Carbon Steel Rod SAE 1045 Round Steel Bar

Carbon Steel Rod SAE 1045 Round Steel Bar System 1

Carbon Steel Rod SAE 1045 Round Steel Bar System 2

Carbon Steel Rod SAE 1045 Round Steel Bar System 3

Carbon Steel Rod SAE 1045 Round Steel Bar System 4

Carbon Steel Rod SAE 1045 Round Steel Bar

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 50 m.t.

Supply Capability:: 10000 m.t./month

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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.43-0.50 %	Tensile strength(MPA)	≥600(61)
Si	0.17-0.37 %	Yield strength (MPA)	≥355(36)
Mn	0.60-0.90 %	Elongation (δ5/%)	≥16
Cr	≤0.25 %	Reduction in Area (ψ/%)	≥40
Ni	≤0.30 %	Impact (J)	≥ 39
P	≤0.040 %	Impact toughness value αkv (J/cm2)	≥49(5)
S	≤0.050 %	Hardness	≤229HB
Cu	≤0.25 %

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)

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:How are steel round bars tested for quality?: To ensure that steel round bars meet the necessary standards and specifications, various methods are employed to test their quality. One commonly used test is visual inspection, which involves carefully examining the bars for any visible defects such as surface cracks, pits, or deformities. This task is carried out by highly skilled personnel who have been trained to identify irregularities that could potentially impact the quality of the steel bars. Another crucial test is dimensional inspection, which assesses the diameter, length, and straightness of the round bars. This ensures that the bars fall within the specified tolerances and meet the required dimensions for their intended use. Mechanical testing is also conducted to evaluate the strength and mechanical properties of the steel bars. This includes tests like tensile strength, yield strength, and elongation, which determine how the bars will perform under different loads and conditions. Specialized equipment is used to carry out these tests, providing important information about the structural integrity and quality of the steel bars. Moreover, chemical composition analysis is performed to verify that the steel bars have the correct proportions of various elements, such as carbon, manganese, and alloying elements. This analysis is crucial as it determines the suitability of the bars for specific applications and ensures that they possess the desired characteristics. Additionally, non-destructive testing methods, such as ultrasonic testing, magnetic particle inspection, or dye penetrant testing, may also be employed. These techniques can detect internal or surface defects that may not be visible to the naked eye, providing further confidence in the quality and integrity of the steel bars. In summary, a combination of visual inspection, dimensional inspection, mechanical testing, chemical composition analysis, and non-destructive testing methods is used to thoroughly assess the quality of steel round bars. These rigorous testing processes are essential in ensuring that the bars meet the required standards and specifications, guaranteeing customers high-quality and reliable steel products.

Q:What are the different types of heat treatments applied to steel round bars?: There are several types of heat treatments that can be applied to steel round bars to enhance their mechanical properties and improve their performance in various applications. Some of the common heat treatments include: 1. Annealing: This heat treatment involves heating the steel round bars to a specific temperature and then allowing them to cool slowly. Annealing helps to relieve internal stresses, improve ductility, and increase toughness. 2. Normalizing: In this heat treatment, the steel round bars are heated to a temperature above the critical transformation point and then allowed to cool in still air. Normalizing improves the structure and mechanical properties of the steel, making it more uniform and reducing residual stresses. 3. Quenching: Quenching is a rapid cooling process that involves immersing the steel round bars in a quenching medium such as oil or water. This heat treatment produces a hardened microstructure by transforming the austenite phase into martensite, increasing the hardness and strength of the steel. 4. Tempering: After quenching, tempering is often performed to reduce the brittleness of the hardened steel. The steel round bars are reheated to a specific temperature and then slowly cooled. Tempering helps to improve toughness and ductility while maintaining a suitable level of hardness. 5. Stress Relieving: This heat treatment is used to reduce residual stresses in the steel round bars that may have been introduced during previous manufacturing processes. The bars are heated to a temperature below the transformation point and then slowly cooled. Stress relieving improves dimensional stability and reduces the risk of distortion or cracking. 6. Case Hardening: Case hardening is a surface heat treatment that involves introducing carbon or nitrogen into the outer layer of the steel round bars. This process creates a hard, wear-resistant surface while maintaining a tough and ductile core. These are just a few examples of the different types of heat treatments that can be applied to steel round bars. The choice of heat treatment depends on the desired mechanical properties and the specific application requirements.

