AWS A5.28 ER80S-B2
Chromium-Molybdenum Steel Electrodes and Rods — ER80S-B2
ER80S-B2
ER80S-B2 [ER55S-B2] are used to weld ½Cr-½Mo, 1Cr-½Mo, and 1-¼Cr-½Mo steels for elevated temperatures and corrosive service. They are also used for joining dissimilar combinations of Cr-Mo and carbon steels. All transfer modes of the GMAW process may be used. Careful control of preheat, interpass temperatures, and postheat is essential to avoid cracking. These electrodes are classified after postweld heat treatment. Special care must be used when using them in the as-welded condition due to higher strength levels.
| 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 | 0.40-0.70 | 0.40-0.70 | 0.025 max | 0.025 max | 0.20 max | 1.20-1.50 | 0.40-0.65 | – | – | – | – | 0.35 max | 0.50 max | 80,000 | 550 | 68,000 | 470 | 19 | Not Required |