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diamondspark 52 RC flux-cored wire: Böhler Welding wire on a BS300 spool, coppered
diamondspark, flux-cored wire, mild and low-alloy steels

diamondspark 52 RC flux-cored wire

EN ISO classification17632-A T 46 4 P M21 1 H5 T 46 2 P C1 1 H5
AWS classificationA5.20 / SFA-5.20 E71T-1M/T-9M/T-12M JDH4 E71T-1C/T-9C/T-12C DH4
Shielding gasC1: 100 % CO2, M21: Ar with 15 to 25 % CO2
ApprovalsTÜV (06219), DB (42.052.03), ABS, DNV, LR, BV, RINA, RS, CE; D1.8 seismic supplement
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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 diamondspark 52 RC flux-cored wire is used for

diamondspark 52 RC is a seamless rutile flux-cored wire for mild steel, suitable for all welding positions, run under M21 or 100 % CO2 shielding gas and rated down to -40 °C.

Among the parent materials it covers S235JR, S355JR, S235JO, S355JO, S450JO, S235J2 and S355J2. The seamless sheath keeps moisture away from the core even after longer storage, and the wire is used in structural steelwork, on tanks, piping and series production.

  • Classification EN ISO: 17632-A T 46 4 P M21 1 H5 T 46 2 P C1 1 H5
  • AWS classification: A5.20 / SFA-5.20 E71T-1M/T-9M/T-12M JDH4 E71T-1C/T-9C/T-12C DH4
  • Shielding gas: M21, C1
  • Diameters: 1.0 / 1.2 / 1.4 / 1.6 mm
  • Approvals: TÜV (06219), DB (42.052.03), ABS, DNV, LR, BV, RINA, RS, CE; D1.8 seismic supplement

Clean rust, paint and grease out of the groove, contaminated plate gives porosity even with well set parameters.

Manufacturer datasheet

Chemical composition and properties from the manufacturer datasheet

Datasheet PDF

Typical weld metal values from the voestalpine Böhler Welding data sheet, issue 01/2026. 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
gas M210,060,401,45
gas C10,040,351,25
Welding data and approvals
Polaritydirect current, electrode positive (DC+)
Shielding gas to EN ISO 14175M21, C1
ApprovalsTÜV (06219), DB (42.052.03), DNV, ABS, LR, BV, RINA, RS, CWB, CE, D1.8 seismic supplement; MIL-DTL-24403/1F: MIL-71T-1C,
Datasheet edition01/2026
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 Impact energy KV, J at -46 °C Impact energy KV, J at -50 °C
u 500 (min. 460) 590 (range 530 do 620) 26 (min. 22) 100 (min. 47) 70 (min. 47) 50 (min. 27) 45 (min. 27)
u1 470 (min. 460) 560 (range 530 do 620) 28 (min. 22) 80 (min. 47) - - -
s1 510 (min. 460) 590 (range 530 do 620) 26 (min. 22) - 80 (min. 47) 41 (min. 27) -
  • u: Untreated, as welded, shielding gas M21
  • u1: Untreated, as welded, shielding gas C1
  • s1: stress relieved 620°C/1 hour, shielding gas M21
Fits

For which materials and machines

Base materials
  • S235JR
  • S355JR
  • S235JO
  • S355JO
  • S450JO
  • S235J2
  • S355J2
  • S275N
  • S460N
  • S275M
  • S460M
  • P235GH
Process and machines

Flux-cored wire, works on any sound machine for this process: welders. Shielding gas: C1: 100 % CO2, M21: Ar with 15 to 25 % CO2.

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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: Flux-cored wires