• 4140 Mild Steel Round Bar Sizes System 1
  • 4140 Mild Steel Round Bar Sizes System 2
  • 4140 Mild Steel Round Bar Sizes System 3
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  • 4140 Mild Steel Round Bar Sizes System 6
4140 Mild Steel Round Bar Sizes

4140 Mild Steel Round Bar Sizes

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
100 m.t.
Supply Capability:
500000 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,BV,IBR,RoHS,CE,API,BSI,UL
Thickness:
13-300mm
Length:
6-12m
Net Weight:
2mt

4140 Mild Steel Round Bar Sizes

 

Product Description of 4140 Mild Steel Round Bar Sizes

1. Steel grade: ASTM4140, SCM440, 42CrMo, DIN1.7225

2. Length: 6M-12M
3. Diameter: 16mm-300mm

4. Product range: round bar, flat bar, square bar

5. Technique: Hot rolled, forged, cold drawn

 

Specification of 4140 Mild Steel Round Bar Sizes

Material

       SCM4140

Round bar

Dia(mm)

16-300mm

Process

EAF + LF + VD + Forged + Heat Treatment (optional)

Length (mm)   

Max 12m

Heat treatment

Normalized / Annealed / Quenched / tempered

Flat bar

Thickness(mm) 

8-500mm

Delivery condition

Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)

Width(mm)

70-200mm

Test

Ultrasonic test according to SEP 1921-84 D/d

Length (mm)   

Max 12m

 

Chemical Composition of 4140 Mild Steel Round Bar Sizes

C

Si

Mn

Cr

  Mo

 P

S

0.38~0.43

0.15~0.35

0.75~1.00

0.8~1.1

0.15~0.25

≤0.035

<0.04< td="">

 

Photo Show of 4140 Mild Steel Round Bar Sizes

4140 Mild Steel Round Bar Sizes

Packing and Delivery:

Packing in bundle package, or as customer's requirements.

Delivery Detail: 45 days after receiving the deposit.

 

Usage and Applications of 4140 Mild Steel Round Bar Sizes

1. Steel round bar is used in a large number of architectural and engineering structures. Or it can be used in construction of plants for the production of steel house frames, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc.

2. And we can use this kind of product on the performance of the mechanical parts if the demand is not very high.

3. Some special material steel round bar can be used for main shaft of steamer, hummer shank, with big section and supper force.


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.

Astm 615 Bs4449 B500B Deformed Steel RebarsAstm 615 Bs4449 B500B Deformed Steel Rebars 

 

F A Q

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.

