BS4659 BD2A Tool Steel

Heat slowly and uniformly to 700°C then more rapidly to 900-1040°C. After forging the tool steel cool down slowly.

As BD2A is supplied in the annealed and machineable condition re-annealing will only be necessary if the steel has been forged or hardened. Heat slowly and uniformly to 900°C then soak for three to four hours and allow to cool in the furnace to room temperature. It is recommened to repeat the process.

Tools made from BD2A that have been heavily machined, ground or otherwise subjected to cold work should be stress relieved before hardening. Heat the steel to 600-650°C and soak well. Cool in the furnace or in air.

Heat the BD2A tool steel component to 750-800°C. and allow to soak at this temperature. The tools may then be brought up to 980-1030°C. Soak thoroughly for thirty minutes per 25mm of ruling section, then cool or quench accordingly.

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each BD2A steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of tool steels.

Temper the BD2A component with the least possible delay after hardening, preferably when the steel is still hand warm. Select a suitable tempering temperature between 150-220°C or 450-550°C. Use the lower tempering range is when maximum hardness is required and the higher tempering range should when maximum toughness is required. When the steel has reached the required temperature, soak for at least one hour per 25mm of section. Double tempering is recommended.

BS4659 BD2 tool steel is supplied in accordance with our ISO 9001:2015 registration.