Hot Rolled Mild Steel Round Bar Q235 Q345 Q235B Q345B

Hot Rolled Mild Steel Round Bar Q235 Q345 Q235B Q345B System 1

Hot Rolled Mild Steel Round Bar Q235 Q345 Q235B Q345B System 2

Hot Rolled Mild Steel Round Bar Q235 Q345 Q235B Q345B System 3

Hot Rolled Mild Steel Round Bar Q235 Q345 Q235B Q345B System 4

Hot Rolled Mild Steel Round Bar Q235 Q345 Q235B Q345B

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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Diameter(mm)	Φ6 ,Φ8,Φ10,Φ12,Φ13,Φ14,Φ16,Φ18,Φ20,Φ22,Φ25,Φ28,Φ32,
Length(m)	Unfolded / Straight Bundles weighing upto 2 Metric Tons and lengths is 6 Meters upto 15 Meters or according customers require
U Shaped folded Bundles weighing up to 2 Metric Tons and lengths is 12 Meters
Rounded Coils ~ up to 2 Metric Ton Coils for Bending / Cutting Machine use.
Standard	GB(HRB335/HRB400/HRB500);
BS4449 -1997 GRADE 250B, 460B; BS4449-2005 GRADE 500B;
ASTM A615 GRADE 40,GRADE60,GRADE75; ASTM A706;
DIN488-1 420S/500S, BST500S
JIS G3112 SD35, SD40, SD50,SD390
NFA 35016 FE E 400, FE E 500
CA 50/60
GOST A3 R A500C
Surface finished	Screw-thread
Epoxy coating
Galvanized coating
Production facility	Imports of production equipment from Italy
Production capacity	50,000 MT/month
Payment term	T/T or 100% L/C at sight
Package	By bundles. One bundles about 2-3tons

Dia mm	Theoretical weight kg/m	Dia mm	Theoretical weight kg/m
12	0.888	25	6.85
14	1.21	28	4.83
16	1.58	29	5.06
18	2.00	32	6.31
19	2.235	36	7.99
20	2.47	40	9.87
22	2.98	50	15.42

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 are the different types of steel round bars used in the manufacturing of shafts?: There are several different types of steel round bars that are commonly used in the manufacturing of shafts. The choice of steel round bar depends on the specific requirements and application of the shaft. Here are some of the most commonly used types: 1. Carbon Steel Round Bars: These are the most common type of steel round bars used in shaft manufacturing. Carbon steel offers good strength and toughness, making it suitable for various shaft applications. 2. Alloy Steel Round Bars: Alloy steel round bars are made by adding other elements such as chromium, nickel, or molybdenum to carbon steel. This enhances the strength, hardness, and wear resistance of the shaft, making it suitable for demanding applications. 3. Stainless Steel Round Bars: Stainless steel is highly corrosion resistant and offers excellent mechanical properties. It is commonly used in shafts that require resistance to corrosion, high temperatures, or harsh environments. 4. Tool Steel Round Bars: Tool steel round bars are known for their exceptional hardness, toughness, and wear resistance. They are used in shafts for cutting tools, molds, and dies that require high performance and durability. 5. High-Speed Steel Round Bars: High-speed steel round bars are primarily used in shafts for cutting tools such as drills, mills, and taps. They have excellent heat resistance and can withstand high cutting speeds without losing their hardness. 6. Mild Steel Round Bars: Mild steel round bars are low carbon steel bars that offer good weldability and machinability. They are commonly used in shafts for less demanding applications that do not require high strength or hardness. It is important to consider the specific requirements, such as strength, hardness, corrosion resistance, and temperature resistance, when selecting the appropriate type of steel round bar for manufacturing shafts.

Q:Can steel round bars be heat treated?: Yes, steel round bars can be heat treated. Heat treatment involves subjecting the steel to a specific heating and cooling process to alter its physical and mechanical properties, such as hardness, strength, and ductility. This process can be applied to steel round bars to enhance their performance for various applications.

Q:Can steel round bars be used for making heat exchangers?: Steel round bars are suitable for constructing heat exchangers. Steel is widely used in heat exchangers because it has great thermal conductivity, high strength, and corrosion resistance. Steel round bars can be easily machined and molded to match the specific design needs of a heat exchanger. Moreover, steel is easily accessible and cost-efficient, making it a popular option for manufacturing heat exchangers in different industries. However, it is crucial to take into account the particular application and operating conditions of the heat exchanger to ensure that the selected steel grade is compatible and capable of enduring the necessary temperature and pressure.

Q:What is the difference between a hot rolled and a cold drawn steel round bar?: The main difference between a hot rolled and a cold drawn steel round bar lies in their production process and resulting characteristics. Hot rolled steel round bars are produced by heating a billet or ingot to a high temperature and then shaping it into the desired form, typically through rolling. This process results in a rough, scaled surface with rounded edges. Hot rolling allows for larger sizes and quantities to be produced quickly and efficiently. The steel is less precise in terms of dimensions and has a lower surface finish quality compared to cold drawn steel. On the other hand, cold drawn steel round bars are produced by pulling a hot rolled bar through a die at room temperature, which results in a smooth, polished surface with tighter dimensional tolerances. This process enhances the mechanical properties of the steel, such as improved strength, hardness, and dimensional accuracy. Cold drawing also provides a better surface finish and closer dimensional control compared to hot rolling. In terms of applications, hot rolled steel round bars are commonly used in construction, manufacturing, and general fabrication due to their lower cost and ease of production. They are suitable for applications where precision and surface finish are not critical factors. Cold drawn steel round bars, on the other hand, are often utilized in more demanding applications that require superior dimensional accuracy, surface finish, and mechanical properties. They are commonly used in automotive, aerospace, and machinery industries, where precision and quality are paramount. In summary, the main differences between hot rolled and cold drawn steel round bars lie in their production process, resulting surface finish, dimensional accuracy, and mechanical properties. The choice between the two depends on the specific requirements and applications of the steel.

