mild 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: Can steel round bars be used for making gears or sprockets?: Yes, steel round bars can be used for making gears or sprockets. Steel is a commonly used material for gears and sprockets due to its strength, durability, and ability to withstand high loads and friction. The round bars can be machined or shaped into the desired gear or sprocket design, providing a reliable and efficient solution for various applications.

Q: How do you cut steel round bars?: To cut steel round bars, one can utilize various methods based on specific requirements and available tools. Here are a few commonly employed techniques: 1. Abrasive Cutting: By using a handheld angle grinder or chop saw equipped with an abrasive cutting wheel or disc, a groove is created on the surface of the round bar. Applying pressure and rotating the bar gradually allows the cutting wheel to slice through the steel. 2. Cold Saw: This specialized machine operates with a circular blade at a low speed, minimizing heat generation. The round bar is firmly clamped, and the cold saw's blade is lowered onto it to achieve precise cuts. 3. Band Saw: Another commonly used machine for steel round bar cutting, the band saw features a rotating toothed metal band that moves on two pulleys. The round bar is secured in a vise, and the band saw is adjusted to the desired angle and speed. The bar is then fed into the blade, resulting in smooth cuts. 4. Torch Cutting: For thicker steel round bars, oxy-fuel torch cutting is suitable. This method involves using a torch that combines oxygen and fuel gas, like acetylene, to produce a high-temperature flame. The round bar is heated until it becomes molten, and then a separate stream of oxygen is directed onto the heated area, causing rapid oxidation and enabling a cut. Irrespective of the chosen method, it is crucial to adhere to proper safety measures, including wearing protective goggles and gloves, and ensuring a stable work surface. Furthermore, using the appropriate cutting tools and techniques for the specific type of steel being cut is vital to achieve clean and precise results.

Q: What are the advantages of using high-speed steel round bars?: High-speed steel (HSS) round bars have several advantages. Firstly, they offer excellent hardness, allowing them to withstand high temperatures and wear. This makes them suitable for cutting tools and machine parts that undergo intense friction and heat. Additionally, HSS round bars have superior toughness, enabling them to resist chipping and breaking during heavy-duty applications. Furthermore, their high thermal conductivity helps dissipate heat efficiently, preventing damage to the material being worked on and prolonging tool life. Lastly, HSS round bars have good dimensional stability, ensuring accurate and precise machining results.

Q: Can steel round bars be used for shafting applications?: Yes, steel round bars can be used for shafting applications. Steel round bars are commonly used in various industries for shafting purposes due to their high strength, durability, and ability to withstand rotational forces. They provide excellent stability and support for transmitting power or motion in a wide range of applications, such as machinery, automotive, construction, and manufacturing.

Q: Are steel round bars susceptible to rust?: Yes, steel round bars are susceptible to rust if they are not properly protected or coated.

Q: Can steel round bars be used in the manufacturing of lighting fixtures?: Yes, steel round bars can be used in the manufacturing of lighting fixtures. Steel is a versatile material that offers strength, durability, and a sleek appearance, making it suitable for various applications, including lighting fixtures. Steel round bars can be shaped, cut, and welded to create different components of lighting fixtures, such as frames, bases, or decorative elements. Additionally, steel can be finished with various coatings or finishes to enhance its aesthetic appeal and protect it from corrosion.

Q: What are the different specifications for steel round bars?: The different specifications for steel round bars typically include the diameter, length, and grade of the steel. Other specifications may include the tolerance levels for diameter and length, as well as any specific requirements for surface finish or heat treatment.

Q: Can steel round bars be used in the production of packaging equipment?: Steel round bars are indeed a versatile option for the production of packaging equipment. Their exceptional strength and durability make them highly favored in various industries. When it comes to packaging equipment, these round bars serve multiple purposes, such as offering structural support, reinforcement, or acting as components in the machinery's moving parts. The steel's impressive hardness and resistance to wear and tear make it ideal for handling heavy loads and ensuring uninterrupted operation. Moreover, steel round bars can be easily machined, welded, or modified to precisely meet the specific requirements of the packaging equipment. All in all, steel round bars are a dependable and widely utilized material in the manufacturing of packaging equipment.

Q: What is the difference between a turned and a polished steel round bar?: A turned steel round bar and a polished steel round bar both undergo separate processes that result in different surface finishes and properties. A turned steel round bar is typically created by using a lathe machine to remove material from the surface of a steel bar. This process involves rotating the bar against a cutting tool, which cuts away the outer layer and leaves behind a smooth and cylindrical surface. The turned bar may have visible machining marks due to the cutting process, although it is generally considered to have a more precise and uniform diameter compared to other types of steel bars. Turned bars are often used in applications where dimensional accuracy is crucial, such as in machinery or tooling. On the other hand, a polished steel round bar undergoes a different process that involves grinding or buffing the surface to achieve a smooth and reflective finish. Polishing removes any imperfections or roughness from the surface of the steel bar, resulting in a highly lustrous appearance. Polished bars are often used in decorative applications or where visual aesthetics are important, such as in architectural designs or high-end consumer products. In summary, the main difference between a turned and a polished steel round bar lies in their respective manufacturing processes and resulting surface finishes. A turned bar is machined to achieve precise dimensions, while a polished bar is subjected to a polishing process to obtain a smooth and reflective surface. The choice between the two depends on the specific requirements of the application, with turned bars being preferred for dimensional accuracy and polished bars for aesthetic appeal.

Q: Can steel round bars be used for making cooling system components?: Certainly, cooling system components can be fabricated using steel round bars. Steel, being a versatile and resilient material, possesses the capability to endure elevated temperatures and pressures, rendering it ideal for cooling system applications. Steel round bars can be precisely shaped and dimensioned to meet the varying requirements of distinct cooling system components such as pipes, fittings, valves, and heat exchangers. Furthermore, steel exhibits exceptional thermal conductivity, enabling efficient heat transfer within cooling systems. However, it is vital to meticulously consider the specific demands of the cooling system and seek advice from engineers or professionals to ascertain the appropriate grade of steel and ensure compatibility with other system components.

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