Patent ID: 9095919
Filing Date: 2015-08-04
Classification: B23K

Abstract:
1. A stick electrode for providing a high strength weld on a steel alloy workpiece comprising a high strength weld metal bead to be deposited on said workpiece where a yield strength is from about 85 ksi to 125 ksi and a tensile in a range from 104 ksi to 119 ksi with reduced sensitivity to a cooling rate of said deposited weld metal bead, wherein said deposited weld metal bead consists essentially of: wherein said electrode comprises: ratios of carbon, manganese and molybdenum in said electrode adjusted to provide a carbon equivalent (Pcm) in said deposited weld metal bead in the range of about 0.15-0.35 as calculated by the formula: wherein a combination of carbon and ratio of Mn/Mo produces a lower carbon equivalent in said weld metal bead deposit while still meeting said yield strength of from about 85 ksi to 125 ksi and said tensile strength in a range from 104 ksi to 119 ksi than if said yield strength and said tensile strength were achieved by an addition of carbon alone, and additionally reducing yield strength sensitivity to the cooling rate.