Carbon Alloy Steel Round Bars AISI 4140 System 1

Carbon Alloy Steel Round Bars AISI 4140 System 2

Carbon Alloy Steel Round Bars AISI 4140 System 3

Carbon Alloy Steel Round Bars AISI 4140 System 4

Carbon Alloy Steel Round Bars AISI 4140

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.38-0.43 %	Tensile strength(MPA)	≥1080(110)
Si	0.15-0.35%	Yield strength (MPA)	≥930(95)
Mn	0.75-1.00 %	Elongation (δ5/%)	≥12
Cr	0.80-1.10 %	Reduction in Area (ψ/%)	≥45
Ni	≤0.030 %	Impact (J)	≥ 63
P	≤0.030 %	Impact toughness value αkv (J/cm2)	≥78(8)
S	≤0.040 %	Hardness	≤217HB
Cu	≤0.030 %
Mo	0.15-0.25 %

Company Information

CNBM International Corporation is the most important trading platform of CNBM group.

Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.

FAQ

1, Your advantages?

professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale

2, Test & Certificate?

SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem

3, Factory or Trading Company?

CNBM is a trading company but we have so many protocol factories and CNBM works as a trading department of these factories. Also CNBM is the holding company of many factories.

4, Payment Terms?

30% TT as deposit and 70% before delivery.

Irrevocable L/C at sight.

5, Trading Terms?

EXW, FOB, CIF, FFR, CNF

6, After-sale Service?

CNBM provides the services and support you need for every step of our cooperation. We're the business partner you can trust.

For any problem, please kindly contact us at any your convenient time.

We'll reply you in our first priority within 24 hours.

Packaging & Delivery

1, Packaging: seaworthy package or as required

2, Delivery: 35-45 days or based on quantity

Q: Can steel round bars be used in the manufacturing of gears?: Certainly, gears can utilize steel round bars in their manufacturing process. The utilization of steel round bars is quite common in gear manufacturing given their remarkable attributes such as formidable strength, long-lasting durability, and remarkable resistance to wear and tear. The rounded shape of these bars allows for effortless machining and molding into the desired gear design. Furthermore, steel round bars possess exceptional mechanical properties, including impressive tensile strength and commendable resistance to fatigue, which are crucial for gears that encounter heavy loads and repetitive movements. Additionally, steel round bars can undergo heat treatment to further enhance their hardness and toughness, rendering them ideal for demanding gear applications. All in all, steel round bars are a highly favored option in gear manufacturing due to their adaptability and dependability.

Q: Can steel round bars be used for shafts or axles?: Indeed, shafts or axles can make use of steel round bars. In a multitude of industries, including automotive, machinery, and construction, steel round bars are frequently employed due to their robustness, longevity, and adaptability. Their selection for shafts or axles often stems from their capacity to endure substantial loads, furnish dependable support, and endure wear and tear. By virtue of being machinable and amenable to heat treatment, steel round bars can be customized to meet specific prerequisites, rendering them well-suited for deployment as shafts or axles in a wide range of applications where strength and dependability are paramount, such as vehicles, industrial apparatus, and rotating machinery.

Q: What is the average cost of steel round bars?: The average cost of steel round bars can vary depending on various factors such as the size, grade, and market conditions. Generally, the price of steel round bars ranges from $0.50 to $5 per pound. However, it is important to note that these prices are approximate and can fluctuate based on the specific requirements and location of the purchase. Additionally, additional costs such as transportation, processing, and any applicable taxes should also be considered when determining the overall cost. It is recommended to consult with local suppliers or conduct market research to obtain the most accurate and up-to-date information on the average cost of steel round bars in your specific region.

Q: How are steel round bars used in the manufacturing of hydraulic cylinders?: Steel round bars are a crucial component in the manufacturing of hydraulic cylinders due to their strength, durability, and versatility. These round bars are typically made from carbon steel, alloy steel, or stainless steel, which are all known for their high tensile strength and resistance to corrosion. The first step in using steel round bars for hydraulic cylinders is the selection of the appropriate diameter and length. The diameter of the round bar determines the overall strength of the hydraulic cylinder, and the length determines its size and capacity. Once the desired dimensions are determined, the steel round bars are cut to the required length using specialized cutting tools. Next, the steel round bars undergo a series of processes to shape them into the necessary components of a hydraulic cylinder. This includes machining, drilling, and turning operations to create features such as threaded ends, grooves, and mounting surfaces. These processes are carried out with precision to ensure the round bars meet the exact specifications of the hydraulic cylinder design. After the shaping processes, the steel round bars are heat-treated to enhance their mechanical properties. Heat treatment involves heating the round bars to a specific temperature and then rapidly cooling them to achieve the desired hardness, toughness, and dimensional stability. This step is crucial in ensuring the hydraulic cylinders can withstand the high pressures and forces they will encounter during operation. Once the steel round bars have been shaped and heat-treated, they are further processed to achieve the desired surface finish. This can involve processes such as grinding, polishing, or coating to improve the round bars' appearance and resistance to corrosion. The surface finish is important for ensuring smooth operation and preventing any potential leaks or damage to the hydraulic cylinder. Finally, the steel round bars are assembled with other components such as piston rods, cylinder heads, and seals to complete the hydraulic cylinder. These assemblies are carried out using advanced welding or fastening techniques to ensure the components are securely attached and can withstand the forces and pressures exerted during hydraulic operation. In summary, steel round bars play a vital role in the manufacturing of hydraulic cylinders by providing the necessary strength, durability, and versatility required for these critical components. From the initial selection of the appropriate diameter and length to the shaping, heat treatment, and assembly processes, the use of steel round bars ensures the hydraulic cylinders can effectively transmit hydraulic power while withstanding the demanding conditions they are designed for.

