42CrMo Pneumatic Piston Rod, Hard Chromium Precision Ground Shaft Bar
42CrMo piston bar for hydraulic machine
Detailed Product Description
1. material:42CrMo
2. ground and chrome plated
3. advanced inspection apparutus
4. IS09001:2008
Detailed Description
1.CHEMICAL COMPOSITION
|
Material |
C% |
Mn% |
Si% |
S% |
P% |
V% |
Cr% |
|
42CrMo |
0.38-0.45 |
0.60-0.90 |
0.15-0.40 |
0.03 |
0.03 |
|
0.90-1.2 |
2.MECHANCIAL PROPERTIES
|
Material |
T.S N/MM2 |
Y.S N/MM2 |
E%(MIN) |
CHARPY |
CONDITION |
|
42CrMo |
980 |
850 |
14 |
>47J |
Q + T |
3. SUPPLY CONDITION
Ground and chrome plated
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. WELDABILITY
