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: What are the different types of steel round bar alloys for improved strength?: There are several different types of steel round bar alloys that are known for their improved strength. These alloys are developed through the addition of various elements to the steel composition, resulting in different properties and strengths. One commonly used alloy for improved strength is carbon steel. This alloy contains a higher carbon content, which enhances its strength and hardness. Carbon steel round bars are widely used in applications that require high strength, such as construction, automotive, and machinery. Another type of alloy is stainless steel, which is known for its corrosion resistance and high strength. Stainless steel round bars are often used in environments where corrosion is a concern, such as marine applications, food processing, and chemical plants. Alloy steel is another category that offers improved strength. This type of steel is created by adding elements such as chromium, molybdenum, and nickel to the composition. Alloy steel round bars are commonly used in industries that require high strength and durability, such as aerospace, oil and gas, and power generation. Tool steel is yet another alloy that provides enhanced strength and toughness. Tool steel round bars are specifically designed for machining and cutting applications, where high wear resistance and hardness are crucial. Lastly, there are specialty alloys such as nickel alloy and titanium alloy round bars, which offer exceptional strength and unique properties for specific applications. Nickel alloy round bars are often used in industries such as aerospace, chemical, and nuclear, while titanium alloy round bars are commonly found in aerospace, medical, and automotive industries. In conclusion, the different types of steel round bar alloys for improved strength include carbon steel, stainless steel, alloy steel, tool steel, and specialty alloys. Each of these alloys has its own unique properties and applications, providing a wide range of options for industries that require high strength materials.

Q: What is the yield strength of a steel round bar?: When considering the design or selection of materials for structural applications, it is crucial to take into account the yield strength of a steel round bar. The yield strength refers to the stress or force that the bar can withstand before it undergoes deformation or permanent shape change. The specific grade or type of steel being utilized can cause variations in the yield strength. For instance, common grades like A36, 1018, and 4140 typically exhibit yield strengths ranging from 36,000 psi to 100,000 psi. However, it is important to bear in mind that factors such as heat treatment, manufacturing processes, and the presence of alloying elements in the steel composition can also impact the yield strength. Therefore, it is highly recommended to consult the material specifications or conduct thorough testing to accurately determine the yield strength of a steel round bar for a given application.

Q: Difference between round bar and other steel bars: Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter.

Q: How do steel round bars differ from steel square bars?: Steel round bars and steel square bars differ in their shape and cross-sectional design. While round bars possess a circular shape throughout their length, square bars have a square shape. This distinction affects their mechanical properties and applications. Round bars offer enhanced tensile strength and are often used in applications where rotational motion or bending is required, such as in construction, machining, and transportation industries. On the other hand, square bars provide more stability and structural support due to their flat sides, making them suitable for applications requiring load-bearing capabilities, like supports, frames, and braces. Ultimately, the choice between round bars and square bars depends on the specific requirements and intended use of the steel.

Q: How do I determine the load capacity of a steel round bar?: To determine the load capacity of a steel round bar, you need to consider its diameter, length, and the type of steel being used. The load capacity can be determined using formulas or tables provided by engineering handbooks or consult a structural engineer who can perform calculations based on the specific properties of the steel bar.

Q: Can steel round bars be bent or formed?: Yes, steel round bars can be bent or formed. They have the ability to be shaped into various angles or curves through the application of force, typically using tools such as a hydraulic press or bending machine.

Q: Are steel round bars susceptible to corrosion?: Yes, steel round bars are susceptible to corrosion.

Q: Why do I use the M25 round bar for the embedded bolt M24?: The problem is that the reinforcement of this 36 is not ordinary steel. This steel bar is called general round bar, and its diameter is 36.2MM. Its concentricity is very high, it is a kind of reinforcing steel that is specially designed for bolt

Q: Can steel round bars be used in the production of agricultural machinery?: Yes, steel round bars can be used in the production of agricultural machinery. Steel is a durable and strong material that is commonly used in various industries, including agriculture. Steel round bars can be utilized for manufacturing components such as axles, shafts, and frames, providing stability and strength to agricultural machinery.

Q: What are the different surface treatments for steel round bars?: There are several different surface treatments available for steel round bars, each serving a specific purpose and providing unique benefits. Some of the most common surface treatments for steel round bars include: 1. Hot-dip galvanizing: This process involves immersing the steel round bars in a bath of molten zinc, which creates a protective coating that helps prevent corrosion and rusting. Hot-dip galvanizing is an effective treatment for steel round bars used in outdoor or corrosive environments. 2. Painting: Applying a coat of paint to the surface of steel round bars not only enhances their appearance but also provides a protective barrier against moisture and oxidation. Painting is commonly used for decorative purposes or when a specific color is desired. 3. Powder coating: Powder coating involves applying a dry powder to the steel round bars, which is then cured under heat to form a durable and attractive finish. This treatment offers excellent resistance to impact, chemicals, and UV rays, making it suitable for various applications. 4. Electropolishing: This process uses an electric current and an electrolyte solution to remove a thin layer of the steel round bars' surface, resulting in a smooth and shiny finish. Electropolishing improves the appearance and corrosion resistance of the steel, making it ideal for applications that require a high level of cleanliness and aesthetics. 5. Passivation: Passivation involves treating the steel round bars with an acid solution to remove any free iron or iron oxide from the surface, thus enhancing their corrosion resistance. Passivation is commonly used for stainless steel round bars to increase their longevity and prevent staining or rusting. 6. Shot blasting: Shot blasting is a mechanical surface treatment that involves bombarding the steel round bars with small steel balls or particles at high velocity. This process removes any surface contaminants, scale, or rust, resulting in a clean and roughened surface that improves adhesion for subsequent coatings or treatments. 7. Chrome plating: Chrome plating is a technique where a thin layer of chromium is electroplated onto the surface of steel round bars. This treatment provides excellent corrosion resistance, wear resistance, and a shiny appearance, making it suitable for applications that require durability and aesthetics. Overall, the choice of surface treatment for steel round bars depends on the specific requirements of the application, such as corrosion resistance, aesthetics, or wear resistance. It is important to carefully consider the intended use and environmental conditions before selecting the most appropriate surface treatment for steel round bars.

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