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CLASSIFICATION: E90C-B3 per AWS A5.28, ASME SFA 5.28

Select 90C-B3 is alloyed with approximately 2 1/4% chromium and 1% molybdenum. This composite metal cored electrode, intended for single and multiple pass welding, produces a high strength weld deposit which is generally post weld treated. Care must be taken with welds which are used in the as-welded condition. Classification of this electrode is, therefore, in the post weld heat treated condition.

APPLICATIONS: Select 90C-B3 is designed for welding the 2 1/4 Cr-1 Mo steels used in high temperature and pressure piping as well as pressure vessels. ASTM A387 - Grade 22 is a standard grade of steel used in many of these applications. Select 90C-B3 may also be used to weld Cr-Mo steels to carbon steel.

DIAMETERS: .035", .045", .052", 1/16"

SHIELDING GAS: 95-98% Ar/balance O2, 75-95% Ar/balance CO2, 40-50 cfh

WELDING POSITIONS: Flat and Horizontal

CHARACTERISTICS:

  • Greater tolerance for mill scale than solid wires.
  • Enhanced welder appeal.
  • Higher productivity due to faster travel speeds.

    TYPICAL MECHANICAL PROPERTIES
     
    75% Ar/25% CO2 -
    SR 1 Hr. at 1275°F
    Ultimate Tensile Strength (psi) 93,000
    Yield Strength (psi) 78,500
    Percent Elongation 22

    TYPICAL DEPOSIT COMPOSITION
    Wt% C Mn P S Si Cr Mo
    75 Ar/25 CO2
    .07 .91 .009 .010 .29 2.24 1.02

    TYPICAL WELDING PARAMETERS*:
      Operating Range Optimum
    Diam. Amps
    (DCEP)
    WFS
    (in/min)
    Volts ESO Amps WFS Volts
    .035" 160-250 350-750 24-35 1/2-3/4" 200 550 29-30
    .045" 180-330 240-600 27-33 1/2-1" 255 410 29-30
    .052" 220-460 220-620 25-35 1/2-1" 300 350 29-30
    1/16" 240-520 175-500 26-37 3/4-1 1/4" 360 300 29-30

    * With 75% Ar/25% CO2. For Ar/O2 mixes lower voltage by 3 volts.
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