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: Can steel round bars be used in the manufacturing of firearms?: Yes, steel round bars can be used in the manufacturing of firearms. Steel is a commonly used material for firearm construction due to its strength, durability, and ability to withstand high pressures and temperatures. Round bars made of steel can be machined, forged, or cold drawn to create various firearm components such as barrels, receivers, and bolts.

Q: How to make the round welds on flat steel flat and qualified?: On both sides of the steel and welded steel plate, each side of the weld length of 5 times the diameter of reinforcement, welding seam should be welded into a convex arc that is.

Q: Can steel round bars be used in the manufacturing of gears?: Certainly, gears can utilize steel round bars in their manufacturing process. The utilization of steel round bars is quite common in gear manufacturing given their remarkable attributes such as formidable strength, long-lasting durability, and remarkable resistance to wear and tear. The rounded shape of these bars allows for effortless machining and molding into the desired gear design. Furthermore, steel round bars possess exceptional mechanical properties, including impressive tensile strength and commendable resistance to fatigue, which are crucial for gears that encounter heavy loads and repetitive movements. Additionally, steel round bars can undergo heat treatment to further enhance their hardness and toughness, rendering them ideal for demanding gear applications. All in all, steel round bars are a highly favored option in gear manufacturing due to their adaptability and dependability.

Q: Can steel round bars be used for making handrails?: Yes, steel round bars can be used for making handrails. Steel round bars are commonly used in construction and fabrication due to their strength and durability. They can be easily shaped and welded to create handrails that provide support and safety for staircases, balconies, and other elevated areas. Additionally, steel round bars can be finished with various coatings or treatments to enhance their corrosion resistance and aesthetics. Overall, steel round bars are a popular choice for making handrails due to their strength, versatility, and ability to withstand heavy usage.

Q: What are the different types of steel round bars used in the manufacturing of springs?: There are several different types of steel round bars commonly used in the manufacturing of springs. These include: 1. Carbon steel round bars: These are the most commonly used type of steel for springs. They have a high carbon content, typically ranging from 0.60% to 0.95%. Carbon steel round bars offer good strength and durability, making them suitable for a wide range of spring applications. 2. Alloy steel round bars: These are made by adding alloying elements such as chromium, manganese, nickel, or vanadium to carbon steel. Alloy steel round bars provide enhanced mechanical properties, including higher strength, toughness, and resistance to wear and corrosion. They are often used in heavy-duty or high-performance spring applications. 3. Stainless steel round bars: These are corrosion-resistant steel bars with a high chromium content (usually above 10.5%). Stainless steel round bars are popular for springs that require excellent resistance to rust, oxidation, and chemicals. They are commonly used in applications where hygiene, cleanliness, and aesthetic appeal are important, such as in the food and medical industries. 4. Spring steel round bars: These are specifically designed for spring manufacturing. They have a unique combination of properties, including high yield strength, good fatigue resistance, and excellent elasticity. Spring steel round bars are typically made from either carbon steel or alloy steel, depending on the specific requirements of the application. It is important to choose the right type of steel round bar based on factors such as the intended application, load requirements, environmental conditions, and desired spring performance. Consulting with a materials engineer or spring manufacturer can help determine the most suitable steel round bar for a specific spring manufacturing project.

Q: How do you prevent warping of steel round bars during machining?: To prevent warping of steel round bars during machining, there are several measures that can be taken: 1. Proper Material Selection: Choosing the right type of steel with appropriate mechanical properties is crucial. Steel with lower carbon content and controlled alloying elements can help reduce the risk of warping during machining. 2. Pre-Machining Stress Relief: Steel round bars often have internal stresses that can lead to warping during machining. Conducting a stress relief process like annealing or normalizing before machining can help eliminate these internal stresses and minimize warping. 3. Controlled Machining Process: Employing proper machining techniques is vital to prevent warping. This includes using a rigid and stable machine setup, ensuring proper tool geometry and sharpness, and maintaining appropriate cutting speeds and feeds. Continuous monitoring of cutting forces and temperatures can also help in detecting any abnormal conditions that may contribute to warping. 4. Minimizing Heat Build-Up: Excessive heat generated during machining can cause localized expansion and lead to warping. To prevent this, coolant or lubricant should be used to dissipate heat and reduce friction between the tool and the workpiece. Adequate cooling can help maintain a stable temperature and prevent warping. 5. Proper Fixturing: When machining long steel round bars, using suitable fixtures or supports can help prevent excessive deflection or bending. This ensures that the bar remains straight and stable during machining, reducing the chances of warping. 6. Post-Machining Stress Relief: After machining, stress can still be present in the steel round bars. Performing a post-machining stress relief process, such as tempering or normalization, can help further relieve any residual stresses and minimize the risk of warping. By implementing these measures, the risk of warping during machining of steel round bars can be significantly reduced, leading to improved dimensional accuracy and overall quality of the machined parts.

Q: What are the different types of steel round bar surface defects?: There are several types of steel round bar surface defects, including pits, roll marks, scratches, cracks, scale, and decarburization.

Q: Can steel round bars be used for making musical instruments?: Musical instruments can indeed be made using steel round bars. Steel is an incredibly versatile material, known for its outstanding strength and durability. This makes it highly suitable for a wide range of applications, including the creation of musical instruments. Steel round bars can be utilized in the fabrication of various musical instrument components, such as strings, rods, and even the principal body of certain instruments. The precise type and grade of steel utilized will ultimately depend on the specific instrument and the desired sound quality. For instance, steel bars are commonly employed in percussion instruments like xylophones or vibraphones, as they generate diverse pitches and tones. Furthermore, steel round bars can be employed in the production of components for wind instruments, including saxophones and trumpets. Nevertheless, it is important to note that selecting the appropriate material for musical instruments is often a complex process. Factors such as resonance, tonal quality, and playability must all be carefully considered. While steel round bars can be utilized, other materials like brass, wood, or even synthetic substances may be preferred for certain instruments in order to achieve the desired sound characteristics.

Q: How do you calculate the weight of a steel round bar based on its volume and density?: To calculate the weight of a steel round bar based on its volume and density, you can use the formula: weight = volume x density.

Q: Can steel round bars be used in food processing industries?: Steel round bars are indeed suitable for use in food processing industries. The food industry often opts for steel as it offers exceptional durability, strength, and resistance against corrosion. Food processing equipment, such as mixers, conveyors, grinders, and slicers, can incorporate steel round bars. Moreover, steel round bars are also applicable in the creation of food storage containers, shelves, and racks. Nonetheless, it is crucial to guarantee that the steel employed in food processing industries adheres to food-grade standards, ensuring utmost hygiene and safety.

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