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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Quality Product, Order Online Tracking, Timely Delivery
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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: What are the different types of steel round bar alloys for improved wear resistance?
- Various steel round bar alloys have been specifically developed to enhance wear resistance. These alloys are designed to possess increased hardness and toughness, making them suitable for situations where constant friction or abrasive forces are present. One popular alloy is tool steel, which includes variations such as H13, D2, and A2. Tool steel is renowned for its high hardness, exceptional wear resistance, and good toughness. It finds common usage in applications such as molding and forming tools, cutting tools, and dies. Stainless steel is another alloy utilized for improved wear resistance. Stainless steel round bars are resistant to corrosion and possess strong properties. They are frequently employed in applications like food processing equipment, medical devices, and marine components. Abrasion-resistant steel, also referred to as AR steel, is a distinct type of alloy used to enhance wear resistance. AR steel is specially formulated to endure impacts and abrasion, making it ideal for applications in mining equipment, construction machinery, and material handling systems. Manganese steel is another alloy that provides exceptional wear resistance. It is commonly utilized in applications involving high impact and abrasive wear, such as crusher jaws, railroad crossings, and excavator buckets. Lastly, there are specialty alloys like chrome-moly steel (chromium-molybdenum) and nickel-chromium alloys, which offer superior wear resistance under specific conditions. These alloys are frequently employed in high-temperature applications, such as aerospace components, power generation equipment, and automotive parts. In conclusion, a variety of steel round bar alloys, including tool steel, stainless steel, abrasion-resistant steel, manganese steel, and specialty alloys, have been developed to enhance wear resistance. Each alloy possesses unique properties and is suitable for specific applications where wear resistance is crucial.
- Q: Can steel round bars be used for making pressure vessels?
- No, steel round bars are not typically used for making pressure vessels. Pressure vessels require materials with specific properties such as high strength, good weldability, and resistance to corrosion. While steel round bars can provide strength, they may not fulfill all the necessary criteria. Pressure vessels are usually made from specialized materials such as carbon steel plates or stainless steel sheets that meet the required standards and certifications. These materials are specifically chosen for their ability to withstand the high pressures and temperatures that pressure vessels are subjected to.
- Q: How do you measure the straightness of a steel round bar?
- To measure the straightness of a steel round bar, there are a few methods that can be used. One common method is to use a straight edge or ruler and place it along the length of the bar, checking for any gaps or deviations. If the bar is perfectly straight, it should be in contact with the straight edge along its entire length. Any gaps or deviations indicate that the bar is not perfectly straight. Another method is to use a laser alignment system. This involves placing the round bar on a flat surface and using a laser to project a line along its length. The laser will show any deviations or bends in the bar by the way the line is projected. This method provides a more accurate measurement of straightness. In addition, a precision measuring instrument called a dial indicator can be used. This device has a small probe that is placed against the surface of the round bar. As the bar is rotated, the dial indicator will measure any variations in the surface, indicating any bends or deviations from straightness. It is important to note that the level of straightness required will depend on the specific application of the steel round bar. In some cases, a minor deviation may be acceptable, while in others, a high degree of straightness may be necessary.
- Q: What is the maximum length of a steel round bar available?
- The maximum length of a steel round bar available depends on various factors such as the manufacturing capabilities of the steel supplier, transportation limitations, and practical considerations. However, typical maximum lengths range from 20 to 40 feet (6 to 12 meters), but it is always best to consult with a steel supplier to determine the specific lengths they offer.
- Q: What is the difference between a seamless and a turned steel round bar?
- The manufacturing process and resulting characteristics distinguish a seamless steel round bar from a turned steel round bar. To produce a seamless steel round bar, a solid steel billet is pierced, typically through hot rolling. This creates a hollow tube-like structure that is then elongated and shaped into the desired round bar form. The absence of welded joints or seams along its length gives the seamless bar a smooth and continuous surface. This manufacturing method improves the overall strength and durability of the round bar. In contrast, a turned steel round bar begins as a solid steel bar obtained through casting or hot rolling. The bar undergoes a machining process called turning, where it is rotated against a cutting tool to remove material and achieve the desired dimensions and shape. This turning process results in a round bar with a smooth and polished surface. However, there may be mill marks or slight imperfections due to the machining process, unlike a seamless round bar. Seamless steel round bars are often preferred in industries that require high strength and reliability, such as construction, automotive, and oil and gas. Their uniform structure and absence of welds make them highly resistant to cracking and failure under heavy loads or extreme conditions. On the other hand, turned steel round bars are commonly used in applications where a smooth surface finish is desired, such as decorative pieces or precision components for machinery. In summary, the main difference between a seamless and a turned steel round bar lies in their manufacturing process and resulting characteristics. While both provide a smooth surface finish, seamless round bars offer enhanced strength and reliability due to their seamless structure, whereas turned round bars are often chosen for their precise dimensions and aesthetic qualities.
