YOUNGLEE’s Shaft factory is a professional China chrome plated bar manufacturer factory. We produce and supply a wide range of chrome plated rods /chromed plated shafts with full range of steel grades and dimensions.
What is chrome plated rod /chrome plated bar?
Chrome plated rod is known as chrome plated bar or chrome plated shaft also, they are the same product. They are called chrome bar, chrome rod or chrome shaft for short some times.
Hard chrome plated bar is a chromium-plated round steel product used primarily as piston rod material in all standard applications in hydraulics and pneumatics. Popular applications are found in dump trucks, lifters, garbage compactors, cranes, agricultural machinery and production equipment with movable parts. Chrome plated bars & rods are mostly used as piston rods (cylinder rods), which is a critical component in hydraulic cylinders and pneumatic cylinders. The basic function of transforming hydraulic power to a linear motion whilst preventing ingress of abrasive media into the hydraulic system will stipulate a set of demands on the rod.
As the chrome plated rod/ bar is usually used as hydraulic cylinder shafts, pneumatic cylinder shafts and other machine shafts, so they are known as Hard Chrome Plated Shafts also.
How is chrome plated bar manufactured?
This product is mostly produced from round carbon steel rods, by using high precision centerless grinding and polishing methods, and then chrome plated to a certain plating thickness such as min. 20 microns (0.0008″), min. 25 microns (0.001″), min. 50μm (0.002″) and so on.
Our hard chrome plated shafts / bar /rods are available with sizes as below.
Metric Size: Diameter min. 10 mm, and max. 800 mm；
Imperial Size: diameter 3/8″ to 30″
Length: fixed length 100mm to 13000 mm, random length available.
Tolerance: f7, f8, g6, and so on.
Chrome plated bar Heat treatment
Chrome plated shafts can be supplied with heat treatment condition as below.
Induction hardened, high frequency hardening, etc.
Q&T: Quenching and Tempering heat treatment
Chrome plated rod Surface Condition
The surface roughness of the chrome plated bars comes in two series which are Max Ra 0.2 μm and max Ra 0.4μm.
Chrome plated Thickness
The chrome layer thickness of our chrome plated bar is Available in Min. 20 microns, 25 microns, 30 microns, … 50 microns.
Main types of Chrome plated rods / bars / shafts
As one of the leading chrome plated bar manufacturers, our factory produces all types of chrome plated bars / rods / shafts with full range of materials and a wide size ranges from ⌀10mm – ⌀ 800 mm.
CK45 chrome plated bar
CK45 hard chrome plated bar is also called CK45 chrome bar or CK45 chrome rod for short sometimes, it is the hard chrome plated bar made of steel grade CK45.
Imperial sizes and metric sizes both are available
Heat Treatment type:
Q&T (Quenched+Tempered)
Induction hardned (high frequency induction ect)
Q&T + Induction hardened
No heat treated
Precision tolerances and surface finish.
Hardness: Rc 60-72
Thcikness of chrome plated layer:
Min. 20 microns
Min 25 microns (0.001″)
Min 30 microns
Min 50 microns (0.002″)
Customized MaterialSteel grade CK45 is equivalent to SAE standard grade of SAE 1045, so this product is also known as 1045 chrome plated rod or 1045 Chrome Bar. Here below is the chemical composition and mechanical properties of CK45.
Steel Grade
Chemical Composition %
Carbon
Mn
Si
P
S
CK45 (C45)
0.42-0.50
0.50-0.80
0.40 Max
0.035 Max
0.035 Max
Steel Grade
Mechanical Properties
Yield Strength
Tensile Strength
Elongation
Hardness
CK 45
75K psi / 517 Mpa
85K psi / 585Mpa
10%
Rc 60-72
Surface Condition
Hard Chrome Plated Thickness: Our CK45 chrome rod normally is with chrome plated thickness of Min. 20Microns (0.0008″) or Min. 25 Microns (0.001″) ; And other hard chrome plated thickness available upon customer’s requirements, the max. chrome thickness is 50microns. Our factory’s chrome rods can pass the salt spray tested to at least 48 hours in accordance with ASTM B-117.
Surface roughness: The surface roughness of our factory’s CK45 hard chrome plated bar is around Ra0.2μm(8 Ra), max. Ra0.4μm (16 Ra).
Hardness: Hardness of hard chrome plated layer is Min. HV900.Process
Here below is the main process showing how hard chrome plated shaft is manufactured.
