AISI SAE4140 Alloy Structural Steel Round Bar SCM440
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 5 m.t.
- Supply Capability:
- 100000 m.t./month
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Specification
Standard:
AISI,JIS,GB,BS,DIN,API,EN,ASTM
Technique:
Hot Rolled,Cold Rolled,Cold Drawn,ERW,Forged,Saw,Extruded,EFW,Spring
Shape:
U Channel,Square,C Channel,Hexagonal,Round,Rectangular,Oval,LTZ
Surface Treatment:
Galvanized,Coated,Copper Coated,Color Coated,Oiled,Dry,Chromed Passivation,Polished,Bright,Black,PVDF Coated
Steel Grade:
Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400,200 Series,300 Series,400 Series,600 Series,SS400-SS490,10#,20#,A53(A,B)
Certification:
ISO,SGS,CE
Thickness:
as required
Length:
as required
Net Weight:
as required
AISI SAE4140 Alloy Structural Steel Round Bar SCM440
1 Standards and Chemical Composition:
GB-China | AISI-America | DIN-Germany | JIS-Japan |
42CrMo | 4140 | 1.7225 42CrMo4 | SCM440 |
Grade | C | Si | Mn | P | S | Cr | Mo |
SAE4140 | 0.38/0.43 | 0.15/0.35 | 0.75/1.00 | ≤0.035 | ≤0.035 | 0.80/1.10 | 0.15/0.25 |
2 Mechanical Property:
Strength of extension | 1080MPA |
Yield point | 930MPA |
Elongation | 12% |
Contractibility rate | 45% |
Impacting energy | 63J |
3 Brief Introduction:
Dimension | 14-350mm |
Length | 2-13m or as per your request |
Delivery condition | Hot rolled |
Heat Treatment | Normalizing, Annealing, Quenching |
Packing | Standard seaworthy packing or according to your requirements |
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?
We are 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?
We provide 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.
- Q:Can steel round bars be used for making pressure vessels?
- Typically, steel round bars are not employed in the production of pressure vessels due to their lack of specific properties, including high strength, good weldability, and resistance to corrosion. Although steel round bars offer strength, they may not meet all the essential criteria. Instead, pressure vessels are manufactured using specialized materials like carbon steel plates or stainless steel sheets, which satisfy the necessary standards and certifications. These materials are specifically selected for their capacity to endure the high pressures and temperatures experienced by pressure vessels.
- Q:What is hot rolling? What is called forging?
- Forging is a method of processing wool embryos by plastic deformation. They are also classified as cold forging and hot forging
- Q:How do you identify the grade of a steel round bar?
- The grade of a steel round bar can be identified through several methods, including visual inspection, markings on the bar, and using specialized testing equipment. Visual inspection involves examining the surface texture, color, and any visible defects or markings on the bar. Markings on the bar often indicate the grade, such as alphanumeric codes or symbols provided by the manufacturer. For accurate identification, specialized testing equipment like spectrometers or hardness testers can be used to analyze the chemical composition and mechanical properties of the steel.
- Q:What is the difference between a solid and a hollow steel round bar?
- A solid steel round bar is a cylindrical bar made entirely of solid steel material, meaning it is filled and does not have any hollow spaces inside. On the other hand, a hollow steel round bar is also cylindrical in shape but has a hollow center, meaning it has empty space or a void inside the bar. The main difference between a solid and a hollow steel round bar lies in their structural composition and the purposes they serve. A solid steel round bar is typically used in applications where strength and durability are of utmost importance. It is commonly used in construction, manufacturing, and engineering projects where load-bearing capacity is required. On the other hand, a hollow steel round bar is designed to be lighter in weight while still maintaining structural integrity. The hollow center allows for weight reduction while still providing sufficient strength for various applications. Hollow steel round bars are often used in industries such as aerospace, automotive, and marine, where weight reduction is critical for improved fuel efficiency and overall performance. Additionally, the hollow space inside a hollow steel round bar also provides an opportunity for customization. It can be used to house other components, such as wires or piping, allowing for a more streamlined and efficient design. This makes hollow steel round bars versatile and suitable for various applications that require both strength and weight reduction. In summary, the main difference between a solid and a hollow steel round bar lies in their structural composition and the purposes they serve. Solid steel round bars are used for applications that require maximum strength and durability, while hollow steel round bars offer weight reduction and customization options, making them suitable for applications that prioritize lightweight design without compromising structural integrity.
