|Place of Origin:||CHINA|
|Minimum Order Quantity:||1|
|Packaging Details:||Wooden box|
|Material:||45# 42CrMo 40Cr 40CrMo4||Color:||Black|
|NSS:||Endure1000 Hours||Type:||Hollow/Solid Rod|
|Application Environment:||At Sea Or In Harsh Environments||Surface Hardness:||＞HV850|
40Cr 40Crmo4 42CrMo Piston Hollow Rods Hard Chrome Plated Steel Bar For Hydraulic Ram NSS 1000 Hours
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|Scheduling axis hardness||HB220-280|
|Surface hardness||>860 HV0.1||The straightness||0.15/1000mm|
|Accuracy||g6 grade h7 grade||Hardened layer depth||0.8-3mm|
|Full length tolerance||
|Surface roughness||Ra 0.2- 0.4
2. After quenching, put into the oil tank to cool from the box furnace
3. After cooling, the first time tempering: tempered at 640 °C and the hardness is controlled at about HRC28-32, the first time tempering cooling is used Water-cooled.
4. Straightening: The outer circle is controlled by 200 um(0.2mm) ;
three-roller straightening machine；
hydraulic straightening machine (multipoint straightening)
5. The second tempering removes the hard force, the temperature is about 480 °C, and Keep warm for 2 -2.5hours ; release 80% more or less
NSSTesting Standing 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
SGS NSS Testing Report TUV NSSTesting Repopt
Main hydraulic cylinder parts:
Precision cold drawn steel, honing steel, precision piston rod, hydraulic cylinders and various hydraulic system design and manufacturing. The company has a professional production plant, for many years engaged in hydraulic engineering research and design experts and have rich practical experience in engineering and technical personnel, a dedicated production equipment, advanced production technology, and improve the quality assurance system to ensure product quality , With the best after-sales service for customers value.
Contact Person: Aaron