High Strength Steel Round Bar 4140 Round Bar Steel

High Strength Steel Round Bar 4140 Round Bar Steel System 1

High Strength Steel Round Bar 4140 Round Bar Steel System 2

High Strength Steel Round Bar 4140 Round Bar Steel System 3

High Strength Steel Round Bar 4140 Round Bar Steel System 4

High Strength Steel Round Bar 4140 Round Bar Steel

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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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1,Size of 4140 Carbon Alloy Steel
Round bar	Diameter(mm)	Length (mm)
20~800	3000~9000
Plate	Thickness(mm)	Width (mm)	Length (mm)
Max:800	Max:2200	Max:9000
The specification can be customized.
2,Chemical Compositons
Grade	C	Si	Mn	P	S	Cr	Mo	Ni
42CrMo	0.38~0.45	0.17~0.37	0.50~0.8	≤0.035	≤0.035	0.9~1.2	0.15-0.25	≤0.3
4140	0.40~0.45	0.15~0.35	0.75~1.0	≤0.035	≤0.040	0.8~1.1	0.15-0.25	-
SCM44	0.38~0.43	0.15~0.35	0.60~0.9	≤0.030	≤0.030	0.9~1.2	0.15-0.30	≤0.25
1.7225	0.38~0.45	≤0.40	0.60~0.9	≤0.025	≤0.035	0.9~1.2	0.15-0.30
3,Features of 4140 alloy steel
1, Chromium molybdenum alloy steel
2, Slightly higher carbon content then 4130
3, Greater strength and heat treatment
4,Typical Applications
1, Applications in the oil and gas sector
2, Connection rods, collets, conveyor pins,
3, Gears, stem assemblies,
4, Pump shafts and tool holders

Alloy Steel	5140,5115,5120,5130,5145,4118,4130,4135,6150,5115,4142,4130,4118,6150,4140,4720,4320 ,E9310,8620,4340
Tool Steel	H13,1.2344,SKD61,D2,SKD11,1.2379,1.2510,01,SKS3,95MnWCr5,D3,SKD1,1.2419, SKS31,H21,SKD5,1.2581,P20,35CrMo7,1.2738,1.2316,M2
Bearing Steel	GCr15,52100,SUJ1,SUJ2,100Cr6,1.2067,55C,8620,4320,9310,440C,M50
Spring Steel	9260,SUP6,SUP7,1.7108,54SiCr6,1.7102,5155,SUP9,1.7176,5160,1.7177,6150, SUP10,51CrV4,1.8159
Stainless Steel	321,sus321,1.4541,304,SUS304,1.4301,410,SUS410,1.4006,420,1.4021,1.4028, 434,1.4113,316L,SUS316L,1.4435,630,1.4542,431,1.4057,201,202,301

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 do you prevent steel round bars from rusting during storage?: To prevent steel round bars from rusting during storage, there are several measures you can take: 1. Keep the round bars in a dry environment: Moisture is one of the main causes of rust. Ensure that the storage area is dry, free from any leaks or humidity. Consider using dehumidifiers or moisture-absorbing products to maintain the dryness. 2. Apply a rust inhibitor: Coating the steel round bars with a rust inhibitor can provide a protective layer against moisture and oxygen, preventing rust formation. Rust inhibitors are available in various forms, such as sprays, oils, or waxes. Apply the inhibitor following the manufacturer's instructions. 3. Store in a climate-controlled area: Extreme temperature fluctuations can cause condensation, leading to rust formation. Storing the round bars in a climate-controlled area with a consistent temperature can minimize the risk of rusting. 4. Properly package the round bars: Use appropriate packaging materials to protect the steel round bars from direct contact with moisture or other contaminants. Consider wrapping them in plastic or using moisture-resistant packaging materials. 5. Regularly inspect and maintain: Periodically inspect the stored round bars for any signs of rust or damage. If any rust spots are detected, promptly clean and reapply a rust inhibitor to prevent further corrosion. Remember, prevention is key when it comes to avoiding rust on steel round bars during storage. By implementing these measures, you can significantly reduce the risk of rust formation and maintain the quality of the round bars.

Q:What is the difference between strip steel and round steel? Where are they mainly used?: Difference between round bar and other steel bars:(1), is not the same, round shape light round, no pattern without ribs, other steel surface appearance is engraved or ribbed, cohesive force that cause steel and concrete, and the bond strength of steel and concrete in the other.(2) the composition is different. Round steel (grade a steel) belongs to ordinary low carbon steel, and most other steel bars are alloy steel.(3), the strength is not the same, low strength steel, and other steel with high strength, the diameter of the same size as compared with other steel, round steel can bear the pulling force than other reinforced small, but the plastic steel reinforced bar is stronger than the other, there is a large deformation in the break before, while the other bars in the break before the deformation is much smaller.

