Steel Bar Chrome Plated Steel Tube 42CrMo4 Hollow Piston Rod For Doubel Acting Hydraulic Cylinder

42CrMo4 Hollow Piston Rod Hard Chrome Plated Steel Bar For Doubel Acting Hydraulic Cylinder NSS 500 hours

Type:Hollow/Solid Rod

Material :45# 42CrMo

Color :Black

NSS (Neutral Salt Spray test): More than 200 hours;

                                                 More than 360 hours;

                                                  More than 500 hours;

                                                  More than 100 hours;

Application Environment:At sea or in harsh environments Surface hardness:＞HV870

SURFACE ROUGHNESS:Ra≤0.2 micron and Rt≤2 micro

TOLERANCES ON DIA:ISO f10 on the diameter

LENGTH:MAX 5 meter

NSS Testing Standing une-en iso9227:2017(Neutral Salt Spray test)

· 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

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.