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: What are the quality control measures for steel round bars?: Steel round bars are subject to a series of inspections and tests to ensure that they meet the necessary standards and specifications. These measures play a vital role in guaranteeing the bars' structural integrity and reliability. Common quality control measures for steel round bars include: 1. Visual Inspection: Bars are visually examined to identify any surface defects like cracks, pits, or rust. This ensures that the bars have a smooth surface finish and are free from visible imperfections. 2. Dimensional Inspection: The diameter, length, and straightness of the bars are measured to ensure they adhere to the required tolerances. Any deviations from the specified dimensions can impact the bars' performance and compatibility in different applications. 3. Chemical Composition Analysis: Chemical composition analysis is carried out to confirm the percentage of various elements present in the steel. This analysis ensures that the bars possess the correct alloying elements in the proper proportions, which directly influence their mechanical properties and performance. 4. Mechanical Testing: Various mechanical tests are conducted to assess the bars' strength, hardness, and other mechanical properties. These tests may include tensile, impact, and hardness testing. They help determine if the bars meet the necessary durability and strength standards. 5. Ultrasonic Testing: Ultrasonic testing is often employed to detect internal defects such as voids, inclusions, or cracks within the steel round bars. This non-destructive testing technique utilizes high-frequency sound waves to identify flaws that may compromise the bars' structural integrity. 6. Surface Treatment Inspection: If the steel round bars undergo any surface treatments like heat treatment or coating, an inspection is conducted to ensure that these treatments are correctly applied and meet the required specifications. 7. Certification and Documentation: Quality control measures also encompass proper documentation and certification of the steel round bars. This ensures traceability and provides evidence that the bars have undergone the necessary inspections and tests, instilling confidence in customers regarding the product's quality. In summary, these quality control measures for steel round bars guarantee their high quality, compliance with necessary specifications, and suitability for their intended applications.

Q: What are the advantages of using nickel-molybdenum-vanadium alloy steel round bars?: There are several advantages of using nickel-molybdenum-vanadium alloy steel round bars, including: 1. High strength and durability: Nickel-molybdenum-vanadium alloy steel round bars offer excellent strength and durability, making them suitable for applications that require a high level of structural integrity. This alloy steel is known for its ability to withstand heavy loads and resist deformation, making it ideal for use in industries such as construction, automotive, and aerospace. 2. Corrosion resistance: Another advantage of using nickel-molybdenum-vanadium alloy steel round bars is their excellent resistance to corrosion. The addition of nickel and vanadium to the alloy enhances its ability to resist oxidation and corrosion, even in harsh environmental conditions. This makes it a preferred choice for applications where exposure to moisture, chemicals, or corrosive substances is expected. 3. Heat resistance: Nickel-molybdenum-vanadium alloy steel round bars have a high heat resistance, making them suitable for applications that involve high temperatures. The presence of molybdenum in the alloy increases its resistance to thermal stress, ensuring that it remains structurally stable even at elevated temperatures. This makes it ideal for use in industries such as oil and gas, power generation, and heat exchangers. 4. Versatility: The versatility of nickel-molybdenum-vanadium alloy steel round bars is another advantage. This alloy can be easily forged, machined, and welded, allowing for a wide range of manufacturing processes. Its versatility makes it a preferred choice for applications that require complex shapes and designs, such as shafts, gears, and valves. 5. Cost-effective: Despite its numerous advantages, nickel-molybdenum-vanadium alloy steel round bars are relatively cost-effective compared to other high-performance alloys. Its excellent combination of properties makes it a cost-efficient option for various industries, as it offers a longer lifespan, reduced maintenance requirements, and improved performance, ultimately resulting in cost savings over time. In conclusion, the advantages of using nickel-molybdenum-vanadium alloy steel round bars include high strength and durability, corrosion resistance, heat resistance, versatility, and cost-effectiveness. These properties make it a preferred choice for a wide range of applications in various industries.

