4140 hard chrome plated rod is a kind of high strength hard chrome plate bar made of material SAE 4140 steel bar. Our factory is a leading China 4140 chrome plated rod supplier, we manufacturer and supply a broad range of hard chrome plated 4140 steel bars, from metric size 6mm to 760 mm (imperial inch size 1/4″ to 30″).
What is 4140 steel?
Steel 4140 is AISI standard grade, it is a kind of alloy structural steel, equivalent to China standard GB 42CrMo.
4140 steel is a type of low alloy steel that is commonly used in various industries, including construction, manufacturing, and the oil and gas industries. It is made up of chromium, molybdenum, and manganese, and is known for its toughness, strength, and high resistance to impact and abrasion. It is also easy to forge, machine, and heat treat, making it a versatile material for many applications. 4140 steel is commonly used to make various products such as shafts, gears, bolts, and other machine components, as well as for making drill collars, tool joints, and heavy-duty machinery components.
The SAE 4140 alloy steel boasts high fatigue strength and low sensitivity to notches, with excellent low-temperature impact toughness and no significant temper brittleness. It is primarily used in the quenched and tempered state to manufacture parts that are subjected to high stress and impact loads, including hydraulic cylinder rods, pneumatic cylinder rods, the transmission eccentric shafts of horizontal forging machines, and crankshafts of forging presses.
4140 Chrome Plated Rod: Product Descriptions
The 4140 Chrome Plated Rod is manufactured by using high-quality SAE 4140 steel bar, which is then polished and ground to a high precision with centerless grinding. This rod is then plated with a minimum thickness of 20 microns (0.0008 inches) or 25 microns (0.001 inches) of chrome, which provides excellent corrosion resistance and a gleaming, reflective appearance. The 4140 Chrome Plated Rod is highly sought after by hydraulic and pneumatic industries due to its high yield strength and tensile strength and is commonly used for applications that require these properties.
Product Name: SAE 4140 hard chrome plated rod
Manufacturer Name: Guangxi Hydraulics
Origin: Wuxi, China
Material: SAE4140 /AISI4140 / 4140
Size Range: Dia. 6 mm – Dia. 760 mm (1/4 inch to 30 inch)
Tolerance: ISO f7, h8, g6 on request.
Length: random length & cut length, max. length upto 12m
Surface Roughness: Max Ra 0.2 μm
Chrome Plated thickness: min. 20 microns, 25 microns, 30 microns, 50 microns
Surface Hardness: Min. 900HV
Packing method:
Supplied in cardboard tubes for protection on outer surface, and then put in wooden cases. Packing method is the same with ordinary CK45 chrome plated bar and 1045 chrome plated bar.
Delivery Conditions available:
Hard Chrome Piston Rod ( HRC 15-20)
Quenched & Tempered (Q+T) Rod (HRC 28-32)
Induction Hardened Rod (HRC 55-62)
Q+T Induction Hardened Rod (HRC 60-65)
Material specification of 4140 chrome plated bar
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 |
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 |
| Diameter and Straightness Tolerance of 4140 chrome rod | ||||||||
| Diameter | mm | Up to 51mm Dia | Over 51 – 102mm Dia | Over 102mm Dia | Straightness | |||
| Inches | Up to 2.0 | Over 2.0 – 4.0 | Over 4.0 | Below 50mm 0.25mm/1000mm Over 50mm 0.30mm/1000mm |
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| Tolerance | mm | +0.00 | -0.025 | +0.00 | -0.050 | +0.00 | -0.075 | |
| Inches | +0.00 | -0.001 | +0.00 | -0.002 | +0.00 | -0.003 | ||
| Hard Chrome Plating | ||||||||
| Typical Surface Hardness | HV 1000 – 1150 | |||||||
| Typical Surface Roughness | 0.10 – 0.30 umRa (Microns) | |||||||
| Typical Surface Deposit* | 0.025 – 0.050mm (0.001″) – (0.002″) |
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Typical applications of 4140 chrome plated bar including:
- Agricultural Equipment,
- Hydraulic Cylinders,
- Hoists, Jacks & other Lifting equipment,
- Machine Tools,
- Mining and Earth Moving Equipment,
- Pumps,
- Waste Disposal Transport and Equipment etc.
Why choose our 4140 hard chrome bar?
We had gained very good reputation from our customers in China and abroad countries such as USA, Canada, Mexico, Colombia, Saudi Arabia, UAE, South Africa, Russia, Belarus, Thailand, Indonesia, Vietnam, Australia, Ukraine, Brazil, Turkey, Korea, New Zealand, Singapore, Kuwait and so on.
Customers choose our products for the benefits &advantages listed as below.
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- Nearly 30 Years of Production Experience for Chrome Plated Rods
- Advanced Manufacturing Equipment and Facilities:
- Cold Drawing Machine
- Straightening Machine
- Polishing Machine
- Heat Treatment Furnace
- Grinding Machine
- Regular Scheduled Maintenance by Professional Engineers
- High-Quality Raw Material:
- Mainly from Famous China Steel Makers such as TPCO, BAO STEEL, and SHA STEEL
- High Precision:
- Dimension Precision with ISO f7, f8, or g6 Tolerance (Upon Request)
- Ensures Precision of Hydraulic Cylinders or Machines
- Reliable Packing:
- Oiled with Anti-Rust Oil
- Protected with Cardboard Tubes and Seaworthy Packaging (Wooden Cases or Rope Wraps)
- Strict Quality Control:
- QC Team of Over 10 Persons
- Inspections Including:
- Chemical Analysis Test
- Tensile Test
- Dimension Inspection
- Roughness Testing
- Chrome Plated Thickness Test
- Other Tests Based on Standards and Customer Requirements
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- Mature Quality Management System:
- Total Quality Management System Ensures Good Control over Product Quality Processes
- Mature Quality Management System:
In addition to 4140 chrome plated bar, we also produce 4140 material of hydraulic cylinder tubes, and chrome plated hollow rods of 4140 steel.
SAE 4140 steel is equivale to steel 42CrMo. So this product is known as 42CrMo Chrome plated bar also.
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