S20C-B/S45C-B Steel Round Bar

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 5 m.t.

Supply Capability:: 100000 m.t./month

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Specifications

1. 2080
1. cold work mould/die steel
2. High carbon high chromium type ledeburite
3. High hardness wear resistance

Product description

1. Cr12 steel is a widely used cold work die steel, a type of high carbon high chromium ledeburite . The steel has good hardenability and good abrasion resistance

2. Mainly used to with stand the impact load is smaller, and require high abrasion resistance Die and punch, cold-cut scissors, drill sets, gauges, drawing die, pressure die thread rolling board, drawing die thread rolling die.

Chemical composition(for reference only)

1.2080 Cold work die steel round bar

Delivery of hardness and quenching hardness

Steel name	Delivery status		Quenched specimens
Steel name	Hardness HBW	Impressiondiameter (mm)	Quenching temperature/°C	Cooling medium	hardness ≥HRC
Cr12	269~217	3.7~4.1	950~1000	oil	60

Physical properties

Cr12 critical temperature

Critical point	Ac1	Acm	Ar1	Arcm	Ms
temperature(approximation)/°C	810	835	755	770	180

Cr12 Hot Working Technology

Item	Heating temperature/°C	start forging temperature/°C	final forging temperature/°C	type of cooling
Steel ingot	1140~1160	1100~1120	900~920	Slow cooling
Steel billet	1120~1140	1080~1100	880~920	Slow cooling

Cr12 heat treatment

between the quenching temperature and the hardness of the relationship

quenching temperature/°C	875	900	925	950	975	1000	1050	1100
Hardness HRC	54.5	57	60	62.5	65	66	64	59.5

Delivery status: steel delivered in the annealed condition

We are professional manufacture of tool steel. We can provide various kinds of tool steel and mould steel. If you have any question regarding our products ,please feel free to let us know. We assure you will receive our best attention to your enquiry.

Products

S20C-B/S45C-B Steel Round Bar

Q: Are steel round bars susceptible to cracking?: Cracking in steel round bars can occur under certain circumstances. Factors that contribute to cracking include high stress levels, improper heat treatment, and the presence of impurities or defects in the material. Cracking is also more likely with sudden temperature changes or excessive loading. It is worth noting that the susceptibility to cracking varies depending on the grade and composition of the steel. Low carbon or mild steel is generally less prone to cracking compared to higher carbon or alloy steels. To prevent cracking, it is crucial to handle and store steel round bars properly. This includes avoiding dropping or mishandling the bars and storing them in a dry, controlled environment to prevent corrosion. Proper heat treatment processes, such as annealing or tempering, can improve the structural integrity of steel round bars and reduce the risk of cracking. Regular inspections and testing for defects or impurities can help identify and address issues before they lead to cracking. In conclusion, while steel round bars can be susceptible to cracking, taking appropriate precautions and using proper manufacturing and handling techniques can minimize the risk and ensure the bars' integrity.

Q: What is the difference between a centerless ground and a rough turned steel round bar?: A centerless ground steel round bar and a rough turned steel round bar differ in terms of their manufacturing processes and resulting surface finishes. A centerless ground steel round bar is produced by feeding the bar through a grinding machine that removes material from the surface to achieve precise diameter and roundness tolerances. This process involves rotating the bar between two grinding wheels while applying pressure to remove any imperfections and create a smooth, polished surface finish. The end result is a highly accurate and consistent diameter with a mirror-like finish, making it suitable for applications that require tight tolerances and a polished appearance. On the other hand, a rough turned steel round bar is manufactured through a different machining process called turning. This involves rotating the bar against a cutting tool that removes material from the surface in order to achieve the desired diameter and shape. However, unlike centerless grinding, turning does not provide the same level of precision and surface finish. The resulting surface of a rough turned bar will have visible tool marks and a rougher texture compared to a centerless ground bar. In summary, the main difference between a centerless ground steel round bar and a rough turned steel round bar lies in their manufacturing processes and resulting surface finishes. Centerless grinding offers a more precise diameter, roundness, and smoother surface finish, making it ideal for applications that require tight tolerances and a polished appearance. Rough turning, while less precise and with a rougher surface finish, is still suitable for applications that do not require the same level of precision or aesthetic appeal.

Q: What is the difference between a rough turned and a polished steel round bar?: A rough turned steel round bar has undergone a preliminary machining process that removes surface imperfections and excess material, providing a slightly smoother finish. On the other hand, a polished steel round bar has undergone further polishing or grinding processes to achieve a much smoother and aesthetically appealing surface finish.

