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: Are steel round bars resistant to corrosion?: Yes, steel round bars can be resistant to corrosion depending on the type of steel and the environment they are exposed to. Stainless steel round bars, for example, contain chromium which forms a thin passive layer on the surface that protects against corrosion. This layer is self-repairing and provides excellent resistance to corrosion in many environments, including moisture, chemicals, and saltwater. However, carbon steel round bars are not inherently corrosion-resistant and may require additional protective coatings or treatments to prevent corrosion. Therefore, it is important to consider the specific type of steel and the intended application when determining the corrosion resistance of steel round bars.

Q: The difference between round face and round bar steel on concrete: Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter.

Q: What kind of steel is used for anchor bolt material? What's the quality of anchor bolt material?: The anchor bolt can be divided into fixed anchor bolt, movable anchor bolt, expansion anchor, anchor bolt and bond anchor bolt. According to the different shapes, they are divided into: L type embedded bolt, 9 type embedded bolt, U type embedded bolt, welding pre embedded bolt, bottom plate embedded bolt

Q: What is the difference between a bright and a precision ground steel round bar?: A bright steel round bar refers to a steel bar that has undergone a process called bright drawing, which involves passing the bar through a die to improve its surface finish and dimensional accuracy. On the other hand, a precision ground steel round bar is a bar that has been further processed by grinding to achieve extremely tight dimensional tolerances and a smooth surface finish. Therefore, the main difference lies in the level of surface finish and dimensional accuracy achieved through different manufacturing processes.

Q: Are steel round bars available in different surface finishes?: Yes, steel round bars are available in different surface finishes. The surface finish of a steel round bar refers to the treatment or coating applied to the surface to enhance its appearance, protect it from corrosion, or improve its performance in specific applications. Common surface finishes for steel round bars include polished, brushed, mill finish, galvanized, and coated with materials like chrome, nickel, or zinc. These different surface finishes cater to various requirements and preferences in terms of aesthetics, protection against corrosion, and functionality in different industries and applications.

Q: How do steel round bars differ from steel square bars?: Steel round bars and steel square bars differ in their shape and appearance. Steel round bars, as the name suggests, have a circular cross-section and are cylindrical in shape. This shape makes them ideal for applications that require strength and stability, such as construction, manufacturing, and engineering. The circular shape allows for equal distribution of stress and load, making round bars highly resistant to bending or twisting forces. They are commonly used as structural components in buildings, support beams, shafts, and axles. On the other hand, steel square bars have a square cross-section with four equal sides and sharp corners. This shape provides additional benefits in certain applications. Square bars offer better grip and handling, as they have flat surfaces, making them easier to hold, stack, or secure in place during fabrication or installation. They are often used for manufacturing machinery, tools, frames, and brackets where square edges are needed for precise alignment or stability. Both steel round bars and steel square bars are available in various grades and alloys, offering different levels of strength, hardness, and corrosion resistance. The choice between the two depends on the specific requirements of the project or application.

Q: What is the difference between a cold-drawn and a polished steel round bar?: A cold-drawn steel round bar and a polished steel round bar differ in their manufacturing processes and resulting properties. A cold-drawn steel round bar is produced by pulling or drawing a hot-rolled steel bar through a die or series of dies to reduce its diameter and increase its length. This process is done at room temperature, which imparts certain characteristics to the steel. Cold-drawn steel bars have a smooth and shiny surface, with tight dimensional tolerances and improved mechanical properties. The cold drawing process refines the microstructure of the steel, making it stronger, more uniform, and less prone to defects. These bars are commonly used in applications that require high strength, precision, and resistance to fatigue, such as automotive components, machinery, and tooling. On the other hand, a polished steel round bar undergoes a different treatment process. After the steel bar is formed, it goes through polishing, which involves grinding or buffing the surface to achieve a smooth and reflective finish. Polished steel bars have a shiny and mirror-like appearance due to the removal of surface imperfections and contaminants. This process is primarily done for aesthetic purposes and does not significantly alter the mechanical properties of the steel. Polished steel round bars are commonly used in decorative applications, architectural designs, and furniture. In summary, the main difference between a cold-drawn and a polished steel round bar lies in their manufacturing processes and intended applications. Cold-drawn bars undergo a precise cold drawing process to improve their mechanical properties, while polished bars are subjected to surface polishing for an aesthetically pleasing finish.

Q: Are steel round bars suitable for automotive applications?: Yes, steel round bars are commonly used in automotive applications due to their high strength, durability, and versatility. They are often used to manufacture components such as axles, crankshafts, and suspension systems, as they provide the necessary strength and support required for these critical automotive parts.

Q: What are the advantages of using molybdenum-alloy steel round bars?: There are several advantages of using molybdenum-alloy steel round bars in various applications. Firstly, molybdenum enhances the strength and hardness of the steel, making it an ideal choice for industries that require high strength materials. The addition of molybdenum improves the resistance to deformation under heavy loads, making the round bars more durable and long-lasting. Secondly, molybdenum-alloy steel round bars have excellent heat resistance properties. This makes them suitable for applications that involve high temperatures, such as in the manufacturing of heat exchangers, boilers, and furnace components. The steel's ability to withstand extreme temperatures without losing its strength and structural integrity is a significant advantage. Another advantage is the corrosion resistance provided by molybdenum. Molybdenum-alloy steel round bars exhibit superior resistance to corrosion in various environments, including acidic and alkaline conditions. This makes them an ideal choice for applications in corrosive industries such as chemical processing, oil and gas, and marine environments. Furthermore, molybdenum-alloy steel round bars offer excellent weldability and machinability. The molybdenum content ensures that the steel maintains its structural integrity during welding and machining processes, minimizing the risk of cracks or deformations. This ease of fabrication allows for greater flexibility in design and construction. In addition to these advantages, molybdenum-alloy steel round bars also offer good wear resistance, making them suitable for applications that involve abrasive conditions. Their ability to withstand wear and tear ensures a longer service life, reducing maintenance and replacement costs. Overall, the advantages of using molybdenum-alloy steel round bars include increased strength, heat resistance, corrosion resistance, weldability, machinability, and wear resistance. These properties make them a preferred choice in various industries where durability, reliability, and performance are essential.

Q: What is the maximum molybdenum content allowed for steel round bars?: The maximum molybdenum content allowed for steel round bars varies depending on the specific steel grade and industry standards. However, in general, the maximum molybdenum content in steel round bars is typically around 0.5% to 1.5% by weight.

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