DIN 1.2709

Material Composition

Chemical specifications for this steel involve a low carbon content to ensure weldability and prevent brittleness. Including 18 percent nickel allows for the formation of a ductile martensitic matrix upon cooling from the solution annealing temperature. This microstructural shift is characteristic of din 1.2709 after cooling.

Cobalt and molybdenum then precipitate intermetallic compounds during the aging process. These precipitates increase the yield strength without a severe loss of ductility.

Mechanical Capability

Tensile strength in the aged condition exceeds 1900 MPa for most industrial applications. When components utilize din 1.2709, they withstand high cyclic loads and extreme pressure environments found in injection molding or aerospace tooling. Fatigue resistance remains high due to the fine microstructure achieved through rapid solidification.

Ductility provides a safety margin against sudden failure.

Thermal Processing

Solution annealing typically occurs at 820 degrees Celsius followed by air cooling to room temperature. Subsequent aging at 490 degrees Celsius for several hours triggers the precipitation hardening mechanism. This dual stage sequence ensures that internal stresses from the printing process of din 1.2709 are relieved while the required hardness is attained.

Final part geometry remains stable because the volume change during aging is negligible. Cooling rates must be controlled to avoid the formation of unwanted phases that could compromise the fracture toughness of the finished tool. High thermal conductivity aids in rapid heat dissipation during the actual printing operation.