AWS A5.28 ER80S-B6
Chromium-Molybdenum Steel Electrodes and Rods — ER80S-B6
ER80S-B6
ER80S-B6 [ER55S-B6] (or Alloy 502) is used for welding material of similar composition, usually in the form of pipe or tubing for high temperature service applications. This electrode is similar to that previously classified as ER502 in AWS A5.9-93.
ER80S-B6 Applications
ER80S-B6 is used for joining 5 Cr and ½ Mo steels such as A336 Grade F5, A155 Grade 5 Cr, A335 Grades P5 and P5b, A217 C5 (cast), and A199/A213 Grades T5 and T5b. These grades are used for elevated temperature creep service and with corrosion resistance against steam, hot hydrogen gas, and high sulfur crude oils. We recommend a minimum preheat and interpass temperature of 350F during welding.
ER80S-B6 Weldability
This alloy is an air-hardening material which requires preheat and post-weld heat treatment.
Specifications:
- AWS A5.28 ER80S-B6
- UNS S50280
| Nominal Chemistry Composition (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Ni | Mn | Si | Mo | P | Cu | S | OE | |
| 0.10 max | 0.60 max | 0.40-0.70 | 4.50-6.00 | 0.50 max | 0.45-0.65 | 0.025 max | 0.35 max | 0.025 max | 0.50 max |
| Deposited All Weld Metal Mechanical Properties | ||
|---|---|---|
| Tensile Strength (psi) | 82,000 | |
| Yield Strength (psi) | 72,000 | |
| Elongation (no units) | 27% | |