42CrMo4 Hard Hydraulic Piston Connecting Rod For Hydraulic Cylinder

Detailed Product Description

1. Material: 42CrMo4, 40Cr, CK45,ST52,  20MnV6

2. Standard length: 1000mm - 8000mm

3. Tensile strength: Not less than 610 N/MM2

4. Yield strength: Not less than 355 N/MM2

5. Complete manufactured equipment

Detailed Description

1.CHEMICAL COMPOSITION

2.MECHANCIAL PROPERTIES

3. SUPPLY CONDITION

    Ground  and  chrome plated 

4. CHROME THICKNESS

     20 to 30 micron

5. SURFACE ROUGHNESS

     Ra≤0.2 micron and  Rt≤2 micro

6. TOLERANCES ON DIA

    ISO f7 on the diameter

7.OVALITY

Half of the tolerance ISO f7

8. STRAIGHTNESS

   ≤0.2MM/M

9. SURFACE HARDNESS

   850-1150HV (vickers 100g)

10.COHESION

   No cracks,breaking or detaching after thermic shock(warming up at 300 celsius degrees and cooling 

   in water)

11 .POROSITY

     Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10

12 CORROSION RESISTANCE

     Test in natural salt spray according to ASTM B 117-72hours

     Results evaluation according to ISO 4540 RATING 7-10

13. WELDABILITY

      Good

14. PACKING

     Anti rust oil to be applied on material and each rod to be packed in paper sleeve

15. CERTIFICATE

     All certificate related with material heat treatment and plating is required

We have complete manufactured equipment covering all processes. Bought the first continuous chromium plating line of China from Europe in 2015. And cooperated with professional foreign R&D team, got breakthrough on high-performance plating solution, controlling technology of chrome plating thickness, and highly corrosion resistant chrome piston rod which performs even thickness of plating layers. We control quality strictly, from material, peeling, heat treatment, straightening, grinding, polishing, chrome plating and package, every process is controlled and quality is assured.