Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 50000 m.t./month
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Item specifice
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:
16-300mm
Length:
6-12m
Net Weight:
2mt
Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
Product Description of Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
1. Steel grade: 20MnCr5
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 Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
Material | 20CrMnTi | 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 Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
C | Si | Mn | Cr | Ni | Cu |
0.42~0.47 | 0.17~0.37 | 0.35~0.65 | ≤0.25 | ≤0.30 | ≤0.25 |
Photo Show of Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
Packing and Delivery:
Packing in bundle package, or as customer's requirements.
Delivery Detail: 45 days after receiving the deposit.
Usage and Applications of Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
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 in the manufacturing of architectural features?
- Steel round bars are a valuable resource in the production of architectural features. With their versatility and strength, they are well-suited for a variety of applications within the construction industry, particularly in the creation of architectural features. These bars can be utilized to construct both structural and decorative elements, such as columns, beams, supports, stair railings, balustrades, and ornamental sculptures. Due to their durability, stability, and resistance to corrosion, steel round bars are an excellent choice for architectural features that must endure the test of time and harsh environmental conditions. Moreover, these bars can be easily manipulated and shaped into various designs, enabling architects to exercise their creativity and personalize their architectural projects.
- Q:What are the different types of steel round bars used in the manufacturing of springs?
- There are several different types of steel round bars commonly used in the manufacturing of springs. These include: 1. Carbon steel round bars: These are the most commonly used type of steel for springs. They have a high carbon content, typically ranging from 0.60% to 0.95%. Carbon steel round bars offer good strength and durability, making them suitable for a wide range of spring applications. 2. Alloy steel round bars: These are made by adding alloying elements such as chromium, manganese, nickel, or vanadium to carbon steel. Alloy steel round bars provide enhanced mechanical properties, including higher strength, toughness, and resistance to wear and corrosion. They are often used in heavy-duty or high-performance spring applications. 3. Stainless steel round bars: These are corrosion-resistant steel bars with a high chromium content (usually above 10.5%). Stainless steel round bars are popular for springs that require excellent resistance to rust, oxidation, and chemicals. They are commonly used in applications where hygiene, cleanliness, and aesthetic appeal are important, such as in the food and medical industries. 4. Spring steel round bars: These are specifically designed for spring manufacturing. They have a unique combination of properties, including high yield strength, good fatigue resistance, and excellent elasticity. Spring steel round bars are typically made from either carbon steel or alloy steel, depending on the specific requirements of the application. It is important to choose the right type of steel round bar based on factors such as the intended application, load requirements, environmental conditions, and desired spring performance. Consulting with a materials engineer or spring manufacturer can help determine the most suitable steel round bar for a specific spring manufacturing project.
- Q:What are the different types of steel round bar surface treatments for improved hardness?
- There are several different types of steel round bar surface treatments that can be used to improve hardness. These treatments are designed to enhance the strength and durability of the steel, making it more resistant to wear and tear. Some of the common surface treatments for improved hardness include: 1. Heat Treatment: This is a widely used method where the steel round bar is heated to a specific temperature and then cooled rapidly to alter its microstructure. This process can increase the hardness of the steel, making it suitable for applications that require high strength and toughness. 2. Nitriding: Nitriding involves exposing the steel round bar to a nitrogen-rich environment at high temperatures. This treatment forms a hard layer of nitrides on the surface of the steel, enhancing its hardness, wear resistance, and fatigue life. 3. Carbonitriding: Similar to nitriding, carbonitriding involves introducing both carbon and nitrogen into the steel round bar's surface. This treatment creates a hard and wear-resistant layer while maintaining a tough core. Carbonitriding is commonly used for applications that require a combination of hardness and toughness. 4. Induction Hardening: In this process, the steel round bar is heated through electromagnetic induction and then rapidly cooled. This treatment selectively hardens the surface of the steel, leaving the core relatively unaffected. Induction hardening is effective in improving the hardness and wear resistance of specific areas, such as gears or shafts. 5. Chroming: Chrome plating is a surface treatment method where a layer of chromium is deposited onto the steel round bar's surface. This treatment provides excellent hardness, corrosion resistance, and wear resistance. Chroming is commonly used for applications exposed to harsh environments or for parts that require a smooth and hard surface. 6. Shot Peening: Shot peening involves bombarding the steel round bar's surface with tiny metal or ceramic particles at high speed. This treatment induces compressive stress, which improves the material's hardness, fatigue strength, and resistance to crack initiation and propagation. It is important to note that the choice of surface treatment for improved hardness depends on the specific requirements of the application, the type of steel used, and the desired mechanical properties. Consulting with a materials engineer or specialist is recommended to determine the most suitable treatment for a particular steel round bar.
- Q:How do I determine the strength and hardness of a steel round bar?
