Sav 531.42 Operating Instructions Manual page 77

SAV 531.42 3 TECHNICAL SPECIFICATIONS
Influence of the material on the holding force
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 materials as this is altered by the physical
structure of the materials. Hardened materials have poorer conduction of the magnetic flux.
100
80
60
40
20
0
0
unmagnetised alloy component in %
Fig. 2: Influence of the unmagnetised alloy component
on the holding forces
Short designation as per DIN
Pure iron
Fe
Construction steel
St37-2
St52-3 N
St50-2
Case-hardened steel
C10
C15
17CrNiMo6
16MnCr5
20MnCr5
C10
C15
17CrNiMo6
16MnCr5
20MnCr5
Nitriding steel
34CrAl6
31CrMoV9
34CrAlNi7
39CrMoV13-9
34CrAl6
Version 1.0
10 20 30
Material no. Max. non-magnetic alloy component
–
1.0037
1.0570
1.0050
1.0301
1.0401
1.6587
1.7131
1.7149
1.0301
1.0401
1.6587
1.7131
1.7149
1.8504
1.8519
1.8550
1.8523
1.8504
100
90
80
70
60
50
40
30
20
10
0
annealed tool
steel
Fig. 3: Influence of the heat treatment condition on the
holding forces (example)
0.00 %
–
–
–
1.22 %
1.27 %
5.43 %
3.06 %
3.40 %
1.22 %
1.27 %
5.43 %
3.06 %
3.40 %
4.29 %
4.65 %
5.93 %
6.44 %
4.29 %
[ ]
77
hardened tool tempered tool
steel steel
Heat treatment Holding force
soft 100 %
soft 95 %
soft 93 %
soft 75 %
soft 93 %
soft 93 %
soft 72 %
soft 83 %
soft 82 %
case-hardened 48 %
case-hardened 48 %
case-hardened 38 %
case-hardened 43 %
case-hardened 42 %
untreated 77 %
untreated 76 %
untreated 70 %
untreated 68 %
nitrided 50 %
EN