Chrome plated bar, also known as hard chrome plated shaft, chrome steel bar, chrome plated shafting, and chrome rods for hydraulic cylinders, are manufactured from cold rolled or hot rolled carbon steel round bars. This is achieved through the use of high precision centerless grinding and polishing methods, followed by chrome plating to a minimum thickness of 20 microns (0.0008 inches). This chrome plating layer offers excellent corrosion resistance and a highly reflective appearance, making it ideal for producing top-quality hydraulic cylinder rods.
Chrome plated bar: Product Introduction
Chrome Plated Bar: Product Description
Product Standards
Our chrome plated bar is made to meet customers’ specifications, and conforms to the following standards.
- ASTM A311,
- ASTM A108
- other popular standards.
Available Steel grades for chrome bar:
Our hard chrome plated shafts are available with steel grade of SAE 1045, CK 45, C45; and stainless steel available on request.
- Chrome rod Size range:
Metric size: External diameter 6 mm to 900 mm;
Imperial size chrome bar available from 1/4″ to 32″
Length of chrome plated bar:
Our factory is capable of providing chrome rods for hydraulic cylinders with a length that can range from random to a specific, fixed length as per the customer’s request. The maximum length available for our chrome rods is 12 meters.
- Diameter Tolerance of chrome plated bars:
ISO f7, f8, g6 or on customers’ request.
Surface roughness:
The surface roughness of our factory’s hard chrome plated shafts is around Ra0.2μm(8 Ra), max. Ra0.4μm (16 Ra).
Hard Chrome Plated Thickness:
The chrome plating on our cylinder rod typically has a minimum thickness of 20 microns (0.0008 inches). Other plating thicknesses are available upon request, with a maximum thickness of 50 microns. Our chrome steel bars have been tested to withstand a salt spray test for at least 48 hours, in accordance with ASTM B-117 standards.
Packing of chrome plated shafts
Our chrome plated rods are packaged in cardboard tubes to ensure protection of the outer diameter during moving, loading, transportation, shipping and unloading.
Custom made diameters and chrome thickness of the chrome steel bar is available upon request.
Our factory’s chrome rod for hydraulic cylinders is available with or without Hardened Induction heat treatment.
Hard chrome plated shafts: Material Chemical composition
As a prominent China chrome plated bar manufacturer and supplier, we satisfy customers’ demands by offering chrome plated rods in medium carbon steel grades. The most commonly used steel grades include AISI 1045, JIS S45C, SAE1045, DIN CK45, SAE 4140, and 42CrMo. Omong these, SAE 1045, CK45 are the most popular steel grades of the chrome bars.
Here below is the chemical composition of steel grade SAE 1045 / CK45:
| 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 |
Here’s the chemical composition of 4140 chrome plated bar 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 |
Chrome plated shafting: 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 |
Our chrome plated rod can achieve a minimum yield strength of 100K psi (690 Mpa) through specialized heat treatment.
For applications that demand high strength, we offer SAE 4140 hard chrome plated bar. The following are 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 |
In addition, our chrome plated bar can be supplied with other types of materials, here below is a list of the materials.
Chrome plated piston rod Dimensions
As a top-notch China chrome plated piston rod manufacturer and chrome rod supplier, we produce chrome plated rods with an outer diameter of up to 900 mm. The following are some of the common sizes:
| Diameter(imperial size) | Weight per Foot | Diameter(metric size) | Weight per Meter | ||||||||
| (Inches) | (Lbs.) | mm | (KG.) | ||||||||
| 0.375 | 0.375 | 10 | 0.62 | ||||||||
| 0.438 | 0.512 | 12 | 0.89 | ||||||||
| 0.5 | 0.668 | 14 | 1.21 | ||||||||
| 0.625 | 1.043 | 15 | 1.39 | ||||||||
| 0.688 | 1.264 | 16 | 1.58 | ||||||||
| 0.75 | 1.502 | 17 | 1.78 | ||||||||
| 0.875 | 2.044 | 18 | 2 | ||||||||
| 0.938 | 2.349 | 20 | 2.47 | ||||||||
| 1 | 2.67 | 22 | 2.98 | ||||||||
| 1.063 | 3.017 | 25 | 3.85 | ||||||||
