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Welding electrodes Monolith UONI 13/55 Plasma H4R

AWS A5.1: E7018-1 H4 R
EN ISO 2560-А-E 42 4 В 42 Н 5
CONDITIONS OF USE
  • designed for welding in all spatial positions, except from top to bottom, responsible structures and pipelines made of carbon and low-alloy steels with a strength limit from 500 MPa to 640 MPa, especially if it is necessary to ensure high resistance of welded joints against cold cracks.
SPECIAL PROPERTIES
  • special coating prevents the absorption of moisture, reduces the likelihood of pores and guarantees a low hydrogen content in the seam
  • due to the uniform composition of the electrode coating during operation, a stable arc is achieved
  • excellent welding , easy separation of the slag crust, low metal loss from splashing
  • the electrodes do not absorb moisture from the environment for 10-12 hours after opening the pack, thanks to this, they do not require re-piercing before use
  • differ high strength of the weld metal with special metallurgical purity and low hydrogen content in the deposited metal
  • surfacing coefficient: 0.16...0.18 g/A•min
  • consumption of electrodes per 1 kg of deposited metal: 1.4...1.5 kg
Monolith 7018-1 H4 R is designed to be suitable for a broad range of carbon, low alloy, and hardenable steels. It is used for welding of responsible metal structures, boilers and tanks that work under high pressure, as well as in the construction of pipelines, low temperature structural work, in shipbuilding, petrochemical, pressure vessels, power generation. Electrodes are resistant to moisture absorption
Package Weight
First select diameter
Packaging data
Diameter, mm Length, mm Number of electrodes in a pack, pcs. Pack weight, kg
2,5 350 88 – 92; 221 - 230 2,0
3,0 350 60 – 64; 152 - 161 2,0
4,0 450 71 - 73 5,0
5,0 450 48 - 50 5,0
Package Weight
First select diameter
Type of coating
basic with iron powder
Weld metal chemical composition, %
According to AWS A5.1 / Typical results
C
Carbon
≤ 0,09
Mn
Manganese
1,10…1,50
Si
Silicon
0,40…0,70
P
Phosphorus
≤ 0,030
S
Sulfur
≤ 0,020
Weld metal mechanical properties
According to AWS A5.1 / Typical results
  • Tensile strength, MPa: 500 - 640
  • Yield strength, MPa: ≥ 420
  • Elongation, % : ≥ 22
  • Impact strength KCU +20 ˚С, J / cm² ≥ 180
  • Impact strength KV -40˚С, J ≥ 47
Re-drying before welding
  • permissible moisture content in the coating before use is no more than 0.3%
  • if the electrode coating is moistened above normal, dry for 60 minutes at 400 ± 10 °С
Welding parameters
Current, A
2.5 3.0 3.2 4.0 5.0
70 – 100 90 – 140 100 – 150 130 – 180 170 – 230
Welding should be carried out with direct current of any polarity (reverse is recommended, "+" on the electrode) with an arc voltage of 23...27 V or alternating current from a transformer with an idle voltage of 70 V.
WELDING POSITIONS
PA
PB
PC
PF
PE
PD
Certification
Made in accordance with the quality system , ISO 9001 certified
CWB certified to CSA W48: E4313

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