Q:How do you calculate the load capacity of a steel round bar?: To determine the load capacity of a steel round bar, multiple factors must be taken into consideration. The load capacity relies on both the material properties of the steel and the dimensions of the round bar. Primarily, knowledge of the steel's yield strength is necessary. The yield strength refers to the maximum stress the material can withstand before it permanently deforms. This information can typically be obtained from steel manufacturers or material specification databases. Afterward, the diameter of the round bar should be measured. The diameter plays a crucial role in determining the bar's cross-sectional area, which directly affects its load-bearing capacity. The cross-sectional area can be calculated using the formula A = πr^2, where A represents the area and r is the radius of the round bar. Once the yield strength and cross-sectional area are determined, the maximum load capacity of the steel round bar can be calculated using the formula Load = Yield Strength * Cross-sectional Area. This calculation provides the maximum load that the bar can handle without experiencing permanent deformation. It is important to note that the load capacity calculated through this method assumes a uniform distribution of stress and does not account for factors like bending, torsion, or any other specific loading conditions. Therefore, it is always advisable to consult a structural engineer or refer to appropriate design codes and standards to ensure accurate calculations for a specific application.

Q:What are the different types of steel round bars used in the manufacturing of cutting tools?: In the manufacturing of cutting tools, there are various types of steel round bars commonly used. These include: 1. High-Speed Steel (HSS): HSS round bars possess exceptional hardness, wear resistance, and the ability to maintain a sharp cutting edge even at high temperatures. They find extensive use in metalworking and high-speed applications for the production of drills, end mills, and other cutting tools. 2. Tool Steel: Tool steel round bars are widely utilized in cutting tool production due to their high strength, toughness, and resistance to wear and deformation. Different grades of tool steel, such as D2, A2, and O1, are selected based on the specific requirements and applications of the cutting tool. 3. Carbon Steel: Cutting tools designed for softer materials like wood and plastics often incorporate carbon steel round bars. Carbon steel offers satisfactory hardness and durability, making it suitable for a wide range of cutting applications. 4. Stainless Steel: Cutting tools requiring superior corrosion resistance and strength often employ stainless steel round bars. Stainless steel provides good durability, toughness, and edge retention, making it a popular choice in industries such as food, medicine, and other cleanliness-sensitive applications. 5. Alloy Steel: The production of alloy steel round bars involves the addition of various alloying elements like chromium, molybdenum, and vanadium to enhance its properties. Alloy steel exhibits improved hardness, strength, and wear resistance, making it suitable for demanding cutting applications like machining hardened materials and high-temperature cutting. Choosing the appropriate type of steel round bar for a cutting tool is crucial and depends on specific requirements such as the material being cut, desired cutting speed, and expected operating conditions.

Q:What is the maximum copper content allowed for steel round bars?: The permissible copper content in steel round bars varies depending on the grade and industry standards. Generally, copper is regarded as an alloying element in steel and is usually added in small quantities to improve specific properties. For most steel round bars, the maximum acceptable copper content typically ranges from 0.50% to 1.00%. However, it is crucial to consider that this may differ based on the application and grade of steel utilized. To determine the maximum allowable copper content, it is advisable to refer to the applicable industry standards or specifications for the specific steel grade and application.

Q:How do steel round bars resist corrosion?: Steel round bars resist corrosion through a combination of factors. Firstly, steel itself is an alloy made primarily of iron and carbon, and the addition of other elements such as chromium, nickel, and molybdenum enhances its corrosion resistance. These alloying elements form a protective oxide layer on the surface of the steel, which acts as a barrier against corrosive elements in the environment. Furthermore, steel round bars can undergo additional surface treatments or coatings to further enhance their resistance to corrosion. One common method is galvanization, where the steel is coated with a layer of zinc. This zinc coating serves as a sacrificial layer, corroding first before the steel itself is affected. Additionally, steel round bars can be coated with epoxy or other polymer coatings to provide an extra layer of protection. It is also important to note that the manufacturing process and quality of the steel round bars play a significant role in their corrosion resistance. Proper heat treatment, refining processes, and quality control measures ensure that the steel has a homogeneous microstructure and minimal impurities, reducing the likelihood of corrosion. Overall, the combination of alloying elements, surface treatments, and quality manufacturing processes contribute to the corrosion resistance of steel round bars, making them a reliable choice for applications in corrosive environments.

Q:Can steel round bars be used for making automotive suspension systems?: Yes, steel round bars can be used for making automotive suspension systems. Steel round bars are commonly used in the manufacturing of suspension components such as control arms, sway bars, and torsion bars due to their high strength, durability, and ability to withstand heavy loads and vibrations.

Q:Are steel round bars available in metric sizes?: Yes, steel round bars are available in metric sizes.

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