Q: What are the typical hardness values for different grades of steel round bars?: The hardness values for different grades of steel round bars can vary depending on the specific grade and the manufacturing process used. However, there are some typical hardness values that can be used as a general guideline. For low carbon or mild steel round bars, the typical hardness values range from about 120 to 250 Brinell Hardness (HB). These grades of steel are known for their relatively low strength and hardness but can be easily machined and welded. Medium carbon steel round bars, commonly used in applications that require higher strength and hardness, typically have hardness values ranging from about 200 to 400 HB. These grades of steel are often used in construction, automotive, and machinery industries. High carbon or alloy steel round bars, which offer even greater strength and hardness, can have hardness values ranging from 400 to 700 HB or even higher. These grades of steel are commonly used in applications that require high wear resistance, such as cutting tools, gears, and bearings. It is important to note that these hardness values are approximate and can vary depending on factors such as heat treatment, alloy composition, and the specific manufacturing process employed. Therefore, it is always recommended to consult the manufacturer's specifications or conduct hardness testing to determine the exact hardness values for a specific grade of steel round bar.

Q: Do steel round bars have a maximum load capacity?: Yes, steel round bars have a maximum load capacity. The load capacity depends on various factors such as the diameter, length, and grade of the steel used. Engineering calculations and standards determine the maximum load capacity for specific applications and ensure the safety of the structure or component being supported by the steel round bars.

Q: What is the standard length of a steel round bar?: The standard length of a steel round bar can differ based on the specific industry and its intended usage. Nevertheless, in most cases, a steel round bar typically measures 20 feet or 6 meters. This particular length finds extensive application in construction, manufacturing, and engineering sectors. It is worth mentioning that custom lengths can also be acquired to align with the specific needs of a project or application.

Q: Can steel round bars be used in the hospitality industry?: Yes, steel round bars can be used in the hospitality industry. Steel round bars are versatile and durable, making them suitable for various applications within the industry. They can be used for constructing furniture, such as chairs, tables, and bar stools, as well as for creating decorative elements like railings, light fixtures, and signage. Steel round bars also provide excellent strength and stability, ensuring the safety of guests and staff. Moreover, they can be easily customized to match the desired aesthetic and design preferences of different hospitality establishments. Overall, steel round bars are a reliable and practical choice for the hospitality industry due to their durability, versatility, and aesthetic appeal.

Q: What is the difference between a ground and a polished steel round bar?: A ground steel round bar refers to a bar that has undergone a grinding process to achieve a smooth and precise outer surface. On the other hand, a polished steel round bar refers to a bar that has been polished to enhance its appearance, often resulting in a shiny and reflective surface. While both processes improve the surface quality of the bar, grinding focuses on accuracy and removing imperfections, while polishing is primarily done for aesthetic purposes.

Q: What are the advantages of using weather-resistant steel round bars?: Weather-resistant steel round bars have numerous benefits. Firstly, they are specifically designed to withstand harsh weather conditions, such as corrosion, rust, and degradation caused by rain, snow, humidity, and saltwater environments. This makes them ideal for outdoor applications like construction projects, marine structures, and coastal infrastructure. Secondly, weather-resistant steel round bars eliminate the need for extra protective coatings or treatments. Unlike regular steel, which requires frequent maintenance and painting to prevent rust and corrosion, these bars develop a natural protective layer called patina. This patina acts as a barrier against further corrosion, reducing maintenance requirements and extending the material's lifespan. Thirdly, these bars offer exceptional strength and durability. They are manufactured with a special alloy composition that enhances their mechanical properties, making them highly resistant to impact, bending, and fatigue. This makes them perfect for structural applications in bridges, building frameworks, and heavy machinery. Additionally, weather-resistant steel round bars have aesthetic advantages. The unique patina that forms on their surface gives them an attractive reddish-brown color, adding a visually appealing element to architectural and design purposes. Lastly, the use of weather-resistant steel round bars contributes to sustainability and cost-effectiveness. Their long lifespan and low maintenance requirements make them a more sustainable option compared to traditional steel. While the initial investment may be higher, the long-term savings in maintenance and replacement costs make them a cost-effective choice in the long run. In conclusion, the benefits of using weather-resistant steel round bars include their ability to withstand harsh weather conditions, eliminate the need for additional protective coatings, provide exceptional strength and durability, offer aesthetic appeal, and contribute to sustainability and cost-effectiveness.

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: Are steel round bars suitable for the production of bearings?: Steel round bars are unsuitable for bearing production. Bearings necessitate materials with specific properties, including high hardness, wear resistance, and a low friction coefficient. Steel round bars lack these characteristics in their raw form and would require additional processing and treatments to acquire the necessary properties for bearing production. Bearing materials are generally chosen from alloys like stainless steel, chrome steel, or ceramic materials that are designed to withstand challenging conditions and offer optimal performance.

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