• SCM440 Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars System 1
  • SCM440 Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars System 2
  • SCM440 Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars System 3
SCM440 Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars

SCM440 Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
123 m.t.
Supply Capability:
2005544 m.t./month

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Description of steel round bar:

1. Commodity: Round steel bar 

3. Technical: Hot rolling 
2. Length: Min. 5.8meter, according to requirement.
3. Diameter: 16mm-250mm

5. Packing: In Bundle or according to your requirements.


Festures of steel round bar:

1.Dia 80-800mm Length:2000-13000mm or as required 
2.Technique:Forged 
3.Delivery Time:45 days 

 

Specifications of steel round bar:

1. Commodity: Round steel bar 

3. Technical: Hot rolling 
2. Length: Min. 5.8meter, according to requirement.
3. Diameter: 16mm-250mm

 

Images of steel round bar:

SCM440 Forged or Hot Rolled Sae 4140 Alloy Steel Round Bars

FAQ:                                               

1. What is your main market?

We mainly export to Asia such as Japan,Korea,Thailand and North America and Middle East.

2. How long is the lead time?

Delivery time: 45 days after order confirmed.

3. What  payment term do you accept?

Payment: T/T or L/C at sight.

4.Why do you choose to cooperate with us?

We have over10 years experience in this business so we are able to provide you the high quality products with the best price.

