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: How many roots are there in a standard ton of steel and how many meters are there in a steel bar?: See more big steel bar, there is theoretical weight. After all, rebar is threaded, and round steel is also used.

Q: What is the difference between 40Cr round steel and 40Cr forging parts?: The utility model has the advantages of high strength and good plasticity, and is suitable for making important parts with large force and high requirement.The properties of forgings are superior to those of ordinary ones.

Q: What are the different surface finishes available for steel round bars?: There are several surface finishes available for steel round bars, each offering unique properties and applications. Some of the common surface finishes include: 1. Hot Rolled: This is the most basic surface finish, achieved by heating the steel above its recrystallization temperature and then allowing it to cool. It provides a rough and scaled surface, ideal for applications that do not require a high level of aesthetics. 2. Cold Drawn: In this process, the steel round bar is pulled through a die at room temperature, resulting in a smooth and polished surface. Cold drawn surface finish offers improved dimensional accuracy and tighter tolerances, making it suitable for applications that require precision and a visually appealing appearance. 3. Turned and Polished: Steel round bars can be turned on a lathe machine to achieve a smooth and shiny surface finish. This process removes any imperfections and irregularities, providing a close tolerance and highly finished surface. Turned and polished bars are often used in applications where a high level of surface finish and dimensional accuracy is required, such as in the manufacturing of shafts and precision components. 4. Ground: Steel round bars can be ground to remove any surface defects or irregularities. Grinding produces a highly accurate and smooth surface finish, making it suitable for applications that require close tolerances and a superior surface finish. Ground bars are commonly used in the manufacturing of bearings, gears, and other high-precision components. 5. Coated: Steel round bars can also be coated with various materials to enhance their performance and protect them from corrosion. Common coating options include zinc, chrome, and nickel. Coated bars offer improved durability, resistance to corrosion, and enhanced aesthetic appeal. The choice of surface finish for steel round bars depends on the specific requirements of the application, such as dimensional accuracy, surface quality, corrosion resistance, and aesthetic appeal.

Q: Can steel round bars be used for making shock absorber components?: Yes, steel round bars can be used for making shock absorber components. Steel is a common material choice for shock absorber components due to its strength, durability, and ability to withstand high levels of stress and impact. The round shape of the bars also allows for easy machining and fabrication of the necessary components.

Q: Are steel round bars suitable for agricultural applications?: Yes, steel round bars are suitable for agricultural applications. Steel is a strong and durable material that can withstand the harsh conditions often found in agricultural settings. Steel round bars can be used for various purposes in agriculture, such as constructing fences, gates, and animal enclosures. They are also commonly used for building structures like barns and storage sheds. Additionally, steel round bars can be used as support beams or posts for agricultural machinery and equipment. The versatility and strength of steel make it a reliable choice for agricultural applications.

Q: What is the maximum carbon content allowed for steel round bars?: The maximum carbon content allowed for steel round bars typically ranges from 0.25% to 0.30%.

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: Why is round steel more expensive than thread steel?: Thread steel is generally used for building convenience. Round steel is widely used in industrial manufacturing and processing. And, as mentioned above, there are many kinds of round steel materials, and there is not much comparability between the prices.

Q: Excuse me, the difference between round steel, screw steel, steel, plate material, steel wire, hope professional answer: Anything you say can be called steel bar, except steel wire. Round and round is a name, and wire coil, general line.

Q: How many tons of pressure can the round steel of 70 inches bear?: As the diameter of about 11.5 cm diameter 180 cm long in the middle of the force which kind of force will be smaller if the curvature is hollow capability hollow wall thickness to achieve much greater strength than to solid

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