AWS Classifications Causes and Cures

1 ElectrodeTensile in ksiPositionType of coating and currentChemical composition of weld metal depositE8018-B2 Low Alloy Covered ElectrodesElectrodeTensile in ksiPositionType of coating and currentMeets lower temperature impact requirementsHydrogen: H4 = Less than 4 ml/100 g. H8 = Less than 8 ml/100 gMeets requirements of absorbed moisture testE7018-1 H4 RMild Steel Covered Electrodes, SMAW ProcessChemical Composition of Solid Wires Using CO2 Shielding GasAWS classificationShielding gasTensileStrength ksi (MPa)YieldStrength ksi (MPa)% Elongation min. in 2"(50 mm)Impact at F (J at C)CHEMICAL COMPOSITIONCMnSiPSNiCrMoCuOtherER70S-2C0 270 (500)60 (420)2220 at -20 (27 at -29)..50Ti, Zr, AlER70S-3C0270 (500)60 (420)2220 at 0 (27 at -18)..50 ER70S-4C0270 (500)60 (420)22 ..50 ER70S-5C0270 (500)60 (420)22 ..50 AlER70S-6C0270 (500)60 (420)2220 at -20 (27 at -29)..50 ER70S-7C0270 (500)60 (420)2220 at -20 (27 at -29).

2 50 ER80S-D2C0280 (550)68 (470)1720 at -20 (27 at -29).. Chemical Composition of Weld Metal *.80 .. * . * .. * . * . *.90 .. ** * Amount depends on electrode classification . Single values indicate maximum.** All G Classifications have the same chemical minimum Flat, Horizontal, Vertical, Overhead2 Flat and Horizontal onlyTypes of Coating & CurrentAWSDIGITTYPE OF COATINGWELDING CURRENT60100cellulose sodiumDCEP60111cellulose potassiumAC or DCEP60222titania sodiumAC or DCEN60133titania potassiumAC or DCEP or DCEN70144iron powder titaniaAC or DCEP or DCEN70188iron powder low hydrogenAC or DCEPDCEP Direct Current Electrode PositiveDCEN Direct Current Electrode Negative AC Alternating CurrentElectrode or rodTensile in ksiSolidChemical composition & shielding gasER70S-3 Mild Steel Solid Electrodes, GMAW, GTAW and PAWE lectrode or rodTensile in ksiSolidChemical compositionER80S-D2 Low Alloy Solid Electrodes, GMAW, GTAW and PAWC auses and Cures of Common Welding Troubles AWS Classifications