Carbon Structural Steel Square Bars ST37-2CR
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 120000 m.t./month
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Carbon Structural Steel Square Bars ST37-2CR
Product Specification
1, Chemical Composition %
| Grade | C | Si | Mn | S | P | Cr |
| ST37-2CR | 0.21-0.25 | ≤0.35 | ≤1.4 | ≤0.045 | ≤0.045 | ≥0.30 |
2, Mechanical Properties
| Strength of Extension σb | Yield Strength σs | Impact AKv |
| 340-470 Mpa | ≥235 Mpa | ≥27J |
3, Diameter: 9mm, 9.8mm, 10mm, 12mm, 12.5mm, 13mm, 15mm, 15.87mm, 16mm, 19mm, 20mm, 22mm,
25mm, 25.4mm, 28mm, 38mm, 50mm, 51.5mm, 53mm, 65mm, 75mm, 100mm
Application
1, Widely used in construction and engineering structure.
2, Widely used in making reinforcing steel bar or building plant room rack, high voltage transmission tower, bridge, vehicle, boiler, vessel, ship, etc.
3, Widely used in manufacturing mechanical parts which are not required to be with high performance.
Product Main Points
1, Heat Treatment: normalizing, annealing, tempering, quenching
2, Surface Treatment: black, grinding, bright, polish
3, Product Process: hot rolled, cold drawn, forged
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- Q: Can steel round bars be plated with other metals?
- Yes, steel round bars can be plated with other metals. Plating is a process in which a thin layer of one metal is applied to the surface of another metal. This is commonly done to enhance the appearance of the steel round bar or to provide it with additional properties such as corrosion resistance or improved conductivity. The plating process involves immersing the steel round bar in a solution that contains ions of the desired metal. Through the use of electrical currents or chemical reactions, the metal ions are deposited onto the surface of the steel, forming a thin and uniform coating. Popular metals used for plating steel round bars include nickel, chrome, zinc, and copper. Plating is a versatile and cost-effective method to improve the performance and aesthetics of steel round bars for various applications.
- Q: What are the standard sizes for steel round bars?
- Steel round bars come in various standard sizes, which differ depending on the industry and application at hand. Examples of frequently used standard sizes are 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch, 1 inch, 1 1/4 inch, 1 1/2 inch, 1 3/4 inch, 2 inch, 2 1/2 inch, 3 inch, 3 1/2 inch, 4 inch, 4 1/2 inch, 5 inch, 5 1/2 inch, 6 inch, 7 inch, 8 inch, 9 inch, 10 inch, 11 inch, 12 inch, and so forth. These sizes are commonly employed in the construction, manufacturing, and engineering sectors, with slight variations depending on the country or region. It is important to acknowledge that steel round bars can also be customized to specific sizes and lengths in order to meet the particular requirements of a given project.
- Q: What is the difference between a cold finished and a hot rolled steel round bar?
- A cold finished steel round bar and a hot rolled steel round bar differ in their manufacturing processes and resulting properties. Cold finished steel round bars are manufactured through a cold drawing process, where the steel is pulled through a die at room temperature. This process results in a smooth, polished surface with tight dimensional tolerances. The cold drawing process also enhances the strength, hardness, and overall mechanical properties of the steel. Cold finished steel round bars are often preferred for applications where precision and a smooth surface are crucial, such as in machinery, automotive parts, and tools. On the other hand, hot rolled steel round bars are manufactured by heating the steel to a high temperature and then rolling it through a series of rollers. This process allows for the shaping and forming of the steel while it is in a pliable state. Hot rolled steel round bars have a rough, scaled surface and looser dimensional tolerances compared to cold finished bars. They also tend to have a slightly lower strength and hardness than their cold finished counterparts. Due to their more affordable cost and ease of production, hot rolled steel round bars are commonly used in construction, structural components, and general fabrication. In summary, the main differences between cold finished and hot rolled steel round bars lie in their manufacturing processes and resulting properties. Cold finished bars offer enhanced strength, precision, and a smooth surface, making them suitable for applications requiring high precision and mechanical performance. Hot rolled bars, on the other hand, have a rougher surface and looser tolerances, but their affordability and ease of production make them a popular choice for general applications.
- Q: What is the minimum yield strength of steel round bars?
- The minimum yield strength of steel round bars can vary depending on the specific grade and type of steel being used. However, in general, most steel round bars have a minimum yield strength of 36,000 psi (pounds per square inch) or 250 megapascals (MPa). This minimum yield strength is typically required to ensure that the steel round bars have sufficient strength and durability to withstand applied loads and prevent deformation or failure. It is important to note that different applications may require steel round bars with higher yield strengths to meet specific performance requirements.
- Q: Can steel round bars be used for making fasteners or bolts?
- Yes, steel round bars can be used for making fasteners or bolts. Steel round bars are often used as raw materials for manufacturing fasteners and bolts due to their high strength, durability, and resistance to deformation. They can be shaped, threaded, and heat-treated to meet the specific requirements of fasteners and bolts.
