AWS A5.29 CLASS E 91T1-B3
E91T1-B3 is a titania slag formulation flux cored wire for single or multi-pass welds on 2.25% Cr 1.0% Mo steels used for high-pressure steam pipes of boilers, power generation plant equipment, oil refining processing equipment, pressure vessels, and castings of the same alloy content. The weld deposits are designed to operate at high-temperature service. The shield gas recommended is 100% CO2.
E91T1-B3 is used extensively in the fabrication, erection and repair of pressure vessels, petrochemical processing equipment, and piping systems. The weld metal analysis of the deposit is similar to E9018-B3 Low Hydrogen Electrodes. The weld deposits are smooth and have deep penetration. E91T1-B3 is noted for its smooth arc and minimum spatter. When used for horizontal fillet joints the weld bead has equal leg lengths, flat-faced fillets with fine ripples. This is an all-position wire and can also be used with Argon CO2 mixed shield gas.
TYPICAL WELD METAL CHEMISTRY (%)
TYPICAL MECHANICAL PROPERTIES OF WELD DEPOSIT
Yield Point (psi)
Tensile Strength (psi)
Elongation in 2" (%)