Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
- Ref Price:
-
- 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
Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
Product Description of Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
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 Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
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 Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
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 Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
Packing and Delivery:
Packing in bundle package, or as customer's requirements.
Delivery Detail: 45 days after receiving the deposit.
Usage and Applications of Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
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.
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: Can steel round bars be used for making connecting rods?
- Yes, steel round bars can be used for making connecting rods. Steel is a commonly used material for connecting rods due to its high strength and durability, making it suitable for withstanding the stress and load requirements of an engine.
- Q: What are the different types of steel round bar surface treatments used in the aerospace industry?
- The aerospace industry utilizes various surface treatments for steel round bars to enhance performance and durability. These treatments are carefully designed to meet the industry's strict standards. Some commonly employed treatments in the aerospace industry are as follows: 1. Passivation: This treatment eliminates iron particles and contaminants from the steel round bar's surface. It prevents corrosion and enhances the material's overall corrosion resistance. 2. Shot Peening: Shot peening involves bombarding the steel round bar's surface with small metallic shots. This treatment induces compressive stress on the surface, thereby improving the material's fatigue strength and resistance to stress corrosion cracking. 3. Electroplating: Electroplating is a widely used surface treatment in the aerospace industry. It involves depositing a layer of metallic coating onto the steel round bar through an electrochemical process. This treatment enhances corrosion resistance, wear resistance, and aesthetic appearance. 4. Anodizing: Anodizing is an electrolytic passivation process commonly employed for aluminum alloys, but it can also be used for steel round bars. This treatment forms a thick, durable, and corrosion-resistant oxide layer on the surface, improving resistance to wear, corrosion, and scratching. 5. Nitriding: Nitriding is a surface hardening treatment that involves diffusing nitrogen into the steel round bar's surface. This treatment enhances surface hardness, wear resistance, and fatigue strength. 6. Chemical Conversion Coating: Chemical conversion coating forms a thin, protective layer on the steel round bar's surface. This coating enhances corrosion resistance and provides a suitable base for subsequent paint or coating applications. These examples demonstrate some of the various steel round bar surface treatments employed in the aerospace industry. Each treatment offers distinct advantages and is selected based on specific application requirements, including corrosion resistance, wear resistance, fatigue strength, and aesthetic appearance.
- Q: Can steel round bars be used in the packaging industry?
- Yes, steel round bars can be used in the packaging industry. They are commonly used for constructing pallets, crates, and other packaging materials that require strength, durability, and load-bearing capacity. Steel round bars provide a robust and reliable solution for packaging heavy and bulky items, ensuring safe transportation and storage.
- Q: Are steel round bars susceptible to corrosion?
- Corrosion is a common issue for steel round bars, especially when they come into contact with moisture, oxygen, and certain chemicals. The degradation of the material occurs when the metal reacts with its surroundings. Steel, primarily composed of iron, can undergo different types of corrosion, including general corrosion, pitting corrosion, and stress corrosion cracking. When steel round bars are exposed to moisture and oxygen, they can experience general corrosion. This gradual deterioration manifests as the formation of an oxide layer on the surface, resulting in material loss and reduced strength over time. Pitting corrosion is another type that steel round bars may encounter. It involves localized damage on the metal's surface, leading to the creation of small pits. These pits can deepen and expand, compromising the structure and integrity of the bars. Stress corrosion cracking is a specific form of corrosion that affects steel round bars under tensile stress, in the presence of particular corrosive agents. This phenomenon can cause sudden material failure, even when stress levels are below the bars' yield strength. To combat corrosion, protective coatings and corrosion inhibitors are commonly applied to steel round bars. Methods like galvanization, where a layer of zinc is added, or the use of epoxy or paint coatings are often employed. Regular maintenance and proper storage practices are also important in preventing excessive exposure to corrosive elements. It is worth noting that the susceptibility to corrosion can vary depending on the grade and composition of the steel used for the round bars. Certain types of stainless steel, for instance, exhibit higher resistance to corrosion due to the presence of chromium and other alloying elements. In conclusion, while steel round bars can be vulnerable to corrosion, appropriate preventive measures can be implemented to minimize the risk and prolong their lifespan.
- Q: What are the different finishes available for steel round bars?
- There are several different finishes available for steel round bars, each of which serves a specific purpose and provides distinct benefits. Some of the most common finishes include: 1. Hot Rolled: This finish is achieved by heating the steel above its recrystallization temperature and then rapidly cooling it. It results in a rough, scaly surface texture that provides excellent corrosion resistance and durability. 2. Cold Rolled: In this process, the steel is rolled at room temperature, resulting in a smooth and polished finish. Cold rolled steel round bars are known for their precise dimensions, tight tolerances, and improved surface finish. 3. Bright Drawn: This finish involves subjecting the steel round bars to a drawing process, where they are pulled through a die to achieve the desired shape and size. It leaves the surface smooth, bright, and free from any imperfections or defects. 4. Polished: Polishing is typically done after the steel round bars have been cold rolled or drawn. It involves using abrasive materials or chemical treatments to remove any surface imperfections and create a highly reflective finish. Polished steel round bars are often used in decorative applications. 5. Ground: Grinding is a process where the steel round bars are subjected to abrasive wheels to remove any surface imperfections or irregularities. It results in a smooth and even finish, making the bars suitable for applications where tight tolerances and uniformity are required. 6. Galvanized: Galvanizing is a coating process where the steel round bars are dipped in a bath of molten zinc. This creates a protective layer that prevents corrosion and increases the lifespan of the bars, making them suitable for outdoor applications or environments with high humidity or moisture. These different finishes offer a range of properties and appearances, allowing steel round bars to be used in various industries and applications such as construction, automotive, manufacturing, and engineering. It is important to consider the specific requirements and conditions of the intended use when selecting the appropriate finish for steel round bars.
