Alloy Steel AISI 4340 Materials 1.6582 System 1

Alloy Steel AISI 4340 Materials 1.6582 System 2

Alloy Steel AISI 4340 Materials 1.6582 System 3

Alloy Steel AISI 4340 Materials 1.6582 System 4

Alloy Steel AISI 4340 Materials 1.6582

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 50 m.t.

Supply Capability:: 10000 m.t./month

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GB	ASTM	JIS	ISO
40CrNiMoA	4340	SNCM439	36CrNiMo4

Standard	Grade	C	Cr	Ni	Mo	Si	Mn	P	S	Cu
≤
GB	5CrNiMo	0.37-0.44	0.60-0.90	1.25-1.35	0.15-0.25	0.17-0.37	0.50-0.80	0.025	0.025	0.30
JIS	SNCM439	0.36-0.43	0.60-1.00	1.60-2.00	0.15-0.30	0.15-0.35	0.60-0.90	0.030	0.020	0.30
ASTM	4340	0.38-0.43	0.70-0.90	1.65-2.00	0.20-0.30	0.15-0.35	0.65-0.85	0.025	0.025	—
ISO	38CrNiMo4	0.32-0.40	0.90-1.20	0.90-1.20	0.15-0.30	0.10-0.40	0.50-0.80	0.035	0.035	—

Tensile strength	Yield strength	Elongation rate	Contractibility rate	Impact Energy	Hardness(HBS100/3000)
≥980MPa	≥835MPa	≥12%	≥55%	≥78J	≤269

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:What are the disadvantages of using steel round bars?: There are several disadvantages of using steel round bars in certain applications. Firstly, steel round bars are relatively heavy compared to other materials such as aluminum or plastic. This can be a disadvantage when considering weight restrictions or when ease of transportation is important. Secondly, steel round bars are susceptible to corrosion, especially in environments with high moisture, humidity, or exposure to certain chemicals. This can lead to the degradation of the material over time, reducing its strength and durability. To mitigate this issue, additional precautions such as coatings or regular maintenance may be required, adding to the overall cost and effort. Furthermore, steel round bars may not be suitable for applications where electrical conductivity is a concern. Steel is a good conductor of electricity, which can be a disadvantage in situations where electrical insulation is necessary. Lastly, steel round bars may not be as aesthetically pleasing as materials like wood or decorative metals. While this may not be a significant disadvantage in certain applications, it can be a drawback in situations where the visual appearance is important, such as architectural or interior design projects. Overall, while steel round bars are widely used and offer numerous advantages such as high strength and durability, it is important to consider these disadvantages in specific applications to ensure the optimal choice of materials.

Q:Can steel round bars be plated with other metals?: Yes, steel round bars can be plated with other metals. Plating is a process in which a thin layer of one metal is applied to the surface of another metal. This is commonly done to enhance the appearance of the steel round bar or to provide it with additional properties such as corrosion resistance or improved conductivity. The plating process involves immersing the steel round bar in a solution that contains ions of the desired metal. Through the use of electrical currents or chemical reactions, the metal ions are deposited onto the surface of the steel, forming a thin and uniform coating. Popular metals used for plating steel round bars include nickel, chrome, zinc, and copper. Plating is a versatile and cost-effective method to improve the performance and aesthetics of steel round bars for various applications.

Q:How do steel round bars compare to other materials in terms of strength?: Steel round bars are known for their exceptional strength compared to other materials. Steel has a high tensile strength, which means it can withstand heavy loads and resist deformation. In comparison to materials like aluminum or plastic, steel round bars offer superior strength and durability, making them ideal for applications that require structural integrity and stability.

Q:How are steel round bars used in the manufacturing of agricultural machinery?: Steel round bars are commonly used in the manufacturing of agricultural machinery as they provide strength, durability, and flexibility. These bars are often used to construct various components such as axles, shafts, and pins, which play a crucial role in supporting and transmitting power within the machinery. The high tensile strength of steel round bars allows them to handle heavy loads and withstand harsh operating conditions, ensuring the reliability and longevity of the agricultural equipment.

Q:Can steel round bars be used for shafts or axles?: Yes, steel round bars can be used for shafts or axles. Steel round bars are commonly used in various industries, including automotive, machinery, and construction, for their strength, durability, and versatility. They are often chosen for shafts or axles due to their ability to withstand heavy loads, provide reliable support, and resist wear and tear. Steel round bars can be machined and heat-treated to meet specific requirements, making them suitable for use as shafts or axles in various applications where strength and reliability are crucial, such as in vehicles, industrial equipment, and rotating machinery.

