Hot Forged QT AISI 4140 Alloy Steel Round Bar
- 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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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,BV,IBR,RoHS,CE,API,BSI,UL
Thickness:
16-300mm
Length:
6m-12m
Net Weight:
2mt
Hot Forged QT AISI 4140 Alloy Steel Round Bar
Product Description of Hot Forged QT AISI 4140 Alloy Steel Round 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 Hot Forged QT AISI 4140 Alloy Steel Round Bar
Material | ASTM4140 | 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 Hot Forged QT AISI 4140 Alloy Steel Round 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 Hot Forged QT AISI 4140 Alloy Steel Round 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 Hot Forged QT AISI 4140 Alloy Steel Round 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: What are the typical dimensions of a steel round bar?
- The typical dimensions of a steel round bar vary depending on the intended application and industry standards. However, common sizes range from 1/4 inch to 12 inches in diameter, with lengths usually ranging from 10 to 20 feet.
- Q: What are the standard sizes for steel round bars?
- Steel round bars come in various standard sizes, which differ depending on the industry and application at hand. Examples of frequently used standard sizes are 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch, 1 inch, 1 1/4 inch, 1 1/2 inch, 1 3/4 inch, 2 inch, 2 1/2 inch, 3 inch, 3 1/2 inch, 4 inch, 4 1/2 inch, 5 inch, 5 1/2 inch, 6 inch, 7 inch, 8 inch, 9 inch, 10 inch, 11 inch, 12 inch, and so forth. These sizes are commonly employed in the construction, manufacturing, and engineering sectors, with slight variations depending on the country or region. It is important to acknowledge that steel round bars can also be customized to specific sizes and lengths in order to meet the particular requirements of a given project.
- Q: What is the difference between a centerless ground and a cold finished steel round bar?
- A centerless ground steel round bar is produced by grinding the surface of the bar to achieve a precise diameter and smooth finish, while a cold finished steel round bar is produced by cold drawing the bar through a die to achieve the desired shape and size without any additional surface treatment. The centerless ground bar has tighter tolerances and a smoother surface, making it suitable for applications that require high precision and a polished appearance. On the other hand, the cold finished bar may have slightly looser tolerances and a rougher surface, but it is more cost-effective and suitable for applications that do not require extreme precision or a polished finish.
- Q: Can steel round bars be used in the power generation industry?
- Yes, steel round bars can be used in the power generation industry. Steel round bars are commonly used in the construction of power generation equipment and infrastructure due to their high strength and durability. They are often utilized in the fabrication of turbine shafts, generator rotors, gears, and other components that require high load carrying capacity and resistance to wear and fatigue. Additionally, steel round bars can be easily machined and welded, making them a versatile material for various applications within the power generation industry.
- Q: What are the safety precautions when handling steel round bars?
- When handling steel round bars, there are several important safety precautions that should be followed to minimize the risk of accidents or injuries. 1. Personal Protective Equipment (PPE): Always wear appropriate PPE such as safety goggles, gloves, steel-toed boots, and a hard hat. These protective gears help protect against potential hazards such as flying debris, sharp edges, and heavy objects. 2. Proper Lifting and Carrying Techniques: Steel round bars can be heavy and cumbersome, so it is important to use proper lifting techniques to avoid strain or injury. Lift with your legs, keeping your back straight, and avoid twisting or jerking motions. If the bars are too heavy to lift alone, ask for assistance or use mechanical aids like forklifts or cranes. 3. Secure Storage and Stacking: When storing or stacking steel round bars, ensure they are properly secured and organized. Use appropriate storage racks or A-frames to prevent them from tipping over or falling, which could cause serious injuries. If stacking multiple bars, use spacers or shims to maintain stability. 4. Avoid Sharp Edges: Steel round bars may have sharp edges or burrs, so be cautious when handling them. Wear gloves to protect your hands and avoid dragging or sliding the bars, as this can cause cuts or abrasions. 5. Proper Handling Techniques: When moving steel round bars, always maintain a firm grip and be aware of your surroundings. Do not swing or throw the bars, as they could hit someone or cause damage. Instead, walk slowly and steadily, ensuring clear paths and ample space to maneuver. 6. Inspection for Defects: Before using steel round bars, inspect them for any defects or damage. Look for cracks, dents, or deformities that could compromise their structural integrity. If any issues are found, do not use the bars and report them to a supervisor or quality control personnel. 7. Fire Safety: Steel round bars are highly flammable when exposed to extreme heat or sparks. Therefore, avoid working near open flames or hot work areas. Keep fire extinguishers nearby and ensure everyone is trained in fire safety protocols. By following these safety precautions, you can significantly reduce the risks associated with handling steel round bars and create a safer work environment.
- Q: What are the different surface coatings available for steel round bars?
