C22 Carbon Steel Round Bars

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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Chemical Composition	Mechanical Properties (In Quenched & Tempered State)
C	0.37-0.44 %	Tensile strength(MPA)	≥980(100)
Si	0.17-0.37 %	Yield strength (MPA)	≥785(80)
Mn	0.50-0.80 %	Elongation (δ5/%)	≥9
Cr	0.80-1.10 %	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	≤207HB
Cu	≤0.030 %

Grade/Material	1020 1045 4140 4130 4150 ASTM A36 A105 S20C S45c SCM440
Available sizes	Round: Dia. 9.5–300mm Square:88-160160mm Flat: Thickness 10–120mm, width 305 – 2200mm
Size tolerance	Length tolerance:+100mm/-0mm Straigthness:<=3mm/m
Delivery condition	Hot rolled or cold drawn or forged, turned or black surface, annealed or QT as customer’s request
Applications	Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.
Inspection	100% Ultrasonic according to the test standards: SEP1921-84,GR.3 CLASS C/C
Packing situation	In bundle or as customer required
Process	EAF+LF+VD ( necessary) +UT+ Peeled(optional) +Turned (optional) + Heat Treatment (optional)
Delivery time	30days after the down payment
Payment term	T/T or L/C

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)

Carbon Steel	Mold bottom, Plastic mold, Construction machinery parts Automobile parts, Security grills, Screens, Construction
Bearing Steel	Aerospace, Navigation, Nuclear energy, Chemical industry Electronic information, Petrochemical, Instrument and meter Transportation
Cr-Mo Steel	Mechanism & Fasteners gear, Stressed components for vehicles Engines and machines, Parts of larger cross-section
Gear Steel	All kinds of gears, Statically and dynamically stressed component for vehicles Engines and machine, Larger cross-section parts, Crankshafts

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 is the modulus of elasticity of a steel round bar?: The modulus of elasticity of a steel round bar, also known as Young's modulus, is a measure of its stiffness and ability to withstand deformation when subjected to an applied force. The modulus of elasticity for steel is typically around 200 GPa (Gigapascals). This means that for every unit of stress applied to the steel round bar, it will undergo an elastic deformation of approximately 0.0035-0.005, depending on the specific grade and composition of the steel. The modulus of elasticity is an important property to consider in structural and mechanical engineering applications, as it determines the amount of deflection or deformation that can be expected under different loading conditions.

Q: What are the advantages of using duplex steel round bars?: One of the main advantages of using duplex steel round bars is their superior strength and corrosion resistance. Duplex steel is a combination of austenitic and ferritic stainless steels, which provides a unique combination of properties. This type of steel offers higher strength compared to austenitic stainless steel, making it suitable for applications that require durability and load-bearing capacity. Additionally, duplex steel round bars exhibit excellent resistance to corrosion, especially in harsh environments such as marine or chemical industries. This resistance to corrosion makes them a cost-effective choice, as they require less maintenance and have a longer lifespan. Overall, the use of duplex steel round bars can improve the longevity, reliability, and performance of various industrial applications.

Q: What is the difference between a peeled and a centerless ground steel round bar?: A peeled steel round bar refers to a process where the outer surface of the bar is removed, typically by using a peeling machine, to achieve a smooth and precise surface finish. This process helps to remove any imperfections or scale on the surface of the bar, resulting in a clean and polished appearance. The peeled round bar also undergoes a sizing process to ensure its dimensional accuracy, making it suitable for various applications where a smooth surface finish and precise dimensions are important. On the other hand, a centerless ground steel round bar refers to a process where the bar is ground using a centerless grinding machine. This process involves feeding the bar through grinding wheels that rotate at different speeds, removing material from the bar's outer diameter to achieve the desired size and surface finish. Centerless grinding allows for tight tolerances and precise sizing, making it suitable for applications that require high precision and accuracy. In summary, the main difference between a peeled and a centerless ground steel round bar lies in the process used to achieve the desired surface finish and dimensional accuracy. While both processes result in a smooth and precise bar, peeling removes material from the outer surface, whereas centerless grinding removes material from the outer diameter. The choice between the two depends on the specific requirements of the application and the desired surface finish and dimensional accuracy.

