SCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 Steel
- 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
SCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 Steels
1. Dia:12mm-300mm
2. Standard Performed: ASTM A29/A29M-04
3. Equal Standard:
America Standard: AISI4140
International Standard: 42CrMo4
Japan Standard: SCM440
Germany Standard: 42CrMo4
4. Chemical composition:
Grade | C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Al |
AISI4140 | 0.38 0.41 | 0.15 0.35 | 0.85 1.00 | Max 0.015 | Max 0.040 | Max 0.25 | 0.80 1.10 | 0.15 0.25 | Max 0.35 | 0.012 0.030 |
5. Grade: ASTM A29 4140 42CrMo SCM440
Hardness:217HB
Tensile strength:1080(110)MPA
Yield strength: 930(95)MPA
Elogation: 12%
Reduction of area: 45%
AKV(impact value): 63J
- Q: How do steel round bars perform under static or stationary loads?
- Steel round bars perform exceptionally well under static or stationary loads. Due to their high tensile and compressive strength, they can withstand heavy loads without significant deformation or failure. The structural integrity and stability of steel round bars make them a reliable choice for various applications where static or stationary loads are involved.
- Q: What are the different heat treatment processes used for steel round bars?
- Steel round bars can undergo several heat treatment processes to enhance their mechanical properties and overall performance. These processes include annealing, normalizing, quenching, tempering, and case hardening. 1. Annealing involves heating the steel round bars to a specific temperature and then slowly cooling it to relieve internal stresses and improve ductility. It also refines the grain structure, making the steel softer and more workable. 2. Normalizing is similar to annealing, but the steel round bars are cooled in still air. This process refines the grain structure and improves mechanical properties like strength and toughness. 3. Quenching is a rapid cooling process where the steel round bars are immersed in a quenching medium such as oil, water, or polymer. It achieves high hardness and strength by transforming the steel's microstructure into martensite. However, it can also make the steel more brittle, so tempering is often done afterward. 4. Tempering involves reheating the quenched steel round bars to a specific temperature and then slowly cooling it. This process reduces the brittleness caused by quenching and improves toughness and ductility. The temperature and duration of tempering can be adjusted for desired mechanical properties. 5. Case hardening is a surface heat treatment process that increases hardness and wear resistance. Carbon or other alloying elements are introduced to the steel's surface, which is then heated to a specific temperature. This creates a hardened outer layer while maintaining a tough core. These heat treatment processes offer steel round bars a wide range of mechanical properties and performance characteristics, making them suitable for various applications in industries like automotive, construction, manufacturing, and aerospace. The choice of specific heat treatment process depends on desired properties, steel composition, and intended application of the round bars.
- Q: How do you calculate the maximum allowable stress for a steel round bar?
- To calculate the maximum stress that a steel round bar can bear without deforming or failing, several considerations must be made. 1. Material properties must be determined: Steel round bars have various grades, each with its own distinct material properties. These properties, such as ultimate tensile strength (UTS), yield strength, and elongation percentage, can usually be found in material specification documents or reference books. 2. The design factor should be identified: The design factor, also referred to as the safety factor or factor of safety, is a multiplier applied to the maximum stress to ensure the safety and capacity of the structure or component when subjected to unexpected or dynamic loads. The design factor can differ depending on the application and industry standards, typically ranging between 1.5 and 4. 3. The allowable stress needs to be calculated: The allowable stress is determined by dividing the yield strength of the material by the design factor. This calculation ensures that the structure or component remains within a safe stress range. The formula can be expressed as: Allowable Stress = Yield Strength / Design Factor. For instance, if a steel round bar has a yield strength of 300 MPa and a design factor of 2, the maximum allowable stress would be 150 MPa (300 MPa / 2). This implies that the steel round bar can safely endure a maximum stress of 150 MPa before the risk of deformation or failure arises. It is vital to note that the maximum allowable stress is just one aspect of designing a structure or component. Other factors, including fatigue, environmental conditions, and load distribution, should also be considered to ensure a secure and dependable design. Seeking guidance from relevant engineering codes, standards, and professionals is highly recommended when calculating the maximum allowable stress for a specific application.
- Q: Can steel round bars be used in the manufacturing of pressure vessels?
- Yes, steel round bars can be used in the manufacturing of pressure vessels. Steel round bars offer high strength and durability, making them suitable for withstanding the high pressure environment inside pressure vessels. Additionally, steel round bars can be easily fabricated and welded, allowing for the construction of complex pressure vessel designs.
- Q: Can steel round bars be bent or formed?
- Yes, steel round bars can be bent or formed. They have the ability to be shaped into various angles or curves through the application of force, typically using tools such as a hydraulic press or bending machine.
- Q: Can steel round bars be used for making exercise equipment?
- Yes, steel round bars can be used for making exercise equipment. Steel is a strong and durable material, making it suitable for constructing various types of exercise equipment such as barbells, weight plates, and dumbbells. The round shape of the bars also allows for easy grip and handling during workouts.
- Q: Are steel round bars suitable for architectural applications?