Q:What is the difference between a hot-finished and a cold-finished steel round bar?: The main difference between a hot-finished and a cold-finished steel round bar lies in the manufacturing process. A hot-finished steel round bar is produced by heating the steel billet or ingot to high temperatures and then rolling it into the desired shape. This process results in a rougher surface, with the bar exhibiting a scale or oxidation layer. On the other hand, a cold-finished steel round bar is produced by further processing the hot-finished bar through additional steps like cold drawing, turning, grinding, or polishing. This process enhances the dimensional accuracy, surface finish, and mechanical properties of the bar. The cold-finished bar has a smoother surface and tighter tolerances, making it suitable for applications that require precision and a higher-quality finish. In summary, while both hot-finished and cold-finished steel round bars serve the same purpose, the cold-finished bar offers improved dimensional accuracy, surface finish, and mechanical properties due to additional processing steps.

Q:What is the difference between a rough turned and a seamless steel round bar?: A rough turned steel round bar refers to a metal bar that has undergone a preliminary turning process, where excess material is removed to achieve a rougher surface finish. This process helps to create a more uniform diameter and removes any surface imperfections or irregularities. Rough turned bars are commonly used in applications where a smooth surface finish is not a requirement, such as in manufacturing machinery or agricultural equipment. On the other hand, a seamless steel round bar is a solid metal bar that is formed without any welding or seams. It is manufactured through a process called piercing, where a solid billet is heated and then pierced with a mandrel to create a hollow tube. The tube is then elongated and reduced in diameter through a series of rolling and drawing processes until it reaches the desired dimensions. Seamless round bars are known for their superior strength and resistance to corrosion, making them suitable for applications where a high level of performance is required, such as in the oil and gas industry or automotive manufacturing. In summary, the main difference between a rough turned and a seamless steel round bar lies in their manufacturing processes and surface finishes. Rough turned bars are created by removing excess material to achieve a rougher surface finish, while seamless bars are formed without any welding or seams, resulting in a smooth and continuous surface.

Q:How is the copper wire and galvanized round steel connected during the construction of the lightning protection device?: Copper wire and galvanized steel bars can be directly welded together, do not pay attention to;Lightning protection device refers to the lightning receiver, the lead wire, grounding device, surge protector (SPD) and other connected conductor sum.

Q:What are the advantages of using wear-resistant steel round bars?: There are several advantages of using wear-resistant steel round bars: 1. Enhanced durability: Wear-resistant steel round bars are specifically designed to withstand high levels of abrasion and wear. They have a high hardness level and are resistant to surface damage caused by friction, impact, or scraping. This results in a longer lifespan of the round bars, reducing the need for frequent replacements. 2. Increased strength: Wear-resistant steel round bars possess exceptional strength properties, allowing them to withstand heavy loads and extreme conditions. This makes them suitable for a wide range of applications, such as in industries like mining, construction, manufacturing, and transportation, where strength and resilience are crucial. 3. Improved safety: The use of wear-resistant steel round bars ensures a safer working environment. Their high resistance to wear minimizes the risk of accidents and injuries caused by equipment failures or structural damage. This is particularly important in industries where heavy machinery, tools, or structures are involved. 4. Cost-effectiveness: Although wear-resistant steel round bars may have a higher initial cost compared to regular steel bars, their extended lifespan and reduced maintenance requirements make them a cost-effective choice in the long run. The reduced need for replacements and repairs leads to lower downtime, increased productivity, and ultimately, decreased operational costs. 5. Versatility: Wear-resistant steel round bars can be used in a variety of applications due to their versatility. They can be easily machined, welded, or formed into different shapes and sizes to meet specific requirements. This flexibility allows for their use in various industries and applications, making them an ideal choice for many projects. In summary, the advantages of using wear-resistant steel round bars include enhanced durability, increased strength, improved safety, cost-effectiveness, and versatility. These properties make them a reliable and efficient option for applications where wear and tear are significant concerns.

Q:What is the typical tolerance for diameter and length in steel round bars?: The tolerance for diameter and length in steel round bars can vary depending on the industry standards and requirements specific to each sector. Generally, the tolerance for diameter in steel round bars is typically between +/- 0.005 and 0.010 inches. This means that the bar's actual diameter can deviate up to 0.010 inches from the specified diameter, either larger or smaller. Likewise, the tolerance for length in steel round bars is usually around +/- 0.125 to 0.250 inches. Consequently, the actual length of the bar can differ up to 0.250 inches from the specified length, either longer or shorter. It is essential to highlight that these tolerances can differ based on the intended application and the manufacturing industry's specific standards. Therefore, it is vital to refer to the relevant industry standards or the manufacturer's specifications to determine the precise tolerances required for a specific steel round bar.

