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MMA Electrodes For High Tensile Low Alloy Steels

high-hensile-low-alloy-steels


This group of electrodes is suited for welding all thicknesses of steel, either wrought or cast, and  even high carbon variants, provided the appropriate pre-heat and post-weld heat treatment is applied.

These electrodes all have the following features in common :

  1. A moisture free chemically basic flux coating that is resistant to subsequent moisture reabsorption which ensures very low as opposed to low weld metal hydrogen levels* and thus the absence of weld metal and HAZ hydrogen embrittlement.
    (Note : very low hydrogen levels = H2 < 5 ml/100g; low hydrogen levels = H2 < 10 ml/100g)
  2. Weld metal with low levels of oxygen and non-metallic inclusions which imparts great resistance to solidification cracking on exceptionally thick sections under great restraints. The higher the Mn-Si ratio, the greater the resistance to solidification cracking.
  3. For the class of electrode they represent, exceptional sub-zero toughness values are obtained, eg: general purpose types assure toughness values to at least -30 ºC, the higher manganese alloyed types to at least -50 ºC and the nickel alloyed types to -80 ºC.
  4. Both strength and toughness properties of the weld metal are maintained after most weld stress relief heat treatments.

 

TYPE AWS DESCRIPTION DATASHEET
RD-360 A5.1 E7016 General purpose. Download
RC-52 A5.1 E7016 General purpose. Download
RD-360U A5.1 E7016 One-sided root runs. Download
RC-52U A5.1 E7016 One-sided root runs. Download
RD-360-1 A5.1 E7016-1 Impacts down to -50 ºC. Download
RD-718 A5.1 E7018 General purpose. Download
CR-718 A5.1 E7018 Impacts down to -50 ºC. Download
RD-718-1 A5.1 E7018-1 Impacts down to -50 ºC. Download
RD-51 A5.5 E8018-W2 Weather proof steels. Download
RD-716G A5.5 E7016-G Impacts down to -50 ºC. Download
LN-15 A5.5 E8016-G Impacts down to -60 ºC. Download
RD-48 A5.1 E7048 Vertical down Download
RD-16C A5.5 E8016-C1 Impacts down to -70 ºC. Download
RD-16C2 A5.5 E8016-C2 Impacts down to -80 ºC. Download
RD-80 A5.5 E8016-G For cast high carbon steels. Download
RD-18C A5.5 E8018-C1 Impacts down to -70 ºC. Download
RD-18C2 A5.5 E8018-C2 Impacts down to -80 ºC. Download
RD-18G A5.5 E8018-G Impacts down to -60 ºC.(NACE) Download
RD-718G A5.5 E7018-G Impacts down to -50 ºC (NACE) Download
RD-90 A5.5 E9016-G Steels with UTS 600N/mm2 Download
RD-100 A5.5 E10016-G Steels with UTS 700N/mm2 Download
RD-19D1 A5.5 E9018-D1 Steels with UTS 600N/mm2 Download
RD-100D2 A5.5 E10018-D2 Steels with UTS 700N/mm2 Download
RD-110 A5.5 E11016-G Steels with UTS 800N/mm2 Download
RD-110M A5.5 E11018-M Steels with UTS 800N/mm2 Download
RD-118G A5.5 E11018-G Steels with UTS 800N/mm2 Download
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