40Cr Steel Round Bar&JIS SCR440& ASTM 5140
- Ref Price:
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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
40Cr Steel Round Bar&JIS SCR440& ASTM 5140
Product Description of 40Cr Steel Round Bar&JIS SCR440& ASTM 5140
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 40Cr Steel Round Bar&JIS SCR440& ASTM 5140
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 40Cr Steel Round Bar&JIS SCR440& ASTM 5140
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 40Cr Steel Round Bar&JIS SCR440& ASTM 5140
Packing and Delivery:
Packing in bundle package, or as customer's requirements.
Delivery Detail: 45 days after receiving the deposit.
Usage and Applications of 40Cr Steel Round Bar&JIS SCR440& ASTM 5140
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: What are the different surface hardness options for steel round bars?
- The different surface hardness options for steel round bars depend on the specific heat treatment processes used. Common options include annealing for softening the steel and improving machinability, normalizing for uniform grain structure and increased strength, quenching and tempering for achieving high hardness and toughness, and case hardening techniques like carburizing or nitriding to create a hard outer layer while maintaining a softer core.
- Q: Can steel round bars be used in the shipbuilding industry?
- Yes, steel round bars can be used in the shipbuilding industry. They are commonly used for various applications such as structural components, supports, and reinforcement due to their strength, durability, and versatility.
- Q: How are steel round bars made?
- Steel round bars are made through a process called hot rolling. It involves heating a large rectangular steel billet until it reaches a malleable temperature. The heated billet is then passed through a series of rolling stands, which progressively reduce its thickness and shape it into a round bar. The first step in the hot rolling process is heating the billet in a furnace at extremely high temperatures, typically around 1200 to 1300 degrees Celsius. This heat makes the steel more pliable and easier to shape. Once the billet is heated, it is fed into a rolling mill. The mill consists of a series of rollers that gradually reduce the thickness and elongate the billet. As the billet passes through each set of rollers, it is squeezed and stretched, gradually forming a round shape. The number of passes through the rolling mill depends on the desired final size and shape of the round bar. During the rolling process, the steel bar is also cooled to prevent overheating and ensure proper metallurgical properties. This can be done through a water spray or air cooling system. After the bar has been shaped and cooled, it is cut into desired lengths. The cut bars are then subjected to further processes such as straightening, surface treatment, and quality testing. These additional steps ensure that the steel round bars meet the required specifications and standards. Overall, the process of making steel round bars involves heating a steel billet, passing it through a series of rolling stands to shape it into a round bar, cooling it, and then cutting it into desired lengths. This process allows for the production of strong and durable round bars that find various applications in industries such as construction, manufacturing, and engineering.
- Q: What are the different types of steel round bar surface treatments?
- Steel round bars can undergo various surface treatments to enhance their appearance, durability, and resistance to corrosion. Some commonly used treatments are: 1. Hot-dip galvanizing: Immerse the steel round bar in molten zinc to create a protective zinc coating, preventing rust and corrosion. Ideal for outdoor applications. 2. Electroplating: Apply a layer of another metal, like chrome or nickel, to the steel round bar. Improves appearance and corrosion resistance. 3. Powder coating: Electrostatically apply a dry powder to the surface, then cure it under heat. Creates a hard, durable, and attractive finish resistant to chipping, scratching, and fading. 4. Passivation: Chemically remove impurities from the surface, leaving a clean and corrosion-resistant layer. Commonly used for enhancing rust resistance in stainless steel bars. 5. Black oxide coating: Form a thin layer of black iron oxide on the surface. Provides mild corrosion resistance and a sleek black appearance. 6. Shot blasting: Propel abrasive materials at high speeds onto the surface to remove impurities or scale. Improves appearance and promotes better coating adhesion. 7. Acid pickling: Immerse the bar in an acid bath to remove scale and impurities, leaving a clean surface free from contaminants. These treatments are just a few examples of what can be done to steel round bars. The choice depends on factors such as the bar's intended use, desired appearance, and required corrosion resistance level.
- Q: How do steel round bars compare to plastic round bars?
- Steel round bars are generally stronger and more durable compared to plastic round bars. Steel has a higher tensile strength and can withstand heavier loads, making it suitable for applications that require high-strength materials. On the other hand, plastic round bars are lighter and more flexible, making them more suitable for certain applications where weight and flexibility are important factors.
- Q: Can steel round bars be used for making camshafts?
- Yes, steel round bars can be used for making camshafts. Steel is a commonly used material due to its strength, durability, and heat resistance properties, which are essential for camshaft applications. Additionally, steel round bars can be easily machined and shaped into the desired camshaft design.
- Q: How do steel round bars perform under fatigue loading?
- Steel round bars typically perform well under fatigue loading due to their high strength and durability. The round shape helps distribute stress evenly, reducing the likelihood of fatigue failure. Additionally, steel has a good fatigue resistance, allowing it to withstand repeated loading and unloading cycles without significant degradation in performance.
- Q: How are steel round bars used in the construction of transmission towers?
- Steel round bars are used in the construction of transmission towers as a primary structural component. They provide strength and stability to the tower, supporting the weight of the transmission lines and withstanding the forces of wind and other environmental factors. The round bars are typically used in the fabrication of the tower's vertical members, such as the main columns and bracing, ensuring the tower's durability and ability to transmit electrical power efficiently.
- Q: What is the typical hardness of a steel round bar?
- The typical hardness of a steel round bar can vary depending on the specific grade and composition of the steel. However, most steel round bars have a typical hardness ranging from 20 to 60 HRC (Rockwell Hardness Scale).
- Q: Can steel round bars be bent or shaped?
- Yes, steel round bars can be bent or shaped. Steel is a highly malleable material that can undergo various forming processes to achieve desired shapes. It can be bent using methods such as hot bending, cold bending, or induction bending. The bending process involves applying force to the steel bar, causing it to deform and take on the desired shape. Additionally, steel round bars can also be shaped through machining processes such as turning, drilling, milling, or grinding. These processes allow for the creation of various profiles, including cylindrical, square, or hexagonal shapes, among others. Overall, steel round bars offer flexibility in terms of bending and shaping, making them versatile for use in a wide range of applications.
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40Cr Steel Round Bar&JIS SCR440& ASTM 5140
- 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
OKorder Financial Service
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