AISI 5140 Alloy Steel Round Bars System 1

AISI 5140 Alloy Steel Round Bars System 2

AISI 5140 Alloy Steel Round Bars System 3

AISI 5140 Alloy Steel Round Bars

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 120000 m.t./month

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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.37-0.44 %	Tensile strength(MPA)	≥980(100)
Si	0.17-0.37 %	Yield strength (MPA)	≥785(80)
Mn	0.50-0.80 %	Elongation (δ5/%)	≥9
Cr	0.80-1.10 %	Reduction in Area (ψ/%)	≥45
Ni	≤0.30 %	Impact (J)	≥ 47
P	≤0.035 %	Impact toughness value αkv (J/cm2)	≥59(6)
S	≤0.035 %	Hardness	≤207HB
Cu	≤0.030 %

Product Name	Typical Grades	Diameter(mm)	Standard adopted
Carbon Steel	20 (1020/S20C/C22)	Ø16-Ø300	GB/SAE/JIS/DIN
40 (1040/S40C/C40)
45 (1045/S45C/C45)
Bearing Steel	GCr9 (51100/SUJ1)	Ø12-Ø250
GCr15 (52100/SUJ2/100Gr6)
GCr9SiMn (A485-Gr.1/SUJ3)
Cr-Mo Steel	20Cr (5120/SCr420H/20Cr4)	Ø12-Ø250
40Cr (5140/SCr440/41Cr4)
42CrMo(4140/SCM440/42CrMo4)
Gear Steel	20CrNiMo	Ø16-Ø600
20CrMn(5115/SMnC420/20MnCr5)
20CrNiMo(8620/SNCM220/20CrMiMo2)

Carbon Steel	Mold bottom, Plastic mold, Construction machinery parts Automobile parts, Security grills, Screens, Construction
Bearing Steel	Aerospace, Navigation, Nuclear energy, Chemical industry Electronic information, Petrochemical, Instrument and meter Transportation
Cr-Mo Steel	Mechanism & Fasteners gear, Stressed components for vehicles Engines and machines, Parts of larger cross-section
Gear Steel	All kinds of gears, Statically and dynamically stressed component for vehicles Engines and machine, Larger cross-section parts, Crankshafts

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:What is the difference between a polished and a hot rolled steel round bar?: The main difference between a polished and a hot rolled steel round bar lies in their manufacturing processes and the resulting surface finish. Hot rolled steel round bars are produced by heating a steel billet or ingot to high temperatures and then rolling it into the desired shape, typically a round bar. This process results in a rough and uneven surface finish with mill scale and imperfections. The hot rolled bars are generally used for applications where surface finish is not critical, such as structural components, machinery parts, and construction materials. On the other hand, polished steel round bars undergo additional processing to achieve a smooth and shiny surface finish. After the hot rolling process, the bars are processed through various grinding and polishing techniques to remove the mill scale, surface imperfections, and achieve a uniform finish. This results in a refined and aesthetically pleasing surface that is suitable for applications where appearance and visual appeal matter, such as decorative items, furniture, and architectural components. In addition to the surface finish, the mechanical properties of the two types of steel round bars can also differ. The hot rolled bars generally have a rougher surface and may exhibit some residual stresses, while the polished bars have a smoother surface and reduced internal stresses. However, the overall mechanical properties, such as strength and hardness, are primarily determined by the grade and composition of the steel used, rather than the manufacturing process or surface finish. In summary, the difference between a polished and a hot rolled steel round bar lies in their surface finish. Hot rolled bars have a rough and uneven surface with mill scale and imperfections, while polished bars undergo additional processing to achieve a smooth and shiny finish. The choice between the two depends on the specific application and the desired appearance of the final product.

