Cold work tool steel plates D2 ( 1.2379 )
AISI D2 ( 1.2379 ) Cold Work Tool Steel air or oil hardening, with maximum dimensional stability during heat treatment,
offering very high hardness and abrasion resistance. Generally supplied annealed to HB 250 max.
Typical chemical analysis ( weight % )
Deep drawing and forming dies, cold drawing punches, hobbing, blanking, lamination and stamping dies,
shear blades, burnishing rolls, master tools and gauges, slitting cutters, thread rolling & wire dies, extrusion dies etc.
at 900°c – 1100°c
Cool slowly and anneal immediately
at 830°c – 860°c
Cool in furnace
at 650°c – 700°c
Cool in furnace or still air
Preheat at 650°c – 850°c Raise to 1000°c–1050°c
Cool in air, oil or into hot bath held at 500°c – 550°c and then air cool
at 150°c – 400°c Cool in still air
Triple tempering recommended
Typical Hardness / Applications – Air cooled at 1000°c-1050°c & tempered.
* Heat treatment and typical hardness for guidance only
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