C40 Carbon Steel Round Bars

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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C	Si	Mn	S max	P max	B
0.37-0.44	0.17-0.37	0.35-0.90	0.035	0.035	0.0008-0.003

Yield strength(MPa)	Tensile strength(MPa)	Elongation(%)	Reduction of area(%)	AKV(J)	Hardness(HB)
335	570	219	45	47	217

Sizes detalis	diameter	10-310mm
Sizes detalis	length	3-12m(canbe customerized)
Sizes tolerance	length	+/-100mm(max)
Sizes tolerance	diameter	+/-2mm(max)
Sizes tolerance	Straightness	3mm/m(max)

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:How are steel round bars used in the manufacturing of hydraulic cylinders?: The strength, durability, and versatility of steel round bars make them essential in the production of hydraulic cylinders. These bars are commonly crafted from carbon steel, alloy steel, or stainless steel, all renowned for their high tensile strength and resistance to corrosion. The first step in utilizing steel round bars for hydraulic cylinders involves choosing the correct diameter and length. The bar's diameter determines the overall strength of the cylinder, while the length determines its size and capacity. Once the desired dimensions are established, specialized cutting tools are used to trim the steel round bars to the required length. Next, the steel round bars undergo a series of processes to shape them into the necessary components of a hydraulic cylinder. This entails machining, drilling, and turning operations to create features like threaded ends, grooves, and mounting surfaces. Precision is crucial in executing these processes to ensure the round bars meet the exact specifications of the hydraulic cylinder design. Following the shaping procedures, the steel round bars are subjected to heat treatment to enhance their mechanical properties. Heat treatment involves heating the bars to a specific temperature and rapidly cooling them to achieve the desired hardness, toughness, and dimensional stability. This step is vital in ensuring the hydraulic cylinders can withstand the high pressures and forces they encounter during operation. Once the steel round bars have been shaped and heat-treated, further processing is carried out to achieve the desired surface finish. This can involve grinding, polishing, or coating to improve the bars' appearance and resistance to corrosion. The surface finish is important for ensuring smooth operation and preventing potential leaks or damage to the hydraulic cylinder. Finally, the steel round bars are assembled with other components such as piston rods, cylinder heads, and seals to complete the hydraulic cylinder. Advanced welding or fastening techniques are employed in these assemblies to ensure the components are securely attached and can withstand the forces and pressures exerted during hydraulic operation. In conclusion, the strength, durability, and versatility of steel round bars are indispensable in the manufacturing of hydraulic cylinders. From the initial selection of the appropriate diameter and length to the shaping, heat treatment, and assembly processes, the use of steel round bars guarantees that the hydraulic cylinders can effectively transmit hydraulic power while enduring the demanding conditions they are designed for.

Q:How are steel round bars priced?: Steel round bars are typically priced based on several factors. One of the key factors is the cost of raw materials, which includes the cost of steel billets or ingots used to produce the round bars. The price of these raw materials can fluctuate based on market conditions, such as supply and demand dynamics and changes in input costs. Another factor that influences the pricing of steel round bars is the manufacturing process involved. The cost of transforming raw materials into finished round bars includes expenses such as energy consumption, labor costs, and equipment maintenance. These costs can vary depending on the complexity of the manufacturing process and the efficiency of the production facilities. Market conditions also play a significant role in determining the pricing of steel round bars. Factors such as global economic trends, industry demand, and competition among suppliers can impact the market price. If there is high demand for steel round bars, manufacturers may be able to charge a premium price. Conversely, during periods of oversupply, prices may be lower as suppliers compete for customers. Additionally, the size, grade, and quality of the steel round bars can affect the pricing. Larger diameter bars or specialty grades that require additional processing steps or high-quality raw materials may be priced higher than standard sizes or lower-grade bars. Finally, transportation costs and logistics can also influence the pricing of steel round bars. Shipping distances, freight rates, and any additional handling fees can add to the overall cost of the product. In summary, the pricing of steel round bars is influenced by the cost of raw materials, the manufacturing process, market conditions, the size and grade of the bars, and transportation costs. Understanding these factors can help buyers and sellers negotiate fair prices for steel round bars.

Q:Can steel round bars be used for structural purposes?: Indeed, steel round bars have the capability to serve structural purposes. Due to their robustness and endurance, round bars are frequently employed in construction and engineering ventures. These bars function as weight-bearing elements in edifices, bridges, and other structures, offering essential support and stability. The availability of steel round bars in diverse grades and dimensions permits adaptability in both design and utilization. Moreover, they can be effortlessly welded, molded, and machined to fulfill precise project necessities, rendering them a favored option for structural applications.

