Piston Hollow Chrome Plated Rod Bar NSS 500 Hours 42CrMo 45# For Single Acting Hydraulic Ram

42CrMo Hydraulic Cylinder Piston Hollow Rods Hard Chrome Plated Steel Bar NSS 500 Hours

NSS 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

SGS NSS Testing Report TUV NSSTesting Repopt

Heat treatment

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) ;

straightening equipment:

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

CHEMICAL COMPOSITION

Company Profile :

Dallast Technology Co., Ltd is a leading professional manufacturer of hydraulic cylinder more than 15 years, we are specializing in developing, designing, manufacturing, sales and after sales service of hydraulic cylinder, not only the standard but also OEM products. In order to provide better products to our customers, we make a huge investment to introduce our advanced hydraulic technology at home and abroad, such as CNC machine, automatic cylinder welding equipment, cylinder turning center, plasma cutting machine etc.

Shenzhen Dallast Technology Co ., Ltd. it is hydraulic cylinder manufacturing enterprise integrated with professional designing, production and sales . Company focused, specialized in various types of hydraulic cylinder.Is widely used in dump trucks , dump trailers, garbage trucks, excavators, loaders , forklifts, cranes and other projects , ships, mining machinery and fire engines , sanitation vehicles and other special vehicles, agricultural machinery , heavy machinery and many other fields .