ALTA 1.2365 steel comes with lesser content of carbon C%, chromium Cr% compared with ALTA 1.2343 / H11 steel, ALTA 1.2344 / H13 steel, but greatly increased molybdenum Mo% which brings very high hot hardness (red hardness) and resistance against thermal fatigue cracking (heat-cracking). It's an ideal material for die closed and open-die forging.
It can be also used as structural parts for aircraft, rockets and other heat-resistant operating temperatures of ~ 400 to 500°C.
Applications
²Die-casting molds (copper alloy, brass etc)
²Tools for hot cutting, for cutting thorns and trimming dies
Chemical composition
Chemical Composition per %
C
Si
Mn
P
S
Cr
Mo
V
Ni
Cu
Min.
0.28
0.10
0.15
2.70
2.50
0.40
Max.
0.35
0.40
0.45
0.020
0.010
3.20
3.00
0.70
0.25
0.25
Basic melting process :
IM/EAF + LF + VD + ESR (EFS-annealing)
Hardness :
Max 229 HB (annealed)
Reduction ratio :
5 : 1 minimum or required
Grain size :
≥ 6.0 per ASTM E112
Non-metallic inclusion :
≤ 1.0 (thick), ≤ 1.5 (thin) per ASTM E45 method A (more pure by ESR route)
