35cd4 Alloy Structural Steel Round Bars System 1

35cd4 Alloy Structural Steel Round Bars System 2

35cd4 Alloy Structural Steel Round Bars System 3

35cd4 Alloy Structural Steel Round Bars System 4

35cd4 Alloy Structural Steel Round Bars

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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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Grade	Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)	Reduction of Area (%)	Charpy Impact (J)	Hardness (HB)
35cd4	≥985	≥835	≥12	≥45	≥63	229

Grade	C	Cr	Mo	Si	Mn	P	S	Ni	Cu
35cd4	0.32-0.40	0.80-1.10	0.15-0.25	0.17-0.37	0.40-0.70	≤0.035	≤0.035	≤0.30	≤0.30

Carbon Steel Round Bar	SS400, S235JR,Q235, ASTM A36, Fe360A, Fe360B,SM400A,080A15, SS41,E235B
SAE 1020, AISI 1020, ASTM 1020, S20C, 20#, 050A20
SAE 1045, AISI 1045, ASTM 1045, S45C, 45#,EN8, XC45, XC48, 45B, C45, CK45, CM45, 060A47, R683/IC45e
Alloy Steel Round Bar	40Cr, DIN 1.7035, SAE 5140, AISI 5140, ASTM 5140, SCr440, 41Cr4, 530A40, 42Cr4, 40X, R683/VII3
SAE4140,42CrMo, 42CrMo4, DIN 1.7225, SCM440,EN19, 42CD4, 708M40, R683/II3
SAE 4340, 40CrNiMoA, EN24, SNCM439, 817M40,40XMA, R683/III4
SAE 8620,,AISI 8620, ASTM 8620, 20CrNiMo,SNCM220, 805M20
SAE52100, AISI52100,ASTM E52100, GCr15, SUJ2, 100C6, 100Cr6, 1.3505, 534A99, IIIX15

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 different types of corrosion-resistant steel round bars?: In the market, one can find a variety of corrosion-resistant steel round bars. The most commonly used types are as follows: 1. Stainless Steel Round Bars: Stainless steel is a popular choice when it comes to applications that require resistance to rust and corrosion. Its high resistance stems from the presence of chromium, which creates a protective oxide layer on the steel's surface, effectively preventing further corrosion. 2. Duplex Stainless Steel Round Bars: Duplex stainless steel is a unique type of stainless steel that combines austenite and ferrite microstructures in a balanced manner. This combination grants it exceptional corrosion resistance, high strength, and excellent weldability. 3. Nitronic Stainless Steel Round Bars: Nitronic stainless steel is an alloy known for its exceptional performance. It offers superior corrosion resistance, high strength, and good ductility. The presence of nitrogen further enhances its ability to resist pitting and crevice corrosion. 4. Alloy Steel Round Bars: Alloy steel refers to steel that has been alloyed with various elements in order to enhance its properties. Some alloy steels, including corrosion-resistant alloys (CRA), are specifically designed to withstand corrosion in harsh environments. These alloys typically contain elements such as chromium, nickel, and molybdenum. 5. Aluminum Round Bars: Although not technically steel, aluminum round bars are commonly used in applications where corrosion resistance is crucial. Aluminum forms a protective oxide layer on its surface, effectively preventing corrosion. It is particularly suitable for applications where weight is a concern. 6. Copper-Nickel Round Bars: Copper-nickel alloys, such as Cu-Ni 90/10 and Cu-Ni 70/30, are extensively utilized in marine and offshore applications due to their excellent resistance to seawater corrosion. These alloys possess high strength, good ductility, and exceptional resistance to biofouling. These examples represent only a fraction of the corrosion-resistant steel round bars available in the market. The choice of material depends on specific application requirements, environmental conditions, and budget considerations. Consulting a materials engineer or specialist is crucial in selecting the most suitable corrosion-resistant steel round bar for a particular application.

Q: Lightning protection earthing zinc plating flat iron and round steel welding method, need to flat iron wrapped in round steel outside welding?: The flat steel is not required to be wrapped outside the round bar, and the round steel can be directly welded on the flat steel, and the welding joint area can not be smaller than round steel or flat steel, and the section is a cross section

Q: Difference between forging and round steel: The advantages of a casting include an extensible length, a contracted cross section, a contracted length, an extended cross section, a variable length, and a variable cross section. The types of casting are free forging / hand forging, hot die forging / precision forging, top forging, roll forging and die forging.Forgings are not limited to round shapes.Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter.Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Of them: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets.

