Hot Rolled Alloy Structural Steel Round Bar SCM435

Hot Rolled Alloy Structural Steel Round Bar SCM435 System 1

Hot Rolled Alloy Structural Steel Round Bar SCM435 System 2

Hot Rolled Alloy Structural Steel Round Bar SCM435 System 3

Hot Rolled Alloy Structural Steel Round Bar SCM435 System 4

Hot Rolled Alloy Structural Steel Round Bar SCM435

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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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Material:	30CrMoV, 4135, SCM435, 34CrMo4, 1.7220
Diameter:	10mm-700mm
Length:	3000mm-12000mm Straightness: 3mm/M max
Process:	EAF + LF + VD + Forged + Heat Treatment (optional)
Delivery condition:	Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)
Delivery Time:	30-45 days
MOQ:	1 tons
Heat treatment:	Normalized / Annealed / Quenched / tempered
Technical Data:	According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing
Test:	Ultrasonic test according to SEP 1921-84 G3 C/c
Marking:	Grade, heat NO. length will be stamped one each bar with required color
Payment:	30% advance by T\T, the balance against B/L
Application:	Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.

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 grades of alloy steel round bars for automotive applications?: There are several different grades of alloy steel round bars used for automotive applications, including 4140, 4340, and 8620. These grades offer varying levels of strength, toughness, and wear resistance, allowing them to be used in different automotive components such as shafts, gears, and axles. The choice of grade depends on the specific requirements of the application, taking into consideration factors like load capacity, durability, and cost.

Q:Are steel round bars suitable for use in the automotive industry?: Yes, steel round bars are suitable for use in the automotive industry. Steel round bars offer several advantages that make them ideal for automotive applications. Firstly, steel round bars provide excellent strength and durability, which are crucial for automotive components that need to withstand high levels of stress and impact. The high tensile strength of steel ensures that these components can handle the demanding conditions of the automotive industry, such as heavy loads and harsh environments. Secondly, steel round bars have good machinability, allowing them to be easily shaped and fabricated into various automotive parts. This versatility is essential for creating components with complex geometries, such as crankshafts, axles, and suspension components. Furthermore, steel round bars offer superior dimensional stability, ensuring that automotive parts maintain their shape and performance over time. This is particularly important for critical components that need to meet precise specifications and tolerances. Additionally, steel round bars have excellent heat resistance, making them suitable for applications that involve high temperatures, such as engine components and exhaust systems. The thermal stability of steel ensures that these parts can operate efficiently and reliably under extreme heat conditions. Moreover, steel is readily available and cost-effective compared to other materials, making it an attractive choice for the automotive industry. The abundance of steel resources and the well-established manufacturing processes contribute to its affordability, making it a practical option for mass production. In conclusion, steel round bars are highly suitable for use in the automotive industry due to their strength, durability, machinability, dimensional stability, heat resistance, and cost-effectiveness. These qualities make steel round bars an excellent choice for various automotive components, contributing to the overall performance, safety, and longevity of vehicles.

Q:What are the different surface hardness options for steel round bars?: Steel round bars can have varying levels of surface hardness depending on the specific requirements and applications. Some of the different surface hardness options for steel round bars include: 1. Soft or annealed: This is the lowest level of surface hardness, where the steel is heated and then slowly cooled to reduce internal stress and increase ductility. Soft or annealed steel is easier to machine and form but has lower strength and wear resistance. 2. Normalized: Normalizing involves heating the steel to a specified temperature and then cooling it in air. This process refines the grain structure and improves the mechanical properties of the steel, resulting in increased hardness compared to annealed steel. 3. Quenched and tempered: This is a heat treatment process that involves heating the steel to a high temperature and then rapidly cooling it in a quenching medium like oil or water. The rapid cooling hardens the surface of the steel, while the subsequent tempering process reduces internal stresses and increases toughness. Quenched and tempered steel round bars have high hardness and strength, making them suitable for applications that require resistance to wear and impact. 4. Induction hardened: Induction hardening is a surface hardening process that involves heating only the surface of the steel round bar using an induction coil. This localized heating is followed by rapid quenching, resulting in a hardened surface layer with increased wear resistance. The core of the steel remains unaffected, retaining its toughness. 5. Case hardened: Case hardening, also known as carburizing, involves introducing carbon into the surface layer of the steel round bar. This is typically done by exposing the steel to a carbon-rich gas or by heating it with a carbon-containing material. The carbon diffuses into the surface and increases the hardness, while the core remains relatively softer. Case hardened steel round bars have a tough core with a wear-resistant surface. These are just a few of the different surface hardness options available for steel round bars. The choice of hardness will depend on the specific application requirements, such as strength, wear resistance, and toughness needed for the intended use.