Q:What is galvanized round bar?
Galvanized round bar generally refers to the wiring used for lightning protection in construction and installation. It is made of ordinary round steel (usually 8mm to 12mm diameter) and protected by electro galvanized protection layer. Galvanizing, differentiation, plating and electroplating, cold galvanizing and hot galvanizing etc..
Q:How do you calculate the weight of a steel round bar based on its volume and density?
To determine the weight of a steel round bar based on its volume and density, one can utilize the following formula: Weight = Volume x Density Initially, ascertain the volume of the round bar. The volume of a cylinder, which represents the shape of a round bar, can be computed using the subsequent equation: Volume = π x (diameter/2)^2 x length Here, π denotes a mathematical constant that is roughly equivalent to 3.14159, and the diameter and length are the measurements of the round bar. Once the volume is determined, it is necessary to know the density of the steel. The density of steel may differ depending on the type and grade of steel employed. Typically, density is measured in kilograms per cubic meter (kg/m^3) or pounds per cubic inch (lbs/in^3). The density of steel can be found in reference materials or on the internet. Ultimately, the volume should be multiplied by the density to acquire the weight of the steel round bar. Ensure that the units of volume and density are consistent. For instance, if the volume is given in cubic inches and the density is in pounds per cubic inch, the weight will be expressed in pounds. Conversely, if the volume is in cubic meters and the density is in kilograms per cubic meter, the weight will be in kilograms. It is essential to note that this calculation assumes that the round bar is entirely composed of steel and possesses a uniform density throughout its volume. Moreover, this calculation disregards any other factors that may influence the weight, such as impurities or surface finish.
Q:What is the difference between a cold-drawn and a polished steel round bar?
A cold-drawn steel round bar and a polished steel round bar differ in their manufacturing processes and resulting properties. A cold-drawn steel round bar is produced by pulling or drawing a hot-rolled steel bar through a die or series of dies to reduce its diameter and increase its length. This process is done at room temperature, which imparts certain characteristics to the steel. Cold-drawn steel bars have a smooth and shiny surface, with tight dimensional tolerances and improved mechanical properties. The cold drawing process refines the microstructure of the steel, making it stronger, more uniform, and less prone to defects. These bars are commonly used in applications that require high strength, precision, and resistance to fatigue, such as automotive components, machinery, and tooling. On the other hand, a polished steel round bar undergoes a different treatment process. After the steel bar is formed, it goes through polishing, which involves grinding or buffing the surface to achieve a smooth and reflective finish. Polished steel bars have a shiny and mirror-like appearance due to the removal of surface imperfections and contaminants. This process is primarily done for aesthetic purposes and does not significantly alter the mechanical properties of the steel. Polished steel round bars are commonly used in decorative applications, architectural designs, and furniture. In summary, the main difference between a cold-drawn and a polished steel round bar lies in their manufacturing processes and intended applications. Cold-drawn bars undergo a precise cold drawing process to improve their mechanical properties, while polished bars are subjected to surface polishing for an aesthetically pleasing finish.
Q:Can steel round bars be used for tooling applications?
Tooling applications can indeed utilize steel round bars. Steel, being a highly versatile material, possesses exceptional strength, durability, and resistance to wear and tear. By machining, heat treating, and shaping round bars made of steel, one can create a wide range of tools, including punches, dies, drills, and lathe tools. The round shape of these bars facilitates effortless machining and shaping processes. Moreover, the performance of steel round bars in specific tooling applications can be further enhanced through surface treatments or coatings. All in all, due to their outstanding mechanical properties and adaptability, steel round bars find widespread application in tooling.
Q:What is the red hardness of a steel round bar?
The red hardness of a steel round bar refers to its ability to maintain hardness and resist deformation at high temperatures, typically around 500°C to 600°C. This property is crucial for applications involving cutting tools and high-temperature environments.
Q:Can steel round bars be used in structural applications?
Steel round bars are suitable for structural applications and commonly utilized in construction and engineering projects that prioritize strength and durability. They offer versatility and can function as beams, columns, and supports for various structural elements. Thanks to their exceptional mechanical properties, such as high tensile strength and good ductility, they can withstand heavy loads and resist deformation effectively. Moreover, their easy joinability to other structural components contributes to their popularity within the construction industry.
Q:What is the maximum weight that can be lifted using a steel round bar as a lifting rod?
The maximum weight that can be lifted using a steel round bar as a lifting rod depends on several factors such as the diameter and length of the bar, the material composition and quality of the steel, and the lifting technique employed. Steel round bars have different load-bearing capacities based on their dimensions and grade. The load-bearing capacity of a steel bar can be calculated using engineering principles and formulas specific to the material and geometry of the bar. To determine the maximum weight that can be lifted with a particular steel round bar, it is necessary to consider its ultimate tensile strength (UTS), yield strength, and factor of safety. The UTS represents the maximum stress a material can withstand before failure, while the yield strength is the stress at which permanent deformation occurs. The factor of safety is a design parameter that accounts for uncertainties and ensures structural integrity. It is crucial to consult engineering references, standards, or professionals to obtain accurate and reliable information regarding the load-bearing capacity of a specific steel round bar. They can provide the necessary calculations, taking into account the diameter, length, and material properties of the bar, as well as the intended lifting application and safety requirements. In summary, the maximum weight that can be lifted using a steel round bar as a lifting rod depends on various factors and cannot be determined without considering the specific characteristics of the bar and the lifting scenario. Consulting engineering resources or experts is essential to ensure safe and accurate calculations.
Q:Can steel round bars be coated for added protection?
Yes, steel round bars can be coated for added protection. Coating them with materials like epoxy, zinc, or other corrosion-resistant substances can help prevent rusting, extend their lifespan, and enhance their resistance to various environmental factors.
Q:What are the typical tolerances for steel round bars?
The typical tolerances for steel round bars can vary depending on the specific grade and size of the bar. However, common industry standards typically specify tolerances in terms of diameter deviation, straightness, and length. For diameter, tolerances can range from +/- 0.005 to +/- 0.25 inches, again depending on the bar size. Straightness tolerances are often specified as a maximum deviation per foot or meter, such as 0.010 inches per foot. Length tolerances can range from +/- 0.125 to +/- 1 inch. It's important to consult the appropriate industry standards or supplier specifications for precise tolerances based on the specific requirements of the project or application.
Q:Can steel round bars be used in the agricultural industry?
Indeed, the agricultural industry can utilize steel round bars. Within this sector, there exists a broad array of applications for them, including the construction of fences, gates, and livestock enclosures. Moreover, steel round bars are frequently employed as support and reinforcement in structures like barns, sheds, and agricultural machinery. Due to their exceptional strength and durability, they are well-suited for enduring the challenging conditions and heavy loads often encountered in agricultural environments. Furthermore, steel round bars can undergo further processing and fabrication, resulting in an assortment of agricultural tools and equipment, such as hitches, plows, and cultivators. In summary, steel round bars represent a versatile and dependable material capable of effectively satisfying the agricultural industry's requirements.

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