Q:How do steel round bars perform under fatigue loading?: Steel round bars generally perform well under fatigue loading, especially if they are made from high-quality steel. Fatigue loading refers to the repeated application of stress or strain on a material, which can lead to failure over time. Steel round bars are known for their excellent fatigue strength, which is the ability to withstand cyclic loading without developing cracks or failures. This is mainly due to the inherent properties of steel, such as its high strength, ductility, and toughness. Under fatigue loading, steel round bars undergo cyclic stress, which causes the material to experience alternating tension and compression. However, steel has a relatively high endurance limit, also known as fatigue strength coefficient, which determines the maximum stress level that the material can withstand without failure, even under cyclic loading. Steel round bars also have good resistance to fatigue crack propagation. This means that if a crack does initiate due to cyclic loading, it is less likely to propagate or grow quickly compared to other materials. This is due to the material's ability to absorb energy and redistribute stress, preventing the crack from growing and ultimately leading to failure. However, it is important to note that the performance of steel round bars under fatigue loading can be influenced by various factors. These include the specific type and grade of steel used, the manufacturing process, surface conditions, and the applied stress or strain levels. It is crucial to design and use steel round bars in accordance with industry standards and guidelines to ensure their optimal performance and safety under fatigue loading.

Q:What are the advantages of using precipitation-strengthened steel round bars?: Using precipitation-strengthened steel round bars in various applications offers several benefits. Firstly, these bars possess improved mechanical properties, making them stronger and more durable compared to regular steel bars. Through the heat treatment process of precipitation hardening, fine particles form within the steel structure. These particles act as obstacles to dislocation movement, resulting in enhanced strength and hardness. Secondly, the increased strength of precipitation-strengthened steel round bars allows for material usage reduction while maintaining the desired level of structural integrity. This leads to cost savings in terms of raw materials and transportation, making it an economical choice in the construction and manufacturing industries. Additionally, precipitation-strengthened steel round bars exhibit excellent corrosion resistance properties. The formation of fine particles during precipitation hardening creates a dense and uniform microstructure, effectively blocking the movement of corrosive agents. This corrosion resistance makes these bars ideal for applications in harsh environments or industries where exposure to corrosive substances is common. Another advantage of using precipitation-strengthened steel round bars is their ability to withstand high temperatures. The fine particles within the steel structure contribute to improved thermal stability, enabling these bars to maintain their strength and hardness even under elevated temperatures. This makes them suitable for applications involving high-temperature operations, such as in the aerospace and automotive industries. Furthermore, precipitation-strengthened steel round bars possess superior fatigue resistance, making them advantageous in applications that require repetitive or cyclic loading. The precipitation hardening process enhances the material's resistance to fatigue failure, allowing it to withstand prolonged stress without significant deformation or failure. This makes these bars suitable for use in structures subjected to dynamic or fluctuating loads, such as bridges, cranes, and machinery components. In conclusion, precipitation-strengthened steel round bars offer enhanced mechanical properties, reduced material usage, excellent corrosion resistance, high-temperature stability, and superior fatigue resistance. These advantages make them the preferred choice for a wide range of applications, spanning from construction and manufacturing to the aerospace and automotive industries.

Q:What is the tolerance level for steel round bars?: The tolerance level of steel round bars can vary based on multiple factors, including the bar's grade, diameter, and industry standards. Typically, the tolerance level is specified in terms of diameter or diameter deviation. For instance, in manufacturing, the tolerance level can be defined as a specific range of diameters, such as +/- 0.001 inches or +/- 0.02 millimeters. This means that the actual diameter should fall within this range to meet the tolerance requirements. Alternatively, the tolerance level can be expressed as diameter deviation, which measures the difference between the actual diameter and the specified nominal diameter. This deviation is often presented as a percentage or a specific measurement, like +/- 0.5% or +/- 0.010 inches. It is important to acknowledge that certain industries, like aerospace or automotive, may have stricter tolerance requirements due to the need for precision and quality. In these cases, the tolerance specifications might be narrower to ensure compliance with performance and safety standards. Ultimately, it is crucial to refer to relevant industry standards, specifications, or customer requirements to determine the specific tolerance level for steel round bars in a particular application.

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