steel round bar

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Specifications of High Quality Round Bar

1. Grade: GB, JIS, ASTM, EN

2. Grade: Q235, SS400, A36, S235JR

3. Diameter and mass: As below

Diameter	Mass	Diameter	Mass	Diameter	Mass
(mm)	(kg/m)	(mm)	(kg/m)	(mm)	(kg/m)
6	0.22	22	2.98	53	17.30
7	0.30	24	3.55	56	19.30
8	0.40	25	3.85	60	22.20
9	0.50	26	4.17	63	24.50
10	0.62	28	4.83	65	26.00
11	0.75	30	5.55	70	30.20
12	0.89	32	6.31	75	34.70
13	1.04	34	7.13	80	39.50
14	1.21	36	7.99	85	44.50
15	1.39	38	8.90	90	49.90
16	1.58	40	9.86	95	55.60
17	1.78	42	10.90	100	61.70
18	2.00	45	12.50	120	88.85
19	2.23	48	14.20	140	120.93
20	2.47	50	15.40	150	138.82

4. Material: Mild Steel

5. Heat treatment of high quality steel:

Fire: Isothermal annealing temperature is 800 ~ 880 °C, with 10 ~ 20 °C, the furnace cooling to about 600 °C, hardness above HB269.

Preheat temperature: 730-730 °C

Quenching temperature: 1190-1210 °C

Tempering temperature: 540-595 °C

Cold drawn, hardness 285 HBS

Cold drawn after annealing condition, hardness 277 HBS

Quenching methods: oil quenching, air cooling or salt bath quenching

Usage and Applications of High Quality Round Bar

1) Suitable for making various strong cutting tool abrasion resistance, impact resistance.

2) Used to produce all kinds of high hard and super hard saw blade, drill, tap, broach, gear hob and various kinds of milling cutter.

3) Used for advanced punching die, screw die, and the toughness and complicated shape of the punch, etc.

4) Is used for cold forging die and drawing mode, etc.

5) Recommended watchcase factory, screw factory and other cold stamping products industry use.

Packaging & Delivery of High Quality Round Bar

Packaging Detail: All goods are packed in bundle with steel strips and shipped by break bulk vessel or container (depend on target market and different ports)

Delivery Detail: 45 days

Trade terms: FOB, CFR, CIF

MOQ: 25 tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.

Weight: The price invoicing on theoretical weight basis or actual weight basis depends on customer’s request.

Shipment: The shipment of bulk break or container is depends on customer’s request and the situation of the port of destination.

Documents given: Full set of original clean on board bill of lading; Original signed commercial invoice; Original packing list; Policy of insurance; Certificate of origin and what the target market needs.

Production Flow of High Quality Round Bar

The common processes are preheated forging quenching, dual refinement solution process, cooling quenching and isothermal quenching. We use heat treatment for dual refinement solution process. The main measures process is high temperature solution and refinement cycle. High temperature solution can improve the carbide morphology and particle size. The aim is to make the loop refinement ultrafine austenite grains.

Q: What are the advantages of using duplex steel round bars?: Duplex steel round bars offer numerous benefits for various applications. Firstly, they provide exceptional resistance to corrosion. By combining chromium, nickel, and molybdenum, this steel can withstand harsh conditions found in marine and chemical industries. This makes it ideal for high exposure to corrosive elements. Secondly, duplex steel round bars possess great strength and toughness. The unique microstructure of this steel, combining ferrite and austenite phases, results in greater strength compared to traditional stainless steels. This makes them suitable for demanding applications requiring high load-bearing capacities. Additionally, duplex steel round bars exhibit excellent fatigue resistance. This makes them perfect for applications subjected to cyclic loading or dynamic stress, such as structural components or machinery parts. Their fatigue resistance allows for extended service life and reliability. Another advantage of using duplex steel round bars is their superior weldability. Their balanced chemical composition and microstructure enable easy fabrication and joining, reducing production time and costs in various industries. Furthermore, duplex steel round bars demonstrate exceptional resistance to stress corrosion cracking (SCC). This makes them a preferred choice for applications with a high risk of SCC, such as offshore and oil and gas industries. Lastly, duplex steel round bars provide cost-effective solutions. Despite their superior properties, they are often more cost-effective than other high-performance materials. Their long service life, reduced maintenance requirements, and overall durability contribute to lower lifecycle costs, making them an economical choice for various applications. In conclusion, duplex steel round bars offer excellent corrosion resistance, high strength and toughness, good fatigue resistance, superior weldability, resistance to stress corrosion cracking, and cost-effectiveness. These properties make them a preferred choice for industries such as oil and gas, chemical processing, marine, and structural applications.

Q: How do you calculate the torsional strength of a steel round bar?: To calculate the torsional strength of a steel round bar, you need to consider its material properties, such as the shear modulus and the cross-sectional area of the bar. The torsional strength can be determined using the formula T = (G * J * tau) / L, where T is the torsional strength, G is the shear modulus, J is the polar moment of inertia, tau is the shear stress, and L is the length of the bar.

