T-PUT Thermanit 1610 SI description: Stainless; corrosion-resistant similar to matching 17 % Cr steels/cast steel grades (seawater, diluted organic and inorganic acids). For joining and surfacing work on matching ferritic and similar Cr steels/cast steel grades, suitable for quenching and tempering. Lowest possible heat input is required, as ferritic 17 % Cr steels are susceptible to embrittlement due to grain growth.