ Flat & Horizontal 325 (8.3) 320 29 3/4 – 1 (19 – 25)

    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.