Q: Are steel round bars suitable for use in the construction of bridges?: Indeed, steel round bars prove to be a suitable choice for the construction of bridges. Offering a multitude of advantages, they are an ideal option for such projects. To begin with, steel round bars exhibit remarkable tensile strength, enabling them to withstand substantial loads and forces without undergoing deformation or breakage. This attribute holds paramount importance for bridges, as they bear the weight of vehicles and pedestrians. By possessing high tensile strength, steel round bars ensure the structural integrity and safety of the bridge. Furthermore, steel round bars boast exceptional durability and resistance to corrosion. Considering the exposure of bridges to adverse environmental conditions like rain, snow, and saltwater, materials employed in their construction are susceptible to corrosion and deterioration. However, steel round bars are specifically designed to counteract these effects, guaranteeing the longevity and dependability of the bridge. Moreover, steel round bars are widely available in various sizes and lengths, catering to the versatility and adaptability required for different bridge designs and configurations. The uniform circular shape of these bars simplifies the construction process, enabling easy cutting, bending, and welding to meet the necessary specifications. In addition, steel round bars offer cost-effectiveness in bridge construction. Their favorable strength-to-weight ratio allows them to provide the required strength while minimizing the overall weight of the bridge. Consequently, this reduces the amount of material needed and lowers transportation costs during construction. In conclusion, steel round bars are highly suitable for bridge construction due to their high tensile strength, durability, corrosion resistance, versatility, and cost-effectiveness. They deliver the necessary strength and reliability to support heavy loads and withstand adverse environmental conditions, ensuring the safety and durability of the bridge.

Q: How do steel round bars compare to cast iron bars?: Steel round bars are generally considered to be stronger and more durable than cast iron bars. Steel has a higher tensile strength and can withstand greater loads and stress without deforming or breaking. Additionally, steel is more resistant to corrosion and has a higher melting point compared to cast iron. Another advantage of steel round bars is their versatility. Steel can be easily machined, welded, and formed into various shapes, making it suitable for a wide range of applications. Cast iron, on the other hand, is brittle and difficult to work with. It has limited malleability and tends to crack or chip under stress. However, cast iron bars have their own unique properties that make them suitable for specific applications. Cast iron is known for its excellent heat retention and distribution, making it ideal for applications such as cookware and engine blocks. It also has good vibration damping properties, which can be beneficial in certain industrial applications. In summary, while steel round bars are generally considered to be superior in terms of strength, durability, and versatility, cast iron bars have their own specific advantages in certain applications. The choice between the two will ultimately depend on the specific requirements and conditions of the intended use.

Q: What is the maximum vanadium content allowed for steel round bars?: The maximum vanadium content allowed for steel round bars varies depending on the specific steel grade and industry standards. However, in general, the maximum vanadium content is typically around 0.10-0.15%.

Q: What is the difference between a rough turned and a seamless steel round bar?: A rough turned steel round bar refers to a bar that has undergone a preliminary turning process, where excess material is removed to achieve a desired shape or size. On the other hand, a seamless steel round bar is manufactured without any seams or welds, ensuring a smooth and uniform surface throughout the entire length of the bar. Essentially, the difference lies in the manufacturing process and the resulting surface finish.

Q: What are the different types of steel round bars used in the manufacturing of tools?: There are several different types of steel round bars that are commonly used in the manufacturing of tools. Each type of steel has its own unique properties and characteristics that make it suitable for different applications. Here are some of the most common types of steel round bars used in tool manufacturing: 1. Carbon Steel Round Bars: These are the most commonly used type of steel round bars in tool manufacturing. They are known for their high strength and durability, making them ideal for heavy-duty applications. Carbon steel round bars can be further classified into low carbon, medium carbon, and high carbon steel, depending on the amount of carbon content present. 2. Alloy Steel Round Bars: Alloy steel round bars are made by adding various alloying elements such as manganese, chromium, nickel, or molybdenum to carbon steel. This results in enhanced strength, hardness, and resistance to wear and tear. Alloy steel round bars are commonly used in the manufacturing of cutting tools, drills, and gears. 3. Stainless Steel Round Bars: Stainless steel round bars are known for their corrosion resistance and high tensile strength. They are commonly used in the manufacturing of tools that require resistance to rust, such as kitchen knives, surgical instruments, and automotive components. 4. Tool Steel Round Bars: Tool steel round bars are specifically designed to be used in the manufacturing of tools, hence the name. They have high hardness, wear resistance, and toughness, making them ideal for applications such as cutting, drilling, and shaping. Tool steel round bars can be further classified into several types based on their specific properties, such as high-speed steel (HSS), cold work steel, hot work steel, and shock-resistant steel. 5. Stainless Tool Steel Round Bars: Stainless tool steel round bars combine the characteristics of stainless steel and tool steel. They offer good resistance to corrosion and wear, making them suitable for applications where both properties are required, such as in the manufacturing of molds and dies. These are just a few examples of the different types of steel round bars used in tool manufacturing. The choice of steel depends on the specific requirements of the tool and the application it will be used for.

Q: Can steel round bars be used in the manufacturing of pumps?: Yes, steel round bars can be used in the manufacturing of pumps. Steel round bars are commonly used in various industries for their strength, durability, and versatility. In pump manufacturing, steel round bars are often used as shafts or rotors due to their ability to withstand high pressure and rotational forces. The steel round bars can be machined, forged, or heat-treated to meet the specific requirements of the pump design. Additionally, steel round bars provide excellent corrosion resistance, making them suitable for pumps used in various environments. Overall, steel round bars are a reliable and commonly used material in pump manufacturing.

Q: Can steel round bars be used for making fencing?: Indeed, fencing can be made using steel round bars. In the construction industry, steel round bars find wide usage for diverse purposes, one of which is fencing. Thanks to its robustness and durability, steel proves to be an appropriate material for creating a strong and enduring enclosure. By welding or bolting steel round bars together, various fencing designs and configurations can be effortlessly formed. Moreover, steel can be galvanized or coated to augment its resistance against corrosion, rendering it suitable for outdoor fencing purposes. All in all, steel round bars are a versatile and dependable option for constructing fencing structures.

Q: What are the different types of steel round bar alloys?: Some of the different types of steel round bar alloys include carbon steel, alloy steel, stainless steel, tool steel, and high-speed steel.

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