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:Can steel round bars be used for making cutlery or kitchen utensils?: No, steel round bars are not typically used for making cutlery or kitchen utensils. These items are usually made from stainless steel or other food-safe materials that are specifically designed for food contact and are more suitable for the purpose.

Q:Can steel round bars be used in the textile industry?: Limited applications exist where steel round bars can be utilized in the textile industry. Although textiles are mainly composed of natural or synthetic fibers, steel round bars can be employed in the machinery and equipment employed in textile production. These bars commonly serve as the foundation for frames, supports, and other structural components of textile machinery. For instance, steel round bars can be employed to construct the frames of looms, which are essential for fabric weaving. Additionally, they can be integrated into the fabrication of spinning machines, knitting machines, and other textile manufacturing equipment. Furthermore, steel round bars can function as a base or support for textile drying racks, storage systems, or conveyor systems. The strength and durability of steel make it an appropriate material for withstanding the rigorous demands of industrial textile production. However, it is worth noting that steel round bars are not directly incorporated into the fabric or textile products themselves.

Q:What is the elasticity of a steel round bar?: The elasticity of a steel round bar refers to its ability to return to its original shape after being subjected to external forces or deformation. Steel is known for its high elasticity, meaning it can withstand significant stress and strain without permanent deformation. This property makes steel round bars suitable for various applications, including construction, manufacturing, and engineering.

Q:Can steel round bars be used in the aerospace manufacturing industry?: The aerospace manufacturing industry can indeed utilize steel round bars. In various aerospace applications like structural components, landing gear, engine components, and fasteners, steel round bars are a common choice. The reason behind this is the commendable strength and durability of steel, which makes it highly suitable for critical aerospace applications. Moreover, steel round bars can be conveniently machined and shaped into intricate forms, offering customization and precise engineering solutions in the aerospace sector. Furthermore, steel's ability to resist corrosion and withstand extreme temperatures enhances its reliability in aerospace manufacturing. Ultimately, due to their strength, durability, machinability, and corrosion resistance, steel round bars emerge as a versatile and extensively employed material in the aerospace industry.

Q:Are steel round bars suitable for marine applications?: Yes, steel round bars are suitable for marine applications. Steel is known for its strength, durability, and corrosion resistance, making it a popular choice for various marine applications. Steel round bars are commonly used in the construction of marine structures, such as shipbuilding, offshore platforms, and marine equipment. The high tensile strength of steel allows it to withstand the harsh conditions of the marine environment, including the corrosive effects of saltwater. Additionally, steel can be easily fabricated and welded, making it a versatile material for marine applications. However, it is important to consider the specific requirements of the marine application and choose the appropriate type of steel round bar. Duplex stainless steel, for example, offers superior corrosion resistance compared to standard carbon steels and is often preferred for marine applications. It is also crucial to apply proper maintenance and protective coatings to ensure the longevity and performance of steel round bars in marine environments. Overall, steel round bars are a suitable choice for marine applications due to their strength, durability, and corrosion resistance. However, it is essential to select the right type of steel and implement proper maintenance practices to ensure optimal performance in the marine environment.

Q:Are steel round bars suitable for electrical conductivity?: Steel round bars are not typically known for their electrical conductivity. Steel is a good conductor of heat but has relatively poor electrical conductivity compared to other metals such as copper or aluminum. This is because steel is primarily composed of iron, which is a poor conductor of electricity. However, the electrical conductivity of steel can be improved by adding certain alloying elements such as chromium or nickel. These alloying elements can enhance the electrical conductivity of steel, making it more suitable for specific applications where electrical conductivity is required. Nonetheless, if high electrical conductivity is a critical requirement, other materials like copper or aluminum are usually preferred over steel round bars.

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