Meaning
Chromium-hot-work steel alloys engineered for high-temperature tooling applications offer high toughness and resistance to thermal shock. Mold designers specify din 1.2344 steel for high-strain injection molds, hot runner blocks, and extrusion dies that must withstand cyclic thermal loads. This material resists heat checking and cracking, which are common issues in high-speed molding runs.
It provides the high mechanical strength necessary to withstand the clamping and injection forces of large-scale molding machines.
Thermal Stability
Toughness and hardness are maintained at elevated temperatures due to vanadium and molybdenum alloying additions. In din 1.2344 steel, these carbide-forming elements prevent softening when heated. This thermal stability ensures that the mold retains its dimensions and strength during high-temperature molding cycles.
Stress Relief
Proper heat treatment is necessary to achieve the desired balance of hardness and impact resistance. Tooling made of din 1.2344 steel is typically hardened to forty-six to fifty-two Rockwell C and tempered several times to relieve internal stresses. This heat treatment stabilizes the steel’s microstructure and prevents cracking under high injection pressures.
Mould Failure
Wear and surface degradation are minimized by applying nitriding or other surface treatment options to the finished mold. These surface modifications increase the surface hardness of din 1.2344 steel to prevent erosion from abrasive resins while the tough core prevents cracking. This combination extends the working life of the mold and reduces maintenance down-time.
