Chemical Composition (AISI P-20+Ni)
Good machinability, suitable for chemical etching, better hardenability than THYROPLAST® 2311. Used for all thicknesses Good polishability. Guaranted through hardness: 290 HB or 100 kg/mm2 minimum.
Large plastic moulds with deep engravings and intensive impacts on the core. 1.2738 is the logical development of 1.2311, a pre-hardened plastic mould steel for use in large moulds, which also have to display high core strength. The additional nickel content of 1 % increases through hardening. 1.2738 ia a micro-alloyed, vacuum-degassed steel with the following excellent features:
good machinability, outstanding polishability, good texturing properties.
Soft Annealing Cooling Hardness(HB)
700 – 730 Furnace Max 230
Hardening Quenching Hardness after quenching (HRC)
835 - 865 Polymer or Oil 50
Tempering C 100 200 300 400 500 600 700
HRC 51 50 48 46 42 39 28