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:Can steel round bars be used for making medical equipment?: Medical equipment can indeed be made using steel round bars. Steel is a versatile and durable material that is commonly used in the manufacturing of medical instruments and equipment. It possesses excellent strength and can withstand high levels of stress and pressure, making it suitable for a wide range of medical applications. Moreover, steel's resistance to corrosion and its ability to be easily sterilized ensure that the medical equipment remains hygienic and safe for use. Steel round bars can be machined, shaped, and formed into various medical instruments such as surgical tools, implants, braces, and prosthetics. Therefore, steel round bars are a viable option for producing medical equipment due to their strength, durability, and compatibility with sterilization processes.

Q:Are steel round bars used in the automotive industry?: Yes, steel round bars are commonly used in the automotive industry for various applications such as manufacturing components like axles, crankshafts, and suspension parts due to their high strength and durability.

Q:Are steel round bars resistant to corrosion?: Yes, steel round bars can be resistant to corrosion depending on the type of steel and the environment they are exposed to. Stainless steel round bars, for example, contain chromium which forms a thin passive layer on the surface that protects against corrosion. This layer is self-repairing and provides excellent resistance to corrosion in many environments, including moisture, chemicals, and saltwater. However, carbon steel round bars are not inherently corrosion-resistant and may require additional protective coatings or treatments to prevent corrosion. Therefore, it is important to consider the specific type of steel and the intended application when determining the corrosion resistance of steel round bars.

Q:Can steel round bars be used in the aerospace industry?: Steel round bars have the capacity to be utilized in the aerospace industry. Steel is a versatile substance that finds application in diverse sectors, including aerospace. In the construction of aircraft components and structures, such as landing gears, engine parts, and structural supports, steel round bars are frequently employed. Steel possesses exceptional strength and durability, crucial attributes for guaranteeing aircraft safety and reliability in the aerospace field. Moreover, steel round bars can be customized and manipulated to meet the specific design and performance necessities of aerospace applications. In summary, steel round bars are an appropriate material selection for numerous aerospace applications owing to their mechanical properties, dependability, and cost-effectiveness.

Q:Can steel round bars be used in the automotive industry?: Yes, steel round bars can be used in the automotive industry. Steel round bars are commonly used in the automotive industry for various applications. They are often utilized for manufacturing components such as axles, drive shafts, suspension parts, and steering components. Steel round bars offer high strength, durability, and resistance to wear and tear, making them suitable for withstanding the demanding conditions and loads experienced by automotive components. Additionally, steel round bars can be easily machined and welded, allowing for efficient production and assembly processes in the automotive industry. Overall, steel round bars are a reliable and cost-effective choice for automotive manufacturers, making them a popular material for use in the industry.

Q:Can steel round bars be used in outdoor applications?: Yes, steel round bars can be used in outdoor applications. Steel is a strong and durable material that is resistant to corrosion, making it suitable for outdoor use. Round bars are often used in construction, manufacturing, and infrastructure projects, where they provide structural support and reinforcement. Additionally, steel round bars can withstand various weather conditions, including rain, snow, and extreme temperatures, without losing their strength or integrity. However, it is important to select the appropriate type of steel for the specific outdoor application to ensure optimal performance and longevity.

Q:Are steel round bars suitable for machining applications?: Yes, steel round bars are commonly used in machining applications due to their high strength, durability, and machinability. They can be easily shaped, cut, drilled, and turned into various components, making them suitable for applications in industries such as automotive, aerospace, construction, and manufacturing.

Q:Are steel round bars suitable for heat exchanger applications?: Yes, steel round bars are suitable for heat exchanger applications. Steel has excellent thermal conductivity and high strength, making it a reliable choice for transferring heat efficiently in heat exchangers. Additionally, steel round bars can withstand high temperatures and pressures, making them durable and suitable for various industrial applications.

Q:What is the difference between hot rolled and cold rolled steel round bars?: The production methods and resulting qualities of hot rolled and cold rolled steel round bars differ. Hot rolled steel round bars are created by heating billets or ingots to a high temperature and shaping them into the desired form using rolling mills. This process yields a scaled surface and a relatively rough texture. The dimensions of hot rolled steel round bars have a wider tolerance and are less precise. They are commonly used in applications where precision is not crucial, such as construction and general manufacturing. In contrast, cold rolled steel round bars are produced by cooling down hot rolled steel to room temperature and subjecting it to further processing through cold rolling mills. This process leads to a smoother surface and more accurate dimensions. Cold rolled steel round bars have a tighter tolerance and are frequently employed in applications that require precision, like automotive components, machinery parts, and tools. Regarding mechanical properties, hot rolled steel round bars generally possess lower tensile strength and yield strength compared to cold rolled steel round bars. Cold rolled steel also tends to have higher hardness and a more uniform grain structure, which can enhance its strength and durability. In summary, the primary distinction between hot rolled and cold rolled steel round bars lies in their production process, surface finish, dimensional accuracy, and mechanical properties. The selection between the two depends on the specific requirements of the application and the desired qualities of the final product.

Q:What are the properties of steel round bars?: Steel round bars are widely used in various industries due to their numerous properties. Firstly, their strength and durability are highly recognized. Steel is known for its exceptional strength, which is retained in the round bar form. This makes steel round bars perfect for applications requiring high strength and toughness, such as construction, manufacturing, and engineering. Secondly, steel round bars possess excellent machinability. They can be easily cut, drilled, and shaped, making them adaptable for various projects. This characteristic allows for effortless fabrication and customization of the round bars to meet specific requirements. Moreover, steel round bars exhibit good corrosion resistance. They are often made from stainless steel or alloyed steel, enhancing their resistance to rust and other forms of corrosion. Consequently, they can be utilized in outdoor and harsh environments, where exposure to moisture and chemicals can potentially damage other materials. Another significant property of steel round bars is their exceptional thermal and electrical conductivity. This makes them suitable for applications that require efficient heat or electricity conduction, such as electrical systems or heat exchangers. Furthermore, steel round bars have a sleek and polished surface finish. This not only enhances their aesthetics but also improves their resistance to wear and tear. The smooth surface reduces friction and allows for easy movement or rotation, making steel round bars ideal for use in mechanical components and machinery. Lastly, steel round bars are available in a wide range of sizes, grades, and finishes. This provides flexibility in application and ensures the selection of the appropriate round bar based on specific requirements. In conclusion, the versatile and reliable nature of steel round bars, characterized by their strength, machinability, corrosion resistance, thermal and electrical conductivity, surface finish, and availability in various sizes and grades, make them a favored choice for numerous industrial applications.

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