1.8550
34CrAlNi7-10; 34CrAlNi7
high-grade structural steel; alloyed; nitriding steel
Energy & environmental technology, Vehicle construction & e-mobility
1.8550 is a CrAlNi-alloyed nitriding steel which, due to its high wear resistance, is used for such stressed. It is used in mechanical engineering for parts subjected to such stresses due to its high wear resistance.
Composition
C
Si
Mn
P
S
Al
Cr
Mo
Ni
min.
0,30
-
0,40
-
-
0,800
1,50
0,15
0,85
max.
0,37
0,40
0,70
0,025
0,030
1,200
1,80
0,25
1,15
C
min.
0,30
max.
0,37
Si
max.
0,40
Mn
min.
0,40
max.
0,70
P
max.
0,025
S
max.
0,030
Al
min.
0,800
max.
1,200
Cr
min.
1,50
max.
1,80
Mo
min.
0,15
max.
0,25
Ni
min.
0,85
max.
1,15
Standards and designations
Material group
Nitriding steel
AFNOR
34CrAlNi7
AISI/SAE
A355 (C)
B.S.
34CrAlNi7
UNS
K52440
Special designations
Alloy 625; Inconel® 625
Fields of application
Mechanical engineering
Plastics processing
Automotive industry
Plant engineering
Engine and piston construction
Drive technology
Attributes
Physical properties at 20° C
Density
7.60 kg/dm³
Specific heat
420 J/kg K
Thermal conductivity
42,6 W/m K
Electrical resistance
0.19 (ohm) mm²/m
Modulus of elasticity
210 kN / mm²
Important properties
High wear resistance
heat-treatable
especially for large cross sections
surface hardenable
difficult to weld
Delivery forms
Cut to size/custom made
Flat
Hexagon
Round
Round tube/bushing
Slit strip
Square