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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

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 ProcessStandardFiller Metal
SAWAWS A5.23EB9 Wire
SMAWAWS A5.5E9015-B9 Electrode
SMAWAWS A5.5E9018-B9 Electrode
GTAW(TIG)AWS A5.28ER90S-B9 Electrode or Rod
GMAW(MIG)AWS A5.28ER90S-B9 Electrode or Rod
FCAWAWS A5.28E91T1-B9M Electrode
*AWS 5.5: Specification for low-alloy steel electrodes for shielded metal arc welding(SMAW).
*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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    Hebei Metals Industrial Limited
    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
    No. 176, Zhonghua South Street, Shijiazhuang, China.
    Tel: +86-311-89642206