In close cooperation with customers we developed knowledge how to chose right technical specification for particular shape and dimension of the spring to reach high durable dynamic strength. The most important is to minimize inclusion of hydrogen in billets, so they are treated in diffusion annealing furnaces. Hydrogen is controlled during the whole production process.
DIMENSIONS IN TOLERANCES
SPRING STEEL DIN EN 10058
Width
(mm) |
Tolerance
(mm) |
Thickness
(mm) |
Tolerance
(mm) |
|
50-80
|
+- 1
|
d =< 20
|
+- 0.5
|
|
80-100
|
+- 1,5
|
20 < d =< 40
|
+- 1
|
|
100-120
|
+- 2
|
40 < d =< 80
|
+- 1,5
|
|
120-150
|
+- 2,5
|
|
|
|
150-200*
|
+- 3
|
|
|
*not in standard
SPRING STEEL DIN EN 10092-1-B (DIN 4620)
Width
(mm) |
Tolerance
(mm) |
Thickness
(mm) |
|
d <= 10
|
d > 10
|
|
35 - 50
|
+/- 0,3
|
+/- 0,15
|
|
|
55 - 80
|
+/- 0,5
|
+/- 0,15
|
+/- 0,20
|
|
90 - 120
|
+/- 0,7
|
+/- 0,20
|
+/- 0,25
|
|
140
|
+/- 1,0
|
+/- 0,25
|
+/- 0,30
|
SPRING STEEL DIN EN 10092-1-A (DIN 59145)
Width
(mm) |
Tolerance
(mm) |
Thickness
(mm) |
|
d <= 12
|
12 < d =< 18
|
d > 18
|
|
40 - 50
|
+/- 0,3
|
+/- 0,15
|
|
|
|
50 - 80
|
+/- 0,5
|
+/- 0,15
|
+/- 0,20
|
+/- 0,25
|
|
80 - 100
|
+/- 0,6
|
+/- 0,20
|
+/- 0,25
|
+/- 0,30
|
|
100 - 120
|
+/- 0,7
|
+/- 0,20
|
+/- 0,30
|
+/- 0,30
|
SPRING STEEL DIN EN 10092-1-C (DIN 59146)
Width
(mm) |
Tolerance
(mm) |
Thickness
(mm) |
| R = 8 +/- 2 |
R = 12 +/- 2 |
|
22<d=<32
|
32<d=<40
|
0<d=<50
|
50<d=<60
|
|
60 - 80
|
+/- 0,5
|
+/- 0,30
|
+/- 0,45
|
+/- 0,60
|
+/- 0,70
|
|
80 - 100
|
+/- 0,6
|
+/- 0,30
|
+/- 0,45
|
+/- 0,60
|
+/- 0,70
|
|
100 - 120
|
+/- 0,7
|
+/- 0,30
|
+/- 0,45
|
+/- 0,60
|
+/- 0,70
|
SPRING STEEL BS EN 10089 (BS 970 2-B)
Width
(mm) |
Tolerance
(mm) |
Thickness tolerance
(mm)
over 30 mm
up to 32 mm |
|
60-75
|
+/- 0.50
|
+/- 0.30
|
|
75-100
|
+/- 0,50
|
+/- 0,40
|
|
100-120
|
+/- 0,70
|
+/- 0,40
|
SPRING STEEL GRADES AND PROPERTIES
| Grade |
Chemical
composition
% (min-max) |
Yield
strength
(N/mm2) |
Tensile
strength
(N/mm2) |
Elasticity
(%) |
Impact test
min (J)
Iso V
+20°C |
56Si7
EN 56Si7
DIN 55Si
UK 251A58
FRA 55S7
|
C=0,52-0,60
Si=1,50-1,80
Mn=0,50-0,80
|
1160
|
1350
-
1600
|
6
|
13
|
561SiCr7
EN 61SiCr7
DIN 60SiCr7
FRA 60SC7
|
C=0,57-0,64
Si=1,60-2,00
Mn=0,60-0,90
Cr=0,20-0,40
|
1250
|
1450
-
1700
|
5
|
10
|
55Cr3
EN 55Cr3
DIN 55Cr3
UK 525A60
FRA 55C3
|
C=0,52-0,59
Si=0,15-0,40
Mn=0,70-1,000
Cr=0,60-0,90
|
1180
|
1380
-
1630
|
6
|
12
|
52CrMoV4
EN 52CrMoV4
DIN 51CrMoV4
FRA 51CrMoV4
|
C=0,48-0,56
Si=0,20-0,40
Mn=0,75-0,85
Cr=0,90-1,00
Mo=0,15-0,25
V=0,08-0,15
|
1300
|
1450
-
1750
|
7
|
15
|
51CrV4
EN 51CrV4
DIN 50CrV4
UK 735A51
FRA 51CrV4
|
C=0,47-0,55
Si=0,15-0,40
Mn=0,70-1,00
Cr=0,90-1,20
V=0,10-0,20
|
1250
|
1350
-
1650
|
6
|
15
|
|