- Q: What are the different types of steel round bar alloys for improved hardness and strength?
- Some examples of steel round bar alloys that are known for improved hardness and strength include 4140, 4340, and 8620. These alloys are commonly used in industries such as automotive, aerospace, and construction due to their exceptional mechanical properties.
- Q: What is the difference between a cold finished and a turned steel round bar?
- Cold finished steel round bars and turned steel round bars are utilized in various industries for different purposes. The manufacturing process and resulting properties distinguish these two types of steel bars. For a cold finished steel round bar, the production involves cold drawing or cold rolling a hot rolled steel bar. This entails passing the hot rolled bar through a series of dies at room temperature, which decreases its diameter and increases its length. Through the cold drawing process, the steel acquires specific mechanical properties, including enhanced surface finish, dimensional accuracy, and increased strength. Cold finished steel bars possess a sleek, glossy surface and are renowned for their precise tolerances and consistent size and shape. They find common usage in applications requiring precision and high-quality surface finish, such as the automotive, aerospace, and machining industries. Conversely, a turned steel round bar is created by machining a hot rolled or cold finished bar on a lathe. The bar is secured and rotated while a cutting tool eliminates material from its outer surface, resulting in the desired shape and dimensions. This turning process yields a bar with a rougher surface compared to a cold finished bar. However, it enables faster production and versatility in creating diverse shapes and sizes. Turned steel bars are frequently employed in applications where the surface finish is not crucial but machining operations are necessary, such as in the construction, engineering, and manufacturing industries. In conclusion, the distinction between a cold finished and a turned steel round bar lies in the manufacturing process and the resulting properties. Cold finished bars are produced through cold drawing or cold rolling, leading to improved dimensional accuracy, surface finish, and strength. Turned bars are machined on a lathe, providing flexibility in shape and size but with a rougher surface finish. The choice between the two depends on the specific requirements of the application, including tolerance, surface finish, strength, and machinability.
- Q: What are the different types of steel round bar alloys for improved corrosion resistance?
- There are several types of steel round bar alloys that are known for their improved corrosion resistance. Some of the commonly used alloys include stainless steel, weathering steel, and duplex stainless steel. 1. Stainless Steel: This alloy contains a minimum of 10.5% chromium, which forms a thin, protective layer of chromium oxide on the surface of the steel. This layer acts as a barrier against corrosion, making stainless steel highly resistant to rust and other forms of corrosion. Different grades of stainless steel, such as 304 and 316, offer varying levels of corrosion resistance depending on the specific application. 2. Weathering Steel: Also known as Corten steel, weathering steel develops a protective rust-like appearance when exposed to the weather. This self-healing characteristic makes it resistant to atmospheric corrosion. The addition of copper, chromium, and nickel in weathering steel enhances its corrosion resistance and enables it to withstand harsh environmental conditions without the need for painting. 3. Duplex Stainless Steel: Duplex stainless steel is a combination of austenitic and ferritic stainless steels. This alloy offers excellent corrosion resistance due to its high chromium and molybdenum content. Duplex stainless steel is particularly resistant to localized corrosion, such as pitting and crevice corrosion, making it suitable for applications in aggressive environments like marine and chemical industries. It is important to note that the choice of steel round bar alloy for improved corrosion resistance depends on the specific application requirements and environmental conditions. Consulting with a materials engineer or corrosion specialist can help determine the most suitable alloy for a particular application.
- Q: What are the advantages of using heat-treatable steel round bars?
- There are several advantages to using heat-treatable steel round bars. Firstly, heat treatment allows for increased strength and hardness, making the bars suitable for applications that require high durability and load-bearing capacity. Secondly, heat-treatable steel round bars can be easily machined and fabricated into various shapes and sizes, providing flexibility in design and manufacturing processes. Additionally, heat treatment enhances the bars' resistance to wear, corrosion, and fatigue, increasing their lifespan and reducing maintenance costs. Lastly, the ability to customize the heat treatment process enables the bars to meet specific performance requirements, making them a preferred choice in industries such as automotive, aerospace, and construction.
- Q: How do you check the quality of a steel round bar?
- To check the quality of a steel round bar, several methods can be employed. Firstly, visual inspection is crucial, where one should look for any surface defects, such as cracks, pits, or unevenness. Next, measurements of diameter, length, and straightness should be taken using appropriate tools. Additionally, conducting a hardness test using a hardness tester can determine the bar's hardness, ensuring it meets the required specifications. Other quality checks may involve verifying the chemical composition and performing non-destructive tests like ultrasonic or magnetic particle inspections to identify any internal flaws. Ultimately, a comprehensive assessment combining these various methods will help ascertain the overall quality of the steel round bar.
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Carbon Structural Steel Square Bars ST37-2CR
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 120000 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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