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CLASSIFICATION: E81T1-B8M per AWS A5.29, ASME SFA 5.29

Select 810-B8 is an all position, flux cored electrode formulated for single and multiple pass welding of 9 chromium and 1 molybdenum steels.

APPLICATIONS: Select 810-B8 is used to weld 9Cr-1Mo steels such as A335-P9 piping and A213-T9 tubing. Typical applications involve high temperature service in the petrochemical and petroleum industries.

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

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

WELDING POSITIONS: All positions

CHARACTERISTICS:

  • Uniform weld beads with good tie-in.
  • Smooth and stable arc transfer.
  • Greater tolerance for mill scale and rust.
  • Increased deposition rates compared to covered and solid electrodes.
  • Eliminates lack of fusion defects.
TYPICAL MECHANICAL PROPERTIES
 
SR 2 Hr. @1375°F
75% Ar/
25% CO2
Ultimate Tensile Strength (psi) 96,300
Yield Strength (psi) 78,000
Percent Elongation 20

TYPICAL DEPOSIT COMPOSITION
Wt% C Mn P S Si Cr Mo
75 Ar/25 CO2
.09 .50 .010 .010 .35 9.30 1.05

RECOMMENDED WELDING PARAMETER
  Optimum * Range *
Diam. Position Amps Volts WFS
(ipm)
ESO Amps Volts
1/16" Flat 330 29 330 1/2-1" 150-400 22-34
  Overhead 225 26 180 1/2-1" 150-310 22-28
  Vertical up 225 25 180 1/2-1" 150-280 22-27
.052" Flat 275 28 400 1/2-1" 140-330 19-32
  Overhead 200 26 245 1/2-1" 150-290 21-28
  Vertical up 200 25 245 1/2-1" 140-270 21-27
.045" Flat 250 28 450 1/2-1" 130-300 21-32
  Overhead 190 26 305 1/2-1" 150-280 21-30
  Vertical up 190 25 305 1/2-1" 130-260 21-29

* With CO2 shielding gas. For 75% Ar/25%-CO2 shielding gas reduce the voltage by 1 to 1.5 volts.