- Q: What are the advantages of using cobalt-alloy steel round bars?
- Using cobalt-alloy steel round bars in various industries and applications offers several advantages. Firstly, this type of steel is exceptionally strong and hard, providing resistance against wear, corrosion, and high temperatures. This makes it suitable for demanding environments where other materials would quickly degrade. Secondly, cobalt-alloy steel maintains its shape and size even under extreme conditions, demonstrating excellent dimensional stability. This makes it ideal for applications that require precise tolerances and minimal deformation, such as in the aerospace and automotive industries. Moreover, cobalt-alloy steel retains its mechanical properties at elevated temperatures, showcasing excellent heat resistance. This makes it valuable in applications involving high-speed machining, cutting tools, and turbine components. Additionally, cobalt-alloy steel round bars are easily machined and fabricated, offering versatility and customization in various applications. Their high machinability and weldability make them suitable for use in manufacturing processes like forging, casting, and machining. Furthermore, cobalt-alloy steel round bars exhibit excellent fatigue resistance, ensuring long-lasting performance and durability. This makes them suitable for applications involving repetitive stress or cyclic loading, such as shafts, springs, and fasteners. Lastly, cobalt-alloy steel is biocompatible, making it suitable for medical and dental applications. Its corrosion resistance and biocompatibility properties make it commonly used in orthopedic implants, surgical tools, and dental instruments. In conclusion, the advantages of using cobalt-alloy steel round bars include exceptional strength, hardness, and dimensional stability, as well as heat resistance, machinability, fatigue resistance, and biocompatibility. These qualities make them valuable across a wide range of industries and applications, offering reliability, durability, and performance.
- Q: What are the different types of steel round bars used in the manufacturing of bearings?
- There are several different types of steel round bars used in the manufacturing of bearings. The specific type of steel used will depend on various factors, such as the application, load capacity, and desired performance characteristics of the bearing. One commonly used type of steel for manufacturing bearings is through-hardened steel. This type of steel is heat-treated to achieve a uniform hardness throughout the entire bar. Through-hardened steel round bars provide excellent strength and wear resistance, making them suitable for high-load bearing applications. Another type of steel that is frequently used in bearing manufacturing is case-hardened steel. This steel is hardened only on the surface, while the core remains relatively soft. Case-hardened steel round bars offer a combination of high surface hardness for wear resistance and a softer core for improved toughness and impact resistance. Stainless steel is also utilized in the production of bearings, particularly in applications that require corrosion resistance or operate in harsh environments. Stainless steel round bars have excellent resistance to rust and corrosion, making them ideal for use in marine or chemical industries. Furthermore, alloy steel round bars are commonly employed in bearing manufacturing. These steels are made by adding various alloying elements, such as chromium, molybdenum, or nickel, to enhance specific properties like hardness, toughness, or heat resistance. Alloy steel round bars are often used in specialized bearing applications that require exceptional performance under high temperatures or extreme conditions. In summary, the different types of steel round bars used in bearing manufacturing include through-hardened steel, case-hardened steel, stainless steel, and alloy steel. Each type offers unique properties and characteristics that make them suitable for specific bearing applications.
- Q: What is the weight of a steel round bar?
- The weight of a steel round bar can vary depending on its dimensions and the type of steel used. Generally, the weight of a steel round bar can be calculated by multiplying its volume (pi times the square of the radius times the length) by the density of the steel.
- Q: How do you determine the strength and hardness of a steel round bar?
- The strength and hardness of a steel round bar can be determined through various testing methods, such as tensile testing and hardness testing. Tensile testing involves subjecting the steel bar to a controlled pulling force until it fractures, allowing measurement of its ultimate tensile strength and yield strength. Hardness testing, on the other hand, measures the material's resistance to indentation or scratching using methods like Rockwell or Brinell hardness tests. These tests provide quantitative values that help determine the strength and hardness of the steel round bar.
- Q: What are the different types of steel round bar surface finishes for improved lubricity?
- There are several different types of steel round bar surface finishes that can be used to improve lubricity. 1. Smooth Finish: This is the most basic type of finish, where the surface of the round bar is made smooth through processes like grinding or polishing. A smooth finish helps to reduce friction and provides a good base for applying lubricants. 2. Chrome Plating: Chrome plating involves electroplating a layer of chromium onto the surface of the round bar. This creates a hard, smooth, and corrosion-resistant surface that provides excellent lubricity. Chrome plating is commonly used in applications where low friction and wear resistance are required. 3. Nitriding: Nitriding is a surface hardening process that involves diffusing nitrogen into the surface of the round bar. This creates a hard layer that enhances the lubricity of the steel. Nitriding is often used in applications where high wear resistance and improved lubrication are important. 4. Black Oxide: Black oxide is a chemical conversion coating that forms a black surface on the steel round bar. This finish provides a thin layer of protection against corrosion and also improves lubricity. Black oxide is commonly used in applications where lubricity is essential but a decorative appearance is not required. 5. Teflon Coating: Teflon coating, also known as PTFE (polytetrafluoroethylene) coating, involves applying a thin layer of Teflon onto the surface of the round bar. This coating provides excellent lubricity and low friction properties. Teflon coating is often used in applications where non-stick properties are required, such as in food processing or packaging industries. These are just a few examples of the different types of steel round bar surface finishes that can be used to improve lubricity. The choice of finish depends on the specific application requirements and the desired level of lubrication and wear resistance.
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Forged GB/AISI/JIS Standard 4130 1.7218 SCM430 25CrMo4 Half Round Steel Bar
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 500000 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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