Hot Rolled 5140 Steel, 5140 Steel Structure, 5140 Steel Plate

Hot Rolled 5140 Steel, 5140 Steel Structure, 5140 Steel Plate System 1

Hot Rolled 5140 Steel, 5140 Steel Structure, 5140 Steel Plate

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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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Hot Rolled 5140 Steel, 5140 Steel Structure, 5140 Steel Plate

Equivalent grades

GB	DIN	AISI	JIS
42CrMo	1.7225	4140	SCM440

Chemical Composition

C	Si	Mn	Cr	Mo	P	S
0.38-0.43	0.40max	0.60-0.90	0.90-1.20	0.15-0.30	≤0.035	≤0.035

Available size

Round steel bar 60-800mm
Flat steel bar 25-400mm*200-800mm

Surface condition

Black surface/ Grinded/ Machined

Black surface/ Grinded/ Machined

Hardness

Annealed HBS 217 max

Annealed HBS 217 max

Characteristics

4140 Alloy Steel/SAE 4140 Steel Price is engineering steel supplied in quenched and tempered conditions. Very good machinability. High toughness. High creep strength. Repeated impact resistant capability.

4140 Alloy Steel/SAE 4140 Steel Price is engineering steel supplied in quenched and tempered conditions. Very good machinability. High toughness. High creep strength. Repeated impact resistant capability.

Applications

4140 Alloy Steel/SAE 4140 Steel Price is use to producecomponents with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering .

4140 Alloy Steel/SAE 4140 Steel Price is use to producecomponents with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering .

Heat treatment

Forging		Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc.
Annealing		Heat to 830°C-850°C.Cool in furnace.
Normalising		Heat to 870°C-900°C.Cool in still air.
Stress Relieving		Annealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air.
Hardening		Heat to 830°C-880°C. Quench in oil or polymer.
Tempering		Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided.

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Hot Rolled 5140 Steel, 5140 Steel Structure, 5140 Steel Plate

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SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem

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Q: What is the significance of carbon content in special steel?: The carbon content in special steel is significant because it determines the steel's hardness, strength, and overall performance. Higher carbon content results in increased hardness and strength, making the steel suitable for applications requiring durability and resistance to wear and tear. On the other hand, lower carbon content enhances the steel's ductility and formability, making it more suitable for shaping and molding processes. Therefore, carbon content plays a crucial role in tailoring the properties of special steel to meet specific industrial requirements.

Q: How are titanium alloys used in the medical industry?: Titanium alloys are widely used in the medical industry due to their excellent biocompatibility, corrosion resistance, and high strength-to-weight ratio. These alloys are used for various medical applications such as implants, surgical instruments, and medical equipment. They are often used in orthopedic implants, dental implants, and cardiovascular devices, as they provide long-term stability and compatibility with the human body. Additionally, titanium alloys are highly resistant to bodily fluids and can withstand harsh sterilization processes, making them ideal for use in the medical field.

Q: How does special steel resist oxidation at high temperatures?: Due to the presence of specific alloying elements and a carefully controlled manufacturing process, special steel is able to resist oxidation at high temperatures. When exposed to oxygen in the air, alloying elements like chromium, nickel, and aluminum form a protective oxide layer on the steel's surface. This layer acts as a barrier, preventing further oxidation. Of these alloying elements, chromium is particularly effective in forming a stable and dense chromium oxide layer. This layer serves as a self-healing mechanism, meaning that if it becomes damaged or scratched, it will quickly regenerate and continue to protect the steel from oxidation. The manufacturing process of special steel involves precise control of composition and heat treatment. This ensures that the steel has a fine and uniform microstructure, minimizing the presence of impurities or defects that could speed up oxidation. Moreover, the steel often undergoes various heat treatments, such as annealing or quenching, which further enhance its resistance to oxidation. In conclusion, the combination of alloying elements, controlled composition, and specific manufacturing processes allow special steel to withstand oxidation at high temperatures. This makes it an ideal choice for applications in industries like aerospace, power generation, and petrochemical.

Q: Can special steel be used in the production of precision instruments?: Yes, special steel can be used in the production of precision instruments. Special steel, known for its high strength, corrosion resistance, and heat resistance, provides the necessary durability and stability required for precise measurements and operations in precision instruments.

