Meaning
Tool steel of high purity produced through electroslag remelting is designed for high-stress injection moulds. The use of 1.2343 ESR is standard in tooling where high thermal fatigue resistance and excellent polishability are required. This material avoids the micro-segregation of carbides and achieves uniform mechanical properties in both longitudinal and transverse directions.
Material Purity
Electroslag remelting removes non-metallic inclusions and ensures an exceptionally clean microstructure. Tooling manufactured from 1.2343 ESR demonstrates superior resistance to thermal shock and gross cracking during rapid moulding cycles. Polishing of the cavity to a mirror finish is simplified because the steel holds fewer microscopic voids.
Thermal Conductance
High thermal conductivity ensures rapid heat dissipation from the melt. Steel like 1.2343 ESR balances mechanical strength with this thermal response. Part cycle times fall.
Tooling Longevity
Extended production runs and millions of moulding cycles are achievable when the mould inserts resist thermal fatigue. Wear resistance of 1.2343 ESR prevents the gradual degradation of shut-off surfaces and gates, which otherwise leads to parting-line flash or dimensional drift. Correct heat treatment yields a stable hardness of 48 to 52 Rockwell C without brittleness.
Stable hardness ensures that the critical dimensions of the moulded parts remain well within tolerance over years of continuous production.