- Q: What are the different grades of steel round bars available?
- There are various grades of steel round bars available, each with different properties and applications. Some common grades include: 1. Mild Steel: This grade is the most commonly used and affordable option. It has a low carbon content and is easy to weld, cut, and form. Mild steel round bars are suitable for general construction projects, fabrication, and manufacturing. 2. Carbon Steel: With a higher carbon content than mild steel, carbon steel round bars offer greater strength and hardness. They are often used in applications that require high strength, such as machinery parts, shafts, and axles. 3. Alloy Steel: Alloy steel round bars are made by adding various alloying elements such as chromium, nickel, manganese, or molybdenum to improve specific properties. These bars offer enhanced strength, toughness, and wear resistance, making them suitable for applications like automotive parts, gears, and tools. 4. Stainless Steel: Stainless steel round bars are corrosion-resistant and have excellent mechanical properties. They are widely used in industries such as construction, food processing, and medical equipment manufacturing. Different grades of stainless steel, such as 304, 316, or 410, offer varying levels of corrosion resistance and strength. 5. Tool Steel: Tool steel round bars are specifically designed for making tools and dies. They have high hardness, wear resistance, and heat resistance properties. Tool steel grades like D2, A2, or O1 are commonly used for making cutting tools, molds, and dies. It's essential to select the appropriate grade of steel round bars based on the specific requirements of your project, considering factors such as strength, corrosion resistance, hardness, and machinability. Consulting with a steel supplier or an engineer can help identify the most suitable grade for your application.
- Q: Do you need paint for roof lightning proof steel bars?
- The roof lightning protection round steel is the use of metal electrical conductivity and the principle of point discharge, the accumulation of the earth's electricity more rapidly spread to the air, play a role in lightning.
- Q: How do I determine the strength and hardness of a steel round bar?
- To determine the strength and hardness of a steel round bar, there are a few techniques and tests that can be used: 1. Tensile Test: This is the most common method for determining the strength of a steel bar. It involves applying a tensile force to the bar until it breaks, and measuring the maximum force or load it can withstand. This test provides information about the bar's ultimate tensile strength, yield strength, and elongation. 2. Hardness Test: There are several methods to measure the hardness of a steel bar, including the Rockwell, Brinell, and Vickers hardness tests. These tests involve indenting the surface of the bar with a standardized indenter and measuring the resulting indentation size. The hardness value obtained provides an indication of the bar's resistance to deformation and wear. 3. Charpy Impact Test: This test measures the toughness of a steel bar by striking it with a swinging pendulum and measuring the energy absorbed during fracture. It helps determine the ability of the bar to resist brittle fracture under impact loading conditions. 4. Microstructural Analysis: A microscopic examination of the steel bar's microstructure can provide insights into its mechanical properties. By preparing a polished and etched sample and examining it under a microscope, the presence of different phases, grain size, and any structural abnormalities can be observed. Different microstructural features can influence the strength and hardness of the bar. 5. Chemical Composition Analysis: The chemical composition of the steel bar, particularly the carbon content, plays a significant role in determining its strength and hardness. Analyzing the composition using techniques like spectroscopy or chemical analysis can provide valuable information about the bar's mechanical properties. It is important to note that these tests and techniques should be conducted by qualified professionals in a controlled laboratory environment to ensure accurate and reliable results. Additionally, specific standards and specifications may exist for different applications, so consulting relevant standards and guidelines can provide further guidance on determining the strength and hardness of a steel round bar.
- Q: What is the difference between a cold-drawn and a polished steel round bar?
- The manufacturing processes and resulting properties of a cold-drawn steel round bar and a polished steel round bar are different. To produce a cold-drawn steel round bar, a hot-rolled steel bar is pulled or drawn through a die or series of dies at room temperature. This reduces its diameter and increases its length. This process imparts specific 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. In contrast, a polished steel round bar undergoes a different treatment process. Once the steel bar is formed, it undergoes 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 conclusion, the main distinction between a cold-drawn and a polished steel round bar lies in their manufacturing processes and intended applications. Cold-drawn bars go through a precise cold drawing process to enhance their mechanical properties, while polished bars undergo surface polishing for an aesthetically pleasing finish.
- Q: Can steel round bars be used for making staircases?
- Staircases can indeed be made using steel round bars. These bars are widely utilized in the construction sector for various purposes, including the fabrication of staircases. They possess robustness, longevity, and exceptional structural support, rendering them an ideal option for staircases. Steel round bars can be employed to shape and structure the staircase's framework, ensuring stability and safety. Moreover, they can be easily molded and welded to create diverse designs and styles for the staircase, allowing for flexibility and customization during construction. All in all, steel round bars are a dependable and popular choice for constructing staircases due to their strength, durability, and versatility.
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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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