- Q:How do steel round bars compare to brass or copper bars?
- Steel round bars, when compared to brass or copper bars, exhibit several key differences. Firstly, steel bars are known for their superior strength and durability. They have a high tensile strength and are capable of withstanding heavy loads and impacts, making them ideal for applications that require robustness and toughness. On the other hand, brass and copper bars are relatively softer and less rigid, making them more suitable for applications that prioritize malleability and electrical conductivity. Another significant difference lies in their corrosion resistance. While brass and copper bars are known for their excellent corrosion resistance, steel bars, particularly carbon steel, are more vulnerable to rusting. However, stainless steel round bars are highly resistant to corrosion due to the presence of chromium, making them a suitable alternative to brass or copper bars in environments where corrosion is a concern. In terms of cost, steel round bars are generally more economical compared to brass or copper bars. This is primarily due to the higher availability and lower production costs associated with steel. Brass and copper, being non-ferrous metals, are less abundant and require more complex extraction and refining processes, making them relatively more expensive. Furthermore, steel round bars offer a wide range of mechanical properties, such as different grades and compositions, allowing for customization based on specific application requirements. Conversely, brass and copper bars have more limited options in terms of strength and hardness variations. Overall, the choice between steel, brass, or copper round bars depends on the specific application and desired properties. Steel bars are preferred for their strength, durability, and cost-effectiveness, while brass or copper bars are favored for their malleability, electrical conductivity, and corrosion resistance.
- Q:Can steel round bars be used in the manufacturing of shafts?
- Shafts can indeed be manufactured using steel round bars. The utilization of steel round bars for shaft production is common owing to their remarkable mechanical properties, durability, and high strength. The bar's circular form facilitates the machining and forming procedures, rendering it appropriate for producing shafts of diverse lengths and sizes. Moreover, heat treatment can be applied to steel round bars to augment their hardness, strength, and resistance to wear, thus enhancing their suitability for shaft applications.
- Q:How are steel round bars used in the construction of transmission towers?
- Transmission towers commonly use steel round bars due to their strength, durability, and ease of fabrication. These bars, typically made from high-strength carbon steel, come in various diameters to meet different structural needs. In transmission tower construction, steel round bars serve as the primary structural elements. They form the vertical and diagonal members that provide strength and stability to the tower. The bars are connected using welding or bolted connections to create the lattice structure of the tower. The round shape of the bars allows for even distribution of forces, making them ideal for handling the loads and stresses experienced by transmission towers. These loads include the tower's weight, electrical conductors, and environmental factors like wind, ice, and seismic forces. Moreover, steel round bars offer excellent corrosion resistance, which is crucial for transmission towers exposed to harsh weather conditions. This resistance helps extend the tower's lifespan and ensures the safety and reliability of the transmission lines. Additionally, steel round bars can be easily fabricated and customized to meet the specific design requirements of the transmission tower. They can be cut, bent, and shaped to the desired dimensions, providing flexibility in tower design and construction. In conclusion, steel round bars play a crucial role in the construction of transmission towers by providing strength, durability, and corrosion resistance. Their versatility and ability to withstand various loads make them an essential component in ensuring the safe and reliable transmission of electricity.
- Q:Difference between cold drawn round steel and round steel
- There are different reasons for the residual stress in hot rolled and cold-rolled steel sections, so the distribution of the residual stresses is also quite different. The residual cold-formed steel section stress distribution is curved, and hot rolled steel or steel welding section on the residual stress distribution is thin.
- Q:What is the difference between a polished and a hot rolled steel round bar?
- A polished steel round bar has undergone a process of polishing, which gives it a smooth and shiny surface finish. On the other hand, a hot rolled steel round bar is produced through a hot rolling process, resulting in a rougher and less refined surface texture.
- Q:What is the maximum weight of a steel round bar?
- The maximum weight of a steel round bar depends on its diameter and length. Steel round bars come in various sizes and weights, so it is important to specify the dimensions in order to determine the maximum weight. The weight of a steel round bar can be calculated using the formula: weight = volume × density, where volume can be calculated as πr²h (pi times the square of the radius times the height) and density is the specific weight of steel (approximately 7850 kg/m³). By plugging in the appropriate values, you can calculate the maximum weight of a steel round bar.
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AISI SAE4140 Alloy Structural Steel Round Bar SCM440
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 5 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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