Q: How do you measure the hardness of a steel round bar?: The hardness of a steel round bar can be measured using various methods, with the most common being the Rockwell hardness test. In this test, a diamond or steel ball indenter is pressed into the surface of the steel at a specific load, and the depth of the indentation is measured. The hardness value is determined based on the depth of the indentation and the applied load. Other methods like Brinell and Vickers hardness tests can also be used, depending on the specific requirements and characteristics of the steel.

Q: What are the different tolerances for steel round bars?: The different tolerances for steel round bars depend on various factors such as the diameter, length, and intended application. Common tolerances for steel round bars include diameter tolerances ranging from +/- 0.005 inches to +/- 0.030 inches, length tolerances ranging from +/- 0.125 inches to +/- 0.500 inches, and straightness tolerances ranging from 0.0125 inches per foot to 0.030 inches per foot. However, specific tolerances may vary depending on the specific requirements set by the industry or customer.

Q: Can steel round bars be used for making brake components?: Absolutely! When it comes to creating brake components, steel round bars are a fantastic choice. This is because steel possesses exceptional strength, durability, and heat resistance, making it a popular material in brake systems. By machining and shaping steel round bars, one can effortlessly fashion different brake components like brake discs, brake rotors, brake calipers, and brake pistons. The utilization of steel round bars guarantees that these brake components can effortlessly endure the intense pressures and temperatures produced during braking, resulting in a dependable and effective stopping ability.

Q: Can steel round bars be used for making steering components?: Yes, steel round bars can be used for making steering components. Steel is a commonly used material for steering system components due to its high strength and durability. Steel round bars can be machined or forged into various shapes and sizes to create steering components such as steering shafts, tie rods, and drag links. These components need to be able to withstand the forces and stresses exerted on them during steering and steel's properties make it suitable for this purpose. Additionally, steel is readily available and cost-effective, making it a popular choice for manufacturing steering components in various industries, including automotive and aerospace.

Q: Can steel round bars be used for making fencing?: Yes, steel round bars can be used for making fencing. Steel round bars are commonly used in fencing applications due to their strength, durability, and resistance to corrosion. They provide a sturdy framework for fences and can be easily welded or attached to other fencing materials.

Q: How do you calculate the weight of a steel round bar based on its length and diameter?: To calculate the weight of a steel round bar based on its length and diameter, you can use the following equation: Weight = (π/4) x (Diameter^2) x Length x Density Here, π represents the mathematical constant pi (approximately 3.14159), Diameter is the measurement of the steel round bar across its widest point, Length is the overall length of the bar, and Density is the density of steel, which is typically around 7850 kilograms per cubic meter. To calculate the weight, first square the diameter, then multiply it by the length and density. Finally, multiply the result by π/4 to obtain the weight of the steel round bar in the desired units (typically kilograms or pounds). It's important to note that this equation assumes the steel round bar is a solid cylinder with a uniform diameter. If the bar has any variations or irregularities, the weight calculated using this equation may not be entirely accurate.

Q: Are steel round bars suitable for bicycle frame applications?: Yes, steel round bars are suitable for bicycle frame applications. Steel is a popular material choice for bicycle frames due to its strength, durability, and versatility. Steel round bars provide excellent structural integrity, making them ideal for supporting the weight and stress placed on a bicycle frame during use. Additionally, steel is known for its high fatigue resistance, which means it can withstand repeated loading and unloading without losing its strength. Steel round bars also offer good weldability, allowing for easy construction and repair of bicycle frames. Overall, steel round bars are a reliable and practical choice for bicycle frame applications.

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