4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 1

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 2

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 3

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar System 4

4130 4140 4150 20MnCr5 42CrMo4 8620 4340 Alloy Round Steel Bar

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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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Grade:	S45CB, 40Cr, SCM440, SCM420, 42CrMo, AISI4140, customized is available.
Size:	25-450mm
Length:	5.8m/6m fixed length, or as customized.
MOQ:	20MT
Remark:	chamfering and straightness
Packing:	arround 3MT per bundle

Grade	C	Si	Mn	P	S	Cr	Mo
42CrMo4	0.38-0.45	0.17-0.37	0.40-0.70	≤0.035	≤0.035	0.90-1.20	0.15-0.25
1.7225	0.38-0.45	≤0.40	0.60-0.90	≤0.025	≤0.035	0.90-1.20	0.15-0.30
4140	0.38-0.43	0.15-0.35	0.75-1.00	≤0.035	≤0.040	0.80-1.10	0.15-0.25

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 do steel round bars differ from other types of steel bars?: Steel round bars differ from other types of steel bars primarily in their shape. Unlike flat bars or square bars, round bars have a cylindrical shape with a circular cross-section. This shape makes round bars highly versatile and suitable for various applications, such as construction, manufacturing, and engineering. Round bars also offer superior strength and durability due to their uniform composition and absence of sharp edges, making them ideal for load-bearing purposes.

Q: How are steel round bars measured and specified?: Steel round bars are measured and specified based on their diameter. The diameter of a round bar is typically measured in millimeters (mm) or inches (in). The measurement is taken across the widest point of the circular cross-section. In terms of specification, steel round bars are commonly specified by their diameter and length. For example, a specification for a steel round bar may be written as "25mm diameter x 3 meters length". This means that the bar has a diameter of 25mm and a length of 3 meters. Additionally, steel round bars may also be specified based on their tolerance, surface finish, and grade. Tolerance refers to the allowable deviation from the specified diameter. Surface finish refers to the quality of the bar's surface, which can range from rough to smooth. Grade refers to the quality and composition of the steel used to make the round bar, such as mild steel, carbon steel, or alloy steel. It is important to accurately measure and specify steel round bars to ensure that they meet the required dimensions and properties for a particular application.

Q: What are the environmental considerations of steel round bars?: Steel round bars have several environmental considerations. Firstly, the production of steel requires a significant amount of energy, which often comes from non-renewable sources, leading to greenhouse gas emissions and contributing to climate change. Additionally, the extraction and processing of raw materials for steel production, such as iron ore and coal, can have detrimental effects on local ecosystems and habitats. Furthermore, the transportation of steel round bars can result in carbon emissions if not done efficiently. However, steel is a highly recyclable material, and the use of recycled steel in the production of round bars can help reduce environmental impact. Additionally, the durability and strength of steel make it a long-lasting material, leading to less waste in the long run.

Q: What are the different safety considerations when working with steel round bars?: When working with steel round bars, there are several safety considerations to keep in mind. First and foremost, it is important to wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and steel-toed boots to protect against potential hazards. Additionally, one should always handle the steel bars with care to avoid injuries from sharp edges or heavy lifting. It is crucial to ensure a secure and stable work area to prevent slips, trips, and falls. Furthermore, when using tools or machinery to cut or shape the steel bars, proper training and caution should be exercised to prevent accidents and follow all recommended safety procedures.

Q: Can steel round bars be annealed?: Steel round bars can indeed undergo annealing, a heat treatment process in which the steel is heated to a specific temperature and gradually cooled. This procedure serves to alleviate internal stresses, enhance ductility, and improve the steel's machinability. Annealing can be employed on various steel products, including round bars, to render them more pliable, easier to work with, and minimize the likelihood of cracking or failure in subsequent manufacturing procedures.

Q: Can steel round bars be used for gear applications?: Indeed, gear applications can make effective use of steel round bars. The utilization of steel round bars in gear production is frequent owing to their remarkable robustness and endurance. These round bars exhibit exceptional mechanical attributes, including hardness and resistance to wear, both of which are indispensable for gear applications. It is possible to machine and subject steel round bars to heat treatment, thus enabling the attainment of the desired tooth profile and surface finish essential for gears. Furthermore, steel round bars guarantee commendable dimensional stability and have the capacity to withstand substantial loads and torque, rendering them suitable for diverse gear applications within industries such as automotive, machinery, and heavy equipment.

