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SAV 220.76 /SAV 242.92 /SAV 243.70 /.71 /
SAV 243.72 /.73 /.76 /.77 /.78 /.79 /.80 /.99
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EN
SAV 220.76 /SAV 242.92 /SAV 243.70 /.71 /
SAV 243.72 /.73 /.76 /.77 /.78 /.79 /.80 /.99
3 TECHNICAL SPECIFICATIONS
Holding force, alloy and heat treatment
High magnetic flux values and therefore the highest holding forces can be achieved in technically pure iron. In
practical application, a number of materials with different magnetic characteristics are used.
In addition to this, heat treatments influence the magnetising capacity of workpieces as this is altered by the
physical structure of the materials. Hardened workpieces have poorer conduction of the magnetic flux.
100%
53%
58%
ho
ld
ing f
or
ce i
n %
annealed tool
steel
hardened tool
steel
tempered tool
steel
0
10
20
30
40
50
60
70
80
90
100
ho
ld
ing f
or
ce i
n %
unmagnetised alloy component in %
0
20
40
60
80
100
0
10
20
30
Fig. 7: Influence of the unmagnetised alloy component
on the holding forces
Fig. 8: Influence of the heat treatment condition on
the holding forces (example)
Short designation as per DIN
Material no.
Max. non-magnetic alloy component
Heat treatment
Holding force
Pure iron
Fe
–
0.00%
soft
100%
Construction steel
St37-2
1.0037
–
soft
95%
St52-3 N
1.0570
–
soft
93%
St50-2
1.0050
–
soft
75%
Case-hardened steel
C10
1.0301
1.22%
soft
93%
C15
1.0401
1.27%
soft
93%
17CrNiMo6
1.6587
5.43%
soft
72%
16MnCr5
1.7131
3.06%
soft
83%
20MnCr5
1.7149
3.40%
soft
82%
C10
1.0301
1.22%
case-hardened
48%
C15
1.0401
1.27%
case-hardened
48%
17CrNiMo6
1.6587
5.43%
case-hardened
38%
16MnCr5
1.7131
3.06%
case-hardened
43%
20MnCr5
1.7149
3.40%
case-hardened
42%
Nitriding steel
34CrAl6
1.8504
4.29%
untreated
77%
31CrMoV9
1.8519
4.65%
untreated
76%
34CrAlNi7
1.8550
5.93%
untreated
70%
39CrMoV13-9
1.8523
6.44%
untreated
68%
34CrAl6
1.8504
4.29%
nitrided
50%
Содержание SAV 220.76
Страница 75: ......