| 1.125 | 3.379 | 28 | 4.83 | ||||||||
| 1.188 | 3.768 | 30 | 5.55 | ||||||||
| 1.25 | 4.172 | 32 | 6.31 | ||||||||
| 1.313 | 4.603 | 35 | 7.55 | ||||||||
| 1.375 | 5.048 | 36 | 7.99 | ||||||||
| 1.5 | 6.008 | 40 | 9.86 | ||||||||
| 1.563 | 6.523 | 45 | 12.48 | ||||||||
| 1.625 | 7.05 | 50 | 15.41 | ||||||||
| 1.688 | 7.608 | 55 | 18.65 | ||||||||
| 1.75 | 8.177 | 56 | 19.33 | ||||||||
| 1.875 | 9.387 | 60 | 22.19 | ||||||||
| 1.938 | 10.028 | 63 | 24.47 | ||||||||
| 2 | 10.68 | 65 | 26.05 | ||||||||
| 2.125 | 12.057 | 70 | 30.21 | ||||||||
| 2.25 | 13.517 | 75 | 34.68 | ||||||||
| 2.375 | 15.06 | 80 | 39.46 | ||||||||
| 2.5 | 16.688 | 85 | 44.54 | ||||||||
| 2.625 | 18.398 | 90 | 49.94 | ||||||||
| 2.75 | 20.192 | 95 | 55.64 | ||||||||
| 2.875 | 22.069 | 100 | 61.65 | ||||||||
| 3 | 24.03 | 105 | 67.97 | ||||||||
| 3.25 | 28.202 | 110 | 74.6 | ||||||||
| 3.375 | 30.413 | 115 | 81.53 | ||||||||
| 3.5 | 32.708 | 120 | 88.78 | ||||||||
| 3.625 | 35.085 | 125 | 96.33 | ||||||||
| 3.75 | 37.547 | 130 | 104.19 | ||||||||
| 4 | 42.72 | 140 | 120.83 | ||||||||
| 4.25 | 48.227 | 150 | 138.71 | ||||||||
| 4.5 | 54.068 | 160 | 157.82 | ||||||||
| 4.75 | 60.242 | 170 | 178.17 | ||||||||
| 5 | 66.75 | 180 | 199.75 | ||||||||
| 5.25 | 73.592 | 200 | 246.6 | ||||||||
| 5.5 | 80.768 | 250 | 385.31 | ||||||||
| 6 | 96.12 | ||||||||||
| 6.5 | 112.808 | ||||||||||
| 7 | 130.83 | ||||||||||
| 7.5 | 150.188 | ||||||||||
| 8 | 170.88 | ||||||||||
| 8.5 | 192.908 | ||||||||||
| 9 | 216.27 | ||||||||||
| 10 | 267 | ||||||||||
| 11 | 323.07 | ||||||||||
| 12 | 384.48 | ||||||||||
| Note: Other sizes are available on customer’s request, Our Chrome rod max size is diameter 900 mm. | |||||||||||
Chrome steel bar: Dimension tolerance
Our chrome rods 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 | ||
What are the advantages of our chrome plated bar?
Customers have a preference for our factory’s chrome rod for hydraulic cylinders due to its several advantageous features, including:
a. Precise tolerances, that guarantee a perfect fit when used to make hydraulic piston rods.
b. The use of top-quality carbon steel that provides a balance of strength, hardness, and wear resistance while maintaining formability, weldability, and durability.
c. Chrome plating that offers corrosion resistance and a highly reflective appearance (Extremely reflective look);
d. High Strength: The yield strength of chrome plated bars can be 75000 psi up to 100000 psi, depends on the material and heat treatment method.
e. Excellent hardness: with a minimum surface hardness of HV850 and above, which not only enhances wear resistance but also increases the lifespan of the chrome plated rods, resulting in cost savings for the customer.
Applications of Chromed Bar
As a commonly used component in hydraulic and pneumatic systems, chrome plated bar is widely referred to as body material of hydraulic cylinder rod. Its primary purpose is for use in the production and repair of hydraulic and pneumatic piston rods.
In addition to its use in hydraulic and pneumatic piston rods, chrome plated bar can also be utilized in applications that demand a high-quality surface finish and precise dimensional tolerance.
Chrome plated bars are widely used in various industries due to their unique properties, including:
- Hydraulics and Pneumatics: Chrome plated bars are used as shafts and pistons in hydraulic and pneumatic systems due to their high strength and resistance to corrosion and wear.
- Material Handling: Chrome plated bars are used in conveyor systems, cranes, and hoists as they offer high load-bearing capacity and low friction.
- Robotics: Chrome plated bars are used in robotic systems due to their durability and precision.
- Machinery: Chrome plated bars are used in various types of machinery, including presses, punches, and die-casting machines, due to their high strength and resistance to wear and tear.
- Automotive: Chrome plated bars are used in the production of automotive components, such as suspension systems, due to their high strength and durability.
- Industrial Equipment: Chrome plated bars are used in the production of industrial equipment, such as pumps and compressors, due to their high strength and resistance to corrosion.
