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Stainless Steel

JACKSUN NOVA 307Si

AWS/ASME: A5.9 ER307 / ER307Si

JACKSUN NOVA 307Si is an austenitic stainless steel MIG/TIG wire alloyed with manganese (Mn) and higher silicon (Si). It is designed for:

  • Welding dissimilar steels such as stainless steel to mild steel or low-alloy steels.
  • Applications requiring high toughness, strength, and crack resistance.
  • High Si ensures excellent arc stability, bead shape, and wetting properties.
  • Commonly used in buffer layers before hardfacing and for repair welding.
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Technical Data

Product Specifications

1. Typical Chemical Composition

CMnSiCrNiMoSPCu
≤ 0.04-0.143.30-4.750.30 – 0.6519.5 – 22.08.0 – 10.70.5-1.5≤ 0.035≤ 0.025≤ 0.75

2. Typical Mechanical Properties

PropertyUTS (MPa)Yield Strength (MPa)Elongation (%)Impact Toughness (J @ -20 °C)
Requirement≥ 550≥ 350≥ 25≥ 27
Typical Values550 – 750420 – 50030 – 3540 – 60

3. Recommended Welding Parameters

ProcessDiameter (mm)Current (A)Voltage (V)Shielding GasPolarityGas Flow (L/min)
TIG (GTAW)1.6 – 3.270 – 200—100% ArDCEN8 – 12
MIG (GMAW)0.8 – 1.6100 – 28022 – 32Ar + 1–2% O₂ or Ar + CO₂ (98/2)DCEP12 – 20
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