HSS Steel Round Bar /High Alloy Round Tool Steel Bar /M2 /M25 /M42 /D2 /H13
- Ref Price:
-
- 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. HSS (M2/W6Mo5Cr4V2/SKH-51/KM-2/1.3342/S600) Round Bar
a)Characteristic:Tungsten-molybdenum high speed steel developed by China,high performance in toughness ,hardness, high temperature hardness.
b)Anneal temperature: 840-860
Relief annealing temperature: 720-760
Hardening temperature: 1210-1230
Hardening medium: salt bath under 600,aslo use oil cooling or air cooling
Normal temper temperation: 540-560 RC Rockwell Hardness after hardening and temperature: 63-66
c)Production Capacity: 1000 Tons/Month
d)Tech:EAF+LF+VD+ESR
e)High strength at elevated temperatures
2. Chemical composition
| C | Si | Mn | W | Mo | Cr | V | P | S |
| 0.80-0.90 | 0.20-0.45 | 0.15-0.40 | 5.50-6.75 | 4.50-5.50 | 3.80-4.40 | 1.75-2.20 | ≤0.030 | ≤0.030 |
3. Process condition
Forged + Annealed + Machining (Peeled/Turned)
Rockwell Hardness: 64-66
Quenching Temperature: 1190-1230
4. Available sizes
Diameter:20mm-80(85)mm(rolled round steel),90-350(400)mm(forged round steel)
Length: optional
5. Heat treatment
1.Annealing after forging:heat to 840-860°c,keep 2-4H,coolbelow to 500°c,hardness≤285HBS
2.Isothermal annealing after forging:heat to 540-860°c,keep temperature 2-4H,furnacecold to 740-760°c,keep temperature 4-6H,to 500°c,hardness≤255HBS.
6. Applications
Can be used in the manufacture of high capacity cutting tools to bear impact force ,such as gear shaper cutter, milling cutter,screw tap,drill bit etc.Also can be used in manufacture of large scale and thermoplasticity shaped cutting tools and antiabrasive cutting tools under high load
7. Packing situation
Standard seaworthy packing or as customers' requirement.
8. Delivery time
30 days after order is confirmed.
9. Products
- Q: How are steel round bars heat treated?
- Steel round bars are heat treated to increase their strength and hardness while also improving their mechanical properties. The heat treatment process typically involves three main steps: heating, soaking, and cooling. Firstly, the steel round bars are heated to a specific temperature, known as the austenitizing temperature. This temperature is usually above the critical temperature of the steel, which allows the material to transform into its austenite phase. The austenitizing temperature varies depending on the type of steel and the desired properties. Once the steel round bars reach the austenitizing temperature, they are soaked at this temperature for a specific duration. The soaking time allows for the complete transformation of the microstructure, ensuring uniformity and avoiding any thermal gradients within the material. The soaking time is crucial in determining the final properties of the steel. After the soaking period, the steel round bars are rapidly cooled in a process called quenching. Quenching is typically done by immersing the bars in a quenching medium, such as oil, water, or air, depending on the desired hardness and properties. The quenching process rapidly cools the bars, causing a martensitic transformation in the steel's microstructure. This transformation results in increased hardness and strength. Following quenching, the steel round bars may undergo an additional step called tempering. Tempering involves reheating the bars to a lower temperature, typically below the austenitizing temperature. This step aims to reduce the brittleness caused by the quenching process while further improving the material's toughness and ductility. Overall, the heat treatment process for steel round bars involves heating to the austenitizing temperature, soaking for a specific duration, quenching to rapidly cool and harden the material, and potentially tempering to achieve the desired properties. This process allows for the customization and enhancement of the steel's mechanical properties, making it suitable for various applications.
- Q: Can steel round bars be used for making agricultural equipment or machinery?
- Yes, steel round bars can be used for making agricultural equipment or machinery. Steel is a versatile and durable material that is commonly used in the manufacturing of various agricultural equipment and machinery. Steel round bars, in particular, are often utilized for making components such as shafts, axles, and rods that are crucial for the functioning of agricultural machinery. These round bars provide strength, stability, and resistance to wear and tear, making them suitable for heavy-duty applications in the agricultural industry. Additionally, steel is also corrosion-resistant, which is especially important in agriculture where equipment is exposed to harsh environmental conditions. Overall, steel round bars are a reliable choice for constructing agricultural equipment or machinery due to their mechanical properties and ability to withstand the demanding conditions of agricultural operations.
- Q: How are steel round bars manufactured?
- Steel round bars are manufactured through a process known as hot rolling. This process starts with heating a large steel billet in a furnace until it becomes soft and malleable. The billet is then passed through a series of rollers which compress and shape it into a round bar. The first step in hot rolling is the roughing mill, where the billet is passed through multiple sets of rollers to reduce its thickness and increase its length. This process also helps to ensure that the steel maintains a consistent temperature throughout. After the roughing mill, the bar enters the finishing mill, where it is further reduced in size and given its final shape. The finishing mill typically consists of several sets of rollers that gradually decrease the diameter of the bar while increasing its length. This process is repeated until the desired dimensions are achieved. During the rolling process, the steel round bar is constantly monitored for quality control. Any imperfections or defects that may arise are detected and corrected to ensure the final product meets the required specifications. Once the bar reaches its final dimensions, it is cooled and cut to the desired length. The cooling process can be done using air, water, or a combination of both. After cooling, the bar is inspected for any surface defects and undergoes further processing if necessary. In some cases, additional treatments such as heat treatment or surface finishing may be applied to enhance the properties and appearance of the steel round bar. Overall, the manufacturing of steel round bars involves a combination of heating, rolling, cooling, and cutting processes to produce a high-quality product that meets the specific requirements of various industries.