Q: How does special steel perform in high-vibration environments?: Special steel performs well in high-vibration environments due to its exceptional strength, durability, and ability to dampen vibrations. Its unique composition and heat treatment make it highly resistant to fatigue, reducing the risk of fractures or failures caused by constant vibrations. Additionally, special steel's excellent hardness and toughness properties allow it to maintain its structural integrity and performance even under severe vibration conditions.

Q: What are the different types of welding techniques used for special steel?: There are several types of welding techniques used for special steel, including TIG (Tungsten Inert Gas) welding, MIG (Metal Inert Gas) welding, Stick welding, and Flux-cored arc welding. These techniques are commonly used for welding special steel due to their ability to provide strong and precise welds, ensuring the integrity and durability of the material.

Q: Can special steel be used for precision instruments?: Yes, special steel can be used for precision instruments. Special steels, such as high-speed steel or tool steel, possess excellent properties like high hardness, wear resistance, and dimensional stability. These qualities make them suitable for manufacturing precision instruments that require accuracy and durability, such as surgical tools, measuring equipment, or watch components.

Q: What are the different heat treatment processes used in special steel production?: Some of the different heat treatment processes used in special steel production include annealing, tempering, quenching, normalizing, and hardening.

Q: What are the different surface cleaning methods used for special steel?: For special steel, there are multiple ways to clean the surface depending on specific needs and desired cleanliness level. Some commonly utilized methods are as follows: 1. Mechanical Cleaning: By employing abrasive materials or tools, such as sanding, wire brushing, or abrasive blasting, dirt, rust, and other impurities can be physically removed from the steel surface. 2. Chemical Cleaning: This technique involves the use of chemical agents to dissolve or loosen dirt, grease, oil, or rust. Different chemicals are utilized based on the type and severity of contaminants. Acid pickling, for instance, immerses the steel in an acid solution to eliminate scale and rust. 3. High-pressure Water Cleaning: High-pressure water jets forcefully eliminate dirt, grease, and other impurities from the steel surface. This method effectively removes loose particles and can be used as a preliminary step before other surface preparation techniques. 4. Ultrasonic Cleaning: By utilizing high-frequency sound waves, ultrasonic cleaning creates microscopic bubbles in a cleaning solution. These bubbles implode upon contact with the steel surface, effectively removing hard-to-reach contaminants. 5. Electrochemical Cleaning: This method involves passing an electric current through a cleaning solution or electrolyte to aid in the removal of contaminants from the steel surface. It is particularly useful in eliminating rust and restoring the steel's appearance. 6. Thermal Cleaning: Thermal cleaning methods, such as flame cleaning or heat treatment, subject the steel to high temperatures. This process burns off organic contaminants or induces controlled oxidation, subsequently removing scale, rust, or other surface impurities. It is important to consider various factors, including the type of contaminants, steel condition, desired cleanliness level, and application requirements when choosing a surface cleaning method. Combining different methods may yield the most optimal results.

Q: How does special steel compare to other materials such as aluminum or titanium?: Special steel boasts a unique set of advantages and characteristics when compared to materials like aluminum or titanium. Firstly, its exceptional strength and durability set it apart. With a higher tensile strength than aluminum and titanium, it is ideal for applications that require withstanding heavy loads or high-stress environments. This strength also ensures a longer lifespan by resisting wear and tear. Furthermore, special steel maintains its mechanical properties even at extreme temperatures. Unlike aluminum and titanium, which experience a significant decrease in strength at elevated temperatures, special steel retains its structural integrity, making it suitable for applications involving high temperatures or thermal cycling. In terms of cost-effectiveness, special steel often proves to be more affordable than titanium, especially in large-scale production. While aluminum is generally cheaper than special steel, it may lack the same level of strength or resistance to corrosion, limiting its applicability in certain industries. Additionally, special steel exhibits excellent machinability and can be easily formed into different shapes and sizes, allowing for greater design flexibility. This quality makes it suitable for various industries such as automotive, aerospace, construction, and manufacturing, where complex components or structures are required. Lastly, special steel showcases superior corrosion resistance compared to aluminum and titanium. It can be treated or coated to provide additional protection against rust and other forms of degradation, further extending its lifespan. In summary, special steel surpasses aluminum and titanium in terms of strength, durability, temperature resistance, and corrosion resistance. Its cost-effectiveness, machinability, and versatility make it a preferred material in various industries, where high-performance and reliability are crucial factors.

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