JIS Scr420,DIN 20Cr4,SAE 5120, Alloy Steel Bar
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 10000 m.t./month
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Specification
JIS Scr420,DIN 20Cr4,SAE 5120, Alloy Steel Bar
Product information:
Hot rolling craftwork and fine mechanical performance
Chemical components meet standards, delivery in black skin
Standards: a) JIS Scr420 b) Din 20Cr4 c) ASTM 5120 d)GB/T3077 20Cr
Size: dia 16-200mm
Length:6M above
Packing:Bundles
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Product detail:
1. Delivery condition: Hot-rolled,black surface. Hot forged +Rough machined (black surface after Q/T)+ Turned (optional), Cold-drawn Conditionm, Q+T with black surface.
2. Chemical composition: %
| C | Si | Mn | P | S | Cr |
| 0.18-0.24 | 0.17-0.37 | 0.7-1.0 | ≤0.03 | ≤0.030 | 0.5-0.9 |
3. Process: EAF + LF + VD + Forged + Heat Treatment (optional)
4. Technical Data: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing
5. Test: ultrasonic test according to SEP 1921-84 3C/c
6. Material details will be as per agreed technical specifications
7. 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.
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Our service:
-High manufacturing accuracy
-High strength
-Small inertia resistance
-Strong heat dissipation ability
-Good visual effect
-Reasonable price
Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer's trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.
If you need the sample, please feel free to let me know. Any question, we will contact you ASAP!
Alloy steel is a kind of steel in addition to containing silicon and manganese as alloying elements and deoxidizing elements, but also contains other alloy elements such as chromium, nickel, molybdenum, vanadium, titanium, copper, tungsten, aluminum, cobalt, niobium, zirconium and other elements, and some also contain some nonmetallic elements (such as boron, nitrogen, etc.) of the steel. Alloy steel due to the presence of different kinds and quantities of alloying elements and take appropriate measures in the process, can be respectively, with high strength, toughness, quenching through resistance, abrasion resistance, corrosion resistance, resistance to temperature resistance, heat resistance and other special properties.
Alloy steel bar is mainly applicable to drill, milling cutter, reamer. It can also be used for cutting, stamping and measuring tools. It is used in the paper, packaging, printing, non-ferrous metal processing industry. In addition, it is also widely used for processing high-speed steel cutting tool, hard alloy cutter, hard alloy cutting tools, NAS cutting tool, air tool, hard alloy bit, cutter from core bit, high speed steel, taperd milling cutter, cutter metric, micro end milling cutter, the hinge pilot, electronic tools, drilling ladder, metal cutting saw, double assurance diamond, guns, angle cutter, tungsten carbide rotary burrs, hard alloy cutting tools and so on.
- Q: How does special steel perform in high-stress environments?
- Special steel performs exceptionally well in high-stress environments due to its unique properties. Its enhanced strength, durability, and resistance to corrosion make it highly reliable and capable of withstanding extreme conditions. This allows it to maintain its structural integrity and prevent deformation or failure, making it ideal for use in demanding industries like aerospace, oil and gas, and automotive.
- Q: How does special steel contribute to the wear resistance of products?
- The wear resistance of products is enhanced by special steel in various ways. Firstly, special steel possesses high strength and hardness, enabling it to withstand heavy loads and resist deformation. This characteristic is particularly vital in applications where products are exposed to abrasive forces or repetitive stress, such as in machinery parts or cutting tools. Furthermore, special steel often includes specific alloying elements that augment its wear resistance. For instance, the introduction of chromium can create a protective layer of chromium oxide on the steel's surface, acting as a barrier against corrosion and wear. Similarly, the incorporation of vanadium or molybdenum can heighten the steel's hardness and toughness, rendering it more resilient to wear and fatigue. Additionally, heat treatment can be employed to further enhance the wear resistance of special steel. Techniques like quenching and tempering can modify the steel's microstructure, resulting in a fine-grained and uniform composition. Consequently, this leads to improved hardness, increased resistance to wear, and enhanced dimensional stability. In conclusion, special steel contributes to the wear resistance of products due to its inherent strength and hardness, the presence of alloying elements that enhance wear resistance, and its capacity to undergo heat treatment for improved properties. These characteristics make special steel an exceptional choice for applications where durability and longevity are of utmost importance.