- In order to assess the strength and hardness of a steel round bar, various methods and tests can be employed: 1. Tensile Test: The strength of a steel bar is commonly determined through this method. It involves subjecting the bar to a tensile force until it fractures, and measuring the maximum force or load it can endure. This test provides information on the bar's ultimate tensile strength, yield strength, and elongation. 2. Hardness Test: Several techniques, such as the Rockwell, Brinell, and Vickers hardness tests, can be utilized to measure the hardness of a steel bar. These tests entail indenting the bar's surface using a standardized indenter and gauging the resulting indentation size. The obtained hardness value indicates the bar's resistance to deformation and wear. 3. Charpy Impact Test: This test gauges the toughness of a steel bar by striking it with a swinging pendulum and measuring the energy absorbed during fracture. It helps assess the bar's ability to withstand brittle fracture under conditions of impact loading. 4. Microstructural Analysis: Examining the microstructure of the steel bar through microscopic observation can offer insights into its mechanical properties. By preparing a polished and etched sample and inspecting it under a microscope, the presence of different phases, grain size, and any structural irregularities can be observed. Various microstructural features can impact the bar's strength and hardness. 5. Chemical Composition Analysis: The chemical composition of the steel bar, particularly the carbon content, significantly influences 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 should be emphasized that these tests and techniques must be carried out by qualified professionals in a controlled laboratory setting to ensure accurate and reliable results. Moreover, specific standards and specifications may exist for different applications, so referring to relevant standards and guidelines can offer further guidance on determining the strength and hardness of a steel round bar.
- Q:Why is the round bar bent?
- Gripping force: generally expressed by the strength of the concrete.Physical quantity of reinforced concrete to resist sliding ability, its sliding force divided by the holding area to express (Mpa), under normal circumstances, the bond strength is along the steel and concrete interface shear stress, which is the bond stress.
- Q:How do I calculate the length of a steel round bar based on weight?
- In order to determine the length of a steel round bar based on its weight, there are a few factors to consider. Firstly, you must be aware of the density of steel, which typically ranges around 7850 kilograms per cubic meter. However, it's worth noting that this value can vary depending on the specific type and grade of steel being utilized. After obtaining the density value, the next step involves converting the weight of the steel round bar into kilograms if it is initially given in a different unit. For instance, if the weight is provided in pounds, you can multiply it by 0.4536 to convert it into kilograms. Once you have successfully converted the weight into kilograms, you can proceed with using the following formula to calculate the length: Length = Weight / (Density * π * (Diameter/2)^2) It's important to ensure that the diameter is measured in meters. If the diameter is given in a different unit, it must be converted accordingly. Additionally, the symbol "π" represents the mathematical constant pi, which is approximately equal to 3.14159. By substituting the appropriate values into the formula, you will be able to accurately determine the length of the steel round bar. Remember to maintain consistent units throughout the calculation to yield precise results. Please bear in mind that this calculation assumes the round bar possesses a consistent diameter along its entire length. If the bar exhibits varying diameters or irregularities, the resulting length may be an approximation rather than an exact measurement.
- Q:Can steel round bars be used for making steering linkages?
- Yes, steel round bars can be used for making steering linkages. Steel round bars are commonly used in various applications, including automotive and mechanical engineering, due to their high strength, durability, and resistance to wear and tear. Steering linkages are critical components in a vehicle's steering system, responsible for transmitting steering input from the steering wheel to the wheels. The use of steel round bars provides the necessary strength and rigidity required to ensure efficient and reliable steering performance. However, it is important to consider other factors such as the specific design requirements, weight considerations, and the desired level of flexibility or torsional properties when selecting the appropriate type and size of steel round bar for steering linkages.
- Q:How do you measure the surface roughness of a steel round bar?
- To measure the surface roughness of a steel round bar, there are several methods available. One commonly used technique is the use of a profilometer or surface roughness tester. First, ensure that the steel round bar is cleaned and free from any contaminants. Then, place the round bar on a stable surface and set up the profilometer according to the manufacturer's instructions. Next, calibrate the profilometer using a known reference standard with a defined surface roughness value. This calibration will ensure accurate measurements. Once the instrument is calibrated, gently run the profilometer stylus or probe along the length of the steel round bar's surface. The stylus will detect the variations in height and depth of the surface, providing a profile of the roughness. The profilometer will provide readings in various parameters, such as Ra (average roughness), Rz (mean roughness depth), Rq (root mean square roughness), etc. These parameters quantify the roughness characteristics of the steel round bar's surface. It is important to take multiple readings at different locations along the round bar to obtain a representative average roughness value. This will account for any localized variations in surface roughness. Additionally, it is crucial to consider the appropriate cutoff length or evaluation length, as it affects the measured roughness value. The cutoff length defines the distance over which the surface profile is evaluated, excluding any irregularities smaller than the specified cutoff value. Overall, using a profilometer is an effective method to measure the surface roughness of a steel round bar, providing valuable information for quality control, manufacturing processes, and various applications where surface finish is critical.
- Q:What are the advantages of using chromium-molybdenum alloy steel round bars?
- One of the main advantages of using chromium-molybdenum alloy steel round bars is their superior strength and durability. This type of alloy steel has excellent tensile strength and high resistance to wear and corrosion, making it ideal for various applications that require a strong and long-lasting material. Additionally, chromium-molybdenum alloy steel round bars offer good heat resistance, making them suitable for use in high-temperature environments. Overall, these bars provide a reliable and cost-effective solution for industries such as construction, automotive, and manufacturing.
- Q:Can steel round bars be extruded?
- No, steel round bars cannot be extruded. Extrusion is a manufacturing process that involves forcing material through a die to create a specific shape or profile. While steel can be extruded into various shapes, such as tubes, channels, or angles, round bars are typically not produced by extrusion. Instead, steel round bars are usually made through a different process called hot rolling, where a cylindrical billet is heated and passed through a series of rollers to achieve the desired diameter and length.
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Gear Steel Round Bars SCM420H SCM440H SCr420H 20MnCr5
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 50000 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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