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CLASSIFICATION: E91T1-B9M per AWS A5.29, ASME SFA 5.29

Designed for single and multiple pass welding of 9 chromium and 1 molybdenum steels, the Select 910-B9 all position, flux cored electrode contains small additions of niobium, vanadium and nitrogen to improve long term creep properties.

APPLICATIONS: Select 910-B9 is used to weld 9Cr-1Mo creep resistant steels, such as A387 Gr 91 plate; A335 P91 and A369-FP91 piping; A199-T91, A200-T91 and A213-T91 tubing; A182-F91 forgings; as well as fittings and castings of similar composition. Typical applications include power plant turbine casings, valves, headers and piping.

DIAMETERS: .045", .052", 1/16"

SHIELDING GAS: 75-80% Ar/balance CO2, 40-50 cfh

WELDING POSITIONS: All positions

CHARACTERISTICS:

  • Premium electrode for joining 9Cr-1Mo steels.
  • Arc transfer is smooth and stable.
  • Uniform weld bead with good tie-in.
  • Eliminates lack of fusion defects, improves deposition rates over solid wire.

    TYPICAL MECHANICAL PROPERTIES
      75% Ar/25% CO2
    SR 2 Hr. @ 1400°F
    SR 4 Hr. @ 1400°F
    Ultimate Tensile Strength (psi) 104,200 99,800
    Yield Strength (psi) 84,200 81,900
    Percent Elongation 20 21

    TYPICAL DEPOSIT COMPOSITION
    Wt% Al C Cr Mn Mo N Nb Ni P S Si V
    75 Ar/25 CO2 <.01 .10 9.00 .70 1.00 .04 .04 .35 .010 .010 .25 .20

    RECOMMENDED WELDING PARAMETERS
      Optimum Range
    Diam. Position Amps Volts WFS Amps Volts
    .045" Flat 230 27 430 130-280 21-31
      Overhead 180 25 290 150-260 21-29
      Vertical up 180 24 290 130-240 21-28
    .052" Flat 275 27 400 140-330 21-32
      Overhead 200 25 245 150-290 21-28
      Vertical up 200 24 245 140-270 21-27
    1/16" Flat 330 28 330 150-400 22-34
      Overhead 225 25 180 150-310 22-28
      Vertical up 225 24 180 150-280 22-27
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