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Union I MoMn TIG rod: Böhler Welding TIG rods in an R20 box, coppered
Union, TIG rod, high-strength steels

Union I MoMn TIG rod

EN ISO classification636-A W 50 3 Z4MoSi
AWS classificationA5.28 / SFA-5.28 ER90S-D2
Shielding gasI1: 100 % argon, I3: argon with helium
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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 TIG rod is used for

Union I MoMn is a low-alloy, high strength TIG rod. It goes into mobile equipment, machine frames, cranes and weight saving components.

Typical base materials are P235GH, P460M and S460MC. The rod handles pipeline welding including fill passes, it is used on boilers and pressure vessels under statutory inspection, and it suits welds that need a smooth face.

  • Classification EN ISO: 636-A W 50 3 Z4MoSi
  • AWS classification: A5.28 / SFA-5.28 ER90S-D2
  • Shielding gas: I1, I3
  • Diameters: 2.4 mm

Do not exceed the permitted interpass temperature, an overheated heat affected zone loses its toughness. Grind the tungsten tip along its axis and hold a short arc, otherwise the pool spreads. Protect the root when you weld from one side, an oxidised underside spoils the corrosion resistance.

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
0,090,651,800,52
Welding data and approvals
Polaritydirect current, electrode negative (DC-)
Shielding gas to EN ISO 14175I1
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 -20 °C Impact energy KV, J at -40 °C
u 550 (min. 540) 680 (min. 620) 18 - -
s 530 (min. 510) 650 (min. 600) 20 (min. 18) 110 (min. 80) 47
  • u: untreated, as welded, shielding gas Ar
  • s: stress relieved (610°C / 16 h), shielding gas Ar
Fits

For which materials and machines

Base materials
  • P235GH
  • P460M
  • S460MC
Process and machines

TIG rod, works on any sound machine for this process: welders. Shielding gas: I1: 100 % argon, I3: argon with helium.

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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: TIG welding rods