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CLASSIFICATIONS: E81T1-Ni1C, E81Ni1M per AWS A5.29, ASME SFA 5.29, MIL-8IT1-Ni1C and 8IT1-Ni1M per MIL-E-24403/1

APPROVALS: ABS 4YSA, DNV 4 YMS(CO2, DNV 3 YMS(C25), Lloyd’s 3S, 3YS (All CO2/C25); MIL-81T1-Ni1C and MIL-81T1-Ni1M

Select 820-Ni1 is a gas-shielded, flux cored electrode designed for the all position, single and multiple pass welding of carbon and low alloy steels which require moderate tensile strength and good CVN toughness at subzero temperatures.

APPLICATIONS: Select 820-Ni1 is an excellent selection for welding those steels requiring good low temperature CVN toughness and moderate (80,000 psi minimum) tensile strength such as ASTM A203 GrA, A352 Cr LC1 and LC2, A572 and A734. These steels are used in offshore platform fabrication, mining machinery, earthmoving equipment and structural applications.

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

SHIELDING GAS: 100% CO2, 75-80% Ar/ balance CO2, 35-50 cfh

WELDING POSITIONS: All positions

CHARACTERISTICS:

  • Superior low temperature CVN toughness values.
  • Smooth arc with very low spatter.
  • Fast freezing characteristics facilitate all position welding.
  • Smooth bead profile with minimum convexity.
TYPICAL MECHANICAL PROPERTIES
 
CO2
75% Ar/ 25% CO2
Ultimate Tensile Strength (psi) 86,400 89,000
Yield Strength (psi) 73,700 80,000
Percent Elongation 27 24
CVN (ftlb f) @ -40° F 90 94

TYPICAL DEPOSIT COMPOSITION
Wt%
C
Mn
P
S
Si
Ni
CO2
.03
1.15
.008
.008
.41
0.91
75 Ar/25 CO2
.03
1.29
.009
.009
.50
0.90

RECOMMENDED WELDING PARAMETERS*
  Optimum Range
Diam. Position Amps Volts WFS Amps Volts
1/16" Flat 350 29 300 150-400 22-34
  Overhead 225 26 160 150-310 22-28
  Vertical up 225 25 160 150-280 22-27
.052" Flat 300 28 360 100-330 19-32
  Overhead 225 26 245 150-310 21-28
  Vertical up 225 25 245 150-280 21-27
.045" Flat 250 28 282 100-300 21-32
  Overhead 200 26 265 150-280 21-29
  Vertical up 200 25 265 100-230 21-28

* With CO2 shielding gas. For 75Ar/25CO2 decrease voltage by 1 to 1.5 volts.