Mould Steel Round Bar 1.2379

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 100000 m.t./month

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Mould Steel Round Bar 1.2379 / SAE 8620 Forging Round Steel Bar

Process: EAF+LF+VD+ Hot Forged+Turned(Optinal)+ Heat treatment (Optinal)

Chemical composition (%)

Grade	C	Si	Mn	P ≤	S ≤	Cr	Mo	V
Cr12Mo1V1	1.40-1.60	≤ 0.60	≤ 0.60	0.030	0.030	11.00-13.00	0.70-1.20	0.5-1.10

Production Specification

Material:	forged mould steel round bar
Diameter:	250mm-800mm
Length:	2000mm-12000mm Straightness: 3mm/M max; square bar.150-800mm, blocks sizes up to 800*800mm
Process:	EAF + LF + VD +(ESR) + Forged + Heat Treatment (optional)
Delivery condition:	Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)
Delivery Time:	30 days
MOQ:	20 tons
Heat treatment:	Normalized / Annealed / Quenched / tempered
Forged ratio:	no less than 3:1
Technical Data:	According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing; mould steel round bar available for test
Test:	Ultrasonic test according to SEP 1921-84 G3 C/c
Certificate of Quality	issued in English, in addition the normal terms, production process, the mechanical property (yield strength, tensile strength, elongation and hardness), forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality
Marking:	Grade, heat NO. length will be stamped one each bar with required color
Payment:	30% advance by T\T; Balance pay before the shipment against shipping documents or irrevocable LC at sight
Application:	Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.

Mould Steel Round Bar 1.2379

Q:How do you straighten a bent steel round bar?: To straighten a bent steel round bar, you can follow a few simple steps: 1. Assess the bend: Determine the severity and location of the bend in the round bar. This will help you decide which method to use for straightening. 2. Heat the bar: If the bend is not too severe, you can heat the bar using a blowtorch or a forge. Apply heat evenly across the bent area until it becomes red hot. Heating the bar will make it more malleable and easier to straighten. 3. Apply pressure: Once the bar is heated, you can use a vice or a hydraulic press to apply pressure on the bent section. Gradually increase the pressure until the bar starts to straighten. Be careful not to apply excessive force as it may cause the bar to break. 4. Use leverage: If the bend is not too severe, you can also use leverage to straighten the bar. Secure one end of the bar in a vice or clamp and apply force to the bent section in the opposite direction. Slowly and gently increase the force until the bar straightens. 5. Cold bending: If the bend is minor, you may be able to straighten the bar without applying heat. This method involves using a hammer or mallet to gently tap the bent area in the opposite direction until it straightens. Be cautious not to strike the bar too hard, as it may create new bends or fractures. 6. Check for straightness: After applying the straightening method, carefully inspect the bar to ensure it is straight. If there are any remaining bends, repeat the process until the bar is completely straight. Remember to wear appropriate safety gear, such as gloves and eye protection, when working with steel bars. It is also advisable to consult a professional if you are unsure about the straightening process or if the bar is severely bent.

Q:Why do I use the M25 round bar for the embedded bolt M24?: The problem is that the reinforcement of this 36 is not ordinary steel. This steel bar is called general round bar, and its diameter is 36.2MM. Its concentricity is very high, it is a kind of reinforcing steel that is specially designed for bolt

Q:What are the different grades of alloy steel round bars?: Alloy steel round bars encompass a range of grades, each possessing distinct properties and characteristics. Among the various grades are: 1. 4140: Renowned for its exceptional strength, toughness, and resistance to abrasion, this alloy steel round bar finds common use in axles, shafts, and gears. 2. 4340: Distinguished by its superb hardenability and high tensile strength, this grade is frequently employed in applications necessitating exceptional durability and strength, such as aircraft landing gear components and crankshafts. 3. 8620: Recognized for its case hardening properties, this grade is ideal for applications requiring a combination of toughness and wear resistance. It is commonly utilized in gears, pinions, and camshafts. 4. 316: This stainless steel grade offers remarkable corrosion resistance, rendering it suitable for marine environments or situations where exposure to corrosive substances is a concern. 5. 52100: Known for its elevated hardness and wear resistance, this grade is frequently incorporated into the production of bearings and other components subject to high levels of wear. 6. 4340M: Similar to 4340, this grade features the addition of molybdenum to enhance hardenability and strength. It is often utilized in applications necessitating both high strength and toughness, such as aircraft landing gear components and crankshafts. These examples merely scratch the surface of the diverse range of grades available for alloy steel round bars. The selection of a specific grade hinges on the precise requirements of the application, including desired mechanical properties, corrosion resistance, and heat treatment capabilities.

Q:Can steel round bars be used in the production of medical equipment?: Yes, steel round bars can be used in the production of medical equipment. Steel is known for its durability, strength, and resistance to corrosion, making it suitable for manufacturing various medical instruments and equipment. Steel round bars can be used to create components such as surgical tools, implants, orthopedic devices, and many other medical apparatus.

Q:Is HRB335 round steel or rib steel?: H, R, and B are the first letters in English for hot-rolled (Hotrolled), ribbed (Ribbed) and reinforced (Bars) three words.The numbers behind HRB represent the mechanical properties of the material they produce. The specific value is the yield strength of the material, sigma S (or Sigma P0.2). HRB335, indicating rebar with a yield strength of 335MPa.

