G-TECH 1Ni

For welding higher-strength steel structures in situations where post-weld heat treatment (PWHT) is impractical, requiring welds with a suitable level of toughness and crack resistance. The addition of approximately 1% Ni contributes to microstructural refinement, enhancing tolerance to procedural variations compared to plain carbon-manganese (CMn) weld metal. Nickel also improves resistance to atmospheric weathering and enhances electrochemical balance between the weld and base metal, minimizing preferential corrosion in marine environments. In cases of offshore oilfield sour service, a maximum of 1.0% Ni is often required (NACE MR0175). This consumable is recommended for applications where design specifications mandate toughness testing of higher-strength low-alloy steel welds down to –50°C, such as in offshore construction, pipelines, and pressure vessels. Preheat requirements will depend on the grade and thickness of the base material.