- Steel round bars have several surface coatings available, each with their own unique benefits and uses. Some of the most commonly used surface coatings include: 1. Galvanized Coating: By hot-dip galvanizing, a layer of zinc is applied to the surface of the steel round bar. This zinc coating provides excellent corrosion resistance, protecting the steel from rust and other forms of degradation. Galvanized coatings are frequently used in outdoor and high-humidity environments. 2. Epoxy Coating: Epoxy coatings are either applied as a powder or liquid and then cured through a chemical reaction. They offer outstanding chemical resistance, durability, and protection against corrosion. Epoxy coatings are often employed in industrial and marine applications where harsh chemicals or exposure to saltwater are a concern. 3. Chrome Plating: The surface of the steel round bar is electroplated with a layer of chromium in chrome plating. This process provides high corrosion resistance, as well as excellent hardness and wear resistance. It is commonly utilized in applications that require aesthetic appeal and enhanced durability, such as automotive parts and decorative fixtures. 4. Powder Coating: Powder coating is a dry finishing process in which a powdered polymer is applied to the surface of the steel round bar and then heat-cured. This creates a durable and decorative finish that is resistant to chipping, scratching, and fading. Powder coatings are available in a wide range of colors and textures, making them popular for architectural and decorative purposes. 5. Black Oxide Coating: Black oxide is a conversion coating that is formed through a chemical reaction with the steel surface. It provides a black, decorative finish while also offering mild corrosion resistance. Black oxide coatings are widely used in applications where an aesthetic appearance is desired, such as firearms and hardware. These examples demonstrate the variety of surface coatings available for steel round bars. The choice of coating depends on specific application requirements, including the desired level of corrosion resistance, durability, and aesthetic appeal.
- Q: Can steel round bars be used for making tools or machinery parts?
- Yes, steel round bars can be used for making tools or machinery parts. Steel round bars are commonly used in the manufacturing industry due to their high strength, durability, and ability to withstand heavy loads. They can be machined, forged, or welded into various shapes and sizes to create different tools and machinery parts.
- Q: How do steel round bars compare to carbon fiber round bars?
- Steel round bars and carbon fiber round bars have different characteristics and applications. Steel round bars are known for their high strength and durability, making them suitable for heavy-duty applications. They can withstand higher loads and provide excellent resistance against wear and tear. On the other hand, carbon fiber round bars are significantly lighter than steel bars while still maintaining high strength. They are commonly used in applications where weight reduction is crucial, such as aerospace and sports equipment. Carbon fiber round bars also offer better corrosion resistance compared to steel. The choice between steel and carbon fiber round bars depends on the specific requirements of the application, considering factors such as strength, weight, and cost.
- Q: How do steel round bars perform under impact or shock loading?
- Steel round bars are known for their exceptional performance under impact or shock loading. Due to their high strength and toughness, steel round bars can withstand sudden forces and resist deformation or failure. The inherent properties of steel, such as its hardness and ductility, contribute to its ability to absorb energy and distribute it throughout the material, minimizing the impact on the structure. When subjected to impact or shock loading, steel round bars undergo plastic deformation, which allows them to absorb the applied energy without breaking. The ability to absorb energy is crucial in various applications, such as construction, automotive, and machinery industries, where components are often subjected to dynamic loads. Additionally, steel's excellent fatigue resistance further enhances its performance under impact or shock loading. Even when subjected to repeated impacts, steel round bars can withstand the cyclic loading without undergoing significant degradation in their mechanical properties. Moreover, steel round bars can be further enhanced through various heat treatment processes, such as quenching and tempering, to improve their resistance to impact or shock loading. These processes help to refine the microstructure of the steel, resulting in increased strength, toughness, and hardness. In conclusion, steel round bars have a remarkable performance under impact or shock loading. Their high strength, toughness, and ability to absorb energy make them reliable and widely used in applications where sudden forces or dynamic loads are expected.
- Q: How do you store steel round bars to prevent damage?
- To store steel round bars and prevent damage, there are several important steps to follow. Firstly, it is crucial to keep the bars in a dry and well-ventilated area to avoid moisture buildup, which can lead to rusting. Moisture can also cause the bars to become brittle and weaken over time. Next, it is advisable to store the round bars horizontally rather than vertically. This prevents warping or bending due to the weight of the bars pressing down on each other. If vertical storage is necessary, it is essential to use appropriate racks or supports that evenly distribute the weight. It is also important to avoid stacking the bars too high, as excessive weight can cause deformation or collapse. If stacking is unavoidable, ensure sturdy supports are used and the weight is evenly distributed across the stack. Additionally, it is advisable to separate different sizes or types of steel round bars to prevent scratching or damage. This can be achieved by using separators or dividers to create distinct compartments for each type of bar. Lastly, regularly inspect the stored round bars for any signs of rust, corrosion, or damage. If any issues are detected, take necessary measures to address them promptly. This may involve applying rust inhibitors, cleaning the bars, or contacting professionals for further assistance. By following these storage guidelines, you can effectively protect steel round bars from damage and ensure their longevity and quality.
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Hot Forged QT AISI 4140 Alloy Steel Round Bar
- 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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