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High-strength low-alloy steel 50 mm thick is well joined by metal-active gas double-sided double-power arc welding, which does not require preheating, postheating, and back chipping. Mechanical properties of the weld seam and base metal were investigated. Results of the tensile test indicate that the strength of the weld seam is about 862.73 MPa and its average elongation is 20.74%. The hardness of...
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