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: What are the advantages of using nickel-manganese alloy steel round bars?: There are several advantages of using nickel-manganese alloy steel round bars in various applications. Firstly, nickel-manganese alloy steel round bars offer excellent strength and toughness. The addition of nickel and manganese enhances the overall strength and durability of the steel, making it suitable for heavy-duty applications that require high strength and resistance to wear and tear. This makes the alloy steel round bars ideal for industries such as construction, automotive, and manufacturing. Secondly, nickel-manganese alloy steel round bars have excellent corrosion resistance properties. The nickel content in the alloy provides exceptional resistance to corrosion, making it suitable for applications in harsh environments or where exposure to corrosive substances is common. This corrosion resistance extends the lifespan of the round bars and reduces the need for frequent maintenance or replacement. Another advantage of using nickel-manganese alloy steel round bars is their excellent heat resistance. The alloy steel can withstand high temperatures without losing its structural integrity, making it suitable for applications that involve exposure to extreme heat or thermal cycles. This heat resistance property makes the round bars ideal for use in industries such as aerospace, power generation, and oil and gas. Furthermore, nickel-manganese alloy steel round bars offer good weldability and machinability. The alloy's composition allows for easy welding and machining, enabling manufacturers to fabricate components or structures with ease. This versatility in processing makes the round bars highly adaptable to different manufacturing processes and requirements. Additionally, nickel-manganese alloy steel round bars have good ductility and formability. The alloy's composition allows it to be easily shaped or formed into various configurations without sacrificing its structural integrity. This formability makes it suitable for applications that require complex shapes or intricate designs. Overall, the advantages of using nickel-manganese alloy steel round bars include excellent strength, corrosion resistance, heat resistance, weldability, machinability, and formability. These properties make the round bars a reliable and versatile choice for a wide range of applications in various industries.

Q: What is the impact strength of a steel round bar?: The ability of a steel round bar to withstand sudden forces or shocks without breaking or fracturing is referred to as its impact strength. This characteristic is a measure of the material's toughness and its ability to resist impact loads. Various factors, including the steel's composition, heat treatment, and any additional alloying elements, influence the impact strength of a steel round bar. To determine the impact strength, testing methods such as the Charpy or Izod impact test are typically employed. These tests involve striking a notched sample of the steel bar with a pendulum and measuring the amount of energy absorbed by the material before it fractures. The results are usually reported in terms of the energy absorbed in joules (J) or foot-pounds (ft-lb). The impact strength of a steel round bar can vary significantly depending on its grade or specification. Different grades of steel possess varying levels of toughness, making some more suitable for applications requiring high impact resistance, such as construction, automotive, or heavy machinery. On the other hand, certain grades may be better suited for less demanding applications. It should be noted that the impact strength is just one of several mechanical properties that must be considered when selecting a steel round bar for a specific application. Other factors, such as tensile strength, yield strength, hardness, and corrosion resistance, should also be taken into account to ensure the optimal performance and durability of the steel round bar in its intended use.

Q: Can steel round bars be used for drive shaft applications?: Yes, steel round bars can be used for drive shaft applications. Drive shafts are responsible for transmitting torque and rotational motion from the engine to the wheels or other components in various mechanical systems such as automobiles, industrial machinery, and even boats. Steel round bars possess excellent mechanical properties, including high strength, durability, and toughness, which are crucial for withstanding the stresses and loads imposed during operation. They also exhibit good fatigue resistance, allowing them to endure repeated loading cycles without failure. Furthermore, steel round bars can be accurately machined to meet the required dimensions and tolerances for drive shaft applications. They can be heat-treated to enhance their strength and hardness or surface treated to improve corrosion resistance if necessary. Overall, steel round bars are a popular choice for drive shaft applications due to their combination of strength, durability, and machinability, making them well-suited for transmitting power efficiently and reliably in various mechanical systems.

Q: Can steel round bars be used for making fasteners?: Yes, steel round bars can be used for making fasteners. Steel round bars are commonly used in the manufacturing of fasteners such as bolts, screws, and rivets. The strength and durability of steel make it an ideal material for fasteners, as it can withstand high levels of stress and provide a secure connection. Additionally, steel round bars can be easily machined and threaded to create the desired shape and size needed for fasteners. Overall, steel round bars are a reliable and commonly used material in the production of fasteners.

Q: Can steel round bars be coated or painted?: Yes, steel round bars can be coated or painted. Coating or painting steel round bars serves several purposes, such as preventing corrosion, enhancing aesthetics, and providing additional protection against environmental factors. Coatings and paints can be applied to steel round bars using various methods, including powder coating, electroplating, or wet paint application. These processes involve preparing the surface of the steel round bar by removing any existing rust or contaminants, followed by the application of the chosen coating or paint. The type of coating or paint used will depend on the specific requirements of the steel round bars, such as the intended use, environmental conditions, and desired appearance. Coating or painting steel round bars can significantly extend their lifespan, improve their visual appeal, and ensure their durability in various applications.

Q: What are the advantages of using nickel-iron alloy steel round bars?: Nickel-iron alloy steel round bars offer several advantages. Firstly, they exhibit excellent corrosion resistance, making them suitable for applications in harsh environments. Additionally, these bars possess high mechanical strength and toughness, allowing them to withstand heavy loads and impacts. They also have good thermal stability, making them ideal for use in high-temperature applications. Moreover, nickel-iron alloy steel round bars have good magnetic properties, making them suitable for use in electromagnetic applications. Overall, the combination of corrosion resistance, mechanical strength, thermal stability, and magnetic properties make nickel-iron alloy steel round bars advantageous in various industrial applications.

Q: Can steel round bars be used for tooling applications?: Tooling applications can indeed utilize steel round bars. Steel, being a highly versatile material, possesses exceptional strength, durability, and resistance to wear and tear. By machining, heat treating, and shaping round bars made of steel, one can create a wide range of tools, including punches, dies, drills, and lathe tools. The round shape of these bars facilitates effortless machining and shaping processes. Moreover, the performance of steel round bars in specific tooling applications can be further enhanced through surface treatments or coatings. All in all, due to their outstanding mechanical properties and adaptability, steel round bars find widespread application in tooling.

Q: Can steel round bars be used in food processing industries?: No, steel round bars are generally not suitable for use in food processing industries as they can corrode and contaminate the food. Stainless steel, on the other hand, is commonly used in such industries due to its corrosion resistance and hygienic properties.

Q: Can steel round bars be used in the food processing industry?: No, steel round bars are not typically used in the food processing industry as they can potentially contaminate the food due to their composition and surface characteristics. Food-grade materials such as stainless steel are preferred for their corrosion resistance and hygienic properties in order to maintain the integrity and safety of the food being processed.