Q:Can steel round bars be used for drive shaft applications?: Yes, steel round bars can be used for drive shaft applications. Drive shafts are responsible for transmitting torque and rotational motion from the engine to the wheels or other components in various mechanical systems such as automobiles, industrial machinery, and even boats. Steel round bars possess excellent mechanical properties, including high strength, durability, and toughness, which are crucial for withstanding the stresses and loads imposed during operation. They also exhibit good fatigue resistance, allowing them to endure repeated loading cycles without failure. Furthermore, steel round bars can be accurately machined to meet the required dimensions and tolerances for drive shaft applications. They can be heat-treated to enhance their strength and hardness or surface treated to improve corrosion resistance if necessary. Overall, steel round bars are a popular choice for drive shaft applications due to their combination of strength, durability, and machinability, making them well-suited for transmitting power efficiently and reliably in various mechanical systems.

Q:What are the different types of steel round bar alloys for improved corrosion resistance?: There are several different types of steel round bar alloys that offer improved corrosion resistance. Some common examples include stainless steel alloys such as 304, 316, and 410, which contain chromium and nickel to create a protective layer against corrosion. Additionally, weathering steel alloys like ASTM A588 and A709 are known for their ability to develop a rust-like appearance that acts as a protective barrier. Other options include duplex stainless steels, which combine the benefits of austenitic and ferritic alloys, and high-alloy steels like Inconel and Hastelloy, which are highly resistant to corrosion in extreme environments.

Q:Can steel round bars be threaded or machined?: Yes, steel round bars can be threaded or machined.

Q:What is the maximum load capacity of a steel round bar?: The maximum load capacity of a steel round bar depends on various factors, including the diameter, length, and grade of the steel. Steel round bars are designed to withstand different levels of stress and can have varying load capacities. Generally, the load capacity is determined by the yield strength and ultimate tensile strength of the steel. To determine the maximum load capacity of a specific steel round bar, it is necessary to consult engineering specifications or reference materials provided by the manufacturer. These specifications will provide the necessary information to calculate the load capacity based on the specific dimensions and properties of the round bar. It is important to note that load capacity calculations should be carried out by qualified professionals with a thorough understanding of structural engineering principles and material properties.

Q:Can steel round bars be used in the manufacturing of tools and equipment?: Yes, steel round bars can be used in the manufacturing of tools and equipment. Steel is a popular material choice for tool and equipment manufacturing due to its excellent strength, durability, and versatility. Steel round bars can be easily shaped, cut, and formed into various tool components such as shafts, handles, and blades. Additionally, steel's high tensile strength and resistance to wear and tear make it suitable for heavy-duty applications. It can withstand the forces and stress involved in tool usage, ensuring a long lifespan and reliable performance. Furthermore, steel's ability to be heat-treated and hardened allows for the creation of tools with enhanced hardness and toughness, making them more effective in cutting, shaping, or gripping tasks. Overall, steel round bars are a popular and widely used material in the manufacturing of tools and equipment due to their strength, durability, and versatility.

Q:How do I determine the load capacity of a steel round bar?: To ascertain the load capacity of a steel round bar, one must take into account a range of factors. The load capacity of said round bar is contingent upon its diameter, length, and the specific steel variant employed. The ensuing steps elucidate the process of determining the load capacity: 1. Ascertain the steel grade: Distinct steel grades exhibit distinct strength properties. A few examples of common steel grades are A36, A572, and 4140. To pinpoint the precise grade of the steel round bar at hand, reference the specifications or seek guidance from an engineer. 2. Calculate the cross-sectional area: Employ the formula A = πr² to compute the cross-sectional area of the round bar, with A representing the area and r representing the radius of said bar. Remember to convert the diameter to radius by dividing it by 2. 3. Determine the allowable stress: The allowable stress denotes the maximum stress that a material can endure prior to deformation or failure. This value can be gleaned from engineering handbooks or through consultation with an engineer. 4. Apply the load capacity formula: Compute the load capacity of the round bar using the formula Load Capacity = Allowable Stress × Cross-sectional Area. 5. Account for safety factors: In engineering applications, it is customary to incorporate safety factors to ensure the safety of the structure. The specific safety factors hinge upon the application in question and the desired level of reliability. To ascertain the ultimate load capacity, reference the appropriate safety factor for your project. It is crucial to acknowledge that calculating the load capacity of a steel round bar is a multifaceted procedure necessitating expertise in structural engineering. If any uncertainty arises or precise calculations are required, it is advisable to seek the guidance of a qualified engineer who can furnish detailed analysis predicated on the specific parameters of your project.