- Yes, steel round bars are suitable for architectural applications. Steel is a versatile and durable material that is commonly used in construction and architectural projects. Steel round bars offer several benefits for architectural applications. Firstly, steel round bars are known for their strength and load-bearing capacity. They have excellent tensile strength and can withstand heavy loads, making them suitable for applications where structural integrity is crucial. Whether used as support beams, columns, or in other structural elements, steel round bars offer a reliable and long-lasting solution. Additionally, steel round bars are highly resistant to corrosion and fire, which is essential for architectural applications. They can withstand harsh weather conditions, including extreme temperatures, without compromising their structural integrity. This resistance to corrosion and fire makes steel round bars a safe and reliable choice for architectural projects. Furthermore, steel round bars can be easily fabricated and customized to meet specific design requirements. They can be cut, welded, bent, and shaped into various forms, allowing architects and designers to create unique and innovative structures. The versatility of steel round bars makes them suitable for a wide range of architectural applications, including bridges, stadiums, and high-rise buildings. Moreover, steel round bars are cost-effective compared to some other building materials. They have a longer lifespan and require minimal maintenance, reducing the overall lifecycle costs of a project. This cost-effectiveness, combined with their durability and versatility, makes steel round bars a popular choice in architectural applications. In conclusion, steel round bars are indeed suitable for architectural applications. Their strength, resistance to corrosion and fire, ease of fabrication, and cost-effectiveness make them an ideal choice for a wide range of architectural projects. Whether used for structural elements or decorative purposes, steel round bars offer a reliable and aesthetically pleasing solution for architects and designers.
- Q: How do steel round bars compare to wrought iron bars?
- Steel round bars and wrought iron bars have several differences that set them apart. Firstly, steel round bars are made from an alloy of iron and carbon, whereas wrought iron bars are composed of pure iron with a low carbon content. This difference in composition leads to varying properties. Steel round bars are known for their strength and durability, making them suitable for a wide range of applications, including construction, manufacturing, and engineering. On the other hand, wrought iron bars are softer and more malleable, allowing them to be easily shaped and formed into intricate designs. This characteristic makes wrought iron bars popular in decorative applications such as gates, fences, and ornamental pieces. Another difference lies in their manufacturing processes. Steel round bars are typically produced through hot rolling, which involves heating the steel billet and passing it through a series of rollers to shape it into the desired round bar form. In contrast, wrought iron bars are made through a labor-intensive process called blacksmithing. This involves heating the iron and repeatedly hammering it to remove impurities and create a fibrous structure, resulting in its characteristic grainy appearance. In terms of cost, steel round bars are generally more affordable compared to wrought iron bars. The manufacturing process for steel is more streamlined and efficient, leading to lower production costs. Wrought iron bars, on the other hand, require more time and labor, making them more expensive. Finally, when it comes to corrosion resistance, steel round bars have an advantage. Steel can be further alloyed with elements such as chromium, nickel, and molybdenum to enhance its resistance to rust and corrosion. This makes steel round bars suitable for outdoor applications where they may be exposed to moisture and harsh environmental conditions. Wrought iron bars, although they possess some level of corrosion resistance, are more prone to rusting and require regular maintenance to prevent deterioration. In conclusion, steel round bars and wrought iron bars differ in terms of composition, strength, manufacturing process, cost, and corrosion resistance. The choice between the two will depend on the specific requirements of the application, with steel round bars being favored for their strength and affordability, while wrought iron bars are often chosen for their malleability and decorative appeal.
- Q: What are the different types of steel round bars used in the automotive engine components?
- There are several types of steel round bars used in automotive engine components, including carbon steel, alloy steel, stainless steel, and tool steel. Each type of steel offers different properties and characteristics that make them suitable for specific engine components, such as crankshafts, camshafts, connecting rods, and valves. Carbon steel is commonly used for its strength and affordability, while alloy steel provides enhanced strength and resistance to wear and tear. Stainless steel offers excellent corrosion resistance, making it suitable for components exposed to high temperatures and harsh environments. Tool steel, on the other hand, is often used for specialized engine components that require high hardness and toughness, such as cutting tools and dies.
- Q: What are the different surface treatments for steel round bars?
- There are several different surface treatments available for steel round bars, each serving a specific purpose and providing unique benefits. Some of the most common surface treatments for steel round bars include: 1. Hot-dip galvanizing: This process involves immersing the steel round bars in a bath of molten zinc, which creates a protective coating that helps prevent corrosion and rusting. Hot-dip galvanizing is an effective treatment for steel round bars used in outdoor or corrosive environments. 2. Painting: Applying a coat of paint to the surface of steel round bars not only enhances their appearance but also provides a protective barrier against moisture and oxidation. Painting is commonly used for decorative purposes or when a specific color is desired. 3. Powder coating: Powder coating involves applying a dry powder to the steel round bars, which is then cured under heat to form a durable and attractive finish. This treatment offers excellent resistance to impact, chemicals, and UV rays, making it suitable for various applications. 4. Electropolishing: This process uses an electric current and an electrolyte solution to remove a thin layer of the steel round bars' surface, resulting in a smooth and shiny finish. Electropolishing improves the appearance and corrosion resistance of the steel, making it ideal for applications that require a high level of cleanliness and aesthetics. 5. Passivation: Passivation involves treating the steel round bars with an acid solution to remove any free iron or iron oxide from the surface, thus enhancing their corrosion resistance. Passivation is commonly used for stainless steel round bars to increase their longevity and prevent staining or rusting. 6. Shot blasting: Shot blasting is a mechanical surface treatment that involves bombarding the steel round bars with small steel balls or particles at high velocity. This process removes any surface contaminants, scale, or rust, resulting in a clean and roughened surface that improves adhesion for subsequent coatings or treatments. 7. Chrome plating: Chrome plating is a technique where a thin layer of chromium is electroplated onto the surface of steel round bars. This treatment provides excellent corrosion resistance, wear resistance, and a shiny appearance, making it suitable for applications that require durability and aesthetics. Overall, the choice of surface treatment for steel round bars depends on the specific requirements of the application, such as corrosion resistance, aesthetics, or wear resistance. It is important to carefully consider the intended use and environmental conditions before selecting the most appropriate surface treatment for steel round bars.
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SCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 Steel
- 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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