Q:What are the different tolerances for steel round bars?: Steel round bars have a range of tolerances that are determined by the specific requirements and standards of different industries and applications. These tolerances ensure that the dimensions and surface conditions of the bars meet the desired specifications. The diameter tolerance is the most common tolerance for steel round bars. It refers to the allowable deviation from the specified diameter. For example, a steel round bar with a diameter tolerance of +/- 0.005 inches means that the actual diameter can vary within this range. Another important tolerance is the straightness tolerance, which measures the allowable deviation from a straight line over a specified length of the bar. Straightness tolerances are usually expressed as the maximum deviation in relation to the length, such as 0.010 inches per foot. Surface finish tolerance is also crucial and refers to the acceptable variation in the surface texture or roughness of the bar. This tolerance is often specified using parameters like Ra or Rz. For instance, a surface finish tolerance of Ra 0.8 micrometers means that the average roughness should not exceed this value. In addition to these common tolerances, there may be other specific tolerances based on the intended application of the steel round bars. These can include tolerances for straightness, length, weight, or other dimensional properties. It's important to note that the tolerances for steel round bars can vary depending on the standards followed by different industries and countries. To determine the specific tolerances required for a particular application, it's advisable to refer to the relevant standards or specifications.

Q:What is the resistance to fatigue of a steel round bar?: The resistance to fatigue of a steel round bar refers to its ability to withstand repeated loading and unloading cycles without experiencing failure or damage. This property is typically evaluated through fatigue testing, where the bar is subjected to a controlled number of stress cycles. The resistance to fatigue of a steel round bar depends on various factors such as the material composition, heat treatment, surface finish, and the presence of any defects or discontinuities.

Q:What are the tolerances for steel round bars?: The tolerances of steel round bars can differ based on the specific requirements of the application and manufacturing process. Generally, steel round bars have specified tolerances for diameter, straightness, and length. For diameter tolerance, it is usual to find tolerances ranging from +/- 0.001 inches to +/- 0.005 inches. This means that the actual diameter of the steel round bar can deviate within this range from the specified diameter. The size and grade of the bar determine the specific tolerance. Straightness tolerance refers to the permissible deviation in the straightness of the bar. Typically, it is specified as a maximum deviation per unit length, such as 0.125 inches per foot. This ensures that the bar remains straight and within acceptable limits when measured along its length. Length tolerance determines the allowable variation in the overall length of the round bar. It can range from +/- 0.125 inches to +/- 0.5 inches, depending on the size and grade of the bar. This ensures that the bar meets the required length specifications. It is important to note that these tolerances can vary based on industry standards, customer specifications, and the manufacturing method employed. Moreover, certain applications may have stricter tolerance requirements, particularly in industries like aerospace or automotive where precision is crucial. To summarize, the tolerances for steel round bars encompass diameter, straightness, and length. The specific tolerances depend on the size, grade, and application of the round bar, as well as any relevant industry standards or customer specifications.

Q:What are the different types of steel round bar sizes?: There are various sizes available for steel round bars, each serving different purposes and applications. The most common steel round bar sizes range from 1/8 inch to 24 inches in diameter. These sizes are typically measured in inches, with each increment representing a larger diameter. For smaller projects or more intricate designs, steel round bars in sizes ranging from 1/8 inch to 1 inch are often used. These smaller sizes are commonly found in jewelry making, crafting, and smaller construction projects. For larger-scale applications such as structural support, manufacturing, or industrial projects, steel round bars with sizes ranging from 1 inch to 24 inches are utilized. These larger sizes provide enhanced strength and durability, making them suitable for heavy-duty use. It's important to note that steel round bars can also be found in metric sizes, which are measured in millimeters. Metric sizes are commonly used in regions that follow the metric system, such as many countries in Europe and Asia. The selection of the appropriate steel round bar size depends on the specific requirements of the project, including load-bearing capacity, structural integrity, and overall design. It's recommended to consult with an engineer or industry professional to determine the best size for your specific application.

Q:What are the considerations for selecting the right steel grade for a round bar?: There are various factors to consider when choosing the appropriate steel grade for a round bar. To begin with, the intended application of the round bar should be taken into account. Different steel grades possess distinct properties that make them suitable for specific purposes. For instance, stainless steel or high-alloy steel, which have exceptional heat resistance, would be ideal for use in high-temperature environments. Conversely, carbon steel, with its good strength and ductility, may be more appropriate for structural applications. Another factor to consider is the desired mechanical properties of the round bar, including tensile strength, yield strength, hardness, and toughness. These properties can vary significantly among different steel grades, so it is crucial to select a grade that meets the specific requirements of the application. Corrosion resistance is also an important consideration. If the round bar will be exposed to corrosive environments, such as in marine or chemical applications, it is advisable to choose a stainless steel grade with high resistance to corrosion. On the other hand, if corrosion resistance is not a major concern, a carbon steel grade may be more cost-effective. Cost is another factor to be taken into account. Different steel grades have varying costs based on availability, demand, and manufacturing processes. It is important to strike a balance between the desired properties of the round bar and the available budget to ensure cost-effectiveness. Moreover, the manufacturability of the steel grade should be considered. Some steel grades may be more challenging to machine or weld, which can impact the production process and cost. It is crucial to select a readily available steel grade that can be easily processed to meet the required specifications. Finally, it is always advisable to seek guidance from steel suppliers, engineers, or metallurgists to ensure that the chosen steel grade aligns with the specific requirements of the application. Their expertise and experience in the industry can provide valuable insights and recommendations.

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