Chemical Composition and Machine Function of 42CrMo
1) The chemical composition of the material：
|
No |
The chemical composition % |
|
C |
Si |
Mn |
Mo |
Cr |
Ni |
S |
P |
Cu |
|
42CrMo |
0.38~0.45 |
0.17~0.37 |
0.50~0.80 |
0.15~0.25 |
0.90~1.2 |
≤0.30 |
≤0.035 |
≤0.035 |
≤0.30 |
|
(Note: The chemical composition of the other material must obey the standard set by the country, the allowed dispersion of the chemical composition must accord to the provision of GB222 ) |
2) Microstructure
|
Steel No |
Center osteoporosis |
General osteoporosis |
Segregation |
Subcutaneous bubble |
Intergranular crack |
|
Level is not more than |
No allow |
|
42CrMo |
2.0 |
2.0 |
2.0 |
|
(Note: Free rough loose center can not) |
3)Machine function:
Central roued piece of rough mechanical properties
|
Steel No |
Delivery status |
Wall thickness
Mm |
Tensile strength
σ b MPa |
Elongation
δ 5 % |
Section shrinkage
ψ % |
|
42CrMo |
Quenched |
≤70 |
785 |
12 |
40 |
Slewing Bearing Parts:
Isolation Block: Material PA1010Resin
Seal Ring: Material NBR( nitrile rubber buna)
Steel Ball: Material GCr15
Lubrication grease: No.2 EP grease (GB7324-1994)
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