Q: Can steel round bars be used in the manufacturing of consumer goods?: Consumer goods manufacturing can make use of steel round bars. Steel is a durable and versatile material that finds wide application across industries, including the production of consumer goods. Steel round bars can be molded, cut, and shaped into various components or parts that are required for items like furniture, appliances, tools, and machinery. The strength and resilience of steel make it a perfect choice for consumer goods that demand robust and long-lasting materials. Moreover, steel can be easily customized and finished with coatings or treatments to enhance its appearance or protect it from corrosion, thereby making it even more suitable for use in consumer goods. In summary, the usage of steel round bars is common in consumer goods manufacturing due to their dependable nature, versatility, and ability to provide the desired quality and functionality.

Q: Are steel round bars suitable for use in the automotive industry?: Yes, steel round bars are commonly used in the automotive industry due to their strength, durability, and versatility. They are used in various applications such as axle shafts, drive shafts, suspension components, and engine parts. The high tensile strength and resistance to wear make steel round bars ideal for handling heavy loads and enduring demanding conditions in vehicles.

Q: What are the different types of steel round bars used in the automotive engine components?: There are several different types of steel round bars used in automotive engine components, each with their own specific properties and applications. 1. Carbon Steel Round Bars: These are the most common type of steel round bars used in automotive engine components. They are known for their high strength and durability, making them suitable for various applications such as crankshafts, connecting rods, and camshafts. Carbon steel round bars can withstand high levels of stress and are capable of withstanding extreme temperatures. 2. Alloy Steel Round Bars: Alloy steel round bars are made by adding different alloying elements such as chromium, nickel, and molybdenum to carbon steel. This enhances their strength, toughness, and wear resistance. Alloy steel round bars are commonly used in automotive engine components like gears, shafts, and bearings where high strength and resistance to wear and fatigue are required. 3. Stainless Steel Round Bars: Stainless steel round bars are highly corrosion-resistant and are often used in automotive engine components that come into contact with corrosive fluids or environments. They are commonly used in applications such as valves, pistons, and exhaust systems. 4. Tool Steel Round Bars: Tool steel round bars are characterized by their high hardness, resistance to abrasion, and excellent toughness. They are commonly used in automotive engine components that require cutting or shaping, such as cutting tools, dies, and punches. 5. High-Speed Steel Round Bars: High-speed steel round bars are designed to withstand high temperatures and maintain their hardness and cutting ability at high speeds. They are frequently used in automotive engine components like drills, milling cutters, and reamers. It's important to note that the specific type of steel round bar used in automotive engine components will depend on the specific application, performance requirements, and cost considerations. Automotive manufacturers carefully select the appropriate steel grade to ensure optimal performance and durability of engine components.

Q: Can steel round bars be used for making suspension components?: Yes, steel round bars can be used for making suspension components. Steel is a common material used in the manufacturing of suspension components due to its high strength and durability. Steel round bars can be machined or forged into various shapes and sizes to meet the specific requirements of suspension components such as control arms, sway bars, and tie rods. The use of steel round bars ensures the suspension components can withstand the forces and stresses encountered during vehicle operation, providing stability, control, and safety.

Q: Can steel round bars be used for valve stem applications?: Yes, steel round bars can be used for valve stem applications. Steel round bars are commonly used in various industrial applications due to their high strength and durability. In valve stem applications, steel round bars are often used to provide stability and structural support to the valve stem, ensuring smooth operation and long-term performance. Additionally, steel round bars can be easily machined and fabricated to meet specific requirements, making them a versatile choice for valve stem applications.

Q: What is the toughness of a steel round bar?: The toughness of a steel round bar refers to its ability to resist fracture or deformation under stress. It is a measure of how well the steel can absorb energy and withstand impact without breaking. The toughness of a steel round bar depends on various factors such as the composition of the steel, its microstructure, and any heat treatment it has undergone. Generally, high-strength and alloy steels tend to have higher toughness due to their enhanced mechanical properties. Additionally, factors such as the presence of impurities, grain size, and the presence of any defects or cracks within the material can also affect its toughness. To determine the toughness of a steel round bar, tests such as the Charpy impact test or the Izod test are commonly performed to measure the energy absorbed by the material before it fractures. Overall, the toughness of a steel round bar is an important characteristic to consider when selecting a material for applications where high impact resistance is required, such as in construction, automotive, or aerospace industries.

Q: What are the different types of steel used for round bars?: There are several different types of steel used for round bars, including carbon steel, alloy steel, stainless steel, and tool steel. Each type has its own unique composition and properties, making them suitable for various applications and industries.

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