SelectAlloy 308LSi-C Cryo

Stainless Steel / Metal Cored / Gas Shielded

Features

  • Increased silicon (Si) content compared to standard grades of the same alloy composition improves bead wetting and arc stability.
  • Low C, < 0.03 wt%, minimizes sensitization susceptibility which makes the weld metal more resistant to intergranular corrosion.
  • Metal cored benefits include the ability to successfully bridge gaps when part fit up is not as designed, higher travel speeds with subsequent lower heat inputs at equal amperages, and ability to join thin materials.
  • Applications for this alloy type include fabrication or repair of cryogenic components of similar composition that require weld metal toughness to maintained at temperatures of -320ºF (-196ºC).

Standard Diameters

in (mm)
  • 0.045 (1.2)

Welding Positions

Flat and Horizontal

Shielding

  • Ar + 0.5-3% CO₂
  • Ar + 0.5-3% O₂
    Flow Rate: 40 – 50 CFH

Polarity

Direct Current Electrode Positive (DCEP)

TYPICAL WELD DEPOSIT CHEMISTRY (WT%)
Shielding Gas C Cr Cu Mn Mo Ni P S Si WRC-1992 Ferrite
98% Ar/2% O₂ 19.95 0.11 1.39 0.08 10.52 0.02 0.005 0.79 5
Typical Mechanical Properties
Shielding Gas Tensile Strength
ksi (MPa)		 Yield Strength
ksi (MPa)		 Elongation
(%)		 WeldCondition PWHTTemp Charpy V-Notch
-320 °F ft⋅lb (-196 °C J)
98%Ar / 2%CO2 91 (628) 64 (441) 38 As-Welded – 26.2
Recomended Welding Parameters
Diameter
in (mm)		 Shielding Gas Position Wire Feed Speed
in/min (m/min)		 Amps Volts Contact Tip to Work Distance
in (mm)
0.045 (1.2) 98% Ar/2% CO₂ Flat & Horizontal 325 (8.3) 220 22 1/2 – 5/8 (13 – 16)
0.045 (1.2) 98% Ar/2% CO₂ Flat & Horizontal 375 (9.5) 235 23 1/2 – 5/8 (13 – 16)
0.045 (1.2) 98% Ar/2% CO₂ Flat & Horizontal 420 (10.7) 250 24 5/8 – 3/4 (16 – 19)
0.045 (1.2) 98% Ar/2% CO₂ Flat & Horizontal 500 (12.7) 270 26 5/8 – 3/4 (16 – 19)

Packaging (lbs (kg))

33 (15) Spools, 60 (27.2) Coils, 500 (226.8) Round Drum, 800 (362.9) Hex Drum, 900 (408.2) Hex Drum

*Some packaging options may not be available depending on diameter and product. Special package options may be available upon request.