Q: What are the advantages of using nickel-chromium-aluminum alloy steel round bars?: Nickel-chromium-aluminum alloy steel round bars offer numerous benefits. Firstly, they possess exceptional corrosion resistance, making them ideal for use in harsh environments or industries where corrosion is a concern. This resistance to corrosion prolongs the lifespan of the round bars, reducing maintenance and replacement expenses. Secondly, these round bars are known for their high strength and durability, making them suitable for applications that involve heavy loads or high temperatures. Their strength also enhances structural stability, making them a dependable option for construction projects and industrial applications. Additionally, this alloy steel demonstrates excellent thermal stability, allowing it to maintain its shape and mechanical properties even under elevated temperatures. This attribute is particularly advantageous in industries such as aerospace, automotive, and power generation, where high temperatures are prevalent. Furthermore, nickel-chromium-aluminum alloy steel round bars offer good formability and machinability, facilitating easy fabrication and customization. This versatility allows for the production of intricate shapes and designs, making them adaptable for various manufacturing processes. Lastly, this alloy steel is recognized for its resistance to oxidation and scaling at high temperatures. This makes it suitable for applications involving exposure to extreme heat or rapid temperature changes, such as in furnaces or heat exchangers. In conclusion, the benefits of utilizing nickel-chromium-aluminum alloy steel round bars include exceptional corrosion resistance, high strength and durability, thermal stability, formability, and resistance to oxidation. These qualities make it a preferred choice for a wide range of industries, ensuring reliable performance and longevity in various applications.

Q: What are the different types of surface treatments for steel round bars?: There are several different types of surface treatments available for steel round bars, each with its own benefits and applications. Some of the most common surface treatments for steel round bars include: 1. Galvanization: This process involves coating the steel round bars with a layer of zinc, which provides excellent corrosion resistance. Galvanized steel round bars are commonly used in outdoor and marine applications. 2. Black oxide coating: This treatment involves chemically converting the surface of the steel round bars to a black iron oxide layer. It provides increased corrosion resistance and a visually appealing black finish. Black oxide coated steel round bars are often used in decorative applications. 3. Grinding: Grinding is a surface treatment that involves removing the outer layer of the steel round bars through abrasive materials. This process improves the surface finish of the bars, making them smoother and more aesthetically pleasing. 4. Shot blasting: In shot blasting, small metallic or non-metallic particles are propelled at high velocity onto the surface of the steel round bars. This treatment removes mill scale, rust, and other impurities, resulting in a clean and uniform surface. 5. Chrome plating: Chrome plating involves depositing a layer of chromium onto the surface of the steel round bars. This treatment provides excellent corrosion resistance and a polished, mirror-like finish. Chrome plated steel round bars are commonly used in applications where aesthetics and corrosion resistance are important. 6. Powder coating: Powder coating is a process where a dry powder is applied electrostatically to the steel round bars and then cured under heat. This treatment creates a durable and attractive finish, offering resistance to corrosion, chemicals, and UV rays. 7. Passivation: Passivation is a chemical treatment that removes iron and other contaminants from the surface of steel round bars, leaving a clean and corrosion-resistant layer. This treatment is commonly used in the medical and food industries, where cleanliness and corrosion resistance are crucial. These are just a few examples of the various surface treatments available for steel round bars. The choice of treatment depends on the specific requirements of the application, such as corrosion resistance, aesthetics, and durability.

Q: Can steel round bars be used for making automotive suspension systems?: Yes, steel round bars can be used for making automotive suspension systems. Steel round bars are commonly used in the manufacturing of suspension components such as control arms, sway bars, and torsion bars due to their high strength, durability, and ability to withstand heavy loads and vibrations.

Q: What are the advantages of using chromium-alloy steel round bars?: Chromium-alloy steel round bars offer numerous benefits. Firstly, they possess exceptional corrosion resistance. The addition of chromium enhances their ability to withstand corrosion and oxidation, making them suitable for use in harsh environments and applications involving moisture or chemicals. This resistance prolongs their lifespan, reducing maintenance and replacement expenses. Secondly, these round bars provide high strength and durability. The alloying of chromium with steel improves their mechanical properties, including tensile strength, hardness, and toughness. As a result, they are ideal for applications requiring strength and resistance to wear and tear, such as construction, heavy machinery, and the automotive industry. Another advantage is their heat resistance. The inclusion of chromium enhances the steel's ability to maintain its strength and structural integrity even at high temperatures. This makes it suitable for use in high-temperature applications like furnace components, boilers, and heat exchangers. Moreover, chromium-alloy steel round bars are known for their excellent machinability. The alloying elements in the steel enhance its ability to be easily machined, enabling precise shaping and finishing. This simplifies and reduces the cost of manufacturing complex components or parts. Lastly, these round bars are readily available in the market. Due to their popularity and widespread use, they can be easily obtained from various suppliers. This availability ensures a consistent supply of the material, minimizing production downtime and lead times. Overall, the advantages of using chromium-alloy steel round bars encompass corrosion resistance, high strength and durability, heat resistance, excellent machinability, and availability. These properties make them a versatile and dependable choice for various industries and applications.

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