- Q: What are the different types of steel round bar machining processes?
- There are several different types of steel round bar machining processes, including turning, milling, drilling, grinding, and threading. Each process serves a specific purpose and is used to shape the steel round bar into a desired form or size.
- Q: How do you know the diameter and weight of a round bar?
- Round is a round, the quality of its G (in grams) is equal to the volume multiplied by the density of 7.85 steel, and its volume is equal to the bottom area multiplied by the degree of L (in cm), then the bar diameter of d=4 * G / L / 7.85 / 3.14 value points
- Q: How do you straighten steel round bars?
- Steel round bars can be straightened by using a hydraulic straightening press or by applying heat and pressure to the bent section until it regains its original shape.
- Q: What are the different methods used for machining steel round bars?
- Machining steel round bars involves the use of various methods, each with its own advantages and applications. Some commonly employed techniques are as follows: 1. Turning: To achieve the desired shape, the steel round bar is rotated against a cutting tool that removes material. Turning is suitable for both external and internal operations, ensuring high precision and excellent surface finish. 2. Milling: This versatile method employs a rotating multi-tooth cutter to remove material from the steel round bar, creating flat or contoured surfaces. It is ideal for face milling, slotting, and profiling. 3. Drilling: Holes of different sizes and depths are created in the steel round bar using a rotating drill bit. This method can be performed manually or through automated processes. 4. Grinding: Precision is key in grinding, a machining technique that employs abrasives to remove material from the steel round bar. It ensures smooth surface finish, tight tolerances, and precise dimensions. Grinding machines, such as cylindrical or surface grinders, are utilized. 5. Boring: Boring enlarges existing holes or creates internal cylindrical shapes within the steel round bar. This technique involves rotating a cutting tool inside the bar to achieve desired dimensions and surface finish. 6. Broaching: Complex internal or external shapes are created using a broach, a multi-toothed cutting tool. The broach is pushed or pulled through the steel round bar to remove material and form the desired shape. 7. Sawing: The steel round bar is cut into desired lengths or shapes using a rotating blade with teeth. Sawing is efficient for mass production and can be done manually or with automated machines. These methods are just a selection of the techniques used for machining steel round bars. The choice of method depends on factors such as the desired shape, dimensions, tolerances, and surface finish, as well as the production volume and available equipment.
- Q: What is the difference between a cold-drawn and a polished steel round bar?
- A cold-drawn steel round bar and a polished steel round bar differ in their manufacturing processes and resulting properties. A cold-drawn steel round bar is produced by pulling or drawing a hot-rolled steel bar through a die or series of dies to reduce its diameter and increase its length. This process is done at room temperature, which imparts certain characteristics to the steel. Cold-drawn steel bars have a smooth and shiny surface, with tight dimensional tolerances and improved mechanical properties. The cold drawing process refines the microstructure of the steel, making it stronger, more uniform, and less prone to defects. These bars are commonly used in applications that require high strength, precision, and resistance to fatigue, such as automotive components, machinery, and tooling. On the other hand, a polished steel round bar undergoes a different treatment process. After the steel bar is formed, it goes through polishing, which involves grinding or buffing the surface to achieve a smooth and reflective finish. Polished steel bars have a shiny and mirror-like appearance due to the removal of surface imperfections and contaminants. This process is primarily done for aesthetic purposes and does not significantly alter the mechanical properties of the steel. Polished steel round bars are commonly used in decorative applications, architectural designs, and furniture. In summary, the main difference between a cold-drawn and a polished steel round bar lies in their manufacturing processes and intended applications. Cold-drawn bars undergo a precise cold drawing process to improve their mechanical properties, while polished bars are subjected to surface polishing for an aesthetically pleasing finish.
- Q: What are the different shapes available for steel round bars?
- The different shapes available for steel round bars include round, square, hexagonal, and flat.
- Q: How are steel round bars tested for quality and strength?
- Steel round bars are tested for quality and strength through various methods to ensure they meet the required specifications and standards. One common test is the tensile test, which measures the bar's ability to withstand tension. During this test, a sample of the steel bar is subjected to a gradually increasing load until it reaches its breaking point. The maximum load it can withstand is recorded, along with the elongation and reduction in area of the sample. These values provide valuable information about the bar's strength and ductility. Another test used is the hardness test, which measures the resistance of the steel bar to indentation or penetration. This test is performed using a hardness testing machine that applies a specific force to a small indenter, such as a diamond or a steel ball, and measures the depth or size of the resulting indentation. The hardness values obtained can indicate the bar's strength and its ability to resist wear and deformation. In addition to these mechanical tests, steel round bars are also subject to non-destructive testing methods. Ultrasonic testing is commonly used to detect internal defects or inconsistencies in the steel bar's structure. This technique involves transmitting high-frequency sound waves through the bar and analyzing the reflected waves to identify any irregularities. Magnetic particle inspection is another non-destructive test that uses magnetic fields and magnetic particles to detect surface or near-surface defects in the steel bar. Chemical analysis is also crucial in determining the quality of steel round bars. This analysis involves testing the composition of the steel to ensure it meets the required chemical specifications. It helps identify the presence of impurities or elements that can affect the bar's performance and durability. Overall, steel round bars undergo a combination of mechanical, non-destructive, and chemical tests to assess their quality and strength. These tests provide valuable information to manufacturers, ensuring that the steel bars meet the necessary standards and are suitable for their intended applications.
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HSS Steel Round Bar /High Alloy Round Tool Steel Bar /M2 /M25 /M42 /D2 /H13
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 5 m.t.
- Supply Capability:
- 100000 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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