ALTA 1.4021/20Cr13 is a high Chromium martensitic stainless steel. This steel have high strength and toughness, good corrosion resistance and machinability after quenching and tempering.
Applications
²Making parts that bear high stress loads, such as turbine blades, hot oil pump shafts and sleeves, impellers, hydraulic press valves, etc
²Also used in the paper industry and medical device, household appliances, tableware, etc
Chemical composition
Chemical Composition per %
C
Si
Mn
P
S
Cr
Ni
Cu
Min.
0.16
12.0
Max.
0.25
1.00
1.00
0.030
0.030
14.0
0.25
0.30
Basic melting process :
IM/EAF + LF + VD + (ESR)
Hardness :
Max 230 HB (annealed)
Reduction ratio :
5 : 1 minimum or required
Grain size :
≥ 5.0 per ASTM E112
Non-metallic inclusion :
≤ 1.0 (thick), ≤ 1.5 (thin) per ASTM E45 method A (more pure by ESR route)
