AWS A5.28 ER90S-D2
Manganese-Molybdenum Steel Electrodes and Rods — ER90S-D2
ER90S-D2
ER90S-D2 [ER62S-D2] and ER80S-D2 [ER55S-D2] classifications have the same chemical requirements as the E70S-1B classification of AWS A5.18-69. The differences between the ER80S-D2 and the ER90S-D2 classifications are the change in shielding gas and the mechanical property requirements. Filler metals of these classifications contain molybdenum for increased strength and a high level of deoxidizers (Mn and Si) to control porosity when welding with CO2 (AWS A5.32 Class SG-C) as the shielding gas. They will give radiographic quality welds with excellent bead appearance in both ordinary and difficult-to-weld carbon and low-alloy steels. They exhibit excellent out-of-position welding characteristics with the short circuiting and pulsed arc processes.
The combination of weld soundness and strength makes filler metals of these classifications suitable for single- and multiple-pass welding of a variety of carbon and low-alloy, higher strength steels in both the as-welded and postweld heat-treated conditions. The chemical composition of these classifications differs from those of the “-D2” type electrodes in AWS A5.5.
| Nominal Chemical Composition (%) | Tensile Strength | Yield Strength | Elongation | Average Impact Strength | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | P | S | Ni | Cr | Mo | V | Ti | Zr | Al | Cu | TOE | psi (min) | MPa (min) | psi (min) | MPa (min) | % (min) | 20 ft•lbf @ |
| 0.07-0.12 | 1.6-2.10 | 0.50-0.80 | 0.025 max | 0.025 max | 0.15 max | – | 0.40-0.60 | – | – | – | – | 0.50 max | 0.50 max | 90,000 | 620 | 78,000 | 540 | 17 | -20°F |