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High Toughness Weld Metals With Superior Ductile Tearing Resistance

  • US 20130292362A1
  • Filed: 12/12/2011
  • Published: 11/07/2013
  • Est. Priority Date: 01/28/2011
  • Status: Active Grant
First Claim
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1. A weld metal for ferritic steel base metals, comprising:

  • between 0.02 and 0.12 wt % carbon;

    between 7.50 and 14.50 wt % nickel;

    not greater than about 1.00 wt % manganese;

    not greater than about 0.30 wt % silicon;

    not greater than about 150 ppm oxygen;

    not greater than about 100 ppm sulfur;

    not greater than about 75 ppm phosphorus; and

    the balance iron,wherein the weld metal comprises retained austenite and further comprises a cellular microstructure comprising cell walls and cell interiors wherein the cell walls are harder than the cell interiors and said weld metal is applied using a gas metal arc welding process with pulsed waveform power supply.

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