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Submerged Arc Family

Diameters / Packaging

Diameters
 50 lb Bag
Flux ED019587

Lincolnweld® 781™

Submerged Arc Welding (SAW)

700 Series Active Flux

Diameter

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  • Flux

Package

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  • 50 lb Bag

DETAILS

Feature.Products.PDP.DetailsMain.Features

  • Features fast follow characteristics that allow for uniform welds at high speeds without undercut or voids
  • Recommended for high speed, limited pass welding on clean plate and sheet steel
  • Good wetting action
  • Actual (Type 3.1) certificates for each lot of flux showing chemical composition, particle size and moisture level are available in the certificate center of lincolnelectric.com
  • Mild Steel Lincolnweld® L-50®, L-60, and L-61® Low Alloy Steel Lincolnweld® L-70

Feature.Products.PDP.DetailsMain.TypicalApplications

  • Single pass welding – on clean plate and sheet metal up to 4.8 mm (3/16 in) in thickness
  • Hot water tanks, metal buildings and other applications requiring high speed welds

Feature.Products.PDP.DetailsMain.SpecialFeatures

  • Basicity Index: 0.8 Density: 1.5 g/cm3

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Lincolnweld® 780® Submerged Arc (SAW) Flux

ED019586
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BEFORE USE, READ AND UNDERSTAND THE SAFETY DATA SHEET (SDS) FOR THIS PRODUCT AND SPECIFIC INFORMATION PRINTED ON THE PRODUCT CONTAINER. SDS Search page

MECHANICAL PROPERTIES

Wire Classification Postweld Heat Treatment Yield Strength @ 0.2% Offset
MPa (ksi) 		Tensile Strength
MPa (ksi) 		Elongation
% 		Charpy V-Notch
J (ft-lbs) @ -20°C (0°F)
Lincolnweld® L-50® F7A0-EM13K-H8 As-welded 530 (76) 630 (92) 27 73 (54)
Lincolnweld® L-60 F7A0-EL12 As-welded 420 (60) 520 (75) 31 87 (64)
Lincolnweld® L-61® F7A0-EM12K As-welded 480 (70) 580 (84) 28 69 (51)
Lincolnweld® L-70 F9A0-EA1-G As-welded 570 (82) 650 (95) 26 56 (41)

DEPOSIT COMPOSITION

Wire Classification %C %Cr %Cu %Mn %Mo %Ni %P %S %Si Diffusible Hydrogen
mL/100g Weld Metal
Lincolnweld® L-50® F7A0-EM13K-H8 0.05 0.14 1.05 0.022 0.006 1.05 5
Lincolnweld® L-60 F7A0-EL12 0.06 0.11 1.04 0.017 0.008 0.73
Lincolnweld® L-61® F7A0-EM12K 0.04 0.06 1.52 0.020 0.008 0.97
Lincolnweld® L-70 F9A0-EA1-G 0.06 0.04 0.08 1.40 0.51 0.04 0.018 0.009 0.83

FLUX COMPOSITION

Classification %Al2O3 %CaF2 %CaO %MgO %MnO %Na2O %SiO2 %TiO2 %ZrO2 %Metal Alloys
Typical Result 4 5 1 13 15 2 26 10 19 3