Chrome Plated Bar/Rod Introduction – by Chrome plated Shafts Manufacturer
Chrome plated bar is known as chrom plated rod also, they are the same product. This product is usually manufactured from cold rolled or hot rolled carbon steel round bar, 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.
SKYLINE is a leading China chrome plated bar manufacturer factory. We produces and supplies many types of chrome plated rods /chromed shafts with full range of steel grades and dimensions.
As the chrome plated bar/ rod is usually used as hydraulic cylinder shafts, pneumatic cylinder shafts and other machine shafts, so they are known as Hard Chrome Plated Shafts also.
CONTENT TABLE
Main description of Chrome plated bars
Product Materials
- SAE 1045: SAE 1045 hard chrome plated bar
- CK45: CK45 chrome plated rod
- C45: C45 chrome plated bar
- C45E: C45E hard chrome bar
- SAE 4140: 4140 chrome plated bars
- 27SiMn: 27SiMn chrome plated bar
Product Sizes
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
CK45 chrome plated bar
Product Name: CK45 chrome platd bar; CK45 chrome plated rod; CK45 chrome plated shaft.
Origin (factory located): China, Wuxi
Brand Name: SKYLINE
Size Range
- Diameter: 6mm to 850 mm
- Length: max 18 meters
- Imperial sizes and metric sizes both are available
[bg_collapse view=”button-blue” icon=”zoom” color=”#ffffff” expand_text=”Show More” collapse_text=”Show Less” ]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
Steel 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 |
- 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.
Here below is the main process showing how hard chrome plated shaft is manufactured.
Here below are the photos of our CK45 chrome plated rods, the photos are taken from our factory workshop.
1045 Chrome Plated Rod
Product Name: 1045 chrome plated bar; 1045 chrome plated rod; 1045 chrome plated shaft
Material: SAE1045
Type: Chrome Plated Bar/Chrome Plated Rod/Chrome plated shaft
Heat Treatment:
- Q+T(Quenched+Tempered)
- Induction Hardened
- No heat treated
Diameter: Φ 6-800mm
Length: max.20 meters
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.
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 | |
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 | ||
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.
Benefits of Induction Hardened Chrome Plated Rods:
- Increased resistance to damage from external impact
- Enhanced wear resistance
- Improved fatigue strength
- Greater surface hardness
- Reduced bending and torsion under load
Our factory has been manufacturing and supplying Induction Hardened Chrome Plated Rods, Bars, and Shafts for over 25 years. Our products are widely used in hydraulic and pneumatic cylinders.
The Induction hardened chrome plated rod 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 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)
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.
Here below are the material specifcaitons 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 |
Material: SAE4140, AISI 4140, 4140; 42CRMO4/42CrMo, SCM440
Heat treatments:
- Q+T(Quenched+Tempered)
- 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
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 |
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.
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.
Here below are some photos of our 4140 hard chrome plated shafts/rods.
Below is the product descriptions of chrome plated hollow bars:
Material: ST52, E355, CK45, 4140, 42CrMo, 27SiMn, SAE1045；
Heat treatment Type:
- BKS: for ST 52, E355
- +SR: for material St52, E355
- Q+T (Quenching and tempering ) for CK45, SAE 1045, 4140, 42CrMo
- Hard: +C /EN10305-1; BK(DIN2391)
OD Size : 20mm – 1600mm
Length: max. 21 meters
Chrome layer: min 20/25/30/50 Microns or customized
Type: 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
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.
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.
Here below are some photos of our chrome plated hollow bars.
WE ALSO PRODUCE & SUPPLY BELOW PRODUCTS:
- Hard Chrome Plated Bar
- Hard Chrome Plated Rods
- Chrome Plated Hollow bar
- Hard Chrome Plated Hollow Rods
- Induction Hardened Chrome Bar
- Hard Chrome Plated Piston Rod
- Hard Chrome Shaft
- Hard Chrome Plated Shaft
- Honed Tube
- Ready To Honed Tube (Cold Drawn Seamless Tube)
- Hydraulic Cylinder Barrel
- Hydraulic Cylinder Tubes
Our factory can supply highest quality hard chrome plated bars and chrome 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.