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: Are steel round bars suitable for use in the construction industry?: Yes, steel round bars are commonly used in the construction industry due to their strength, durability, and versatility. They provide structural support in various applications such as reinforcement in concrete, framing, and the creation of beams and columns. Additionally, steel round bars can be easily fabricated, welded, and formed into different shapes, making them a suitable choice for a wide range of construction projects.

Q: What are the quality control measures for steel round bars?: Quality control measures for steel round bars typically involve a series of inspections and tests to ensure that the bars meet the required specifications and standards. These measures are crucial to ensure the structural integrity and reliability of the steel bars. Some common quality control measures for steel round bars include: 1. Visual Inspection: This involves a visual examination of the bars to detect any surface defects such as cracks, pits, or rust. It ensures that the bars have a smooth surface finish and are free from any visible imperfections. 2. Dimensional Inspection: This involves measuring the diameter, length, and straightness of the steel bars to ensure they meet the required tolerances. Any deviations from the specified dimensions can affect the performance and fit of the bars in various applications. 3. Chemical Composition Analysis: Steel round bars undergo chemical composition analysis to verify the percentage of various elements present in the steel. This analysis helps ensure that the bars have the correct alloying elements in the right proportions, which directly impacts their mechanical properties and performance. 4. Mechanical Testing: Various mechanical tests are performed on steel round bars to assess their strength, hardness, and other mechanical properties. These tests can include tensile testing, impact testing, and hardness testing. These tests help determine if the bars meet the required strength and durability standards. 5. Ultrasonic Testing: Ultrasonic testing is often used to detect internal defects such as voids, inclusions, or cracks in steel round bars. This non-destructive testing technique uses high-frequency sound waves to identify any flaws that may compromise the structural integrity of the bars. 6. Surface Treatment Inspection: If the steel round bars undergo any surface treatments such as heat treatment or coating, an inspection is conducted to ensure that the treatments are properly applied and meet the required specifications. 7. Certification and Documentation: Quality control measures also include proper documentation and certification of the steel round bars. This ensures traceability and provides evidence that the bars have undergone the required inspections and tests, giving customers confidence in the product's quality. Overall, these quality control measures for steel round bars help ensure that the bars are of high quality, meet the required specifications, and are suitable for their intended applications.

Q: How do steel round bars compare to titanium round bars?: Steel round bars and titanium round bars have distinct properties and are used for different purposes. Steel round bars are known for their high strength, durability, and affordability. They are commonly used in construction, manufacturing, and general engineering applications. On the other hand, titanium round bars are much lighter, have superior corrosion resistance, and exhibit high strength-to-weight ratio. This makes them suitable for aerospace, medical, and marine industries where weight reduction and resistance to harsh environments are crucial. Ultimately, the choice between steel and titanium round bars depends on the specific requirements and desired characteristics for the intended application.

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: Can steel round bars be forged?: Indeed, it is possible to forge steel round bars. The act of forging entails subjecting the steel to elevated temperatures and subsequently molding it by exerting pressure using either a forging hammer or press. In the realm of forging procedures, steel round bars frequently find application in fabricating diverse forms and items, including tools, automotive components, and machinery parts. The intense heat generated during the forging process endows the steel with enhanced malleability, rendering it more pliable and amenable to shaping, thereby yielding a final product that is robust and long-lasting.

Q: Can steel round bars be used for making staircases?: Yes, steel round bars can be used for making staircases. They provide durability, strength, and a modern aesthetic appeal to the staircase design.