Q:What is the difference between a rough turned and a hot rolled steel round bar?: A rough turned steel round bar is a type of steel bar that has been partially machined to remove imperfections and excess material, leaving a rough surface finish. This process helps to refine the dimensions and shape of the bar, making it more accurate and consistent. On the other hand, a hot rolled steel round bar is a type of steel bar that has been heated to high temperatures and then passed through a series of rollers to achieve the desired shape and size. This process results in a smooth surface finish and provides a uniform grain structure, which enhances the strength and durability of the steel. In summary, the main difference between a rough turned and a hot rolled steel round bar lies in the surface finish and manufacturing process used to produce them.

Q:Can steel round bars be used for making pipelines?: Yes, steel round bars can be used for making pipelines. Steel is a widely used material for pipelines due to its strength, durability, and resistance to corrosion. Round bars, which are cylindrical in shape, can be easily fabricated and welded together to form pipelines of various sizes and lengths. The steel round bars used for pipelines are typically made from carbon steel or alloy steel, which have high tensile strength and can withstand high pressure and temperature conditions. Additionally, steel round bars can be coated with protective layers such as epoxy or polyethylene to further enhance their resistance to corrosion. Overall, steel round bars provide a reliable and efficient option for constructing pipelines in various industries such as oil and gas, water supply, and construction.

Q:What are the different types of steel round bars used in the manufacturing of valves and fittings?: Valves and fittings in manufacturing commonly utilize various types of steel round bars. These options include: 1. Carbon Steel Round Bars: Frequently employed in valve and fitting manufacturing, carbon steel round bars possess notable attributes such as strength, durability, and the ability to withstand high temperatures and pressures. 2. Stainless Steel Round Bars: Ideal for valves and fittings that come into contact with liquids or gases, stainless steel round bars exhibit high resistance to corrosion. They are also known for their exceptional strength and mechanical properties. 3. Alloy Steel Round Bars: Alloy steel round bars are created by incorporating alloying elements like chromium, manganese, and nickel into carbon steel. This enhances their strength, hardness, and resistance to wear and tear, making them suitable for demanding valve and fitting applications. 4. Duplex Steel Round Bars: Combining ferrite and austenite phases, duplex steel round bars are a specific type of stainless steel. This unique blend grants them excellent strength, corrosion resistance, and resistance to stress corrosion cracking, making them well-suited for valves and fittings in harsh environments. 5. Nickel Alloy Round Bars: Known for their outstanding resistance to corrosion and high-temperature applications, nickel alloy round bars possess excellent mechanical properties. They are commonly utilized in valves and fittings that handle corrosive fluids or operate in extreme temperatures. When manufacturing valves and fittings, it is crucial to select the appropriate steel round bar based on the specific requirements of the application. Factors to consider include pressure, temperature, fluid compatibility, and environmental conditions.

Q:What are the different types of steel used in round bars?: There are several types of steel commonly used in round bars, including carbon steel, alloy steel, stainless steel, and tool steel.

Q:What are the different alloying elements used in steel round bars?: Steel round bars can be produced using various alloying elements that enhance their properties such as strength, durability, and specific characteristics. Some commonly utilized alloying elements in steel round bars include the following: 1. Carbon: Primarily used, carbon increases the hardness and strength of steel round bars, typically ranging from 0.2% to 2.1% carbon content. 2. Chromium: Added to improve corrosion and oxidation resistance, chromium also enhances hardness, strength, and wear resistance. Stainless steel round bars often contain significant amounts of chromium. 3. Nickel: Commonly found in stainless steel round bars, nickel improves corrosion resistance and mechanical properties, making the steel tougher and stronger. 4. Manganese: Added to enhance hardenability, strength, and wear resistance, manganese also contributes to the steel's ability to withstand impact and shock loading. 5. Molybdenum: Often used to enhance strength, toughness, and corrosion resistance, molybdenum also improves high-temperature strength and creep resistance. 6. Vanadium: Added to improve strength, toughness, and wear resistance, vanadium refines the steel's grain structure, enhancing its mechanical properties. 7. Tungsten: Utilized to increase hardness, strength, and resistance to wear and corrosion, tungsten also improves high-temperature strength and toughness. 8. Silicon: Added to improve strength, hardness, and resistance to oxidation, silicon aids in deoxidizing the steel during manufacturing. 9. Copper: Occasionally used, copper improves corrosion resistance, thermal conductivity, and electrical conductivity in steel. These alloying elements are just a few examples of those that can be used in steel round bars. The specific combination and proportion of these elements depend on the desired properties for the steel and the intended application of the round bars.

Q:How to distinguish a round bar from forging? Cold drawing? Hot rolling?: Hot rolled round steel, used in construction and general hardware parts processing is very common. Cold drawn round steel (do not know is not cold dial round bar). But I understand by the cold dial round bar Also mainly used in hardware parts processing and production. Such as hinge shaft core or other surface and diameter requirements of production and processing occasions.

Q:What is the modulus of elasticity of a steel round bar?: The modulus of elasticity of a steel round bar typically ranges from 190 to 210 gigapascals (GPa).

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