Photos
Here below are the photos of our CK45 chrome plated rods, the photos are taken from our factory workshop.
1045 Chrome Plated Rod
1045 hard chrome plated bar is also called SAE 1045 chrome bar or 1045 chrome rod for short sometimes, it is the hard chrome plated shafting made of steel grade SAE 1045.
Chrome plated layer thickness: min 20μm, 25μm, 30μm, 50 Microns or customized upon request.
Straightness: <= 0.5/1000
Surface finish: Max Ra 0.4μm (16 RA)
Diameter tolerance: ISO f7/f8/f9/h8/h9 or as request
Protection: Diameter Anti-rust oiled, protected with hard cardboard sleeve.
Packing: Wooden case
WHAT IS THE ADVANTAGES OF OUR 1045 CHROME PLATED ROD?
Carbon steel balances durability, hardness, and wear resistance using formability, weldability, and durability;
Chrome plating provides corrosion resistance along with an Extremely reflective look
High precision tolerances, which ensures when used to make hydraulic piston rod, it can fit the cylinder precisely.
Good Hardness: the surface hardness attaining HV850 minimal and upward, which not only help improve wear resistance but also help extend the life span of these chrome plated rods, thereby helping the consumer save the cost.
Material
Below is the chemical compostion & mechanical properties of Steel 1045 chrome 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
Steel Grade
Mechanical Properties
Yield Strength
Tensile Strength
Elongation
Hardness
SAE 1045
75000 psi / 517 Mpa
85000 psi / 585Mpa
10%
Rc 60-72
Tolerance
Our 1045 chrome bars can be supplied with tolerance of g6, f7, f8 and f9 on customers request. Here below is the tolerance chart.
Tolerances for Chrome Shafts (ISO 286-2)
over
up to
Upper and Lower limits in micrometer (0.001 mm)
d9
e8
f7
g6
h5
h6
h7
h8
h9
h11
–
3
-20
-14
-6
-2
0
0
0
0
0
0
-45
-28
-16
-8
-4
-6
-10
-14
-25
-60
3
6
-30
-20
-10
-4
0
0
0
0
0
0
-60
-38
-22
-12
-5
-8
-12
-18
-30
-75
6
10
-40
-25
-13
-5
0
0
0
0
0
0
-76
-47
-28
-14
-6
-9
-15
-22
-36
-90
10
18
-50
-32
-16
-6
0
0
0
0
0
0
-93
-59
-34
-17
-8
-11
-18
-27
-43
-110
18
30
-65
-40
-20
-7
0
0
0
0
0
0
-117
-73
-41
-20
-9
-13
-21
-33
-52
-130
30
50
-80
-50
-25
-9
0
0
0
0
0
0
-142
-89
-50
-25
-11
-16
-25
-39
-62
-160
50
65
-100
-60
-30
-10
0
0
0
0
0
0
-174
-106
-60
-29
-13
-19
-30
-46
-74
-190
65
80
-100
-60
-30
-10
0
0
0
0
0
0
-174
-106
-60
-29
-13
-19
-30
-46
-74
-190
80
100
-120
-72
-36
-12
0
0
0
0
0
0
-207
-126
-71
-34
-15
-22
-35
-54
-87
-220
100
120
-120
-72
-36
-12
0
0
0
0
0
0
-207
-126
-71
-34
-15
-22
-35
-54
-87
-220
120
140
-145
-85
-43
-14
0
0
0
0
0
0
-245
-148
-83
-39
-18
-25
-40
-63
-100
-250
140
160
-145
-85
-43
-14
0
0
0
0
0
0
-245
-148
-83
-39
-18
-25
-40
-63
-100
-250
160
180
-145
-85
-43
-14
0
0
0
0
0
0
-245
-148
-83
-39
-18
-25
-40
-63
-100
-250
180
200
-170
-100
-50
-15
0
0
0
0
0
0
-285
-172
-96
-44
-20
-29
-46
-72
-115
-290
200
225
-170
-100
-50
-15
0
0
0
0
0
0
-285
-172
-96
-44
-20
-29
-46
-72
-115
-290
225
250
-170
-100
-50
-15
0
0
0
0
0
0
-285
-172
-96
-44
-20
-29
-46
-72
-115
-290
250
280
-190
-110
-56
-17
0
0
0
0
0
0
-320
-191
-108
-49
-23
-32
-52
-81
-130
-320
280
315
-190
-110
-56
-17
0
0
0
0
0
0
-320
-191
-108
-49
-23
-32
-52
-81
-130
-320
315
355
-210
-125
-62
-18
0
0
0
0
0
0
-350
-214
-119
-54
-25
-36
-57
-89
-140
-360
355
400
-210
-125
-62
-18
0
0
0
0
0
0
-350
-214
-119
-54
-25
-36
-57
-89
-140
-360
Chromed Bar Packing
Our factory’s chrome plated bars are oiled with anti-rust oil on the outer diameter surface, then each chromed rod is protected with a cardboard sleeve (paper tube), and then packed in wooden cases. Please refer to below photos.
