Carbon Steel Bar 1020 S20C C22

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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	0.17-0.23 %	Tensile strength(MPA)	≥253
Si	0.17-0.37 %	Yield strength (MPA)	≥245
Mn	0.35-0.65 %	Elongation (δ5/%)	≥25
Cr	≤0.25 %	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	≤156HB
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: What are the advantages of using nickel-manganese alloy steel round bars?: Nickel-manganese alloy steel round bars provide numerous benefits in various applications. To begin with, these round bars exhibit exceptional strength and toughness. The incorporation of nickel and manganese significantly enhances the overall strength and durability of the steel, rendering it suitable for heavy-duty applications that demand high strength and resistance to wear and tear. As a result, industries such as construction, automotive, and manufacturing find these alloy steel round bars highly advantageous. Additionally, nickel-manganese alloy steel round bars possess outstanding corrosion resistance properties. The nickel content in the alloy imparts remarkable resistance to corrosion, making it ideal for use in harsh environments or situations where exposure to corrosive substances is common. Consequently, the lifespan of these round bars is extended, reducing the need for frequent maintenance or replacement. Moreover, these round bars demonstrate excellent heat resistance. They can withstand elevated temperatures without compromising their structural integrity, making them suitable for applications involving extreme heat or thermal cycles. Industries like aerospace, power generation, and oil and gas greatly benefit from this heat resistance property. Furthermore, nickel-manganese alloy steel round bars offer favorable weldability and machinability. The composition of the alloy facilitates easy welding and machining, allowing manufacturers to fabricate components or structures with ease. This versatility in processing makes the round bars highly adaptable to varying manufacturing processes and requirements. Moreover, these round bars exhibit good ductility and formability. The alloy's composition permits easy shaping or forming into various configurations without sacrificing its structural integrity. Consequently, they are suitable for applications that necessitate complex shapes or intricate designs. In conclusion, the advantages of utilizing nickel-manganese alloy steel round bars encompass exceptional strength, corrosion resistance, heat resistance, weldability, machinability, and formability. These properties make these round bars a dependable and versatile choice for a broad range of applications across different industries.

Q: What is the resistance to fatigue of a steel round bar?: The ability of a steel round bar to resist fatigue refers to its capacity to endure repeated cycles of loading and unloading without failing or deforming. Fatigue resistance is a crucial mechanical property for materials utilized in diverse applications, including structural components, machinery, and automotive parts. Several factors influence the fatigue resistance of a steel round bar, including the specific grade of steel, its microstructure, surface condition, and the applied loading conditions. Steel is widely recognized for its exceptional fatigue resistance in comparison to other materials, which explains its extensive utilization across various industries. The high strength, ductility, and presence of various alloying elements in steel contribute to its resistance to fatigue. These characteristics enable steel to endure cyclic loading without significant deformation or weakening. Moreover, the microstructure of the steel, such as grain size and distribution, significantly impacts its fatigue resistance. Engineers typically conduct fatigue tests, such as rotating beam or axial loading tests, to assess the fatigue resistance of a steel round bar. These tests subject the steel bar to controlled cyclic loading and measure the number of cycles it can withstand before failure occurs. The results determine the fatigue strength or fatigue limit of the steel, representing the maximum stress level it can indefinitely endure without failing. It is important to acknowledge that the fatigue resistance of a steel round bar can vary due to factors like surface defects, stress concentration, and environmental conditions. Therefore, proper design considerations, such as surface treatments, stress reduction techniques, and appropriate loading specifications, are crucial to ensure the desired fatigue performance of the steel round bar in specific applications.

Q: Can steel round bars be machined using CNC equipment?: Indeed, CNC equipment is capable of machining steel round bars. By utilizing computer programs to govern the movement of cutting tools, CNC machines can execute a vast array of operations on diverse materials, including steel round bars. These operations encompass turning, milling, drilling, and threading, effectively achieving the desired shape, dimensions, and surface finish. Notably, CNC machines exhibit exceptional repeatability, consistency, and efficiency, rendering them an optimal selection for machining steel round bars in industries such as automotive, aerospace, construction, and manufacturing.

Q: Are steel round bars available in different lengths?: Yes, steel round bars are available in different lengths.

