Induction hardened chrome plated bar Overview
Induction hardening of piston rods in hydraulic cylinders is applied to increase the resistance to damage from external impact in applications where there is risk for them.
As one of the first level chrome plated bar manufacturers & suppliers, our factory has been manufacturing & supplying Induction Hardened Chrome Plated Rods /bars/shafts for more than 25 years, our hard chrome plated rod and Induction Hardened Chrome Plated Bar are widely used in hydraulic cylinders and pneumatic cylinders.
Induction hardened chrome plated bar Detailed Description
The Induction hardened chrome plated bar results in a superior impact resistant bar ideal for high quality piston rods capable of handling tough environments.
- Steel grades: AISI 1045 / 1050, 4140, CK45, C45, 42CrMo, 20MnV6, 27SiMn
- Typically meets ASTM A108, A311 class B
- Size Range:
- Metric size diameter 6 mm to 800mm, imperail sizes available.
- Induction hardened chrome rod length: Max. 18 meters.
- Hardness of chrome plating HRc 60-72
- Surface hardness of HRc 50 minimum
- Minimum hardness case depth at 1mm
- Hard chrome plated thickness per side: minimum 15 microns /20 microns/ 25 microns, 30microns, 50 μm
- Surface finish of roughness Max Ra 0.4μm, (16 Ra maximum)
- Offered in minimum yield strengths of 75k and 100k
- Custom made diameters and chrome thickness available upon request.
- Heat treatment:
Induction Hardened Rod (HRC 55-62)
Q&T(Quenching and tempering) Induction Hardened Rod (HRC 60-65)
Manufacturing Process of induction hardened chrome plated rods
Different from the normal hard chrome plated shafts, the induction hardened chrome plated rods are heat treated by induction hardening.
Induction hardened is a type of heat treatment process, for which a metal part is heated to a certain temperature by induction heating and then quenched.
Except the above, the other manufacturing processes are the same with ordinary chrome plated bars.
Materials of induction hardened chrome plated bar
Chemical compostion
Here below are the material specifcaitons of the induction hardened CK45 chrome plated bars and SAE 1045 chrome plated rods.
| Steel Grade | Chemical Composition % | ||||
| Carbon | Mn | Si | P | S | |
| SAE 1045 | 0.43-0.50 | 0.60-0.90 | – | 0.040 Max | 0.050 Max |
| CK 45 | 0.42-0.50 | 0.50-0.80 | 0.40 Max | 0.035 Max | 0.035 Max |
And below is the chemical composition of 4140 chrome plated bar for shafts for high strength or heavy duty applications.
| SAE 4140 | C% | Si% | Mn% | P% | S% | Cr% | Mo% |
| Min | 0.36 | 0.1 | 0.65 | 0.75 | 0.15 | ||
| Max | 0.44 | 0.4 | 1.1 | 0.04 | 0.04 | 1.2 | 0.35 |
Mechanical Properties
| Steel Grade | Mechanical Properties | |||
| Yield Strength | Tensile Strength | Elongation | Hardness | |
| SAE 1045 | 75000 psi / 517 Mpa | 85000 psi / 585Mpa | 10% | Rc 60-72 |
| CK 45 | 75000 psi / 517 Mpa | 85000 psi / 585Mpa | 10% | Rc 60-72 |
With special heat treatment, the yield strength of our induction hardened chrome plated bar can be min. 100K psi (690 Mpa).
For induction hardened chrome plated rods require high strength, we can supply with material 4140. Here below is the machanical properties of SAE 4140.
| 4140 | Yield strength | Tensile Strength | Elongation | Hardness HB |
| Min | 800 Mpa /115K psi | 900 Mpa /130K psi | 20% | 270 HB |
PACKING METHODS
The packing methods of induction hardened chrome plated shafts are the same with ordinary hard chrome plated rods, which are packed in cardboard sleeves and then put into wooden cases(upon request).
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