Special Steel Gear Steel SCM420H Round Bar

Special Steel Gear Steel SCM420H Round Bar System 1

Special Steel Gear Steel SCM420H Round Bar

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 30 m.t.

Supply Capability:: 10000 m.t./month

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Product information:

1. Grade Comparison

GB	DIN	JIS	NF	BS	AISI
20CrMoH	25CrMo4	SCM420	25CrMo4	25CrMo4	4118

2. Specification

Commodity	SCM420H Round bar
diameter	10-300mm
Length	3000-15000mm
Productive Technology	Hot-Rolled
Tolerance	+/-0.15mm
Application	Gear. Axis. Ring. Gears shafts. Sliding bearing spindle beams and Clutch etc
	C	0.17-0.23
Chemical Composition of Material	Si	0.15-0.35
	Mn	0.55-0.90
	P	0.030
	S	0.030
	Cr	0.85-1.25
	Ni	0.030
	Cu	0.030
Mechanical Property	Tensile Strength	1080
	Yield Strength	835
	Extension	≥10
	Hardness	217HB

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Special Steel Gear Steel SCM420H 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: How does special steel contribute to the marine industry?: The marine industry greatly relies on special steel due to its exceptional strength, durability, and corrosion resistance, which are vital qualities for various marine applications. A significant role of special steel in the marine industry lies in the building of ships and submarines. These vessels face harsh environmental conditions, such as exposure to saltwater, extreme temperatures, and high pressures. Special steel, such as high-strength low-alloy (HSLA) steel or stainless steel, ensures the structural integrity of these vessels and improves their overall performance. The high strength-to-weight ratio of the steel allows for the creation of lighter yet sturdy hulls, enabling ships and submarines to navigate rough seas more effectively. In addition, special steel is extensively used in marine equipment and components. For instance, it is utilized in the manufacturing of propeller shafts, rudders, and other crucial parts that need to withstand the forces exerted by water. Stainless steel, with its corrosion-resistant properties, is ideal for various marine fittings like valves, fasteners, and pipes, guaranteeing longevity and efficient operation in highly corrosive marine environments. Furthermore, special steel finds applications in offshore structures such as oil rigs, platforms, and wind turbines. These structures must endure harsh conditions like strong ocean currents, heavy waves, and corrosive saltwater. Special steel grades like carbon-manganese steel or weathering steel are specifically designed to provide exceptional strength and corrosion resistance, making them suitable for offshore installations. Lastly, in the marine industry, special steel is indispensable for fabricating marine containers and cargo handling equipment. The steel's high tensile strength and impact resistance ensure the safe transportation of goods by sea, making sure that containers can withstand dynamic forces during shipping and protect the cargo from water intrusion. All in all, special steel's unique properties make it an essential material in the marine industry. Its strength, durability, and corrosion resistance significantly contribute to the construction of ships, submarines, offshore structures, marine equipment, and cargo containers, enabling safe and efficient maritime operations.

Q: How does special steel withstand high-velocity impacts?: Special steel is able to withstand high-velocity impacts due to its unique properties and composition. One key factor is its high strength and hardness, which allows it to resist deformation and fracture under extreme forces. Special steel also often contains alloying elements such as chromium, molybdenum, nickel, and vanadium, which contribute to its exceptional toughness and impact resistance. Furthermore, special steel is often heat-treated to enhance its mechanical properties. Through processes such as quenching and tempering, the steel's microstructure is altered, resulting in a fine-grained structure with improved strength and hardness. This heat treatment also enhances the steel's ability to absorb and dissipate energy during high-velocity impacts, reducing the risk of failure. Moreover, special steel is often designed with specific alloys and compositions to enhance its performance in particular applications. For example, some grades of steel are specifically engineered for armor applications, where they must withstand high-velocity impacts from projectiles. These steels may have additional elements such as boron or titanium, which further enhance their ability to resist penetration and deformation under extreme loads. In summary, special steel's ability to withstand high-velocity impacts is attributed to its high strength, hardness, toughness, and impact resistance. Its unique composition, heat treatment processes, and targeted design make it a reliable choice for applications where impact resistance is crucial.

Q: How does nitriding improve the wear resistance of special steel?: Nitriding improves the wear resistance of special steel by introducing nitrogen into the surface of the material, forming a hard layer of iron nitrides. This hard layer increases the surface hardness and reduces the friction between the material and other surfaces, resulting in enhanced resistance to wear and improved performance in high-stress environments.

Q: What is the impact strength of special steel?: The impact strength of special steel is typically higher than that of regular steel, which means it can withstand greater force or shock without breaking or deforming.

