Special Steel 1.7225 Steel Round Bar / SCM440 Round Bar

Special Steel 1.7225 Steel Round Bar / SCM440 Round Bar

Ref Price:: $300.00 - 500.00 / m.t.

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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The details of our Steel

1. Produce Standard: as the GB, AISI, ASTM, SAE, EN, BS, DIN, JIS Industry Standard

2. Produce processes: Smelt Iron -EAF smelt Billet - ESR smelt Billet -Hot rolled or forged get the steel round bar and plate

3. Heat treatment:

Normalized / Annealed / Quenched+Tempered

4. Quality assurance:

All order we can received Third party inspection, You can let SGS, BV,.. and others test company test and inspect our products before Goods shipping.

Product information

Chemical Composition(%) of SCM440 round bar	C	Si	Mn	P	S	Cr	Mo
	0.38-0.45	≤0.40	0.60-0.90	≤0.035	≤0.035	0.90-1.20	0.15-0.30
Specification of SCM440 round bar	Hot Rolled: Dia.(mm)L(mm)=14-202000-6000
	Forged: Dia.(mm)L(mm)=210-8002000-6000
Application of SCM440 round bar	(1) unibody electrical and electronic mold; (2) plastic mould and die holders; (3) making main shaft of streamer, bolt for 400°C; (4) making the hammer stem and aggravating drill pipe.
Characteristic of SCM440 round bar	(1) High strength and toughness; (2) Good hardenability and the quenching deformation is small; (3) Good processability and easy polishing; (4) Easy texture and platable; (5) The strength and section are bigger than 35CrMo(4135).
Heat Treatment of SCM440 round bar	Forging:1100~900°C Normalization:860~880°C Subcritical Annealing:680~720°C Isothermal Annealing:830~900 670x3h°C Hardening:830~860 oil Tempering:550~650°C
Mechanical Property of SCM440 round bar	Rm(MPa): 1080 Re(MPa): 930 Ae%: 12 Z%: 45 A(S): 63
Delivery Condition of SCM440 round bar	hot rolled, black surface, annealed
Payment Term of SCM440 round bar	L/C,T/T,30% in advance,70% before the shipment

Main product

High speed steel
AISI	M2,M4,M35,M42,T1
DIN	1.3343,1.3243,1.3247,1.3355
JIS	SKH51,SKH54,SKH35,SKH59,SKH2
Cold work tool steel
AISI	D2,D5,D3,D6,A8,A2,O1
DIN	1.2379,1.2601,1.2080,1.2436,1.2631,1.2363,1.2510,1.2327
JIS	SKD10,SKD11,SKD1,SKS3
Hot work tool steel
AISI	H13,H11,H21
DIN	1.2344,1.2343,1.2367,1.2581,1.2713
JIS	SKD61,SKD6,SKD7,SKD5SKT4
Plastic mould steel
AISI	P20,P20+Ni,420
DIN	1.2311,1.2738,1.2083,1.2316
JIS	PDS-3,SUS420J1,SUS420J2
Alloy structural seel
AISI	5140,4340,4135,4140
DIN	1.7035,1.6511,1.7220,1.7225
JIS	SCr440,SNCM439,SCM435,SCM440
Stainless steel
AISI	440C,420,430
DIN	1.4125
JIS	SUS440C
Carbon steel
AISI	1045,1020
DIN	1.1191
JIS	S45C, G3101

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Workshop show

Special Steel 1.7225 Steel Round Bar / SCM440 Round Bar

Shipping

1. FedEx/DHL/UPS/TNT for samples, Door-to-Door;

2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;

3. Customers specifying freight forwarders or negotiable shipping methods!

Delivery Time: 3-7 days for samples; 5-25 days for batch goods.

Payment Terms

1.Payment: T/T, L/C, Western Union, MoneyGram,PayPal; 30% deposits; 70% balance before delivery.

2.MOQ: 1pcs

3.Warranty : 3 years

4.Package Informations: 1) EXPORT, In 20 feet (GW 25 ton) or 40 feet Container (GW 25 ton)

2)as customer's requirement

Why choose us?

(1) The leading exporter in China special steel industry.

(2) Large stocks for various sizes, fast delivery date.

(3) Good business relationship with China famous factories.

(4) More than 7 years steel exporting experience.

(5) Good after-sales service guarantee.

Q: What are the different cutting tools used for machining special steel?: There are various cutting tools used for machining special steel, including carbide inserts, high-speed steel (HSS) tools, ceramic inserts, and diamond tools. These tools are designed to withstand the high temperatures and hardness of special steel, providing efficient cutting and shaping capabilities.

