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Additional Information
-Spring Steel Chemical Composition
|
Symbol
of Class
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
V
|
B
|
Remark
|
|
SPS1(KS)
|
0.75-0.90
|
0.15-0.35
|
0.30-0.60
|
0.035Max
|
0.035Max
|
-
|
-
|
-
|
-
|
SUP3(JIS)
|
|
SPS3(KS)
|
0.56-0.64
|
1.50-1.80
|
0.70-1.00
|
0.035Max
|
0.035Max
|
-
|
-
|
-
|
-
|
SUP6(JIS)
|
|
SPS4(KS)
|
0.56-0.64
|
1.80-2.20
|
0.70-1.00
|
0.035Max
|
0.035Max
|
-
|
-
|
-
|
-
|
SUP7(JIS)
SAE 9260
|
|
SPS5(KS)
|
0.52-0.60
|
0.15-0.35
|
0.65-0.95
|
0.035Max
|
0.035Max
|
0.65-0.95
|
-
|
-
|
-
|
SUP9(JIS)
|
|
SPS5A(KS)
|
0.56-0.64
|
0.15-0.35
|
0.70-1.00
|
0.035Max
|
0.035Max
|
0.70-1.00
|
-
|
-
|
-
|
SUP9A(JIS)
SAE 5160
|
|
SPS6(KS)
|
0.47-0.55
|
0.15-0.35
|
0.65-0.95
|
0.035Max
|
0.035Max
|
0.80-1.10
|
-
|
0.15-0.25
|
-
|
SUP10(JUS)
|
|
SPS7(KS)
|
0.56-0.6A
|
0.15-0.35
|
0.70-1.00
|
0.035Max
|
0.035Max
|
0.70-1.00
|
-
|
-
|
0.0005
Min
|
SUP11A(JUS)
|
|
SPS8(KS)
|
0.51-0.59
|
1.20-1.60
|
0.60-0.90
|
0.035Max
|
0.035Max
|
0.60-0.90
|
-
|
-
|
-
|
SUP12(JUS)
|
|
SPS9(KS)
|
0.56-0.64
|
0.15-0.35
|
0.70-1.00
|
0.035Max
|
0.035Max
|
0.70-0.90
|
0.25-0.35
|
-
|
-
|
SUP13(JUS)
|
|
SAE
9254
|
0.51-0.59
|
1.20-1.60
|
0.60-0.80
|
0.035Max
|
0.035Max
|
0.60-0.80
|
-
|
-
|
-
|
SUP12A(JUS)
|
|
EN48
(BS)
|
0.45-0.55
|
0.10-0.50
|
0.50-0.80
|
0.050Max
|
0.050Max
|
1.00-1.40
|
-
|
-
|
-
|
-
|
|
EN47
(BS)
|
0.45-0.55
|
0.50Max
|
0.50-0.80
|
0.050Max
|
0.050Max
|
0.80-1.20
|
-
|
0.15Min
|
-
|
-
|
|
50Cr
V4(DIN)
|
0.47-0.55
|
0.14-0.35
|
0.80-1.10
|
0.035Max
|
0.035Max
|
0.90-1.20
|
0.10-0.20
|
-
|
-
|
-
|
|
58Cr
V4(DIN)
|
0.55-0.62
|
0.55-0.62
|
0.80-1.10
|
0.035Max
|
0.035Max
|
0.90-1.20
|
-
|
0.07-0.12
|
-
|
-
|
-Mechanical Properties
|
Symbol
of Class
|
Heat
Treatment(°C)
|
Tensile
Test
|
Hardness
Test
|
|
Quenching
|
Tempering
|
Yield
Strength
|
Tensile
Strength(kg/)
|
Elongation(%)
|
Reduction
of (%)
|
HB
|
|
SPS
1
|
830-860
|
450-500
|
85Min
|
110Min
|
8Min
|
-
|
341-401
|
|
SPS
3
|
830-860
|
480-530
|
110Min
|
125Min
|
9Min
|
20Min
|
363-429
|
|
SPS
4
|
830-860
|
490-540
|
110Min
|
125Min
|
9Min
|
20Min
|
363-429
|
|
SPS
5
|
830-860
|
460-510
|
110Min
|
125Min
|
9Min
|
20Min
|
363-429
|
|
SPS
5A
|
830-860
|
460-520
|
110Min
|
125Min
|
9Min
|
20Min
|
363-429
|
|
SPS
6
|
840-870
|
470-540
|
110Min
|
125Min
|
10Min
|
30Min
|
363-429
|
|
SPS
7
|
830-860
|
460-520
|
110Min
|
125Min
|
9Min
|
20Min
|
363-429
|
|
SPS
8
|
830-860
|
510-570
|
110Min
|
125Min
|
9Min
|
20Min
|
363-429
|
|
SPS
9
|
830-860
|
510-570
|
110Min
|
125Min
|
10Min
|
30Min
|
363-429
|
|
SAE
9254
|
830-860
|
510-570
|
110Min
|
125Min
|
9Min
|
20Min
|
363-429
|
|
|
|
|
| |
|
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|
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