Q: How does special steel perform in additive manufacturing applications?: Special steel performs well in additive manufacturing applications due to its high strength, durability, and resistance to wear and corrosion. The unique properties of special steel, such as its ability to withstand high temperatures and extreme environments, make it an ideal material for 3D printing processes. Additionally, the flexibility and customization offered by additive manufacturing allows for the creation of complex geometries and intricate designs, further enhancing the performance of special steel in various applications.

Q: How is special steel used in the manufacturing of consumer goods?: Various consumer goods benefit from the utilization of special steel in their manufacturing processes. Notably, high-quality kitchen knives and utensils are produced using special steel, including Damascus steel and stainless steel. The outstanding strength, durability, and resistance to corrosion of special steel contribute to the ability of these goods to withstand daily use, retain sharpness over extended periods, and resist rust and staining. Moreover, the production of watch components greatly benefits from the incorporation of special steel. Particularly, stainless steel is widely employed in the manufacturing of watch cases, bezels, and bracelets due to its attractive appearance and ability to resist scratches and tarnishing. Additionally, special steel alloys are frequently utilized in the creation of watch springs, which necessitate high strength, elasticity, and resistance to fatigue. Furthermore, special steel finds application in the manufacturing of automotive parts, hand tools, and firearms. In the automotive industry, special steel is employed in the production of engine components, chassis parts, and suspension systems, among other uses. The exceptional strength, impact resistance, and heat resistance of special steel ensure the durability and reliability of these consumer goods. Hand tools such as wrenches, pliers, and screwdrivers also benefit from the utilization of special steel. These tools require robust and long-lasting materials to withstand the forces exerted during use. Special steel satisfies these requirements, offering the necessary strength and resistance against wear and tear. Lastly, firearms heavily rely on special steel due to its exceptional strength, impact resistance, and heat resistance. Firearms must endure high pressures and temperatures generated while firing, making special steel an excellent choice for critical components such as barrels and chambers. In conclusion, special steel plays a vital role in the manufacturing of consumer goods, encompassing kitchen utensils, watches, automotive parts, hand tools, and firearms. Its remarkable properties, including strength, durability, corrosion resistance, and heat resistance, position it as a preferred material for these applications, ensuring the creation of high-quality and long-lasting products for consumers.

Q: What is the impact of impurities on the properties of special steel?: The presence of impurities in special steel can have a significant impact on its properties. Impurities can weaken the steel's structural integrity, reduce its mechanical strength, and compromise its corrosion resistance. High levels of impurities can also affect the steel's ability to be fabricated or shaped into desired forms. Therefore, it is crucial to minimize impurities during the manufacturing process to ensure that special steel maintains its desired properties and performance characteristics.

Q: How is special steel tested for quality and performance?: Special steel is tested for quality and performance through a variety of methods including chemical analysis, mechanical testing, hardness testing, and non-destructive testing. These tests help ensure that the steel meets the required specifications and standards, ensuring its reliability and performance in various applications.

Q: What are the cutting tools used for machining special steel?: The cutting tools used for machining special steel include carbide inserts, high-speed steel (HSS) tools, ceramic tools, and diamond-coated tools. These tools are designed to withstand the high temperatures and hardness of special steels, ensuring efficient and precise cutting operations.

Q: What are the limitations of using special steel in marine environments?: Special steel, while highly durable and resistant to corrosion, does have its limitations when used in marine environments. One of the main limitations is its susceptibility to pitting corrosion. Due to the presence of chloride ions in seawater, special steel can develop localized corrosion known as pitting, which can weaken the material and compromise its structural integrity. Furthermore, special steel may also be prone to stress corrosion cracking in marine environments. When exposed to tensile stress and corrosive agents, such as saltwater, the material can develop small cracks that propagate over time, leading to catastrophic failures. This makes it crucial to carefully monitor and manage the stress levels to prevent such occurrences. Additionally, special steel can be affected by galvanic corrosion when in contact with different metals or alloys in a marine environment. This occurs due to the electrochemical potential difference between the metals, resulting in accelerated corrosion of the less noble material. This requires careful consideration when selecting other materials for use in conjunction with special steel to avoid galvanic corrosion. Moreover, the cost of special steel can be significantly higher compared to other materials used in marine environments. This can pose a limitation, especially for projects with budget constraints. The higher costs of special steel may make it less financially viable for certain applications, leading to the exploration of alternative materials for marine applications. Lastly, the weight of special steel can also pose limitations in marine environments. Its density can contribute to increased weight, which affects the buoyancy and overall stability of marine vessels. This can impact the performance and maneuverability of ships and offshore structures, necessitating careful engineering and design considerations. In conclusion, while special steel offers excellent durability and corrosion resistance, it does have limitations when used in marine environments. Pitting corrosion, stress corrosion cracking, galvanic corrosion, higher costs, and weight considerations are some of the factors that need to be carefully managed and accounted for when utilizing special steel in marine applications.

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