Induction hardened chrome plated rod
Induction hardening of piston rods in hydraulic cylinders is performed in order to increase the resistance to damage from external impact in applications where there is risk for them.
As the first level chrome plated rod manufacturer, 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.
Product Description
The Induction hardened chrome plated rod results in a superior impact resistant bar ideal for high quality piston rods capable of handling tough environments.
Size Range: Metric size diameter 6 mm to 800mm, imperail sizes available.
Induction hardened chrome bar 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)
Process
Different from the normal chrome plated rods, 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.
Materials
Here below are the material specifcations of the induction hardened 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 rod for shafts.
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 rod can be min. 100K psi (690 Mpa).
For induction hardened chrome plated shafts 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
Applications
4140 Hard Chrome plated bar
As a leading China 4140 Hard Chrome Plated Bar manufacturer and supplier, Younglee has been manufacturing and supplying 4140 Hard Chrome Bars with details as below for more than 25 years.
Induction Hardened (high frequency hardening, etc)
Diameter: Φ 6-800mm
Length: max 21 meters
Chrome plated layer thickness: min. 20 microns, 25 microns, min.30 mcirons, min.50 Microns or customized thickness.
Straightness: <= 0.5/1000
Surface Roughness: Max. 0.4μm
Hardness of the chrome layer: 900 HV (min) – 1150 HV
Diameter tolerance: ISO f7/f8/f9/h8/h9 or as request
Packing: Anti-rust oiled outside, protect with hard cardboard tube, and then put into wooden case.
Delivery Condition:
Hard Chrome Plated Rod
Quenched & Tempered (Q+T) hard chrome plated rod
Induction Hardened chrome plated bar
Q+T Induction Hardened chromed bar
Material
Below is the chemical composition of 4140 chrome plated bars.
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
Here below is the mechanical properties of SAE 4140.
4140
Yield strength
Tensile Strength
Elongation
Hardness HB
Min
800 Mpa /115K psi
900 Mpa /130K psi
20%
270 HB
Application
HERE BELOW IS THE APPLICATION LIST OF THE CHROME RODS:
Hydraulic cylinders (chrome plated piston rods)
Pneumatic cylinders / air cylinders (hydraulic cylinder piston rods)
Guide rods for plastic manufacturing machine and hydraulic machinery
Rollers for machines, such as packing machine rollers, printing machine rollers
Shaft for machinery, such as Textile machinery center axle, Transport machinery center axle, etc.
Ejector rods for injection molding machines
Vibration absorbers and pistons for some industrial machinery.
Why Choose Us?
1. Extensive production experience: more than 25 years manufacturing experience for 4140 honed tube and SAE 4140 chrome plated rod, in Australia, Thailand, Brazil, India, Iran, Indonesia, South Africa and other countries have long-term buyers.
2. Advanced production equipment: cold drawing machine, honing machine, skiving & roller burnishing machine, straightening machine, polishing machine, heat treatment furnace, grinding machine, etc. We have professional technicians do regular scheduled maintenance on these machines to guarantee them work well.
3. High quality raw material: our raw material of SAE 4140 steel mainly from some famous steel mills, such as TPCO, BAO STEEL, SHA STEEL, which are best and largest 4140 steel manufacturer in China.
4. High precision: Honed Tube, inside surface roughness 02-0.4 um, straightness max 0.5/1000, strict tolerance DIN2391 H8. Skived & Roller Burnished Tube, inside surface roughness under 0.2 um, straightness max 0.2/1000, strict tolerance DIN2391 H8. Chrome Plated Rod, chrome layer 10 micron to 100 micron, strict tolerance ISO f7.
5. Strict quality control: we have professional in-house QC to inspect all products. We will do Chemical Composition Test, Mechanical Property Test, Dimension Inspect, Roughness Test, Chrome Layer Test and other tests in need before delivery.
