Al-alloyed nitriding steel grade for large-sections.
Application
Structural parts with high surface hardness - piston rods, extruders, cylinders, shafts, straightening tools, measuring tools, etc.
Related Products
Related specifications:
Germany W.Nr. 1.8509
DIN 41CrAlMo7
Great Britain EN 41B
B.S. 905M39
France AFNOR 40CAD6,12
Italy UNI 41CrAlMo7
Belgium NBN 41CrAlMo7
Sweden SS 2940
Spain UNE 41CrAlMo7
Process: EAF/LD+LF+VOD+ hot Forged/hot rolled+Heat Treatment(optional)
SIZE RANGE:
Round: Dia 10mm - 1200mm
SURFACE FINISHES:
Black, grinded, turned
Ultrasonic test: According to SEP 1921-84
Soft Annealing
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell hardness of 248.
Hardening
Harden from a temperature of 870-930oC followed by oil/polymer or water quenching.
Tempering
Tempering temperature: 580-700oC.
Forging
Hot forming temperature: 1050-850oC.
Chemical Composition:
|
Grade
|
C
|
Mn
|
P
|
S
|
Si
|
Cr
|
Mo
|
Al
|
|
41CrAlMo7
|
0.38-
0.45
|
0.40-
0.70
|
0.025
max
|
0.035 max
|
0.40
max
|
1.50-
1.80
|
0.20-
0.35
|
0.80-
1.20
|
Mechanical properties of grade 41CrAlMo7 (1.8509)
|
Nominal thickness (mm):
|
16 - 40
|
40 - 100
|
100 - 160
|
160 - 250
|
|
|
|
|
|
|
|
Rm - Tensile strength (MPa) (+QT)
|
950-1150
|
900-1100
|
850-1050
|
800-1000
|
|
Nominal thickness(mm):
|
16 - 40
|
40 - 100
|
100 - 160
|
160 - 250
|
|
|
|
|
|
|
|
Rp0.2 0.2% proof strength (MPa) (+QT)
|
750
|
720
|
670
|
625
|
