Chrome Molybdenum Steel, Chromium-Molybdenum Steels (SCM 440)

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External Diameter Accuracy: f8
Surface Roughness: Ra0.2 μm ~ Ra0.4 μm
Hard Chrome Thickness: 20 Micron ±10%
Surface Hardness: HV 850 (Minimum) up
Straightness:0.15-0.25/1000mm
Standard Length: 3M - 6M
Standard Size: 10Φ ~ 200Φ
Material: JIS G4105(SCM440), SAE4140, DIN17204

Purpose:

Chrome Molybdenum Steel (Chromium-Molybdenum Steels) is the operation for auto parts, injection machine, hydraulic machine, tie bars.

Tolerance Of Piston Rod

Grade of tolerance 
Dia mm Φ
fgh
f7f8g6h7h8h9
3mm -0.006
-0.016
-0.006
-0.020
-0.002
-0.008
0
-0.010
0
-0.014
0
-0.025
3mm-6mm -0.010
-0.022
-0.010
-0.028
-0.004
-0.012
0
-0.012
0
-0.018
0
-0.030
6mm-10mm -0.013
-0.028
-0.013
-0.035
-0.005
-0.014
0
-0.015
0
-0.022
0
-0.036
10mm-18mm -0.016
-0.034
-0.016
-0.043
-0.006
-0.017
0
-0.018
0
-0.027
0
-0.043
18mm-30mm -0.020
-0.041
-0.020
-0.053
-0.007
-0.020
0
-0.021
0
-0.033
0
-0.052
30mm-50mm -0.025
-0.050
-0.025
-0.064
-0.009
-0.025
0
-0.025
0
-0.039
0
-0.062
50mm-80mm -0.030
-0.060
-0.030
-0.079
-0.010
-0.029
0
-0.030
0
-0.046
0
-0.074
80mm-120mm -0.036
-0.071
-0.036
-0.090
-0.012
-0.034
0
-0.035
0
-0.054
0
-0.087
120mm-180mm -0.043
-0.083
-0.043
-0.106
-0.014
-0.039
0
-0.040
0
-0.063
0
-0.100
180mm-250mm -0.050
-0.096
-0.050
-0.122
-0.015
-0.044
0
-0.046
0
-0.072
0
-0.115
250mm-315mm -0.056
-0.108
-0.056
-0.137
-0.017
-0.049
0
-0.052
0
-0.081
0
-0.130
315mm-400mm -0.062
-0.119
-0.062
-0.151
-0.018
-0.054
0
-0.057
0
-0.089
0
-0.140
400mm-500mm -0.068
-0.131
-0.068
-0.165
-0.020
-0.060
0
-0.063
0
-0.097
0
-0.155

(unit)µ=0.001mm

Chrome Molybdenum Steel, Chromium-Molybdenum Steels

SymbolChemical Analysis (%)Equivalent
AISI No.
CSiMnPSNiCrMo
SCM440 0.38-0.43 0.15-0.35 0.60-0.85 ≤0.030 ≤0.030 0.90-1.20 0.15-0.30 4140

If you are interested in our Chrome Molybdenum Steel (Chromium-Molybdenum Steels), please contact us online. Related Keyword: Hydraulic Piston Rod, Cylinder Piston Rod

Dia mm Φ INQUIRY Dia mm Φ INQUIRY Dia mm Φ INQUIRY Dia mm Φ INQUIRY
10 40 76.2 127
12 45 80 130
14 50 85 135
16 55 90 140
18 56 100 150
20 57.15 101.6 152.4
25 60 105 160
28 63 110 170
30 65 115 177.8
35 70 120 180
36 75 125 200
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