Q: Can steel round bars be used for making hydraulic cylinders or pistons?: Absolutely! Hydraulic cylinders or pistons can definitely be made using steel round bars. Steel, being a robust and long-lasting material, has the ability to endure the immense pressures and heavy loads that hydraulic cylinders and pistons usually encounter. It is possible to machine or shape the steel round bars into the desired dimensions for the hydraulic cylinder or piston. Furthermore, steel possesses excellent corrosion resistance properties, which is crucial for hydraulic systems that may come into contact with moisture or other corrosive substances. All in all, steel round bars are an ideal choice of material for the production of hydraulic cylinders and pistons.

Q: Can steel round bars be used in the production of agricultural equipment?: Yes, steel round bars can be used in the production of agricultural equipment. Steel round bars are known for their strength, durability, and versatility, making them suitable for various applications, including agricultural equipment manufacturing. They can be used for constructing frames, supports, axles, and other components that require high strength and resistance to wear and tear.

Q: Can steel round bars be used in the agriculture industry?: Yes, steel round bars can be used in the agriculture industry. They are commonly used for applications such as building fences, constructing equipment, and supporting structures for agricultural buildings. Steel round bars offer durability, strength, and versatility, making them suitable for various agricultural applications.

Q: How do you measure the straightness tolerance of a steel round bar?: To determine the straightness tolerance of a steel round bar, various methods can be employed based on the desired level of accuracy and precision. Below are several commonly used techniques: 1. Visual Inspection: This straightforward approach involves visually examining the bar for any noticeable deviations from straightness. Placing the bar on a flat surface allows for the detection of bends or curves along its length. However, it is worth noting that this method is subjective and may not yield precise measurements. 2. Straightedge Method: Using a straightedge such as a ruler or precision straightedge, one can assess the presence of gaps or spaces between the straightedge and the bar's surface. This method offers a higher level of accuracy but can still be influenced by human error. 3. Dial Indicator Method: By utilizing a dial indicator, a precise measuring tool, the straightness tolerance can be measured. Fixing the dial indicator to a stationary point and moving it along the length of the bar enables the identification of any deviations from a straight line. This method provides more precise measurements and can quantify the straightness tolerance in specific units like inches or millimeters. 4. Laser Measurement: Laser systems, such as laser alignment devices, serve as an effective means of measuring the straightness tolerance of a steel round bar. These systems project a straight line onto the bar's surface using lasers and then analyze any deviations from this line. Laser measurement offers highly accurate and repeatable results, making it suitable for applications requiring strict tolerances. It is essential to consider the required level of accuracy, the size of the round bar, and the available resources and equipment when selecting a measurement method. It is also advisable to consult industry standards and guidelines to ensure compliance with specific tolerances and requirements relevant to your application.

Q: Are steel round bars suitable for the production of hydraulic cylinders?: Yes, steel round bars are suitable for the production of hydraulic cylinders. Steel round bars provide excellent strength, durability, and resistance to wear and tear, making them a reliable choice for hydraulic cylinder production. Additionally, their versatility allows for customization and various configurations to meet specific hydraulic system requirements.

Q: The difference between galvanized round bar and galvanized flat steel: Round steel (grade 1 steel) belongs to ordinary low carbon steel with low strength. However, the plasticity of the round bar is stronger, that is, the round steel has a larger deformation before it is pulled off.It has been widely used in the fields of hardware, construction, automobile, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, space, etc.. The most extensive machining of general machine parts, general rod type steel parts, CD pole, bolt, nut.Refers to the galvanized flat steel width 12-300mm, thickness 4-60mm, cross section is rectangular and with pure edge of galvanized steel. Galvanized flat steel can be finished steel, also can be galvanized pipe blank and galvanized belt. With high strength, light structure: strong grid welding structure, so that it has high load, light structure, easy lifting and other features, beautiful appearance, durable.

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