Q: How does special steel contribute to the weldability of products?: Special steel contributes to the weldability of products in several ways. Firstly, special steel is specifically designed to have enhanced weldability characteristics, making it easier for welders to join different pieces of steel together. This is achieved by carefully controlling the chemical composition of the steel, ensuring that it has the necessary alloying elements and impurity levels to promote good weldability. Secondly, special steel often has lower carbon content compared to regular steel, which reduces the likelihood of weld metal cracking. Carbon is known to increase the susceptibility to cracking during welding, so by decreasing the carbon content, special steel minimizes this risk, ensuring a stronger and more durable weld joint. Furthermore, special steel is often produced with controlled grain size and microstructure, which improves its weldability. Fine-grained steel exhibits better toughness and reduced brittleness, making it less prone to cracking during welding. Similarly, a well-controlled microstructure ensures a more uniform distribution of alloying elements, resulting in improved mechanical properties and weldability. Special steel is also often subjected to various heat treatment processes to further enhance its weldability. Heat treatments such as annealing, normalizing, or quenching and tempering can refine the microstructure, relieve residual stresses, and improve the toughness of the steel, all of which contribute to better weldability. In addition, special steel is carefully manufactured to have low levels of impurities, such as sulfur and phosphorus, which can negatively affect weldability. Minimizing these impurities ensures that the steel can be welded without the formation of detrimental welding defects and improves the overall quality of the weld. Overall, special steel plays a crucial role in enhancing the weldability of products. Its carefully controlled chemical composition, reduced carbon content, controlled grain size and microstructure, as well as the application of heat treatments, all contribute to easier, stronger, and more reliable weld joints.

Q: What are the common challenges in machining titanium alloys?: Machining titanium alloys poses several common challenges that need to be addressed in order to achieve successful and efficient results. One of the primary challenges is the material's inherent strength and hardness. Titanium alloys are known for their excellent strength-to-weight ratio, which makes them ideal for various applications. However, this same strength can make them difficult to machine. The high strength of titanium alloys increases the cutting forces required during machining, leading to faster tool wear and decreased tool life. This necessitates the use of robust cutting tools made from materials such as carbide or ceramic, which can withstand the demanding conditions and maintain their cutting performance. Another challenge in machining titanium alloys is their poor thermal conductivity. This characteristic causes heat to build up rapidly during the cutting process, leading to localized high temperatures. These high temperatures can result in thermal damage to both the cutting tool and the workpiece, leading to reduced dimensional accuracy and surface finish. To overcome this challenge, it is crucial to implement effective cooling and lubrication techniques, such as using coolant or high-pressure air, to dissipate the heat and prevent overheating. Furthermore, titanium alloys have a tendency to generate built-up edge (BUE) during machining. BUE is the accumulation of workpiece material on the cutting tool, which can cause poor chip evacuation, increased cutting forces, and surface finish issues. To mitigate BUE formation, it is recommended to use proper cutting speeds and feed rates, as well as employing cutting fluids that aid in chip evacuation and prevent the adhesion of material on the tool. Additionally, titanium alloys are highly reactive with oxygen, resulting in the formation of a tenacious oxide layer on the surface during machining. This oxide layer can cause tool chipping and premature wear. To combat this, it is necessary to employ suitable cutting speeds and feeds that promote efficient material removal while minimizing prolonged exposure to the reactive nature of titanium alloys. Lastly, the low thermal expansion coefficient of titanium alloys can cause workpiece distortion and dimensional inaccuracies. To address this challenge, it is important to ensure proper fixturing and clamping techniques that minimize workpiece movement during machining. In conclusion, the common challenges in machining titanium alloys include high cutting forces, poor thermal conductivity, built-up edge formation, reactive oxide layer, and workpiece distortion. These challenges can be overcome through the use of appropriate cutting tools, effective cooling and lubrication techniques, proper cutting parameters, and careful workpiece handling.

Q: Can special steel be used in the furniture manufacturing industry?: Yes, special steel can be used in the furniture manufacturing industry. Special steel offers various advantages such as strength, durability, and corrosion resistance, making it suitable for producing sturdy and long-lasting furniture pieces. Additionally, special steel can be molded and shaped into various designs, providing flexibility and creativity in furniture manufacturing.

Q: What are the properties of wear-resistant steel?: Wear-resistant steel possesses unique properties that make it highly resistant to abrasion and wear. It has a high hardness level, which enables it to withstand repeated impact and friction without deforming or wearing down. Additionally, wear-resistant steel exhibits excellent toughness, allowing it to absorb energy and resist cracking or breaking under harsh conditions. It also has a high strength-to-weight ratio, making it suitable for applications requiring both strength and durability. Overall, the properties of wear-resistant steel make it ideal for use in industries such as mining, construction, manufacturing, and transportation, where materials are subjected to intense wear and tear.