Q:How are steel round bars used in the construction of pipelines?: Steel round bars are commonly used in the construction of pipelines due to their high strength and durability. These bars are typically made from carbon or alloy steel and are available in various sizes and grades to suit the specific requirements of the pipeline. One of the key uses of steel round bars in pipeline construction is for reinforcement. They are often used as reinforcement in concrete foundations and supports along the pipeline route. The bars provide added strength and stability to the structure, ensuring that the pipeline remains secure and can withstand external forces such as soil movement or seismic activity. Additionally, steel round bars are also used as the main material for the fabrication of pipeline joints. These bars are typically bent or welded to form various shapes and sizes to connect different sections of the pipeline. The high tensile strength of steel ensures that the joints can withstand the pressure and stress exerted by the fluids being transported through the pipeline. Moreover, steel round bars are utilized in the construction of pipeline hangers and supports. These bars are often shaped and welded to form brackets or clamps that hold the pipeline in place. The bars provide a sturdy and reliable support system, preventing sagging or movement of the pipeline, and ensuring smooth and uninterrupted flow. In summary, steel round bars play a crucial role in the construction of pipelines. They are used for reinforcement, fabrication of pipeline joints, and the construction of hangers and supports. Their high strength, durability, and versatility make them an ideal choice for ensuring the structural integrity and reliability of pipelines.

Q:How do I determine the strength and hardness of a steel round bar?: In order to assess the strength and hardness of a steel round bar, various methods and tests can be employed: 1. Tensile Test: The strength of a steel bar is commonly determined through this method. It involves subjecting the bar to a tensile force until it fractures, and measuring the maximum force or load it can endure. This test provides information on the bar's ultimate tensile strength, yield strength, and elongation. 2. Hardness Test: Several techniques, such as the Rockwell, Brinell, and Vickers hardness tests, can be utilized to measure the hardness of a steel bar. These tests entail indenting the bar's surface using a standardized indenter and gauging the resulting indentation size. The obtained hardness value indicates the bar's resistance to deformation and wear. 3. Charpy Impact Test: This test gauges the toughness of a steel bar by striking it with a swinging pendulum and measuring the energy absorbed during fracture. It helps assess the bar's ability to withstand brittle fracture under conditions of impact loading. 4. Microstructural Analysis: Examining the microstructure of the steel bar through microscopic observation can offer insights into its mechanical properties. By preparing a polished and etched sample and inspecting it under a microscope, the presence of different phases, grain size, and any structural irregularities can be observed. Various microstructural features can impact the bar's strength and hardness. 5. Chemical Composition Analysis: The chemical composition of the steel bar, particularly the carbon content, significantly influences its strength and hardness. Analyzing the composition using techniques like spectroscopy or chemical analysis can provide valuable information about the bar's mechanical properties. It should be emphasized that these tests and techniques must be carried out by qualified professionals in a controlled laboratory setting to ensure accurate and reliable results. Moreover, specific standards and specifications may exist for different applications, so referring to relevant standards and guidelines can offer further guidance on determining the strength and hardness of a steel round bar.

Q:Can steel round bars be used in the production of construction materials?: Indeed, the utilization of steel round bars is feasible in the manufacturing of construction materials. Owing to their remarkable robustness and endurance, steel round bars find frequent application within the construction sector. These bars are instrumental in fortifying concrete structures, exemplified by the reinforcement of beams, columns, and slabs, thereby enhancing their resilience and steadfastness. Furthermore, in the construction of buildings and bridges, steel round bars can be employed in the creation of steel frames, trusses, and various structural constituents. The widespread popularity of these bars stems from their adaptability and capacity to endure substantial burdens in the construction industry.

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