1. CHEMICAL COMPOSITION
|
Material
|
C%
|
Mn%
|
Si%
|
S%
|
P%
|
V%
|
Cr%
|
|
CK45
|
0.42-0.50
|
0.50-0.80
|
≤0.04
|
≤0.035
|
0.035
|
|
≤ 0.25
|
|
ST52
|
≤0.22
|
≤1.6
|
≤0.55
|
≤0.04
|
≤0.04
|
|
|
|
20MnV6
|
0.16-0.22
|
1.30-1.70
|
0.10-0.50
|
≤0.035
|
≤0.035
|
0.10-0.20
|
≤0.30
|
|
42CrMo4
|
0.38-0.45
|
0.60-0.90
|
0.15-0.40
|
≤0.035
|
≤0.035
|
0.07-0.12
|
0.90-1.20
|
|
40Cr
|
0.37-0.45
|
0.50-0.80
|
0.17-0.37
|
≤0.035
|
≤0.035
|
|
0.80-1.10
|
2. MECHANCIAL PROPERTIES
|
Material
|
T.S
N/MM2
|
Y.S
N/MM2
|
E%(MIN)
|
CHARPY
|
CONDITION
|
|
CK45
|
610
|
355
|
15
|
>41J
|
NORMALIZE
|
|
CK45
|
800
|
630
|
20
|
>41J
|
Q + T
|
|
ST52
|
500
|
355
|
22
|
|
NORMALIZE
|
|
20MnV6
|
750
|
590
|
12
|
>40J
|
NORMALIZE
|
|
42CrMo4
|
980
|
850
|
14
|
>47J
|
Q + T
|
|
40Cr
|
1000
|
800
|
10
|
|
Q + T
|
3. SUPPLY CONDITION
Ground and chrome
plated , induction, quenched and tempered
4. CHROME THICKNESS
20 to 30 micron
5. SURFACE ROUGHNESS
Ra≤0.2 micron
and Rt≤2 micro
6. TOLERANCES ON DIA
ISO f7 on the
diameter
7.OVALITY
Half of the tolerance ISO f7
8. STRAIGHTNESS
≤0.2MM/M
9. SURFACE HARDNESS
850-1150HV (vickers 100g)
10.COHESION
No cracks,breaking or
detaching after thermic shock(warming up at 300 celsius degrees and cooling in
water)
11 .POROSITY
Test according
to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10
12 CORROSION RESISTANCE
Test in natural
salt spray according to ASTM B 117-72hours
Results
evaluation according to ISO 4540 RATING 7-10
13. PACKING
Anti rust oil
to be applied on material and each rod to be packed in paper sleeve
