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CLASSIFICATION: EC312 per AWS A5.22

With a nominal weld composition of 30% chromium, 9% nickel and 0.1% carbon, SelectAlloy 312-C produces a two-phase weld metal with substantial ferrite in an austenitic matrix. The high level of ferrite in this gas-shielded, metal cored, stainless steel electrode makes the weld metal very resistant to cracking, even when highly diluted.

APPLICATIONS: SelectAlloy 312-C is well suited for making small butt, lap and fillet welds on thin material at elevated speeds. This wire is used for the welding of dissimilar metals such as the joining of carbon steels to stainless steels high in nickel.

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

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

WELDING POSITIONS: Flat and Horizontal

CHARACTERISTICS:

  • Higher deposition rates, more controlled penetration than the equivalent solid electrode.
  • Operates at high travel speed.
  • Handles poor fit-up.
  • Produces virtually no spatter and little or no slag.
  • Provides a smooth, spray arc transfer.
Typical Mechanical Properties
  98% Ar/
2% O2*
Ultimate Tensile Strength (psi) 114,000
Yield Strength (psi) 87,200
Percent Elongation 24

Typical Deposit Composition
Wt% C Mn Si Ni Cr N
98Ar/2O2 .10 1.50 .50 9.30 29.80 .05

Ferrite Number (WRC, 1992) - 65

TYPICAL WELDING PARAMETERS (CO2) *
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.