DIN1.7225 Alloy Structural Steel Rod 4140 Special Steel

DIN1.7225 Alloy Structural Steel Rod 4140 Special Steel

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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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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 4140 round steel	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 4140 round steel	Hot Rolled: Dia.(mm)L(mm)=14-2002000-6000
	Forged: Dia.(mm)L(mm)=210-8002000-6000
Application of 4140 round steel	(1) Commonly used for manufacturing 35CrMo higher than the required strength, large parts of the important sectional dimensions, such as axis, gear, connecting rod, transmission gears, the supercharger gear, engine cylinder, spring, spring clamps, 12-2000mm oil pipe fittings, fishing tools and instead of containing nickel steel high. (2) For main shaft of steamer,boly for 400 °C. Hummar shank.
Characteristic of 4140 round steel	(1) Chromium molybdenum high tensile steel with yield strength of 550N/mm2. (2) Chromium renders steel oil hardenable and increase hardenability. (3) Weldability suffers with increasing chromium content. (4) High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum. (5) Molybdenum significantly reduces temper brittleness.
Heat Treatment of 4140 round steel	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 Properties of 4140 round steel	Tensile str. (N/mm2):1080 Yield point (N/mm2):930 Elongation (%):12 Contraction (%):45 Impack work (J/cm2):63 Hardness (HB):217
Delivery Condition of 4140 round steel	hot rolled, black surface, annealed
Payment Term of 4140 round steel	L/C at sight,T/T,30% in advance,70% before the shipment

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DIN1.7225 Alloy Structural Steel Rod 4140 Special Steel

Q: What are the different peening techniques used for special steel?: There are several peening techniques used for special steel, including shot peening, ultrasonic peening, laser peening, and cavitation peening. Each technique involves using different methods and tools to introduce controlled compressive stresses into the material's surface, improving its mechanical properties and resistance to fatigue, stress corrosion, and other forms of degradation.

Q: What are the main factors affecting the strength of special steel?: The main factors affecting the strength of special steel include the composition of the steel, heat treatment processes, and the presence of impurities and defects in the material. Additionally, factors such as grain size, crystal structure, and the presence of alloying elements also play a significant role in determining the strength of special steel.

Q: What are the different types of corrosion-resistant steel?: There are several different types of corrosion-resistant steel, including stainless steel, galvanized steel, weathering steel, and nickel alloy steel.

Q: What are the properties of shock-resistant steel?: Shock-resistant steel, also known as impact-resistant steel, possesses several properties that make it highly resistant to shock or impact. Firstly, it exhibits a high level of toughness, meaning it can absorb a significant amount of energy without fracturing or breaking. This toughness is often achieved through the use of alloying elements, such as manganese, nickel, or chromium, which enhance the steel's ability to absorb and distribute the energy of an impact. Additionally, shock-resistant steel has a high tensile strength, allowing it to resist deformation under high-stress conditions. This property enables the steel to maintain its structural integrity and prevent permanent damage when subjected to sudden or intense impacts. Furthermore, shock-resistant steel often displays excellent ductility, enabling it to undergo plastic deformation without fracturing. This ductility allows the steel to absorb and dissipate energy, ensuring that it remains intact even in high-impact scenarios. Overall, the properties of shock-resistant steel make it a reliable and durable material for applications requiring resistance to sudden impacts, such as construction equipment, armored vehicles, and machinery components.

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: How does special steel perform in terms of wear resistance?: Special steel is known for its exceptional wear resistance. Due to its unique composition and heat treatment, it exhibits a higher level of hardness and toughness compared to regular steel. This enables it to withstand abrasion, impact, and other forms of wear, making it highly suitable for applications where durability and longevity are crucial, such as in industrial machinery, cutting tools, and automotive components.

Q: What are the properties of magnetic steel?: Magnetic steel possesses several properties that make it suitable for various applications. It exhibits ferromagnetism, meaning it can be magnetized and holds a magnetic field strongly. This property enables it to attract and repel other magnetic materials. Magnetic steel also has high permeability, allowing magnetic flux to pass through it easily. It has a high saturation magnetization, meaning it can hold a strong magnetic field. Furthermore, magnetic steel demonstrates excellent mechanical strength, durability, and corrosion resistance, making it ideal for use in industries such as electrical engineering, automotive, and construction.

Q: Can special steel be used in construction?: Yes, special steel can be used in construction. Special steel, also known as alloy steel, offers superior strength, durability, and resistance to corrosion and wear compared to regular steel. It is commonly used in the construction of high-rise buildings, bridges, and other structures that require exceptional strength and longevity. Additionally, special steel can be customized to meet specific project requirements, making it a versatile choice for construction applications.

Q: How is wear-resistant steel used in mining equipment?: Wear-resistant steel is commonly used in mining equipment due to its high durability and strength. It is utilized in various applications such as excavator buckets, crusher liners, and conveyor parts to withstand the harsh conditions of mining operations. The wear-resistant properties of this steel help to minimize abrasion and extend the equipment's lifespan, resulting in increased productivity and reduced maintenance costs.

Q: What are the requirements for special steel used in defense equipment manufacturing?: The requirements for special steel used in defense equipment manufacturing typically include high strength and durability, resistance to corrosion and wear, good toughness and impact resistance, as well as the ability to withstand extreme temperatures and harsh environments. Additionally, the steel must meet stringent quality control standards and industry specifications to ensure its reliability and performance in critical defense applications.

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