Q: How do steel round bars perform under bending or flexing forces?
Steel round bars are highly resistant to bending or flexing forces due to their strong and rigid nature. They can withstand significant loads without deforming or breaking, making them ideal for applications that require structural integrity and durability.
Q: Can steel round bars be used in the manufacturing of fasteners?
Yes, steel round bars can be used in the manufacturing of fasteners. Round bars can be machined or forged into various types of fasteners such as bolts, screws, and pins. The use of steel round bars provides strength, durability, and resistance to corrosion, making them suitable for fastening applications in various industries.
Q: What is the carbon content in steel round bars?
The amount of carbon in steel round bars varies depending on the grade and type of steel utilized, causing the carbon content in carbon steel round bars to typically range from 0.08% to 1.5%. A higher carbon content grants greater strength and hardness, albeit at the expense of weldability and ductility. The customer can specify the precise carbon content during the manufacturing process, tailoring it to their desired mechanical properties and application needs.
Q: Can steel round bars be used for making sculptures?
Certainly, sculptures can be created using steel round bars. Steel, being an adaptable and long-lasting material, can be shaped into diverse forms and figures. Round bars, in particular, are ideal for sculpting because they offer a sleek and curved aesthetic. Steel sculptures are recognized for their robustness, durability, and ability to endure various weather conditions, making them suitable for both indoor and outdoor installations. Furthermore, steel can be effortlessly welded, bent, and molded, providing artists with the opportunity to explore their artistic abilities and produce intricate designs. By employing proper techniques and expertise, steel round bars can be transformed into breathtaking sculptures that infuse any space with a contemporary and industrial flair.
Q: 40CrMo what is the round steel material?
High strength, high hardenability, good toughness, little deformation during quenching and high creep strength and lasting strength at high temperature.
Q: How do you calculate the bending stress in a steel round bar?
The bending stress in a steel round bar can be calculated using the formula: Bending Stress = (Moment * Radius) / (Section Modulus). The moment is calculated by multiplying the applied force by the distance from the force to the center of the bar. The radius is the radius of the round bar, and the section modulus is a property of the bar's cross-sectional shape that indicates its resistance to bending.
Q: How are steel round bars used in the construction of stadiums and sports facilities?
Due to their strength, durability, and versatility, steel round bars find wide application in the construction of stadiums and sports facilities. Typically made from carbon steel, these bars come in various diameters and lengths to cater to the specific requirements of each project. An important function of steel round bars in stadium construction is reinforcing concrete structures. They are commonly embedded within concrete columns, beams, and slabs to enhance their load-bearing capacity and overall structural integrity. The exceptional tensile strength of steel enables it to withstand heavy loads and provide crucial support for large seating areas, roofs, and other architectural elements. Moreover, steel round bars are utilized in the construction of stadium roofs and canopies. These structures demand a material that is both strong and lightweight, capable of spanning long distances without excessive reliance on support columns. Steel bars, when designed and installed properly, offer an optimal solution by providing the necessary strength while minimizing the number of support elements, thus allowing unobstructed views and spacious seating arrangements. In addition, steel round bars are commonly employed in the fabrication of stadium fences, guardrails, and handrails. These components are essential in ensuring the safety and security of spectators, preventing falls or accidents in elevated areas, and guiding the flow of people within the facility. The high tensile strength of steel makes it an ideal material for these applications, providing the necessary resistance against impact. To summarize, steel round bars play a crucial role in the construction of stadiums and sports facilities. Their strength, durability, and versatility make them the preferred choice for reinforcing concrete structures, constructing roofs and canopies, and fabricating safety components. By incorporating steel round bars, stadiums can be built to withstand heavy loads, offer unobstructed views, and ensure the safety of spectators, ultimately enhancing the overall experience for sports enthusiasts.
Q: What are the advantages of using chromium-alloy steel round bars?
There are several advantages to using chromium-alloy steel round bars. Firstly, the presence of chromium in the alloy significantly enhances the corrosion resistance of the steel, making it ideal for applications in harsh environments or exposed to corrosive substances. Additionally, chromium-alloy steel round bars offer excellent strength and hardness, making them suitable for heavy-duty applications that require high load-bearing capacity. The inclusion of chromium also improves the steel's heat resistance, allowing it to withstand high temperatures without losing its structural integrity. Lastly, chromium-alloy steel round bars are known for their excellent wear resistance, making them a reliable choice for industries such as automotive, construction, and manufacturing.
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.
Q: What is the difference between a seamless and a welded steel round bar?
The manufacturing process and resulting structural integrity are what differentiate seamless and welded steel round bars. Seamless steel round bars are made by piercing a solid billet of steel and then rolling it into a round shape. This process ensures a smooth and continuous surface throughout the length of the bar, without any seams or welds. By eliminating the weld, potential weaknesses and vulnerabilities are also eliminated. Seamless steel bars have a more uniform composition and a higher strength-to-weight ratio due to the absence of welds. On the other hand, welded steel round bars are created by joining multiple pieces of steel together using various welding techniques. The steel pieces are heated and fused together at the edges to form a continuous bar. While welding provides flexibility in terms of length and diameter options, it can introduce structural concerns. Welded joints may have defects like porosity or inclusions, which can compromise the overall strength and integrity of the bar. However, advancements in welding technology and quality control have improved the reliability of welded steel round bars. Seamless steel round bars are preferred in critical industries like oil and gas, aerospace, and automotive sectors, where high strength, reliability, and resistance to corrosion are essential. On the other hand, welded steel round bars are commonly used in less demanding applications like construction, manufacturing, and general engineering, where cost-effectiveness and availability are more important. In conclusion, the manufacturing process and resulting structural characteristics are what set seamless and welded steel round bars apart. Seamless bars offer a smoother surface, higher strength-to-weight ratio, and greater resistance to defects, while welded bars are more cost-effective and readily available, though they may have weld-related vulnerabilities. The choice between the two depends on the specific requirements and priorities of the intended use.

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