These are just some of the common applications of chrome plated bars. The exact application will depend on the specific requirements of the user, such as size, strength, and corrosion resistance.
Chrome plated bar: Product Packing
Packing is the last and important step to ensure the quality of the chrome plated bar. Good packing can protect the chrome plated rods surface from damaging during moving, loading, transportation, unloading.
The packing method of chrome plated bars is similar to the packing method of hydraulic cylinder tubes, as both require protection from impact and abrasion during transportation and storage. However, the packing method of chrome plated bar is stricter and more important than that of the hydraulic cylinder tubes. Because even the slightest damage to the outer surface cannot be accepted.
The following are our standard packing methods for chrome plated bars:
- Every chrome bar will be oiled slightly to prevent from rusty;
- Each chrome bar need to be put into a separated cardboard tube, to protect the outer surface of the chrome steel bar;
- Then the chrome bar packed in cardboard tube will be put into wooden boxes or wrap with ropes.
Chrome Plated Bar Packing Photos
Why Choose us?
Here below are the main advantages of our products and services.
- Rich and mature manufacturing experience: Our factory has nearly 30 years of experience in producing chrome plated bars, which gives us a strong understanding of customer needs and allows us to provide high-quality products;
- Advanced manufacturing equipment and facilities: Our state-of-the-art manufacturing equipment and facilities allow us to produce chrome plated rods with high precision and consistency, which including: cold drawing machine, straightening machine, polishing machine, heat treatment furnace, grinding machine, etc. We also regularly maintain and upgrade our machinery to ensure their performance.
- High-quality raw materials: We source our raw materials from reputable steel manufacturers in China such as TPCO, SHA STEEL, BAO STEEL, ensuring that our honed tubes are made with premium-quality materials.
- High precision: Our chrome plated bar is manufactured with tight tolerance and high-dimension precision, which is important for hydraulic cylinder applications. Diameter tolerance can be ISO f7, f8 or g6, upon request.
- To ensure the longevity of the chrome plated shafts, they will be coated with rust-preventing oil before shipment. The outer surface of the chrome will be protected during transit through the use of cardboard tubes for each rod. Finally, the rods will be packed in sturdy, seaworthy packaging such as wooden crates or wrapped with ropes.
- Strictly quality control: Our factory has a QC team of more than 10 persons. All the chrome rods will be inspected before delivery. The inspections including: Chemical Analysis Test, Tensile Test, Dimension Inspection, Roughness Testing, Chrome plated thickness test and other tests according to standards and cusotmer’s requirements.
- Mature quality management system: Our Total Quality Management system ensures that all aspects of our business related to product quality are well-controlled and monitored.
Besides chrome plated rods, we also produce and supply induction hardened chrome plated cylinder rods.
Mob: +861775-285-6381
Questions & Answers about Chrome Plated Bar
Question 1: What is the lead time of Chrome plated rods?
Answer: As one of the leading China chrome plated bar suppliers, we stock a lot of different sizes and materials of mother steel rods, so normally our delivery time is 10 – 20 days depends on the quantity and size.
Question 2: How can you ensure the quality of the hard chrome plated rods?
Answer: Yes, we execute Total Quality Management System in our chrome plated bar factory. We only use raw materials (round steel bar) made in China top quality steel maker such as TPCO, Sha-Steel, Huaigang Special Steel and so on. And we will inspect every chrome plated bar before packing, the hard chrome plated rod will be supplied with mill test certificate according to EN 10204 /3.1.
Question 3: Is your company chrome plated bar manufacturer or supplier trading company?
Answer: We are true chrome plated bar factory company located in Wuxi, Jiangsu, we are one of the professional chrome plated bar and hydraulic cylinder tube manufacturers in China, we welcome customers to come to visit our factory. Then you can see the details.
Question 4: How can you protect the outer surface of the chromed steel bars from damage during transportation?
Answer: To protect the outer surface of the hard chrome plated bar, we will put each chromed rod into a paper tube (cardboard sleeve). And then we will pack the chromed bar into wooden cases.
Question 5: Did you export your chrome plated shafts to oversea countries? And what is your main oversea market?
Answer: Yes, as the one of the largest chrome plated shaft suppliers in China, we exported our chrome plated shaft to many customers in oversea countries, our main market including USA, Vietnam, Australia, Russia, UAE, Canada, South Africa, Thailand, Brazil, etc.
Question 6: Will chrome plated steel bar rust?
Answer: No, Steel rod with Chrome plating will not rust, however when the chrome plating is damaged – it can appear dull. The steel core can rust if plating is lost through accidental damage or with natural wear over time.
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