• Steel SKT4 Alloy Steel Round Bar Special Steel System 1
  • Steel SKT4 Alloy Steel Round Bar Special Steel System 2
  • Steel SKT4 Alloy Steel Round Bar Special Steel System 3
Steel SKT4 Alloy Steel Round Bar Special Steel

Steel SKT4 Alloy Steel Round Bar 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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Item specifice

Type:
Alloy Steel
Shape:
Steel Round Bar
Standard:
EN,DIN,BS,GB,JIS,ASTM,AISI,API
Technique:
Hot Rolled,Spring,EFW,Extruded,Forged,ERW,Cold Drawn,Cold Rolled
Steel Grade:
Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400,200 Series,300 Series,400 Series,600 Series,SS400-SS490,10#,20#,A53(A,B)
Certification:
ISO,SGS,BV,IBR,RoHS,CE,API,BSI,UL
Surface Treatment:
PVDF Coated,Bright,Polished,Chromed Passivation,Dry,Oiled,Color Coated,Copper Coated,Coated,Galvanized,Black
Thickness:
as required
Shape:
Round,Hexagonal,C Channel,Square,U Channel
Length:
as required
Net Weight:
as required

Chemical Composition%

CountryStandardCSiMnCrNiMoSPOther
China(GB)5CrNiMo0.50-0.60≤0.400.50-0.800.50-0.801.40-1.800.15-0.30≤0.030≤0.030-
USA(ASTM)L60.65-0.750.20-0.400.55-0.650.65-0.851.25-1.750.25--V:0.25
Germany(DIN)1.27130.50-0.600.10-0.400.65-0.950.60-0.801.50-1.800.25-0.35--V:0.07-0.12
Japan(JIS)SKT40.50-0.60≤0.350.60-1.000.70-1.001.30-2.00.20-0.50≤0.030≤0.030-

 

Available Size

Rolled Round Barφ12-80mm
Forged Round BarΦ85-600mm

 

Heat Treatment

ProcessingTemperature ℃Hardness
Anneal760-780197-241HB
Quenching830-86053-58HRC
Tempering490-51044-47HRC
520-54038-42HRC
560-58034-37HRC

 

Characterstics

1.High toughness and strength
2.Higher abrasion resistance 
3.Remaining hardness of HB300 at 500℃
4.Insensitive to tempering brittleness due to addition of Mo

 

Applications: Suitable for large and medium sized forging dies with thickness of 250-350mm for automobiles,tractors,transmission gears,front axle beams and rear axles of automobiles,and forging dies for engineering machine components.

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Steel SKT4 Alloy Steel Round Bar Special Steel

1, Your advantages?

     professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale

2, Test & Certificate?

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

3, Payment Terms?

    30% TT as deposit and 70% before delivery.

    Irrevocable L/C at sight.

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    EXW, FOB, CIF, FFR, CNF

6, After-sale Service?

    WE provides the services and support you need for every step of our cooperation. We're the business partner you can trust.

     For any problem, please kindly contact us at any your convenient time.

We'll reply you in our first priority within 24 hours.


