1.2311 Steel Round Bar

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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

1.2311 Steel Round Bar

Grade: 3Cr2Mo/P20/1.2311/Bp20

Characteristic

1, Good hardenability.

2, Polished good performance

3, Good mechanical properties.

4, Section's hardness is uniform.

Chemical composition of 3Cr2Mo

C	Si	Mn	Cr	Mo	P	S
0.28~0.40	0.20~0.80	0.60~1.00	1.40~2.00	0.30~0.55	≤0.030	≤0.030

Specification

Round bar	Diameter (mm)	Length (mm)
Round bar	50~500	2000~5800
plate/sheet	Thickness (mm)	Width (mm)	Length (mm)
plate/sheet	20~400	80~1000	2000~5800

Steel Surface

Steel Sharp	Surface treatment
Round bar	Black /Grinding / Polished / Peeled / Turned
steel plate	Black / Milling / Machined

Application

1. 3Cr2Mo is suitable for making medium and large,sophishticated long-life plastic mold steel.

2. 3Cr2Mo is suitable for manufacturing low melting point alloy die casting and heavy mold main components.

Physical properties

Thermal conductivity

Temperature/°c	20	100	200	300	400
Thermal conductivityλ/W•(m•K)¯¹	36.0	33.4	31.4	30.1	29.3

Coefficient of expansion

Temperature/°C	18~100	18~200	18~300	18~400	18~500	18~600	18~700
Coefficient of expansion/°C-1	11.9*10-6	12.20*10-6	12.5*10-6	12.81*10-6	13.11*10-6	13.41*10-6	13.71*10-6

Company equipment

smelting equipment : 3 and 4 tons induction furnaces;electric slag furnaces of 0.5t,1t,3t,5t,especially 3 and 5 tons electric slag

furnaces which feature both unipolar and bipolarity series functions.etc.

Processing equipments : electric hydraulic hammer; supporting equipments, gas producer, reheating furnace, gas annealing

furnace, electric annealing saw, etc.

Detective equipments : functions of chemical annalysis, physics property and mechnical property, etc.

1.2311 Steel Round Bar

Q:What is the difference between a polished and a cold drawn steel round bar?: A polished steel round bar is a steel bar that has undergone a polishing process. This process involves using abrasive materials to remove any surface imperfections and create a smooth, shiny finish. The purpose of polishing is to enhance the visual appearance and corrosion resistance of the steel bar. It is commonly used for decorative or architectural purposes where aesthetics are important. On the other hand, a cold drawn steel round bar is produced using a different manufacturing process. In this method, a steel bar is pulled through a die at room temperature to reduce its diameter and increase its length. This process results in a bar with a more precise and uniform diameter, as well as improved mechanical properties such as higher tensile strength and dimensional accuracy. Cold drawing also improves the surface finish, although it may not achieve the same level of smoothness and shine as a polished bar. In summary, the main distinction between a polished and a cold drawn steel round bar lies in the manufacturing process and the resulting properties. Polishing is done for aesthetic purposes, creating a smooth and shiny finish. On the other hand, cold drawing is performed to enhance the dimensional accuracy and mechanical properties of the steel bar.

Q:Can steel round bars be coated for added protection?: Yes, steel round bars can be coated for added protection. Coating steel round bars helps to enhance their resistance against corrosion, wear and tear, and other environmental factors that may lead to deterioration or damage. There are various types of coatings available for steel round bars, such as hot-dip galvanizing, epoxy coating, powder coating, and zinc plating. These coatings provide a protective layer that acts as a barrier between the steel and the surrounding environment, preventing the steel from coming into direct contact with corrosive substances or abrasive elements. Coating steel round bars not only increases their longevity and durability but also improves their aesthetic appearance. Additionally, the choice of coating depends on the specific application, environment, and desired level of protection.

Q:Can steel round bars be recycled?: Yes, steel round bars can be recycled. Steel is a highly recyclable material, and this includes steel round bars. Recycling steel round bars involves collecting the scrap material, melting it down, and then reshaping it into new steel products. This process can be done repeatedly without compromising the quality or strength of the steel. Recycling steel round bars not only conserves natural resources but also reduces energy consumption and greenhouse gas emissions compared to producing new steel. It is an environmentally friendly option that helps to promote sustainability and reduce waste.

Q:Can steel round bars be used for making suspension components?: Certainly! Suspension components can indeed be made using steel round bars. Due to its exceptional strength and durability, steel is widely employed in the production of suspension components. These round bars can be either machined or forged into different shapes and sizes, allowing them to fulfill the specific demands of control arms, sway bars, and tie rods. By utilizing steel round bars, suspension components become capable of enduring the forces and stresses experienced during vehicle operation, thus ensuring stability, control, and safety.

