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CLASSIFICATION: EC309LSi per AWS A5.22

This metal cored, stainless steel electrode is composed of 24% chromium, 13% nickel and 0.8% silicon with a maximum carbon content of .03%. The higher silicon level improves bead wetting while the lower carbon content minimizes carbide precipitation and makes the weld metal more resistant to intergranular corrosion.

APPLICATIONS: SelectAlloy 309LSi-C is utilized in the welding of refinery and chemical processing equipment as well as furnace and auto exhaust parts. This electrode welds Type 309 stainless steel and may be used to join carbon and low alloy steels to austenitic stainless steels.

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

SHIELDING GASES: Ar/1-2% O2, Ar/1-2% CO2, 40-50 cfh

WELDING POSITIONS: Flat and Horizontal

CHARACTERISTICS:

  • Produces smooth, well washed beads.
  • Ideally suited for making small butt, lap and fillet welds on thin material at elevated travel speeds.
  • Produces little or no slag and virtually no spatter.
  • Handles poor fit-up.
  • Offers higher deposition rates than equivalent solid wire.
Typical Mechanical Properties:
  98% Ar/
2% O2
Ultimate Tensile Strength (psi) 87,000
Yield Strength (psi) 66,200
Percent Elongation 39
Typical Deposit Composition:
Wt% C Mn Si Ni Cr N
98Ar/2O2 .03 1.40 .80 12.80 23.90 .05

Ferrite Number (WRC, 1992) - 15

TYPICAL WELDING PARAMETERS (Ar/2%O2) *
Diam. Amps
Volts WFS
(in/min)
ESO
(in.)
Dep. Rate
(lbs/hr)
.035" 110 25 300 5/8-3/4" 3.3
.035" 150 26 500 5/8-3/4" 5.4
.035" 165 27 600 5/8-3/4" 6.3
.035" 175 28 700 5/8-3/4" 7.7
           
.045" 180 21 250 1/2-5/8" 7.1
.045" 240 23 400 1/2-5/8" 11.3
.045" 280 25 500 1/2-5/8" 14.1
.045" 300 28 650 1/2-5/8" 18.4
           
1/16" 190 24 150 3/4 - 1" 7.7
1/16" 280 25 250 3/4 - 1" 12.8
1/16" 385 26 350 3/4 - 1" 17.9
1/16" 490 32 450 3/4 - 1" 23.1

* Optimum conditions are in boldface type.

Select-SAI all position electrodes do not contain bismuth.