Q: Are steel round bars suitable for the production of fasteners?: Yes, steel round bars are suitable for the production of fasteners. Steel is a strong and durable material, making it ideal for fasteners that require high strength and stability. The cylindrical shape of round bars allows for easy machining and shaping into various types of fasteners such as bolts, screws, and studs. Additionally, steel round bars can be heat-treated to enhance their mechanical properties, making them even more suitable for use in fasteners.

Q: How are steel round bars inspected for quality?: Steel round bars are inspected for quality through various methods to ensure that they meet the required standards. The inspection process typically involves both visual examination and testing procedures. Visual inspection is the first step in assessing the quality of steel round bars. Qualified inspectors visually examine the bars for surface defects such as cracks, scratches, dents, or any other irregularities that may affect the structural integrity or performance of the bars. Additionally, dimensional inspection is conducted to verify the diameter, length, straightness, and overall shape of the round bars. This is done using precision measuring instruments to ensure that the bars meet the specified tolerances and requirements. Aside from visual inspection, various testing methods are employed to evaluate the mechanical properties and chemical composition of the steel round bars. The most common testing procedures include: 1. Tensile Testing: This test measures the strength and ductility of the steel bars by subjecting them to tension until they fracture. It helps determine the ultimate tensile strength, yield strength, and elongation of the material. 2. Hardness Testing: It is performed to assess the hardness of the steel round bars, which is an indicator of its resistance to deformation or wear. The most commonly used methods for hardness testing are Rockwell, Brinell, and Vickers hardness tests. 3. Ultrasonic Testing: This non-destructive testing method uses high-frequency sound waves to detect any internal defects or discontinuities in the steel bars. It helps identify flaws such as cracks, inclusions, or voids that may negatively impact the material's quality. 4. Chemical Analysis: Steel round bars undergo chemical analysis to determine the chemical composition and ensure it meets the required specifications. This analysis helps verify the percentages of different alloying elements present in the steel, ensuring it has the desired properties. All these inspection methods are conducted by trained professionals or certified third-party inspectors who are knowledgeable about the specific industry standards and guidelines. By combining visual examination and precise testing techniques, the quality of steel round bars can be thoroughly assessed, ensuring they are fit for their intended applications.

Q: How do steel round bars differ from steel square bars?: Steel round bars and steel square bars differ in their shape and cross-sectional design. While round bars possess a circular shape throughout their length, square bars have a square shape. This distinction affects their mechanical properties and applications. Round bars offer enhanced tensile strength and are often used in applications where rotational motion or bending is required, such as in construction, machining, and transportation industries. On the other hand, square bars provide more stability and structural support due to their flat sides, making them suitable for applications requiring load-bearing capabilities, like supports, frames, and braces. Ultimately, the choice between round bars and square bars depends on the specific requirements and intended use of the steel.

Q: How do you calculate the fatigue strength of a steel round bar?: To calculate the fatigue strength of a steel round bar, you typically conduct a fatigue test, also known as a fatigue life assessment. This involves subjecting the round bar to repeated loading cycles, with varying stress levels, until it fails. The number of cycles the bar can withstand before failure is the fatigue strength. This test helps determine the endurance limit or fatigue limit of the steel round bar, which represents the maximum stress level that the bar can endure indefinitely without failure.

Q: Can steel round bars be used in the manufacturing of bicycles?: Indeed, bicycles can be manufactured using steel round bars. These bars are commonly utilized in multiple aspects of bicycle construction, including the frame, handlebars, cranksets, and seatposts. Steel, being a robust and enduring material, can withstand the strains and pressures associated with cycling. Moreover, it is comparatively affordable when compared to alternatives like carbon fiber. By employing steel round bars, the necessary strength and stability required for a bicycle's structural components are guaranteed, thereby ensuring a secure and dependable ride. Furthermore, steel can be easily manipulated and shaped to conform to the specific design prerequisites of a bicycle, making it a versatile material for manufacturing purposes. All in all, the bicycle industry frequently favors steel round bars due to their resilience, sturdiness, and cost-effectiveness.

Q: What kind of steel pipe is round steel?: A round bar is not a steel tube. In brief, its section is round, but it is solid, and the cross section of the pipe is hollow.

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