Böhler Welding, solid MIG/MAG wire, mild and low-alloy steels

ECOspark 6-NC solid MIG/MAG wire

EN ISO classification14341-A G 42 4 M21 3Si1 G 42 4 C1 3Si1
AWS classificationA5.18 / SFA-5.18 ER70S-6
Shielding gasC1: 100 % CO2, M21: Ar with 15 to 25 % CO2, M33: Ar with CO2 and O2
ApprovalsTÜV (19913), DB (32.132.95), CWB, CE
from59.75 EURnet
from73.49 EURgross

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Authorised distributorvoestalpine Böhler Welding
Courier shippingfrom the warehouse in Krotoszyn
Data sheetcomposition, properties, specifications
Wire selectionhelp from a welding engineer
Manufacturer data sheet
Application

What ECOspark 6-NC solid MIG/MAG wire is used for

ECOspark 6-NC is a solid wire for mild steel, supplied without a copper coating. It works on welded structures, halls, frames, machine parts and repairs of structural steel.

Among the parent materials it covers S235JR, S355JR, S235JO, S355JO, S235J2, S355J2 and S275N. Leaving out the copper coating limits liner fouling and copper in the fumes.

  • Classification EN ISO: 14341-A G 42 4 M21 3Si1 G 42 4 C1 3Si1
  • AWS classification: A5.18 / SFA-5.18 ER70S-6
  • Shielding gas: C1, M21, M33
  • Diameters: 0.8 / 0.9 / 1.0 / 1.2 / 1.6 mm
  • Approvals: TÜV (19913), DB (32.132.95), CWB, CE

Match the voltage to the wire feed speed, too low a setting gives a convex face and no fusion into the edges. Set the gas flow so the pool is covered over the whole length of the bead, and shield the station when you work in wind.

Manufacturer datasheet

Chemical composition and properties from the manufacturer datasheet

Datasheet PDF

Typical weld metal values from the voestalpine Böhler Welding data sheet, issue 05/2026. The minimum or the range guaranteed by the maker is given in brackets. The figures depend on the heat treatment condition and the shielding gas stated in the row and do not replace testing the joint to your own WPS.

Chemical composition, wt.-%
CSiMn
0,070,901,45
Welding data and approvals
Polaritydirect current, electrode positive (DC+)
Shielding gas to EN ISO 14175C1
ApprovalsTÜV (19913), DB (32.132.95), CWB (CSA W48-23: B-G 49A 3 C1 S6), CE
Datasheet edition05/2026
Fits

For which materials and machines

Base materials
  • S235JR
  • S355JR
  • S235JO
  • S355JO
  • S235J2
  • S355J2
  • S275N
  • S420N
  • S275M
  • S420M
  • P235GH
  • P355GH
Process and machines

Solid MIG/MAG wire, works on any sound machine for this process: welders. Shielding gas: C1: 100 % CO2, M21: Ar with 15 to 25 % CO2, M33: Ar with CO2 and O2.

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Technical substitute

Consumables with the same classification

Same material group, matching classification, a shared diameter and the same shielding gas. Confirm any substitute for your WPS in the documentation.

From the same group

Other consumables for the same material

For comparison before you buy. A technical substitute is listed above.

All: Solid MIG/MAG wires
from59.75 EURnet
from73.49 EURgross
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