Material No.:
Code:
DE - Brand:
1.2714 55NiCrMoV7
Chemical composition:
(Typical analysis in %)
A50
C
Cr
Mo
Ni
V
0,55
1,10
0,50
1,70
0,10
Steel properties:
Ni alloyed die steel with excellent toughness and good
through hardening properties. Similar to AISI L6.
Applications:
Standard material for forging dies, hot shear knives,
punches, backing plates, die holders, hot punching tools.
Condition of delivery:
a) Soft annealed to max. 248 HB
b) Quenched and tempered, 1100 - 1350 N/mm²
Physical properties:
Thermal expansion coefficient
Thermal conductivity
10-6⋅m
20-100°C
20-300°C
20-500°C
20-600°C
m⋅K
12,3
13,4
14,1
14,4
W
20°C
350°C
700°C
m⋅K
35,9
38,2
34,8
Heat treatment:
Soft annealing
Stress relief annealing
The recommendation 600 - 650°C is valid for the soft
annealed condition.
05/06
Hardening
Temperature
Cooling
Hardness
650 - 700°C
furnace
max. 248 HB
Temperature
Cooling
600 - 650°C
furnace
Temperature
Cooling
Tempering
840 - 890°C
oil, pressure gas (N2),
air
see tempering
diagram
Dörrenberg Edelstahl GmbH · Hammerweg 7 · D-51766 Engelskirchen
Tel.: +49 22 63 / 79 1 · Fax: +49 22 63 / 79 20 5 · www.doerrenberg.de
A company of the
GESCO group
(1.2714) Thermal Cycle Diagram
600-650°C
Tempering
hardening temperature
2nd preheating
step
½ min. / mm
~650°C
Finish
machining
cooling slowly
in furnace
Hardening
Intermediate
machining
Temperature
Rough
machining
Stress relief annealing
cooling
oil, air, pressure
gas (N2)
1st preheating
step
½ min. / mm
~400°C
tempering
1 h / 20 mm
at least 2 h
equalisation
1 h / 100 mm
Time
Continuous Cooling Transformation Diagram (CCT)
Austenitizing temperature: 850°C
1200
Temperature [°C]
1000
Ac1e
800
600
15
A+C
400
B
Ms
200
15
88
P
100
Ac1b
80
M
760
0
0,1
1
10
10
2
758
705
3
10
Time [s]
450
10
4
380 HV 240
10
5
10
6
Tempering Diagram
70
65
Hardness [HRc]
60
55
50
45
40 Test specimen:
= 30 mm, h = 40 mm
35 quenched from 870°C
in oil
30
0
100
200
300
400
500
Tempering temperature [°C]
Remarks: All technical information is for reference only.
600
700