Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars 42CrMO SCM440
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 90 m.t.
- Supply Capability:
- 2000000 m.t./month
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Description of steel round bar:
1. Commodity: Round steel bar
3. Technical: Hot rolling
2. Length: Min. 5.8meter, according to requirement.
3. Diameter: 16mm-250mm
5. Packing: In Bundle or according to your requirements.
Festures of steel round bar:
1.Dia 80-800mm Length:2000-13000mm or as required
2.Technique:Forged
3.Delivery Time:45 days
Specifications of steel round bar:
1. Commodity: Round steel bar
3. Technical: Hot rolling
2. Length: Min. 5.8meter, according to requirement.
3. Diameter: 16mm-250mm
Images of steel round bar:
FAQ:
1. What is your main market?
We mainly export to Asia such as Japan,Korea,Thailand and North America and Middle East.
2. How long is the lead time?
Delivery time: 45 days after order confirmed.
3. What payment term do you accept?
Payment: T/T or L/C at sight.
- Q: How do you calculate the shear strength of a steel round bar?
- The shear strength of a steel round bar can be calculated by using the formula: Shear Strength = 0.6 * Ultimate Tensile Strength Where the Ultimate Tensile Strength is the maximum stress a material can withstand before failure.
- Q: How do you prevent rust on steel round bars?
- To prevent rust on steel round bars, you can apply a protective coating such as paint, oil, or a rust inhibitor. Regular cleaning and maintenance, including keeping the bars dry and free from moisture, can also help prevent rust formation.
- Q: How do you identify the grade of a steel round bar?
- There are several ways to determine the grade of a steel round bar. First, examining the markings or labels on the bar itself can provide valuable information. Manufacturers often imprint or etch the grade directly onto the bar's surface. These markings usually include details like the grade designation (e.g., 304, 316, 4140), which represents the specific alloy composition, and may also include additional information such as the heat or lot number. Another method involves consulting the mill test certificate (MTC) that comes with the steel round bar. The MTC provides extensive information about the composition, mechanical properties, and other relevant specifications of the material. Typically, the steel mill or supplier issues the MTC, and it can be requested at the time of purchase. Additionally, the grade of a steel round bar can be determined through visual inspection and physical testing. Visual inspection entails examining the bar's appearance, texture, and color. Different grades of steel exhibit distinct characteristics, such as a glossy or matte finish, specific surface treatments, or variations in color due to varying alloying elements. Physical testing methods, such as tensile or hardness testing, can further confirm the steel grade. These tests measure the material's mechanical properties, including its strength, ductility, and hardness. By comparing the test results with established standards and specifications for different steel grades, it is possible to identify the grade of the round bar. In conclusion, to ascertain the grade of a steel round bar, one can inspect the markings, refer to the mill test certificate, visually assess the bar, and conduct physical tests to evaluate its mechanical properties.
- Q: What is the maximum length of a steel round bar?
- The maximum length of a steel round bar can vary depending on several factors such as the manufacturing capabilities, transportation limitations, and specific requirements of the project. However, in general, steel round bars can often be manufactured and transported in lengths of up to 12 meters (40 feet) or longer.
- Q: How do steel round bars perform under static or stationary loads?
- Steel round bars perform exceptionally well under static or stationary loads. Due to their high tensile and compressive strength, they can withstand heavy loads without significant deformation or failure. The structural integrity and stability of steel round bars make them a reliable choice for various applications where static or stationary loads are involved.
- Q: How are steel round bars used in the manufacturing of machinery and equipment?
- Steel round bars are commonly used in the manufacturing of machinery and equipment because of their high strength and durability. These bars are often machined, forged, or rolled to form various components such as shafts, gears, axles, and fasteners. Their uniform shape and consistent mechanical properties make them ideal for providing structural support, transferring power, and withstanding heavy loads in machinery and equipment. Additionally, steel round bars can be easily cut, welded, or heat treated to meet specific design requirements, making them versatile and essential in the manufacturing industry.
- Q: What is the difference between hot working and cold working of steel round bars?
- Steel round bars can be shaped and manipulated using two different methods: hot working and cold working. Hot working involves shaping steel at high temperatures, typically above the steel's recrystallization temperature. This makes the material more malleable and easier to shape. The processes involved in hot working include forging, rolling, and extrusion. Hot working has several advantages. It allows for the creation of complex shapes and sizes with minimal force or energy. It also improves the mechanical properties of the steel, such as strength and toughness, by refining its grain structure. However, hot working can cause oxidation and scale formation on the steel's surface, which may require additional treatments or cleaning. On the other hand, cold working refers to shaping steel at room temperature or below its recrystallization temperature. Cold working processes include bending, drawing, and cold rolling. Unlike hot working, cold working does not require heating the steel, which reduces energy consumption and production costs. It also results in a smoother surface finish and tighter tolerances compared to hot working. Cold working can increase the hardness and strength of the steel, making it suitable for applications that require higher mechanical properties. However, it can also make the steel more brittle and prone to cracking. In conclusion, the main difference between hot working and cold working steel round bars lies in the temperature at which the shaping process takes place. Hot working is done at high temperatures, making shaping easier and improving mechanical properties. Cold working, on the other hand, is done at room temperature or below, resulting in tighter tolerances and increased hardness. The choice between hot working and cold working depends on the desired properties and characteristics of the final product.