Q:Are steel round bars suitable for use in the manufacturing of valves?: Yes, steel round bars are suitable for use in the manufacturing of valves. Steel round bars offer excellent strength, durability, and corrosion resistance, making them ideal for various applications including valve production. Additionally, steel round bars can be easily machined and fabricated into different shapes and sizes, allowing for customization according to specific valve requirements.

Q:Can steel round bars be used for making tie rods?: Yes, steel round bars can be used for making tie rods. Steel round bars are commonly used in construction and engineering applications due to their strength and durability. Tie rods are used to provide structural support and stability, and steel round bars are well-suited for this purpose. They have high tensile strength and can withstand heavy loads and tension, making them an ideal choice for tie rods. Additionally, steel round bars can be easily fabricated and welded, allowing for customization and versatility in the design and construction of tie rods.

Q:Can steel round bars be used for making handrails?: Yes, steel round bars can be used for making handrails. Steel round bars are commonly used in construction and fabrication due to their strength and durability. They can be easily shaped and welded to create handrails that provide support and safety for staircases, balconies, and other elevated areas. Additionally, steel round bars can be finished with various coatings or treatments to enhance their corrosion resistance and aesthetics. Overall, steel round bars are a popular choice for making handrails due to their strength, versatility, and ability to withstand heavy usage.

Q:Can steel round bars be annealed?: Yes, steel round bars can be annealed. Annealing is a heat treatment process that involves heating the steel to a specific temperature and then gradually cooling it, which helps to relieve internal stress, improve ductility, and enhance the material's machinability.

Q:What are the advantages of using nickel-molybdenum-chromium alloy steel round bars?: The advantages of using nickel-molybdenum-chromium alloy steel round bars include excellent corrosion resistance, high strength and toughness, good weldability, and the ability to withstand extreme temperatures and pressures. These properties make the alloy steel round bars suitable for various applications in industries such as oil and gas, aerospace, and chemical processing, where durability and reliability are essential.

Q:How do you store steel round bars to prevent damage?: To store steel round bars and prevent damage, there are several important steps to follow. Firstly, it is crucial to keep the bars in a dry and well-ventilated area to avoid moisture buildup, which can lead to rusting. Moisture can also cause the bars to become brittle and weaken over time. Next, it is advisable to store the round bars horizontally rather than vertically. This prevents warping or bending due to the weight of the bars pressing down on each other. If vertical storage is necessary, it is essential to use appropriate racks or supports that evenly distribute the weight. It is also important to avoid stacking the bars too high, as excessive weight can cause deformation or collapse. If stacking is unavoidable, ensure sturdy supports are used and the weight is evenly distributed across the stack. Additionally, it is advisable to separate different sizes or types of steel round bars to prevent scratching or damage. This can be achieved by using separators or dividers to create distinct compartments for each type of bar. Lastly, regularly inspect the stored round bars for any signs of rust, corrosion, or damage. If any issues are detected, take necessary measures to address them promptly. This may involve applying rust inhibitors, cleaning the bars, or contacting professionals for further assistance. By following these storage guidelines, you can effectively protect steel round bars from damage and ensure their longevity and quality.

Q:What are the advantages of using nickel-chromium-manganese alloy steel round bars?: The advantages of using nickel-chromium-manganese alloy steel round bars include their excellent strength and durability, high resistance to corrosion and oxidation, good machinability, and the ability to withstand high temperatures and pressures. Additionally, this alloy offers good weldability and can be easily formed into various shapes and sizes, making it suitable for a wide range of applications in industries such as aerospace, automotive, and construction.

Q:How do you calculate the weight of a steel round bar based on its length and volume?: In order to determine the weight of a steel round bar based on its length and volume, it is necessary to have knowledge of the steel's density. The density denotes the mass per unit volume of the material. The weight can be calculated using the following formula: Weight = Volume × Density To begin, one must calculate the volume of the steel round bar. The volume of a cylinder, which is the shape of a round bar, can be determined using the following formula: Volume = π × (Radius)^2 × Length The value of π is a mathematical constant approximately equal to 3.14, and Radius represents the radius of the round bar. Once the volume is obtained, it can be multiplied by the density of the steel to find the weight. It is important to note that the density of steel may vary depending on the specific type being used. For instance, mild steel has a density of approximately 7850 kg/m³. Therefore, the weight of the steel round bar can be calculated as: Weight = Volume × Density For example, let us consider a steel round bar with a length of 1 meter and a radius of 0.5 meters. To calculate the weight, we first need to determine the volume: Volume = π × (0.5)^2 × 1 Volume = 0.7854 m³ Next, we multiply the volume by the density of steel: Weight = 0.7854 m³ × 7850 kg/m³ Weight = 6171.79 kg Hence, the weight of the steel round bar would be approximately 6171.79 kg.

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