The Welding & Filler Metal for T91/ P91 Steel
T91/ P91 steel manufactured to ASTM A335 P91 or ASTM A213 T91 is a typical tempered martensite in term of microstructure. They can be welded by many common welding methods including SMAW, SAW, GSAW(TIG/MIG), and FCAW, etc. Metals-Piping not only provides premium-quality T91/ P91 seamless pipes and tubes but also supplies optimum filler metals(welding wire, electrode, welding rod, flux) for its welding.
The welding of ASTM A335 P91 pipes in a power plant’s main steam pipeline, Jiangsu province, China. The P91 pipes were supplied by Metals-Piping.
Welding Processes & Filler Metal Selection for P91/ T91 Steel
| Welding Process | Standard | Filler Metal |
|---|---|---|
| SAW | AWS A5.23 | EB9 Wire |
| SMAW | AWS A5.5 | E9015-B9 Electrode |
| SMAW | AWS A5.5 | E9018-B9 Electrode |
| GTAW(TIG) | AWS A5.28 | ER90S-B9 Electrode or Rod |
| GMAW(MIG) | AWS A5.28 | ER90S-B9 Electrode or Rod |
| FCAW | AWS A5.28 | E91T1-B9M Electrode |
*AWS 5.23: Specification for low-alloy steel electrodes and fluxes for submerged arc welding(SAW).
*AWS 5.28: Specification for low-alloy steel electrodes for gas shielded arc welding(GSAW): GTAW/TIG welding, GMAW/MIG welding.
*AWS 5.29: Low-alloy steel electrodes for flux-cored arc welding(FCAW).
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