Q:Can special steel be used in the chemical processing industry?
Yes, special steel can be used in the chemical processing industry. Special steel alloys, such as stainless steel, offer excellent corrosion resistance and high strength, making them suitable for various applications in chemical plants. These steels can withstand the harsh conditions, chemicals, and high temperatures typically encountered in chemical processing, ensuring the safety and efficiency of the operations.
Q:What are the different heat treatment processes used for special steel?
Some of the different heat treatment processes used for special steel include annealing, tempering, quenching, and hardening.
Q:What are the different methods of surface tumbling for special steel?
There are several methods of surface tumbling that can be used for special steel. These methods include barrel tumbling, vibratory tumbling, and centrifugal tumbling. Barrel tumbling is a common method used for surface finishing of special steel. In this process, the steel parts are placed in a rotating barrel along with abrasive media. The barrel then rotates, causing the steel parts to tumble and come into contact with the abrasive media. This action helps to remove any burrs, sharp edges, or surface imperfections from the steel parts, resulting in a smoother and more polished surface finish. Vibratory tumbling is another method that can be used for surface tumbling of special steel. In this process, the steel parts are placed in a vibrating container along with abrasive media. The vibration causes the steel parts to move and come into contact with the abrasive media, effectively removing any surface imperfections. Vibratory tumbling is often preferred for delicate or complex-shaped steel parts, as it provides a gentler action compared to barrel tumbling. Centrifugal tumbling is a specialized method that utilizes centrifugal force to achieve surface tumbling of special steel. In this process, the steel parts are placed inside a rotating drum, which is then spun at a high speed. The centrifugal force causes the steel parts to move and come into contact with the abrasive media, resulting in the removal of any surface imperfections. Centrifugal tumbling is often used for smaller or more intricate steel parts, as it allows for precise control over the tumbling action. Overall, these different methods of surface tumbling provide various options for achieving the desired surface finish for special steel. The choice of method depends on factors such as the size, shape, and delicacy of the steel parts, as well as the desired level of surface finish.
Q:What are the different types of bearing steel?
There are several different types of bearing steel, including high-carbon chromium steel, high-carbon chromium-molybdenum steel, and case-hardened steel.
Q:How is silicon steel used in electrical transformers?
Silicon steel is used in electrical transformers as it possesses magnetic properties that allow it to efficiently conduct and transform electrical energy. The high silicon content in silicon steel helps reduce energy losses by minimizing the eddy current and hysteresis losses that occur during the transformer's operation. This results in improved efficiency and reduced heat generation, making silicon steel a crucial component in the construction of electrical transformers.
Q:What are the factors that affect the mechanical properties of special steel?
The mechanical properties of special steel can be influenced by various factors such as the chemical composition, heat treatment process, grain size, microstructure, and the presence of impurities or alloying elements. Additionally, factors like temperature, strain rate, and mechanical loading conditions can also impact the mechanical properties of special steel.
Q:What are the corrosion resistance properties of special steel?
Special steels are known for their excellent corrosion resistance properties. These steels have specific alloying elements added to enhance their resistance to corrosion, making them highly resistant to rust and various corrosive environments. Their composition and surface treatment provide a protective barrier against chemical reactions, moisture, and other corrosive agents, ensuring their durability and longevity in various applications.
Q:What are the main advantages of using special steel in the marine industry?
The main advantages of using special steel in the marine industry include its high strength and corrosion resistance, which are crucial for withstanding the harsh marine environment. Special steel also offers excellent weldability and formability, enabling the construction of complex structures and components. Additionally, its durability and long service life contribute to reduced maintenance and replacement costs.
Q:What are the different methods for case hardening special steel?
There are several different methods for case hardening special steel, each with its own advantages and applications. 1. Carburizing: This method involves heating the steel in a carbon-rich environment at high temperatures. Carbon atoms diffuse into the surface of the steel, forming a hard and wear-resistant outer layer. Carburizing can be done through various techniques such as gas carburizing, pack carburizing, or liquid carburizing. 2. Nitriding: Nitriding is a process where the steel is heated in a nitrogen-rich environment. Nitrogen atoms diffuse into the surface of the steel, forming a hard and corrosion-resistant layer. This process is mainly used for steels with high alloy content. 3. Induction hardening: Induction hardening utilizes induction heating to selectively heat the surface of the steel. Once heated, a quenching process rapidly cools the surface, resulting in a hard layer. Induction hardening is ideal for parts that require localized hardening, such as gears or shafts. 4. Flame hardening: Flame hardening involves heating the surface of the steel with a high-temperature flame and then rapidly cooling it. This method is commonly used for large parts or components that cannot be easily treated with other methods. 5. Laser hardening: Laser hardening is a precise and localized method that uses a laser beam to heat and harden specific areas of the steel. This technique is highly controlled and allows for precise control over the hardened layer depth and hardness. Each method has its own advantages and limitations, and the choice of case hardening method depends on factors such as the desired hardness, the size and shape of the part, and the specific requirements of the application.
Q:Can special steel be used for making automotive engine components?
Yes, special steel can be used for making automotive engine components. Special steel is often used in the manufacturing of engine components due to its high strength, durability, and resistance to wear and corrosion. Engine components such as crankshafts, connecting rods, camshafts, and valves require materials that can withstand high temperatures, pressures, and mechanical stresses. Special steel, such as high-strength alloy steel or stainless steel, meets these requirements and provides the necessary performance characteristics for automotive engines. Additionally, special steel can offer weight reduction benefits, which can contribute to improved fuel efficiency and performance of the engine. Overall, special steel is a suitable material choice for making automotive engine components due to its exceptional mechanical properties and ability to withstand the demanding operating conditions of an engine.

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