- Q: What are the different methods of surface lapping for special steel?
- There are several methods of surface lapping for special steel, including abrasive lapping, diamond lapping, and chemical lapping. Abrasive lapping involves using an abrasive material, such as silicon carbide or aluminum oxide, to remove small amounts of material from the surface of the steel. Diamond lapping, on the other hand, utilizes diamond particles to achieve a high level of precision and smoothness. Chemical lapping involves using a chemical compound that reacts with the steel surface, selectively removing material to achieve the desired finish. Each method has its own advantages and is chosen based on the specific requirements of the steel and the desired outcome.
- Q: How does special steel contribute to the chemical processing industry?
- The chemical processing industry heavily relies on special steel, which offers a wide range of benefits that enhance the efficiency and safety of various processes. One crucial characteristic of special steel is its high resistance to corrosion, which is vital when dealing with corrosive chemicals. This resistance ensures that equipment and pipelines made from special steel can endure harsh chemical environments without deteriorating, leading to longer lifespan and reduced maintenance costs. Moreover, special steel exhibits exceptional strength and durability, enabling it to withstand the high temperatures and pressures commonly encountered in chemical processing. This strength guarantees that equipment like reactors, heat exchangers, and vessels can function effectively under demanding conditions, minimizing the likelihood of failures or accidents. Additionally, special steel possesses excellent thermal conductivity, making it highly advantageous in heat transfer applications. This property facilitates efficient heat exchange between different fluids, thereby enhancing the overall energy efficiency of chemical processes. By enabling effective heat transfer, special steel optimizes the performance of equipment such as condensers, boilers, and evaporators. Furthermore, special steel is frequently utilized in the construction of storage tanks and pipelines for the transportation and distribution of chemicals. Its remarkable resistance to mechanical stress and impact makes it ideal for ensuring the secure containment and transportation of hazardous substances, reducing the risk of leaks or spills that could have severe environmental and safety consequences. In conclusion, the utilization of special steel in the chemical processing industry significantly contributes to the reliability, efficiency, and safety of various processes. Its resistance to corrosion, strength, thermal conductivity, and durability make it an essential material for equipment and infrastructure, guaranteeing the smooth and secure operation of chemical processing plants.
- Q: What are the standards and certifications for special steel?
- Some of the standards and certifications for special steel include ISO 9001 for quality management systems, ISO 14001 for environmental management systems, and ISO 45001 for occupational health and safety management systems. Additionally, there are various industry-specific standards such as ASTM International, EN standards, and JIS standards that provide specifications and testing requirements for different types of special steel. These standards and certifications ensure that the special steel meets specific quality, safety, and environmental standards, and helps to establish trust and credibility in the industry.
- Q: How is the tensile strength of special steel measured?
- The tensile strength of special steel is typically measured using a standardized test called a tensile test. In this test, a sample of the special steel is subjected to an increasing amount of tension until it reaches its breaking point. During the test, the applied force is measured, and the corresponding deformation or elongation of the sample is also recorded. The tensile strength is then calculated by dividing the maximum force applied to the sample by its cross-sectional area before the test. This measurement provides an indication of the maximum amount of stress the steel can withstand before it fails or breaks. The tensile strength is an important parameter in determining the suitability of special steel for various applications and ensuring the structural integrity and reliability of the material.
- Q: How does precipitation hardening enhance the strength of special steel?