- Q: How do I determine the strength and hardness of a steel round bar?
- To determine the strength and hardness of a steel round bar, there are a few techniques and tests that can be used: 1. Tensile Test: This is the most common method for determining the strength of a steel bar. It involves applying a tensile force to the bar until it breaks, and measuring the maximum force or load it can withstand. This test provides information about the bar's ultimate tensile strength, yield strength, and elongation. 2. Hardness Test: There are several methods to measure the hardness of a steel bar, including the Rockwell, Brinell, and Vickers hardness tests. These tests involve indenting the surface of the bar with a standardized indenter and measuring the resulting indentation size. The hardness value obtained provides an indication of the bar's resistance to deformation and wear. 3. Charpy Impact Test: This test measures the toughness of a steel bar by striking it with a swinging pendulum and measuring the energy absorbed during fracture. It helps determine the ability of the bar to resist brittle fracture under impact loading conditions. 4. Microstructural Analysis: A microscopic examination of the steel bar's microstructure can provide insights into its mechanical properties. By preparing a polished and etched sample and examining it under a microscope, the presence of different phases, grain size, and any structural abnormalities can be observed. Different microstructural features can influence the strength and hardness of the bar. 5. Chemical Composition Analysis: The chemical composition of the steel bar, particularly the carbon content, plays a significant role in determining 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 is important to note that these tests and techniques should be conducted by qualified professionals in a controlled laboratory environment to ensure accurate and reliable results. Additionally, specific standards and specifications may exist for different applications, so consulting relevant standards and guidelines can provide further guidance on determining the strength and hardness of a steel round bar.
- Q: Can steel round bars be used in the construction industry?
- Yes, steel round bars are commonly used in the construction industry for various applications. They are often used as reinforcement in concrete structures, such as beams, columns, and slabs, to enhance their strength and durability. Steel round bars can also be used in the fabrication of structural components, such as trusses, frames, and supports, due to their high tensile strength and resistance to bending or breaking. Additionally, they can be employed in the construction of bridges, tunnels, buildings, and other infrastructure projects.
- Q: How do steel round bars compare to carbon fiber round bars?
- Steel round bars and carbon fiber round bars are materials commonly used in various industries, but they differ in several aspects. Strength and Durability: Steel round bars are renowned for their exceptional strength and durability, enabling them to withstand heavy loads, high temperatures, and harsh environments. On the other hand, carbon fiber round bars are also strong but generally not as strong as steel bars. However, they have a remarkable strength-to-weight ratio, making them a popular choice when weight reduction is crucial. Weight: One noticeable difference is the weight. Steel round bars are significantly heavier compared to carbon fiber round bars. This weight disparity often makes carbon fiber bars more preferable in industries where reducing weight is important, like aerospace and automotive sectors. The use of lighter bars can contribute to improved fuel efficiency, increased speed, and enhanced maneuverability. Corrosion Resistance: Steel round bars are susceptible to corrosion, especially when exposed to moisture and specific chemicals. Regular maintenance and protective coatings are often necessary to prevent rusting. Conversely, carbon fiber round bars possess inherent corrosion resistance. This property makes them valuable in environments where corrosion is a concern, such as marine applications. Flexibility and Stiffness: Steel round bars are generally stiffer and less flexible compared to carbon fiber round bars. This characteristic is advantageous in applications where rigidity and structural integrity are crucial, like construction and heavy machinery. In contrast, carbon fiber round bars offer higher flexibility and can be engineered to have varying levels of stiffness, making them suitable for applications requiring vibration damping or enhanced shock absorption. Cost: In terms of cost-effectiveness, steel round bars usually have the upper hand. Steel is widely available, and its production costs are relatively low. Carbon fiber, however, is more expensive to produce due to the complex manufacturing process and the cost of raw materials. Consequently, carbon fiber round bars tend to be pricier and are limited to industries where their unique properties justify the increased costs. In conclusion, steel round bars and carbon fiber round bars have their own advantages and disadvantages. Steel bars offer exceptional strength, durability, and cost-effectiveness, while carbon fiber bars excel in weight reduction, corrosion resistance, flexibility, and stiffness. The choice between the two depends on the specific requirements of the application, including factors such as load-bearing capacity, weight reduction, corrosion resistance, and cost considerations.
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Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars 42CrMO SCM440
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 90 m.t.
- Supply Capability:
- 2000000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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