6. Safe packing: an-rust oil on tubes and rods before delivery. Plastic caps on both ends to protect tube inside surface. Then be packed with seaworthy package or in wooden case.
Photos
Here below are some photos of our 4140 hard chrome plated shafts/rods.
Chrome Plated Hollow Bar
Chrome plate hollow bar is known as chrome plated OD tube or hollow chrome bar also, they are made of cold drawn seamless tubes or hollowed bars, by grinding and precision polishing on the outside diameter and then chrome plated to a certain thickness on the outer diameter.
Product Descritpion
Below is the product descriptions of chrome plated hollow bars:
Q+T (Quenching and tempering ) for CK45, SAE 1045, 4140, 42CrMo
Hard: +C /EN10305-1; BK(DIN2391)OD Size : 20mm – 1600mmLength: max. 21 metersChrome layer: min 20/25/30/50 Microns or customizedType: Seamless, Hot Rolled, Cold Rolled, Cold Drawn
Straightness: ≤ 0.5/1000
Roughness: OD Ra 0.2μm, max. 0.4μm
Tolerance EXT: DIN2391, EN10305, ASTM A519
Diameter tolerance: ISO f7/f8/f9/h8/h9 or as request
Protection: Anti-rust oil on inside and outside surface.
Packing: Hard cardboard tube protection and then wrapped with rope or in wooden case.
CHEMICAL COMPOSITION & MECHANICAL PROPERTIES OF CHROME PLATED HOLLOW BAR
Advantages
Why Choose Us?
Customer trust us and choose us because of our below adavantages.
WHAT IS THE ADVANTAGES OF OUR CHROME PLATED HOLLOW BAR?
Product advantages:
Carbon steel balances durability, hardness, and wear resistance using formability, weldability, and durability;
Chrome plating provides corrosion resistance along with an Extremely reflective look
High precision tolerances, which ensures when used to make hydraulic piston rod, it can fit the cylinder precisely.
Good Hardness: the surface hardness attaining HV850 minimal and upward, which not only help improve wear resistance but also help extend the life span of these chrome plated rods, thereby helping the consumer save the cost.
Company Advantages:
1.Extensive production experience: more than 20 years manufacturing experience for honed tube and chrome plated rod, in Australia, Thailand, Brazil, India, Iran, Indonesia, South Africa and other countries have long-term buyers.
2.Advanced production equipment: cold drawing machine, honing machine, skiving & roller burnishing machine, straightening machine, polishing machine, heat treatment furnace, grinding machine, etc. We have professional technicians do regular scheduled maintenance on these machines to guarantee them work well.
3.High quality raw material: our raw material mainly from some famous steel mills, such as TPCO, BAO STEEL, SHA STEEL, which are best and largest raw material manufacturer in China.
4.High precision: Honed Tube, inside surface roughness 02-0.4 um, straightness max 0.5/1000, strict tolerance DIN2391 H8. Skived & Roller Burnished Tube, inside surface roughness under 0.2 um, straightness max 0.2/1000, strict tolerance DIN2391 H8. Chrome Plated Rod, chrome layer 10 micron to 100 micron, strict tolerance ISO f7.
5.Strict quality control: we have professional in-house QC to inspect all products. We will do Chemical Composition Test, Mechanical Property Test, Dimension Inspect, Roughness Test, Chrome Layer Test and other tests in need before delivery.
6.Safe packing: an-rust oil on tubes and rods before delivery. Plastic caps on both ends to protect tube inside surface. Then be packed with seaworthy package or in wooden case.
Producing Process
Hard Chrome plated hollow bar are usually manufactured from cold drawn seamless tubes with grinding and polishing on the outer diameter, and then chrome plated to a certain thickness. Sometimes, the mother material of the chromed hollow rod is hot rolled seamless tubes. Here below is the main process of how is the hard chrome plated hollow rods are manufactured.
Product Photos
Here below are some photos of our chrome plated hollow bars.
Main APPLICATIONS OF Chrome plated bar / chromed rods/ shafts
Hard chrome plated bars are ideal for parts and components that are subjected to withstand abrasion and friction and to be exposed to elements.
Our factory can supply highest quality hard chrome plated bars and chromed rods to customers all over the world. If you are interested in our hard chrome piston rod, chrome rod, chrome plated bars, Please contact us by email to [email protected]
Need to purchase chrome plate bar? Contact us by email or phone. Email: [email protected]; TEL: +8618612706695