Q: What are the common sizes of steel round bars?: The common sizes of steel round bars vary depending on the specific application and industry standards. However, some of the most common sizes range from 1/4 inch to 24 inches in diameter. These sizes are often available in increments of 1/8 inch or 1/4 inch. It is important to note that these sizes may differ based on the country or region as well. Additionally, steel round bars can also be available in metric sizes, which typically range from 6mm to 600mm in diameter. Overall, the selection of steel round bar sizes is extensive, allowing for a wide range of applications across various industries.

Q: Can steel round bars be used for making cutting tools?: Yes, steel round bars can be used for making cutting tools. Steel is a versatile material known for its strength and durability, making it suitable for various applications including cutting tools. The round bars can be shaped and sharpened to create different types of cutting tools such as knives, blades, or drill bits.

Q: Are steel round bars suitable for outdoor applications?: Yes, steel round bars are often suitable for outdoor applications due to their high strength, durability, and resistance to weather conditions such as corrosion.

Q: What is the maximum elongation of steel round bars?: The maximum elongation of steel round bars can vary depending on the specific grade and composition of the steel. However, in general, the maximum elongation for steel round bars is typically around 20-30% of its original length. This means that the steel round bar can stretch or elongate by up to 20-30% before reaching its breaking point or ultimate tensile strength. It is important to note that this maximum elongation is influenced by various factors such as the quality of the steel, the manufacturing process, and any heat treatment applied to the bars. Therefore, it is advisable to consult the specific manufacturer's specifications and consider the intended application of the steel round bars to determine the maximum elongation for a particular case.

Q: Are steel round bars suitable for aerospace applications?: Yes, steel round bars can be suitable for aerospace applications. Steel is known for its high strength, durability, and resistance to corrosion, which are important factors in the aerospace industry. Steel round bars can be used in various aerospace components and structures such as landing gear, engine components, and structural supports. However, it is important to note that the specific grade and composition of the steel round bars must meet the stringent requirements and standards set by the aerospace industry. Additionally, other factors such as weight reduction efforts and the use of advanced materials like titanium and composites are also considered in aerospace applications.

Q: What are the different surface roughness options for steel round bars?: Steel round bars offer several surface roughness options, which are determined by the manufacturing process and the intended end-use. 1. Hot Rolled bars have a rough and scaled surface due to the high temperature during formation, causing oxidation and scale formation. The degree of roughness varies based on the manufacturing process. 2. Cold Drawn bars, processed at room temperature, provide a smoother surface finish compared to hot rolled bars. The cold drawing process reduces diameter through a die, resulting in a more consistent roughness. 3. Peeled and Polished bars undergo a secondary process to eliminate scale and surface defects. This involves peeling the outer layer and polishing the surface for a refined finish with minimal imperfections. 4. Ground bars are processed using a grinding machine to achieve precise and smooth surface finish. Irregularities and defects are removed, ensuring a uniform roughness. These bars are ideal for applications requiring dimensional accuracy and a smooth surface. 5. Turned and Polished bars are processed on a lathe machine, removing the outer layer using a cutting tool. This process yields a smooth and polished finish, making them suitable for applications where aesthetics and high-quality surface are crucial. Ultimately, the choice of surface roughness option for steel round bars depends on specific application requirements. Factors like dimensional accuracy, surface finish, and aesthetics influence the most suitable option for a given use case.

Q: What are the different types of defects that can occur in steel round bars?: Steel round bars can experience a range of defects that differ in severity and impact on overall quality and performance. Common types of defects include surface defects, internal defects, dimensional defects, decarburization, lamination, and incomplete heat treatment. Surface defects, such as scratches, pits, and scaling, are visible on the external surface of the bar. While these defects may not compromise the bar's structural integrity, they can affect its aesthetic appeal and potentially lead to corrosion if not addressed properly. Internal defects, like voids, inclusions, and segregation, occur within the body of the bar. These defects can weaken the bar's mechanical properties, jeopardize its structural integrity, and even cause cracking or failure under stress. Dimensional defects refer to variations in the size or shape of the bar, such as differences in diameter, length, or straightness. These defects can occur during manufacturing and can impact the bar's functionality and compatibility with other components. Decarburization is a defect that arises when the surface layer of the bar loses carbon due to exposure to high temperatures during manufacturing or heat treatment. This defect weakens the bar's hardness and strength, making it more susceptible to wear, fatigue, or failure. Lamination defects occur when there are layers or separations within the bar, often resulting from inadequate rolling or processing techniques. These defects reduce the bar's strength and ductility, making it prone to fracture or failure. Incomplete heat treatment can occur if the process is not performed correctly or if there are inconsistencies in cooling or reheating. This can lead to variations in hardness, strength, or toughness along the length of the bar. Manufacturers and quality control teams employ various testing and inspection methods to detect and mitigate these defects, ensuring that the bars meet the necessary standards and specifications. It is crucial to consider the specific application and requirements of the steel round bar when assessing the severity and impact of these defects.

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