When repair welding of the O1 tool steel in hardened and tempered condition, the steel should be preheated to a minimum tempering temperature of 200°C (93°F) and welded at the same tempering ...

Nicole Patel, owner and Chocolatier of Delysia Chocolatier, shared with us the most important tool for tempering chocolate. It might not be what you think.

Tempering and Heat Treatment of Tool Steels Tempering is another aspect of tooling heat treatment which requires careful planning. Many of the more complex tool steels such as the high speed and hot ...