Q:What is the maximum weight capacity of a steel round bar?: The maximum weight capacity of a steel round bar depends on its diameter, length, and the specific type of steel used.

Q:What are the advantages of using nickel-molybdenum-chromium alloy steel round bars?: Nickel-molybdenum-chromium alloy steel round bars offer several advantages. Firstly, they exhibit excellent corrosion resistance due to the addition of nickel and chromium. This enhances their ability to withstand oxidation and various corrosive environments, making them ideal for applications where exposure to moisture or chemicals is a concern. Secondly, the inclusion of molybdenum in the alloy strengthens and toughens it. This makes the nickel-molybdenum-chromium alloy steel round bars suitable for high-stress applications, such as in the construction of heavy machinery or structures that require durability and resistance to wear and tear. In addition, this alloy steel demonstrates exceptional heat resistance. It can endure high temperatures without compromising its structural integrity, making it suitable for applications involving extreme heat, such as in the aerospace or power generation industries. Furthermore, nickel-molybdenum-chromium alloy steel round bars possess good weldability, allowing for ease of fabrication and versatility in various manufacturing processes. This makes them a preferred choice for engineers and manufacturers who require a material that can be easily formed or joined to create complex shapes or structures. Lastly, the nickel content in this alloy steel provides excellent resistance to cracking and brittleness, ensuring long-lasting reliability. This guarantees that the round bars will maintain their strength and structural integrity over an extended period, minimizing the risk of failure or breakage in critical applications. Overall, nickel-molybdenum-chromium alloy steel round bars offer enhanced corrosion resistance, improved strength and toughness, excellent heat resistance, good weldability, and high reliability. These qualities make them a preferred choice for a wide range of applications in industries such as construction, manufacturing, and aerospace.

Q:How is a steel round bar made?: To create a steel round bar, a series of steps must be taken during the manufacturing process. First, high-quality raw materials, typically steel billets, are carefully chosen. These billets are then heated in a furnace until they reach an appropriate temperature for forging. Once the billet has been heated, it is placed into a forging machine. Here, it undergoes significant pressure, either from repeated hammer strikes or mechanical press application, to shape it into a round bar. The goal of this forging process is to achieve the desired shape and dimensions. Following the forging stage, the round bar enters a heat treatment process. This involves heating the bar to a specific temperature and then rapidly or slowly cooling it. This treatment enhances the bar's mechanical properties, including its strength, hardness, and toughness, making it suitable for various applications. After heat treatment, the bar goes through machining. This step involves cutting, turning, and grinding the bar to achieve the desired dimensions and surface finish. By doing so, the bar meets the required tolerances and specifications. Lastly, the round bar undergoes a final inspection to ensure its quality and adherence to specified standards. This inspection involves checking its dimensions, surface finish, and any other specific requirements, such as chemical composition or mechanical properties. In conclusion, the production of a steel round bar involves carefully selecting raw materials, forging, heat treatment, machining, and final inspection. Each step in this process is essential in guaranteeing the quality and integrity of the end product.

Q:How can stainless steel rounds occur? Is it a quality problem?: By the skin bubbles, surface cracks and so on. Crack and steel surface vertical, about 0.8 ~ 1.5mm, no decarburization on both sides, this is caused by the bubble caused by the subcutaneous bubble. The molten steel contains a large amount of gas. When the liquid steel is solidified, the gas is discharged to form bubbles. The outer layer of the slab near the bubble called the subcutaneous bubbles, honeycomb shaped perpendicular to the surface of the billet, billet after rolling, the bubbles inside most welding. But if the subcutaneous bubbles near the slab surface is too close, while heating because of billet surface oxidation or burning of the bubble exposed, the bubble surface is oxidized, thus it is not possible to make the steel welding, surface cracks.

Q:What are the different types of steel round bars used in the automotive drivetrain systems?: There are several types of steel round bars commonly used in automotive drivetrain systems, including alloy steel, carbon steel, and stainless steel. These bars are chosen based on their specific properties and characteristics, such as strength, durability, and resistance to corrosion. The selection of the type of steel round bar depends on the specific application and requirements of the drivetrain system.

Q:How do steel round bars perform in outdoor or marine environments?: Steel round bars generally perform well in outdoor or marine environments due to their inherent strength and corrosion resistance. The composition of steel, particularly stainless steel, enables it to withstand exposure to moisture, saltwater, and other harsh elements without significant degradation or rusting. This makes steel round bars a dependable choice for construction, infrastructure, and marine applications where durability and longevity are crucial.

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