Q:What are the different types of steel round bar surface treatments used in the aerospace industry?: In the aerospace industry, the different types of steel round bar surface treatments commonly used include various coatings such as nickel plating, chrome plating, zinc plating, and anodizing. These treatments are applied to enhance the corrosion resistance, improve the durability, and provide a visually appealing finish to the steel round bars used in aerospace applications.

Q:Can steel round bars be used in the agriculture industry?: Steel round bars find extensive use in the agriculture industry, where they serve a multitude of purposes. Commonly employed in the construction of farm equipment, fencing, and building structures, steel round bars are renowned for their robustness and longevity, rendering them ideal for demanding tasks within the agricultural sector. Moreover, these bars exhibit exceptional resistance to harsh weather conditions and corrosion, thereby ensuring their enduring reliability and durability in agricultural settings. In essence, steel round bars emerge as a versatile and pragmatic option for the agriculture industry, owing to their immense strength, durability, and ability to withstand environmental factors.

Q:What are the different surface roughness options for steel round bars?: The different surface roughness options for steel round bars can vary depending on the manufacturing process and specific requirements. Some common surface finishes for steel round bars include smooth, turned and polished, ground, and rough. These options provide different levels of smoothness and surface texture to meet various industrial and aesthetic needs.

Q:What are the different types of steel round bars used in the automotive braking systems?: There are several different types of steel round bars that are commonly used in automotive braking systems. These types of steel are specifically chosen for their strength, durability, and ability to withstand the high temperatures and pressures that are generated during braking. One commonly used type of steel round bar is carbon steel. This type of steel is known for its high strength and excellent hardness. Carbon steel round bars are often used in the manufacturing of brake rotors and brake drums. They are able to withstand the friction and heat generated during braking, ensuring reliable performance and longevity. Another type of steel round bar used in automotive braking systems is stainless steel. Stainless steel is highly resistant to corrosion and rust, making it ideal for brake lines and fittings. It also has good heat resistance properties, allowing it to withstand the thermal stresses generated during braking. Some automotive braking systems also utilize alloy steel round bars. Alloy steel is a combination of different metals, such as chromium, nickel, and molybdenum, which enhance its mechanical properties. Alloy steel round bars are known for their high tensile strength and toughness, making them suitable for applications that require a high level of performance and durability. In addition to these commonly used types of steel round bars, there are also specialized types that are designed for specific applications within automotive braking systems. For example, heat-treated steel round bars are used in the manufacturing of brake calipers and pistons, as they can withstand the extreme temperatures generated by the friction between the brake pads and rotors. Overall, the choice of steel round bar in automotive braking systems depends on the specific requirements of the application, such as strength, durability, heat resistance, and corrosion resistance. By selecting the appropriate type of steel, automotive manufacturers can ensure the safety and reliability of their braking systems.

Q:What are the different grades of heat-treated steel round bars?: There exists a variety of heat-treated steel round bars with distinct properties and characteristics. Among the commonly used grades are: 1. 4140: Renowned for its high strength and toughness, this grade of heat-treated steel round bar possesses exceptional wear resistance and good machinability. It can undergo easy heat treatment to enhance its hardness and strength. 2. 4340: Heat-treated steel round bars belonging to this grade are recognized for their high tensile strength, toughness, and resistance to fatigue. They find extensive use in industries like aerospace and automotive, which demand superior strength and durability. 3. 8620: Characterized by its case hardening properties, this grade of heat-treated steel round bar exhibits good core strength, excellent toughness, and is frequently employed in applications requiring high wear resistance, such as gears, shafts, and pins. 4. 52100: Widely utilized in bearing applications, heat-treated steel round bars of this grade offer exceptional hardness, wear resistance, and high fatigue strength. They are specially designed to withstand heavy loads and provide long-lasting performance. 5. 1045: Recognized for its medium carbon content, this grade of heat-treated steel round bar provides good strength and impact resistance. It is commonly employed in applications that necessitate moderate strength and toughness, such as shafts, axles, and machinery parts. These examples represent only a fraction of the diverse grades of heat-treated steel round bars available in the market. The choice of grade depends on specific requirements like strength, hardness, toughness, and wear resistance. Seeking guidance from a knowledgeable professional is essential to determine the most suitable grade for one's particular needs.

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