Q: How is high-speed stainless steel used in the production of machining tools?: High-speed stainless steel is often used in the production of machining tools due to its excellent combination of strength, hardness, and corrosion resistance. It allows for higher cutting speeds and longer tool life, resulting in improved productivity and cost-efficiency. Additionally, the stainless steel's resistance to heat and wear makes it suitable for high-temperature applications, ensuring the durability and reliability of the machining tools.

Q: What are the limitations of using special steel in electrical applications?: Using special steel in electrical applications comes with several limitations. Firstly, it tends to be more expensive compared to other commonly used materials like copper or aluminum, making it less cost-effective for large-scale projects. Another drawback is its relatively high electrical resistivity, which hampers its efficiency in conducting electricity. This results in higher energy losses and lower overall efficiency in electrical systems, which is particularly concerning for energy-efficient applications like power generation or transmission. Moreover, special steel lacks the malleability and ductility found in materials like copper, making it less suitable for applications requiring shaping or forming. Working with it can be more challenging and may necessitate complex manufacturing processes. Furthermore, special steel is more susceptible to corrosion compared to materials like copper or aluminum. In environments with high humidity or moisture exposure, this can significantly limit its use in electrical applications. Corrosion not only degrades the steel's electrical properties but also reduces its lifespan, leading to increased maintenance and replacement costs. Lastly, special steel may not be as readily available or easily sourced as other materials commonly used in electrical applications. This can present challenges in terms of availability, lead times, and potential disruptions in the supply chain, ultimately impacting project timelines and overall productivity.

Q: What are the requirements for special steel used in agricultural machinery?: The requirements for special steel used in agricultural machinery include high strength and durability to withstand heavy loads and harsh working conditions, excellent impact resistance to handle rough terrains, good corrosion resistance to protect against rust and moisture, and high wear resistance to prolong the lifespan of components exposed to abrasive materials. Additionally, the steel should have good weldability and machinability to facilitate the manufacturing process of agricultural machinery.

Q: What are the thermal conductivity properties of special steel?: Special steels, also known as alloy steels, exhibit varying thermal conductivity properties depending on their composition and specific heat treatment. The thermal conductivity of special steel generally ranges from 10 to 50 W/mK. The thermal conductivity of steel is primarily influenced by its carbon content, alloying elements, and microstructure. Carbon acts as a thermal conductor in steel, increasing its thermal conductivity. However, alloying elements such as chromium, nickel, and molybdenum can reduce the thermal conductivity of steel due to their lower thermal conductivity compared to iron. Additionally, the microstructure of special steel plays a crucial role in determining its thermal conductivity. Heat treatments such as quenching and tempering can alter the microstructure, affecting the thermal conductivity of the steel. For example, steels with a higher carbon content and a martensitic microstructure tend to have higher thermal conductivity compared to steels with lower carbon content and a ferritic or pearlitic microstructure. It is important to note that the thermal conductivity of special steel can also be influenced by other factors such as impurities, grain size, and the presence of defects. These factors can either enhance or reduce the thermal conductivity. In summary, the thermal conductivity properties of special steel can vary depending on its composition, heat treatment, and microstructure. Therefore, it is essential to consider these factors when evaluating the thermal conductivity of special steel for specific applications.

Q: How does tungsten contribute to the properties of special steel?: Special steel greatly benefits from the inclusion of tungsten, which is a critical element that significantly impacts its properties. One of the key advantages of incorporating tungsten into steel lies in its ability to enhance strength and hardness. This is achieved through the formation of a solid solution with iron, resulting in a microstructure with fine grains that effectively increase overall toughness and wear resistance. Furthermore, tungsten plays a pivotal role in improving the high-temperature strength of special steel. Due to its high melting point, tungsten maintains its strength even under elevated temperatures, making it an ideal choice for applications that require resistance to heat and thermal stress. Consequently, special steel containing tungsten can be employed in environments with extreme temperatures, such as gas turbines, rocket nozzles, and cutting tools. Another crucial contribution of tungsten lies in enhancing the corrosion resistance of special steel. By forming stable carbides, tungsten provides a protective barrier against corrosion and erosion, effectively enhancing the durability and longevity of the steel. This is particularly invaluable in industries where the steel is exposed to corrosive environments, such as chemical processing, marine applications, and oil and gas exploration. Moreover, tungsten significantly aids in the machinability of special steel. It assists in reducing the occurrence of built-up edges during cutting operations, resulting in improved surface finish and prolonged tool life. This characteristic proves highly advantageous in industries that require precision machining, such as automotive, aerospace, and tool manufacturing. In conclusion, the presence of tungsten in special steel is of utmost importance as it enhances strength, hardness, high-temperature performance, corrosion resistance, and machinability. Its unique properties make it an indispensable component in the production of high-quality steel utilized across various industries.

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