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Union I MoMn solid MIG/MAG wire: Böhler Welding wire on a BS300 spool, coppered
Union, solid MIG/MAG wire, creep-resistant CrMo steels

Union I MoMn solid MIG/MAG wire

EN ISO classification21952-A G ZMn4MoSi
AWS classificationA5.28 / SFA-5.28 ER90S-D2
Shielding gasC1: 100 % CO2, M1: Ar with a small addition of CO2 or O2, M2: Ar with 5 to 25 % CO2, M3: Ar with 25 to 50 % CO2 or O2
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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 Specifications Manufacturer datasheet Fits Substitute Bought together
Application

What Union I MoMn solid MIG/MAG wire is used for

Union I MoMn is a low-alloyed, creep resistant solid wire. It suits welding CrMo steels in power generation, on superheaters, headers and pressure piping in chromium molybdenum steel.

Parent materials are P235GH, P460M, S460N and S460MC. The wire does well on pipe welding, fill passes included, on boilers under technical inspection, and the deposit stands up to creep at elevated temperature.

  • Classification EN ISO: 21952-A G ZMn4MoSi
  • AWS classification: A5.28 / SFA-5.28 ER90S-D2
  • Shielding gas: M1, M3, C1
  • Diameters: 1.2 mm

Plan the preheating and the post weld heat treatment to the WPS for the grade in hand, CrMo steels harden in the heat affected zone. 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. Check the contact tip, a worn bore upsets the wire feed and causes burnback.

Manufacturer datasheet

Chemical composition and properties from the manufacturer datasheet

Datasheet PDF

Typical weld metal values from the voestalpine Böhler Welding data sheet, issue 06/2023. 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.-%
CSiMnMo
0,090,651,80,52
Welding data and approvals
Polaritydirect current, electrode positive (DC+)
Shielding gas to EN ISO 14175M1
Datasheet edition06/2023
Mechanical properties of the all-weld metal, typical values
Condition Yield strength Re, MPa Tensile strength Rm, MPa Elongation A, % Impact energy KV, J at -30 °C
u1 540 620 17 47
s1 510 600 19 27
u2 470 550 17 27
  • u1: untreated, as welded, shielding gas M21
  • s1: stress relieved 610°C / 5h, shielding gas M21
  • u2: untreated, as welded, shielding gas CO2
Fits

For which materials and machines

Base materials
  • P235GH
  • P460M
  • S460N
  • S460MC
Process and machines

Solid MIG/MAG wire, works on any sound machine for this process: welders. Shielding gas: C1: 100 % CO2, M1: Ar with a small addition of CO2 or O2, M2: Ar with 5 to 25 % CO2, M3: Ar with 25 to 50 % CO2 or O2.

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Technical substitute

A substitute for this consumable

We will find a substitute with the same classification, diameter and shielding gas over the phone: +48 669 162 833.

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