- Precipitation hardening, also known as age hardening, is a heat treatment process that enhances the strength of special steel alloys. This process involves a series of steps that result in the formation of fine particles or precipitates within the material's microstructure. The strength of special steel is primarily determined by the arrangement and interaction of its atoms. In its initial state, the alloy's atoms are distributed randomly, resulting in a relatively soft and ductile material. However, through precipitation hardening, the formation of precipitates during heat treatment plays a crucial role in strengthening the steel. The process begins by heating the steel to a high temperature, known as solution treatment or aging temperature. This temperature allows the atoms to dissolve and form a solid solution. The alloy is then rapidly cooled to retain the supersaturated state of the solution. Following the rapid cooling, the steel is subjected to a lower temperature, known as aging temperature. At this stage, the dissolved atoms begin to migrate and cluster together, forming small precipitates within the material's microstructure. These precipitates act as obstacles to the movement of dislocations, which are the primary carriers of plastic deformation in metals. The presence of these precipitates hinders the dislocation movement, making it more difficult for them to glide through the crystal lattice. As a result, the strength of the steel is significantly enhanced. The dislocation obstacles provided by the precipitates increase the resistance to deformation, resulting in improved hardness and strength. Furthermore, the size, distribution, and homogeneity of the precipitates play a crucial role in determining the strength enhancement. Smaller and more uniform precipitates provide a higher density of obstacles, leading to a greater strengthening effect. Additionally, the precipitation hardening process also influences other material properties, such as corrosion resistance and toughness. In conclusion, precipitation hardening enhances the strength of special steel by creating fine precipitates within the material's microstructure. These precipitates act as obstacles to dislocation movement, increasing the resistance to deformation and resulting in improved hardness and strength. This heat treatment process plays a crucial role in the development of high-performance special steel alloys used in various industries.
- Q: How are cobalt-based alloys used in dental applications?
- Cobalt-based alloys are commonly used in dental applications due to their excellent mechanical properties, corrosion resistance, and biocompatibility. They are used in dental prosthetics, such as crowns, bridges, and dentures, as well as in dental implants. These alloys provide high strength and durability, ensuring long-lasting dental restorations. Additionally, their biocompatibility ensures that they do not cause any adverse reactions in the oral environment.
- Q: How does special steel contribute to the manufacturing of springs for automotive applications?
- The unique properties and characteristics of special steel play a crucial role in the manufacturing of springs for automotive applications. Springs are essential components in automobiles as they provide suspension and shock absorption, which ensures a comfortable and smooth ride. One of the main advantages of using special steel in spring manufacturing is its high strength and durability. Springs are constantly subjected to stress and repetitive loading, but special steel can withstand these forces without deforming or breaking due to its exceptional strength. This property ensures that the springs can maintain their shape and performance over extended periods of use, guaranteeing reliable functionality. Special steel also offers excellent fatigue resistance, a vital characteristic for automotive springs. Fatigue occurs when a material weakens and eventually fails after repeated loading and unloading cycles. However, special steel is specifically designed to withstand fatigue, allowing the springs to endure constant pressure and stress without prematurely failing. Furthermore, special steel provides superior corrosion resistance, which is particularly important for automotive springs. Cars are exposed to various environmental elements, such as moisture, road salt, and chemicals, which can lead to corrosion and deterioration of the springs. By utilizing special steel with enhanced corrosion resistance, manufacturers can ensure that the springs have a longer lifespan and maintain their performance even in harsh conditions. Additionally, special steel offers versatility in terms of its composition and properties. Manufacturers can choose from a wide range of special steel alloys, each with its own unique characteristics, to meet specific requirements. This flexibility in material selection empowers manufacturers to design and produce springs that are tailored to the specific needs of automotive applications. Some alloys offer greater elasticity, allowing the springs to flex and absorb shocks more effectively, while others provide higher hardness, enhancing the springs' load-bearing capacity. In conclusion, special steel significantly contributes to the manufacturing of springs for automotive applications by providing high strength, durability, fatigue resistance, corrosion resistance, and versatility. These properties enable the production of reliable, long-lasting springs that ensure optimal suspension, shock absorption, and overall performance in vehicles.
- Q: How does special steel contribute to reducing product waste during manufacturing?
- Special steel contributes to reducing product waste during manufacturing by offering enhanced properties such as durability, strength, and corrosion resistance. This allows manufacturers to produce longer-lasting and more reliable products. By using special steel, companies can reduce the need for frequent replacements, repairs, or discarded products due to wear and tear. This not only minimizes material waste but also reduces the environmental impact associated with manufacturing processes.
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JIS Scr420,DIN 20Cr4,SAE 5120, Alloy Steel Bar
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 10000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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