Material specification sheet
Saarstahl - 20MnCrB5
Material No.:
1.7168
Former brand name:
EC 100 B
International steel grades:
BS:
AFNOR:
SAE:
Material group: Boron alloyed case hardening steel
C Si Mn Cr other
Chemical
composition:
(Typical analysis in %) 0,20 0,25 1,15 1,15 +B (+Pb)
Application: Boron alloyed case hardening steel for parts with a required core ten-
sile strength of 1000 - 1300 N/mm² and good wearing resistance as
bushes, piston bolts, camshafts, spindles, gears, shafts and othe
r
mechanical controlling and gearing components. Boron increases the
hardenability and the toughness of case hardened parts.
Hot forming and
heat treatment:
Forging or hot rolling:
Normalising:
Soft annealing:
Carburising:
Core hardening:
Intermediate annealing:
Case hardening:
Tempering:
1100 - 850°C
840 - 870°C/air
650 - 700°C/furnace
870 - 930°C/oil
850 - 880°C
650 - 700°C
810 - 840°C/oil
170 - 210°C
Mechanical
Properties:
Treated for hardness range - BF
(+TH):
Treated for ferrite and pearlite
structure and hardness range,
+FP:
Soft annealed, +A:
170 - 217 HB
152 - 201 HB
max. 217 HB
