1.4021
X20Cr13
stainless steel; corrosion resistant steel; martensite
1.4021 Datasheet
X20Cr13
stainless steel; corrosion resistant steel; martensite
The material 1.4021 is a martensitic chromium steel with good mechanical properties. Thanks to its mirror polishability, this material is ideally suited as a knife steel.
Composition
C
Si
Mn
P
S
Cr
min.
0,16
-
-
-
-
12,00
max.
0,25
1,00
1,50
0,040
0,015
14,00
C
min.
0,16
max.
0,25
Si
max.
1,00
Mn
max.
1,50
P
max.
0,040
S
max.
0,015
Cr
min.
12,00
max.
14,00
Standards and designations
Material group
Stainless steel
AFNOR
Z20C13
AISI/SAE
S42000; 420
B.S.
420S37
JIS
SUS420Ja
UNS
S42000
Fields of application
Automotive industry
Power engineering
Turbine construction, power plant construction
Medical technology, pharmaceuticals
Mechanical engineering
Chemistry, petrochemistry
Cutting industry
Fasteners
Architecture & Decoration
Attributes
Physical properties at 20° C
Density
7,70 kg/dm³
Specific heat
460 J/kg K
Thermal conductivity
30 W/m K
Electrical resistance
0,60 (ohm) mm²/m
Magnetizability
present
Thermal treatment
Hot forming
800 - 1100 °C
Soft annealing
745 - 825 °C
Hardening (oil, air)
950 - 1050 °C
Tempering
600 - 750 °C
1.4021 is only moderately weldable even with filler metal; additional heat treatment is recommended.
Delivery forms
Angle/profile
Cut to size/custom made
Flat
Hexagon
Profile tube
Round
Round tube/bushing
Slit strip
Square