Q: What are the advantages of using nickel-tin alloy steel round bars?: There are several advantages of using nickel-tin alloy steel round bars. Firstly, nickel-tin alloy steel has excellent corrosion resistance properties. This makes it ideal for applications where the round bars will be exposed to harsh environments or corrosive substances. The addition of nickel and tin enhances the overall durability and longevity of the round bars, ensuring they can withstand prolonged exposure to moisture, chemicals, and other corrosive elements. Secondly, nickel-tin alloy steel round bars offer superior strength and toughness. The combination of nickel and tin in the alloy composition enhances the overall mechanical properties of the bars, making them highly resistant to deformation, bending, and breaking. This makes them suitable for demanding applications that require high strength and durability, such as in construction, aerospace, and automotive industries. Additionally, nickel-tin alloy steel round bars exhibit excellent heat resistance. They can withstand high temperatures without significant loss of strength or deformation. This makes them ideal for applications that involve exposure to elevated temperatures, such as in furnaces, boilers, and heat exchangers. Furthermore, nickel-tin alloy steel is known for its excellent electrical conductivity. This property makes the round bars suitable for applications that require efficient electrical transmission, such as in electrical wiring, power generation, and electrical equipment manufacturing. Lastly, nickel-tin alloy steel round bars are relatively easy to machine and fabricate. They can be readily shaped, cut, and welded, allowing for versatility in various manufacturing processes. This ease of machining and fabrication ensures efficient production and reduces overall manufacturing costs. In conclusion, the advantages of using nickel-tin alloy steel round bars include excellent corrosion resistance, superior strength and toughness, high heat resistance, good electrical conductivity, and ease of machining and fabrication. These properties make nickel-tin alloy steel round bars a preferred choice for a wide range of applications in various industries.

Q: Can steel round bars be used in the manufacturing of conveyor systems?: Yes, steel round bars can be used in the manufacturing of conveyor systems. Steel is a strong and durable material that can withstand heavy loads and provide stability and support to conveyor systems. Steel round bars can be used as rollers or shafts in conveyor systems to facilitate the movement of materials or products along the conveyor belt. The smooth surface of the round bars allows for easy rotation and reduces friction, ensuring the smooth operation of the conveyor system. Additionally, steel round bars can be easily customized to fit specific conveyor system requirements, making them versatile and suitable for various industrial applications.

Q: What are the different surface treatments available for stainless steel round bars?: To enhance the appearance, improve corrosion resistance, and provide added protection for stainless steel round bars, there are various surface treatments available. Some commonly used surface treatments for stainless steel round bars are as follows: 1. Acid immersion: This process involves immersing the stainless steel bar in an acid solution to eliminate surface impurities and oxides. Acid immersion restores the natural corrosion resistance of stainless steel and results in a smooth and clean surface. 2. Chemical passivation: Passivation is a chemical treatment that forms a thin, protective layer on the surface of stainless steel. By eliminating free iron and other contaminants, passivation enhances the corrosion resistance of stainless steel. 3. Electrolytic polishing: This treatment involves immersing the stainless steel round bar in an electrolyte solution and applying an electric current. By removing a thin layer of material from the surface, electrolytic polishing creates a smooth, shiny, and corrosion-resistant finish. 4. Mechanical grinding and polishing: Grinding and polishing are mechanical processes used to improve the surface finish of stainless steel round bars. Grinding eliminates imperfections and roughness, while polishing creates a smooth and reflective surface. 5. Protective coating: Applying a protective layer to stainless steel round bars can provide additional corrosion resistance. Common coatings include electroplating with zinc or nickel, as well as organic coatings such as paints or powder coatings. 6. High-velocity shot blasting: This treatment involves bombarding the surface of the stainless steel round bar with small metallic or non-metallic particles at high speed. Shot blasting eliminates surface contaminants, scales, or oxides, resulting in a clean and textured surface. It is important to consider the desired end-use application and specific requirements for appearance and corrosion resistance when choosing a surface treatment for stainless steel round bars. Seeking advice from professionals or manufacturers can help determine the most suitable treatment.

Q: Can steel round bars be used in the manufacturing of tools?: Yes, steel round bars can be used in the manufacturing of tools. Steel round bars are commonly used in tool manufacturing due to their high strength, durability, and versatility. They provide the necessary structural integrity and toughness required for various tools, such as wrenches, hammers, chisels, and screwdrivers. The round shape of the bar allows for easy machining and shaping into different tool components. Additionally, steel round bars can be heat treated to enhance their hardness and wear resistance, making them suitable for heavy-duty and high-performance tool applications.

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