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Stainless Steel

JACKSUN NOVA 312

AWS/ASME: A5.9 ER312

JACKSUN NOVA 312 is a stainless steel solid wire designed for MIG (GMAW) and TIG (GTAW) welding applications. It is highly alloyed and ideal for:

  • Joining dissimilar steels such as stainless to carbon steel or low alloy steels.
  • Welding steels difficult to weld (e.g., high-carbon steels, tool steels, Mn steels).
  • Applications requiring crack resistance in high restraint joints.
  • Buffer layers before hardfacing or stainless overlays.

The weld metal has a two-phase microstructure (austenite + ferrite), providing exceptional strength and crack resistance.

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Technical Data

Product Specifications

1. Typical Chemical Composition

CMnSiCrNiMoSPCu
≤ 0.151.0 – 2.5≤ 0.03-0.6528.0 – 32.08.0 – 10.5≤ 0.75≤ 0.035≤ 0.025≤ 0.75

2. Typical Mechanical Properties

PropertyUTS (MPa)Yield Strength (MPa)Elongation (%)Impact Toughness (J @ RT)
Requirement (AWS A5.9 ER312)≥ 660≥ 500≥ 25≥ 27
Typical Values650 – 750420 – 50030 – 3550 – 70

3. Recommended Welding Parameters

ProcessDiameter (mm)Current (A)Voltage (V)Shielding GasPolarityGas Flow (L/min)
TIG (GTAW)1.6 – 3.270 – 180—100% ArDCEN8 – 12
MIG (GMAW)0.8 – 1.6100 – 28022 – 3298% Ar + 2% O₂ or Ar + 2% CO₂DCEP12 – 20
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