Formadur - SCHMOLZ-BICKENBACH.US

Formadur 2162
21MnCr5
C 0.21 Mn 1.30 Cr 1.20
Steel properties
Standards
Physical properties
Case hardening steel, good polishability, suitable for cold hobbing.
AISI ~P2
Coefficient of thermal expansion
at °C 20 – 100 20 – 200 20 – 300 20 – 400 20 – 500 20 – 600 20 – 700
10 -6 m/(m • K) 12.2 12.9 13.5 13.9 14.2 14.5 14.8
Thermal conductivity
at °C 20 350 700
W/(m • K) 39.5 36.5 33.5
Applications
Heat treatment
Mirror-finished plastic moulds and guide pins.
Soft annealing °C Cooling Hardness HB
670 – 710 Furnace max. 210
Carburizing °C Intermediate Hardening °C Quenching Surface hardness
annealing °C
after quenching HRC
870 – 900 620 – 650 810 – 840 Oil or saltbath, 62
180 – 220 °C
Tempering °C 100 200 300 400 500 600
HRC 61 60 57 54 50 48
Time-temperaturetransformation
diagram
1200
1100
1000
Temperature in °C
900
800
Ac 3
Ac 1
65
700
60 60 60 60
60
F
10 25 35
600
40 P 4040 40 40 35
A
50
500
M B
S
50
87
400
80 65
60
55
300
M
45
15
200
100 Hardness
171
HV 10
405 342 302 274 253 238 212 187 160 182 162 153
0
10 0 10 1 10 2 10 3 10 4 10 5 10 6
Time in s
100 101 102 103 104
Time in min
100 101 102
Time in h
Tempering diagram
70
66
62
58
Hardness in HRC
54
50
46
42
38
34
30
0 100 200 300 400 500 600 700 800
Tempering temperature in °C