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42CrMo Hydraulic Cylinder Hollow Piston Rod Hard Chrome Plated Steel Bar Neutral Salt Spray test 500 hours
NSS( Salt Spray test )Testing Standing une-en iso9227:2017
· Sal solution: 50 (+/- 5) g/l of NaCl. Water is demineralized and salt purity is 99.5%.
· Environmental temperature: 35 °C.
· pH of salt solution is 6.8.
· Volumen of salt solution is 38.4 ml/day.
· Density of salt solution is 1,030 g/cm3.
· Spraying is 1.5 (+/- 0.5) ml/h.
Test Result :NSS can endure 300 hours ;500 hours; 800 hours
TUV NSS Testing Report SGS NSS Testing Report
Applications:
Single-acting/double-acting hydraulic cylinders --- Garbage trucks, dump trucks, agricultural equipment, ships, mines, drilling platforms, machinery in harsh environments
Crafts Process Hardening Force Remove
In the whole crafts process, there are 2 times remove hardening forces: the first remove hardening force in the heat treatment process, hardening force remove is about 80%; the second remove hardening force in the surface treatment process, hardening force remove is about 90%-95%. Therefore, the piston rod is not easily deformed during use or transportation.
Detail
| Color | Black |
| Type | Hollow/Solid Rod |
| Application Environment | At sea or in harsh environments |
| Surface hardness | ＞HV860 |
| SURFACE ROUGHNESS | Ra≤0.2 micron and Rt≤2 micro |
| OLERANCES ON DIA | ISO f10 on the diameter |
| LENGTH | MAX 5 meter |
| specification | φ3-φ12 | φ16-φ25 | φ30-φ50 | φ55-φ100 | φ105-φ120 | |
| Length | 200-2000 | 200-3000 | 200-5000 | 200-10000 | 1000-10000 | |
|
NSS (Neutral Salt Spray test)
| More than 240 hours ; more than 360 hours; more than 500 hours ; more than 100 hours; | |||||
| Surface hardness | >860 HV0.1 | The straightness | 0.15/1000mm | |||
| Accuracy | g6 grade h7 grade | Hardened layer depth | 0.8-3mm | |||
| Roundness tolerance |
<=0.01 | APT thickness | 10um-40um | |||
| Full length tolerance |
<=0.02 | The materiel | 42CrMo4 | |||
| Surface roughness |
Ra 0.2- 0.4 | |||||
| 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 | ||||||||||||||||||||||||||||||||||||||||||||
| ST52 | 0.22 | 1.6 | 0.55 | 0.035 | 0.04 | ||||||||||||||||||||||||||||||||||||||||||||
| 20MnV6 | 0.16-0.22 | 1.30-1.70 | 0.10-0.50 | 0.035 | 0.035 | 0.10-0.20 | |||||||||||||||||||||||||||||||||||||||||||
| 42CrMo4 | 0.38-0.45 | 0.60-0.90 | 0.15-0.40 | 0.03 | 0.03 | 0.90-1.20 | |||||||||||||||||||||||||||||||||||||||||||
| 40Cr | 0.37-0.45 | 0.50-0.80 | 0.17-0.37 | 0.80-1.10 | |||||||||||||||||||||||||||||||||||||||||||||
| MECHANCIAL PROPERTIES | |||||||||||||||||||||||||||||||||||||||||||||||||
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